diff --git a/ .gitignore b/ .gitignore
new file mode 100644
index 00000000..3232a0b4
--- /dev/null
+++ b/ .gitignore
@@ -0,0 +1,18 @@
+# Gradle 빌드 결과물
+build/
+.gradle/
+discodeit/build/
+discodeit/.gradle/
+
+# IntelliJ 설정 파일
+.idea/
+out/
+*.iml
+
+# 컴파일된 클래스 및 직렬화 파일
+*.class
+*.ser
+
+# OS 부산물
+.DS_Store
+Thumbs.db
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 00000000..c3f502a1
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# 디폴트 무시된 파일
+/shelf/
+/workspace.xml
+# 에디터 기반 HTTP 클라이언트 요청
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
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new file mode 100644
index 00000000..d6ebd480
--- /dev/null
+++ b/.idea/9-sprint-mission.iml
@@ -0,0 +1,9 @@
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\ No newline at end of file
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new file mode 100644
index 00000000..50f378b9
--- /dev/null
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\ No newline at end of file
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new file mode 100644
index 00000000..9137a537
--- /dev/null
+++ b/.idea/gradle.xml
@@ -0,0 +1,17 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__ch_qos_logback_logback_classic_1_5_25.xml b/.idea/libraries/Gradle__ch_qos_logback_logback_classic_1_5_25.xml
new file mode 100644
index 00000000..c79918f7
--- /dev/null
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@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__ch_qos_logback_logback_core_1_5_25.xml b/.idea/libraries/Gradle__ch_qos_logback_logback_core_1_5_25.xml
new file mode 100644
index 00000000..2a114d15
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_annotations_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_annotations_2_19_4.xml
new file mode 100644
index 00000000..cf69bbfc
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_core_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_core_2_19_4.xml
new file mode 100644
index 00000000..d96feec3
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_databind_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_core_jackson_databind_2_19_4.xml
new file mode 100644
index 00000000..6292188b
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_datatype_jackson_datatype_jdk8_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_datatype_jackson_datatype_jdk8_2_19_4.xml
new file mode 100644
index 00000000..05ece6c6
--- /dev/null
+++ b/.idea/libraries/Gradle__com_fasterxml_jackson_datatype_jackson_datatype_jdk8_2_19_4.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_datatype_jackson_datatype_jsr310_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_datatype_jackson_datatype_jsr310_2_19_4.xml
new file mode 100644
index 00000000..be18facc
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_fasterxml_jackson_module_jackson_module_parameter_names_2_19_4.xml b/.idea/libraries/Gradle__com_fasterxml_jackson_module_jackson_module_parameter_names_2_19_4.xml
new file mode 100644
index 00000000..985cdbed
--- /dev/null
+++ b/.idea/libraries/Gradle__com_fasterxml_jackson_module_jackson_module_parameter_names_2_19_4.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_jayway_jsonpath_json_path_2_9_0.xml b/.idea/libraries/Gradle__com_jayway_jsonpath_json_path_2_9_0.xml
new file mode 100644
index 00000000..74d321aa
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__com_vaadin_external_google_android_json_0_0_20131108_vaadin1.xml b/.idea/libraries/Gradle__com_vaadin_external_google_android_json_0_0_20131108_vaadin1.xml
new file mode 100644
index 00000000..c44d5a47
--- /dev/null
+++ b/.idea/libraries/Gradle__com_vaadin_external_google_android_json_0_0_20131108_vaadin1.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__io_micrometer_micrometer_commons_1_15_8.xml b/.idea/libraries/Gradle__io_micrometer_micrometer_commons_1_15_8.xml
new file mode 100644
index 00000000..b7ab0bb0
--- /dev/null
+++ b/.idea/libraries/Gradle__io_micrometer_micrometer_commons_1_15_8.xml
@@ -0,0 +1,10 @@
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+
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__io_micrometer_micrometer_observation_1_15_8.xml b/.idea/libraries/Gradle__io_micrometer_micrometer_observation_1_15_8.xml
new file mode 100644
index 00000000..9f754de3
--- /dev/null
+++ b/.idea/libraries/Gradle__io_micrometer_micrometer_observation_1_15_8.xml
@@ -0,0 +1,10 @@
+
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__jakarta_activation_jakarta_activation_api_2_1_4.xml b/.idea/libraries/Gradle__jakarta_activation_jakarta_activation_api_2_1_4.xml
new file mode 100644
index 00000000..2353fe39
--- /dev/null
+++ b/.idea/libraries/Gradle__jakarta_activation_jakarta_activation_api_2_1_4.xml
@@ -0,0 +1,10 @@
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+
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__jakarta_annotation_jakarta_annotation_api_2_1_1.xml b/.idea/libraries/Gradle__jakarta_annotation_jakarta_annotation_api_2_1_1.xml
new file mode 100644
index 00000000..2650a52f
--- /dev/null
+++ b/.idea/libraries/Gradle__jakarta_annotation_jakarta_annotation_api_2_1_1.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__jakarta_xml_bind_jakarta_xml_bind_api_4_0_4.xml b/.idea/libraries/Gradle__jakarta_xml_bind_jakarta_xml_bind_api_4_0_4.xml
new file mode 100644
index 00000000..96c71aef
--- /dev/null
+++ b/.idea/libraries/Gradle__jakarta_xml_bind_jakarta_xml_bind_api_4_0_4.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_1_17_8.xml b/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_1_17_8.xml
new file mode 100644
index 00000000..020ea785
--- /dev/null
+++ b/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_1_17_8.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_agent_1_17_8.xml b/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_agent_1_17_8.xml
new file mode 100644
index 00000000..a47ac768
--- /dev/null
+++ b/.idea/libraries/Gradle__net_bytebuddy_byte_buddy_agent_1_17_8.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__net_minidev_accessors_smart_2_5_2.xml b/.idea/libraries/Gradle__net_minidev_accessors_smart_2_5_2.xml
new file mode 100644
index 00000000..ef0f3723
--- /dev/null
+++ b/.idea/libraries/Gradle__net_minidev_accessors_smart_2_5_2.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__net_minidev_json_smart_2_5_2.xml b/.idea/libraries/Gradle__net_minidev_json_smart_2_5_2.xml
new file mode 100644
index 00000000..15240115
--- /dev/null
+++ b/.idea/libraries/Gradle__net_minidev_json_smart_2_5_2.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_api_2_24_3.xml b/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_api_2_24_3.xml
new file mode 100644
index 00000000..4142aa26
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_api_2_24_3.xml
@@ -0,0 +1,10 @@
+
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+
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_to_slf4j_2_24_3.xml b/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_to_slf4j_2_24_3.xml
new file mode 100644
index 00000000..3a31f208
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apache_logging_log4j_log4j_to_slf4j_2_24_3.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_core_10_1_50.xml b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_core_10_1_50.xml
new file mode 100644
index 00000000..aaa23bf6
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_core_10_1_50.xml
@@ -0,0 +1,10 @@
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+
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_el_10_1_50.xml b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_el_10_1_50.xml
new file mode 100644
index 00000000..18e3720a
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_el_10_1_50.xml
@@ -0,0 +1,10 @@
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+
\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_websocket_10_1_50.xml b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_websocket_10_1_50.xml
new file mode 100644
index 00000000..a6070d40
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apache_tomcat_embed_tomcat_embed_websocket_10_1_50.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_apiguardian_apiguardian_api_1_1_2.xml b/.idea/libraries/Gradle__org_apiguardian_apiguardian_api_1_1_2.xml
new file mode 100644
index 00000000..31fbc189
--- /dev/null
+++ b/.idea/libraries/Gradle__org_apiguardian_apiguardian_api_1_1_2.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_assertj_assertj_core_3_27_6.xml b/.idea/libraries/Gradle__org_assertj_assertj_core_3_27_6.xml
new file mode 100644
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--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_awaitility_awaitility_4_2_2.xml b/.idea/libraries/Gradle__org_awaitility_awaitility_4_2_2.xml
new file mode 100644
index 00000000..a626a4b3
--- /dev/null
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_hamcrest_hamcrest_3_0.xml b/.idea/libraries/Gradle__org_hamcrest_hamcrest_3_0.xml
new file mode 100644
index 00000000..4f2f4a0d
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_5_12_2.xml b/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_5_12_2.xml
new file mode 100644
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diff --git a/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_api_5_12_2.xml b/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_api_5_12_2.xml
new file mode 100644
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--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_engine_5_12_2.xml b/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_engine_5_12_2.xml
new file mode 100644
index 00000000..7fcc89c4
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_params_5_12_2.xml b/.idea/libraries/Gradle__org_junit_jupiter_junit_jupiter_params_5_12_2.xml
new file mode 100644
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diff --git a/.idea/libraries/Gradle__org_junit_platform_junit_platform_commons_1_12_2.xml b/.idea/libraries/Gradle__org_junit_platform_junit_platform_commons_1_12_2.xml
new file mode 100644
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diff --git a/.idea/libraries/Gradle__org_junit_platform_junit_platform_engine_1_12_2.xml b/.idea/libraries/Gradle__org_junit_platform_junit_platform_engine_1_12_2.xml
new file mode 100644
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diff --git a/.idea/libraries/Gradle__org_junit_platform_junit_platform_launcher_1_12_2.xml b/.idea/libraries/Gradle__org_junit_platform_junit_platform_launcher_1_12_2.xml
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diff --git a/.idea/libraries/Gradle__org_mockito_mockito_core_5_17_0.xml b/.idea/libraries/Gradle__org_mockito_mockito_core_5_17_0.xml
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diff --git a/.idea/libraries/Gradle__org_mockito_mockito_junit_jupiter_5_17_0.xml b/.idea/libraries/Gradle__org_mockito_mockito_junit_jupiter_5_17_0.xml
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_slf4j_jul_to_slf4j_2_0_17.xml b/.idea/libraries/Gradle__org_slf4j_jul_to_slf4j_2_0_17.xml
new file mode 100644
index 00000000..709af04c
--- /dev/null
+++ b/.idea/libraries/Gradle__org_slf4j_jul_to_slf4j_2_0_17.xml
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diff --git a/.idea/libraries/Gradle__org_slf4j_slf4j_api_2_0_17.xml b/.idea/libraries/Gradle__org_slf4j_slf4j_api_2_0_17.xml
new file mode 100644
index 00000000..4f93cae8
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_3_5_10.xml
new file mode 100644
index 00000000..67e59c74
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_autoconfigure_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_autoconfigure_3_5_10.xml
new file mode 100644
index 00000000..30b106be
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_3_5_10.xml
new file mode 100644
index 00000000..ea534752
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_json_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_json_3_5_10.xml
new file mode 100644
index 00000000..da2ebe02
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_json_3_5_10.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_logging_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_logging_3_5_10.xml
new file mode 100644
index 00000000..95adf737
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_logging_3_5_10.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_test_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_test_3_5_10.xml
new file mode 100644
index 00000000..f53aab3d
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_tomcat_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_tomcat_3_5_10.xml
new file mode 100644
index 00000000..88421b59
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_tomcat_3_5_10.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_web_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_starter_web_3_5_10.xml
new file mode 100644
index 00000000..fb3ee7e8
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_test_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_test_3_5_10.xml
new file mode 100644
index 00000000..6afabd63
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_boot_spring_boot_test_autoconfigure_3_5_10.xml b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_test_autoconfigure_3_5_10.xml
new file mode 100644
index 00000000..a2450c5d
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_boot_spring_boot_test_autoconfigure_3_5_10.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_springframework_spring_aop_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_aop_6_2_15.xml
new file mode 100644
index 00000000..baa4da04
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_aop_6_2_15.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_springframework_spring_beans_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_beans_6_2_15.xml
new file mode 100644
index 00000000..3260475e
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_beans_6_2_15.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_context_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_context_6_2_15.xml
new file mode 100644
index 00000000..3b2d9031
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_context_6_2_15.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_core_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_core_6_2_15.xml
new file mode 100644
index 00000000..2a749092
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_core_6_2_15.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_expression_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_expression_6_2_15.xml
new file mode 100644
index 00000000..8c962dd1
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_expression_6_2_15.xml
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_jcl_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_jcl_6_2_15.xml
new file mode 100644
index 00000000..93a78973
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_test_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_test_6_2_15.xml
new file mode 100644
index 00000000..cc37df08
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_web_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_web_6_2_15.xml
new file mode 100644
index 00000000..c4bac6f9
--- /dev/null
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diff --git a/.idea/libraries/Gradle__org_springframework_spring_webmvc_6_2_15.xml b/.idea/libraries/Gradle__org_springframework_spring_webmvc_6_2_15.xml
new file mode 100644
index 00000000..cf37a4a9
--- /dev/null
+++ b/.idea/libraries/Gradle__org_springframework_spring_webmvc_6_2_15.xml
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diff --git a/.idea/libraries/Gradle__org_xmlunit_xmlunit_core_2_10_4.xml b/.idea/libraries/Gradle__org_xmlunit_xmlunit_core_2_10_4.xml
new file mode 100644
index 00000000..f88b6a1a
--- /dev/null
+++ b/.idea/libraries/Gradle__org_xmlunit_xmlunit_core_2_10_4.xml
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\ No newline at end of file
diff --git a/.idea/libraries/Gradle__org_yaml_snakeyaml_2_4.xml b/.idea/libraries/Gradle__org_yaml_snakeyaml_2_4.xml
new file mode 100644
index 00000000..b4aeb14f
--- /dev/null
+++ b/.idea/libraries/Gradle__org_yaml_snakeyaml_2_4.xml
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\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 00000000..92c59520
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,10 @@
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\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 00000000..89f7d060
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,11 @@
+
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\ No newline at end of file
diff --git a/.idea/modules/discodeit.main.iml b/.idea/modules/discodeit.main.iml
new file mode 100644
index 00000000..543b4ae4
--- /dev/null
+++ b/.idea/modules/discodeit.main.iml
@@ -0,0 +1,58 @@
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diff --git a/.idea/modules/discodeit.test.iml b/.idea/modules/discodeit.test.iml
new file mode 100644
index 00000000..b2135388
--- /dev/null
+++ b/.idea/modules/discodeit.test.iml
@@ -0,0 +1,86 @@
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diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 00000000..35eb1ddf
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
+
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\ No newline at end of file
diff --git a/categories.ser b/categories.ser
new file mode 100644
index 00000000..3d0c6bfb
Binary files /dev/null and b/categories.ser differ
diff --git a/channels.ser b/channels.ser
new file mode 100644
index 00000000..419dc4b5
Binary files /dev/null and b/channels.ser differ
diff --git a/discodeit.iml b/discodeit.iml
new file mode 100644
index 00000000..c3ce4847
--- /dev/null
+++ b/discodeit.iml
@@ -0,0 +1,12 @@
+
+
+
+
+
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+
+
\ No newline at end of file
diff --git a/discodeit/.gitattributes b/discodeit/.gitattributes
new file mode 100644
index 00000000..8af972cd
--- /dev/null
+++ b/discodeit/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/discodeit/.gitignore b/discodeit/.gitignore
new file mode 100644
index 00000000..c2065bc2
--- /dev/null
+++ b/discodeit/.gitignore
@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/discodeit/build.gradle b/discodeit/build.gradle
new file mode 100644
index 00000000..31cd8cbb
--- /dev/null
+++ b/discodeit/build.gradle
@@ -0,0 +1,37 @@
+plugins {
+ id 'java'
+ id 'org.springframework.boot' version '3.5.10'
+ id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.sprint.mission'
+version = '0.0.1-SNAPSHOT'
+description = 'Spring Discodeit Project'
+
+java {
+ toolchain {
+ languageVersion = JavaLanguageVersion.of(17)
+ }
+}
+
+configurations {
+ compileOnly {
+ extendsFrom annotationProcessor
+ }
+}
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ implementation 'org.springframework.boot:spring-boot-starter-web'
+ compileOnly 'org.projectlombok:lombok'
+ annotationProcessor 'org.projectlombok:lombok'
+ testImplementation 'org.springframework.boot:spring-boot-starter-test'
+ testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+ useJUnitPlatform()
+}
diff --git a/discodeit/gradle/wrapper/gradle-wrapper.jar b/discodeit/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..1b33c55b
Binary files /dev/null and b/discodeit/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/discodeit/gradle/wrapper/gradle-wrapper.properties b/discodeit/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..aaaabb3c
--- /dev/null
+++ b/discodeit/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/discodeit/gradlew b/discodeit/gradlew
new file mode 100644
index 00000000..23d15a93
--- /dev/null
+++ b/discodeit/gradlew
@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+# Gradle start up script for POSIX generated by Gradle.
+#
+# Important for running:
+#
+# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+# noncompliant, but you have some other compliant shell such as ksh or
+# bash, then to run this script, type that shell name before the whole
+# command line, like:
+#
+# ksh Gradle
+#
+# Busybox and similar reduced shells will NOT work, because this script
+# requires all of these POSIX shell features:
+# * functions;
+# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+# * compound commands having a testable exit status, especially «case»;
+# * various built-in commands including «command», «set», and «ulimit».
+#
+# Important for patching:
+#
+# (2) This script targets any POSIX shell, so it avoids extensions provided
+# by Bash, Ksh, etc; in particular arrays are avoided.
+#
+# The "traditional" practice of packing multiple parameters into a
+# space-separated string is a well documented source of bugs and security
+# problems, so this is (mostly) avoided, by progressively accumulating
+# options in "$@", and eventually passing that to Java.
+#
+# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+# see the in-line comments for details.
+#
+# There are tweaks for specific operating systems such as AIX, CygWin,
+# Darwin, MinGW, and NonStop.
+#
+# (3) This script is generated from the Groovy template
+# https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+# within the Gradle project.
+#
+# You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+ APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
+ [ -h "$app_path" ]
+do
+ ls=$( ls -ld "$app_path" )
+ link=${ls#*' -> '}
+ case $link in #(
+ /*) app_path=$link ;; #(
+ *) app_path=$APP_HOME$link ;;
+ esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&2
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in #(
+ CYGWIN* ) cygwin=true ;; #(
+ Darwin* ) darwin=true ;; #(
+ MSYS* | MINGW* ) msys=true ;; #(
+ NONSTOP* ) nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD=$JAVA_HOME/jre/sh/java
+ else
+ JAVACMD=$JAVA_HOME/bin/java
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ if ! command -v java >/dev/null 2>&1
+ then
+ die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+ case $MAX_FD in #(
+ max*)
+ # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ MAX_FD=$( ulimit -H -n ) ||
+ warn "Could not query maximum file descriptor limit"
+ esac
+ case $MAX_FD in #(
+ '' | soft) :;; #(
+ *)
+ # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+ # shellcheck disable=SC2039,SC3045
+ ulimit -n "$MAX_FD" ||
+ warn "Could not set maximum file descriptor limit to $MAX_FD"
+ esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+# * args from the command line
+# * the main class name
+# * -classpath
+# * -D...appname settings
+# * --module-path (only if needed)
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+ APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+ CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+ JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ for arg do
+ if
+ case $arg in #(
+ -*) false ;; # don't mess with options #(
+ /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
+ [ -e "$t" ] ;; #(
+ *) false ;;
+ esac
+ then
+ arg=$( cygpath --path --ignore --mixed "$arg" )
+ fi
+ # Roll the args list around exactly as many times as the number of
+ # args, so each arg winds up back in the position where it started, but
+ # possibly modified.
+ #
+ # NB: a `for` loop captures its iteration list before it begins, so
+ # changing the positional parameters here affects neither the number of
+ # iterations, nor the values presented in `arg`.
+ shift # remove old arg
+ set -- "$@" "$arg" # push replacement arg
+ done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+# and any embedded shellness will be escaped.
+# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+# treated as '${Hostname}' itself on the command line.
+
+set -- \
+ "-Dorg.gradle.appname=$APP_BASE_NAME" \
+ -classpath "$CLASSPATH" \
+ -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+ "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+ die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+# set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+ printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+ xargs -n1 |
+ sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+ tr '\n' ' '
+ )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/discodeit/gradlew.bat b/discodeit/gradlew.bat
new file mode 100644
index 00000000..db3a6ac2
--- /dev/null
+++ b/discodeit/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/discodeit/settings.gradle b/discodeit/settings.gradle
new file mode 100644
index 00000000..2437dfb2
--- /dev/null
+++ b/discodeit/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'discodeit'
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/DiscodeitApplication.java b/discodeit/src/main/java/com/sprint/mission/discodeit/DiscodeitApplication.java
new file mode 100644
index 00000000..fb56c337
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/DiscodeitApplication.java
@@ -0,0 +1,139 @@
+package com.sprint.mission.discodeit;
+
+import com.sprint.mission.discodeit.dto.*;
+import com.sprint.mission.discodeit.entity.ChannelType;
+import com.sprint.mission.discodeit.manager.ChatManager;
+import com.sprint.mission.discodeit.service.*;
+import com.sprint.mission.discodeit.repository.UserStatusRepository;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.UUID;
+
+@SpringBootApplication
+public class DiscodeitApplication {
+ private static final DateTimeFormatter timeFormat = DateTimeFormatter.ofPattern("HH:mm:ss.SSS")
+ .withZone(ZoneId.systemDefault());
+
+ public static void main(String[] args) {
+ ConfigurableApplicationContext context = SpringApplication.run(DiscodeitApplication.class, args);
+
+ UserService userService = context.getBean(UserService.class);
+ ChannelService channelService = context.getBean(ChannelService.class);
+ MessageService messageService = context.getBean(MessageService.class);
+ AuthService authService = context.getBean(AuthService.class);
+ ChatManager chatManager = context.getBean(ChatManager.class);
+ UserStatusRepository statusRepo = context.getBean(UserStatusRepository.class);
+
+ System.out.println("\n" + "=".repeat(95));
+ System.out.println(" ".repeat(30) + "Discodeit 시스템 검증");
+ System.out.println("=".repeat(95));
+
+ // [1] 데이터 인프라 구축
+ System.out.println("\n[1] 인프라 생성: 멤버 유저 및 채널(공개/비공개) 구축");
+ UserDto.Response user1 = userService.create(new UserDto.CreateRequest("백지헌", "jiheon@fromis.com", "pw123", "010-2003-0417", null)).orElseThrow();
+ UserDto.Response user2 = userService.create(new UserDto.CreateRequest("박지원", "jiwon@fromis.com", "pw456", "010-1998-0320", null)).orElseThrow();
+
+ ChannelDto.Response publicChan1 = channelService.createPublicChannel(new ChannelDto.CreatePublicRequest("StayThisWay", "Summer Special Single", ChannelType.TEXT)).orElseThrow();
+ ChannelDto.Response publicChan2 = channelService.createPublicChannel(new ChannelDto.CreatePublicRequest("LikeYouBetter", "2024 Single Album", ChannelType.TEXT)).orElseThrow();
+ ChannelDto.Response privateChan = channelService.createPrivateChannel(new ChannelDto.CreatePrivateRequest("비밀채팅", "지헌과 지원의 비밀 대화", ChannelType.TEXT, List.of(user1.id(), user2.id()))).orElseThrow();
+
+ System.out.println("\n[2] 보안 인증: AuthService 예외 처리 및 로그인 세션 검증");
+ System.out.print("[Login Attempt 1] 백지헌 (Wrong Password): ");
+ try {
+ authService.login(new AuthDto.LoginRequest("jiheon@fromis.com", "wrong_pw"));
+ } catch (Exception e) {
+ System.out.println("인증 실패 (사유: " + e.getMessage() + ")");
+ }
+
+ System.out.print("[Login Attempt 2] 백지헌 (Correct Password): ");
+ try {
+ UserDto.Response loginUser = authService.login(new AuthDto.LoginRequest("jiheon@fromis.com", "pw123"));
+ System.out.println("인증 성공! 접속자: " + loginUser.displayName() + " / 상태: " + (loginUser.isOnline() ? "🟢 ONLINE" : "🔴 OFFLINE"));
+ } catch (Exception e) {
+ System.err.println("에러: " + e.getMessage());
+ }
+
+ // [메시지 전송]
+ chatManager.sendMessage(user1.id(), publicChan1.id(), "매일이 난 Sunday 월요일은 사라져");
+ chatManager.sendMessage(user2.id(), publicChan1.id(), "Stay this way 깊고 짙은 Blue");
+
+ System.out.println("\n[초기 시스템 스냅샷: 전원 ONLINE]");
+ // 지헌(user1) 시점으로 시스템 확인
+ printSystemSnapshot(userService, channelService, user1.id());
+ printMessageHistory(publicChan1.id(), messageService, chatManager);
+
+ // [3] 상태 시뮬레이션
+ System.out.println("\n[3] 상태 시뮬레이션: '백지헌' 활동 기록을 10분 전으로 수정 (OFFLINE 확인용)");
+ statusRepo.findByUserId(user1.id()).ifPresent(status -> {
+ status.setLastAccessedAt(java.time.Instant.now().minus(10, java.time.temporal.ChronoUnit.MINUTES));
+ statusRepo.save(status);
+ });
+
+ System.out.println("\n[중간 시스템 스냅샷: 지헌 OFFLINE 확인]");
+ printSystemSnapshot(userService, channelService, user1.id());
+
+ // [4] 데이터 무결성 테스트
+ System.out.println("\n[4] 무결성 검증: '백지헌' 삭제 시 연쇄 삭제 및 비공개 채널 인원 갱신");
+ userService.delete(user1.id());
+
+ System.out.println("\n[최종 시스템 스냅샷: 삭제 후 정합성 확인]");
+ printSystemSnapshot(userService, channelService, user2.id());
+ printMessageHistory(publicChan1.id(), messageService, chatManager);
+
+ // [5] 최종 보안 검증
+ System.out.println("\n[5] 최종 보안 검증: 삭제된 계정 로그인 시도 ");
+ try {
+ authService.login(new AuthDto.LoginRequest("jiheon@fromis.com", "pw123"));
+ } catch (Exception e) {
+ System.out.println("로그인 차단 성공 (사유: 존재하지 않는 유저)");
+ }
+
+ System.out.println("\n" + "=".repeat(95));
+ System.out.println(" ".repeat(38) + "테스트 종료");
+ System.out.println("=".repeat(95));
+ }
+
+ private static void printSystemSnapshot(UserService us, ChannelService cs, UUID viewerId) {
+ System.out.println("\n[USER STATUS TABLE]");
+ System.out.printf("%-12s | %-22s | %-13s | %-8s\n", "Display Name", "Email", "Phone", "Status");
+ System.out.println("-".repeat(75));
+ us.findAll().forEach(u -> {
+ String statusEmoji = u.isOnline() ? "🔵 ONLINE" : "🟠 OFFLINE";
+ System.out.printf("%-12s | %-22s | %-13s | %-8s\n",
+ u.displayName(), u.email(), u.phoneNumber(), statusEmoji);
+ });
+
+ System.out.println("\n[CHANNEL INFO TABLE]");
+ System.out.printf("%-18s | %-16s | %-12s | %-20s\n", "Name", "Type (Access)", "Participants", "Last Activity");
+ System.out.println("-".repeat(85));
+
+ // 과제 요구사항: 특정 유저 권한에 따른 채널 목록 필터링 조회
+ cs.findAllByUserId(viewerId).forEach(c -> {
+ String accessType = c.type() + (c.isPrivate() ? " (Private)" : " (Public)");
+ String pStr = c.isPrivate() ? c.participantUserIds().size() + "명" : "전체";
+
+ System.out.printf("%-18s | %-16s | %-12s | %-20s\n",
+ c.name(), accessType, pStr,
+ c.lastMessageAt() != null ? timeFormat.format(c.lastMessageAt()) : "(기록 없음)");
+ });
+ }
+
+ private static void printMessageHistory(UUID channelId, MessageService ms, ChatManager cm) {
+ System.out.println("\n[MESSAGE LOG]");
+ List msgs = ms.findAllByChannelId(channelId);
+ if (msgs.isEmpty()) {
+ System.out.println("(출력할 메시지가 없습니다)");
+ } else {
+ for (MessageDto.Response m : msgs) {
+ System.out.printf("[%s] %-10s : %s\n",
+ timeFormat.format(m.createdAt()), cm.getAuthorName(m.id()), m.content());
+ }
+ }
+ System.out.println("------------------------------------------");
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/README.md b/discodeit/src/main/java/com/sprint/mission/discodeit/README.md
new file mode 100644
index 00000000..48f7f6d4
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/README.md
@@ -0,0 +1,41 @@
+# Discodeit Sprint 3 - Spring Boot Migration & Status Management
+
+## 1. 전체 구조 설명 (Spring-Based 4-Layered Architecture)
+기존 Java 프로젝트를 **Spring Boot 3.4.0** 환경으로 마이그레이션하며, 객체 관리 및 의존성 주입을 Spring IoC 컨테이너에 위임하여 결합도를 낮추고 확장성을 높였습니다.
+
+* **Entity 계층**: UUID 기반 참조를 유지하며, 시간 필드 타입을 `Instant`로 통일하여 정밀도를 확보
+* **Repository 계층**: `discodeit.repository.type` 설정에 따라 JCF(Memory) 또는 File 저장소를 조건부 빈(@Conditional)으로 등록
+* **Service 계층**: 비즈니스 로직 수행 및 DTO 변환을 담당하며, `@RequiredArgsConstructor`를 통한 생성자 주입 방식 채택
+* **Manager 계층**: 서비스 간 조합을 통해 '메시지 전송 시 유저 상태 갱신'과 같은 고수준 비즈니스 프로세스 처리
+
+## 2. 주요 도메인 및 필드 (Sprint 3 확장)
+
+| 구분 | 이름 | 주요 고도화 내용 |
+| :--- | :--- | :--- |
+| **UserStatus** | 신규 도메인 | 마지막 접속 시간을 기록하여 **5분 이내 활동 시 ONLINE** 판정 |
+| **ReadStatus** | 신규 도메인 | 사용자의 채널별 마지막 메시지 읽음 상태 관리 |
+| **BinaryContent** | 신규 도메인 | 프로필 이미지, 메시지 첨부파일 등 바이너리 데이터 관리 (수정 불가 모델) |
+| **User** | 기존 확장 | 프로필 이미지(BinaryContent) 연동 및 DTO에서 패스워드 필드 격리 |
+| **Channel** | 기존 확장 | PRIVATE/PUBLIC 생성 로직 분리 및 최근 메시지 시간 정보 포함 |
+
+## 3. 핵심 기술 적용 사항
+
+### 1) Spring Framework & IoC/DI
+* **IoC 컨테이너 활용**: `ServiceFactory`를 제거하고 Spring Context가 Bean의 생명주기를 관리하도록 리팩토링
+* **Dependency Injection**: `@Service`, `@Repository`, `@Component` 어노테이션을 사용하여 빈을 등록하고 의존성을 자동으로 주입
+* **Lombok 적용**: `@Getter`, `@RequiredArgsConstructor` 등을 활용하여 보일러플레이트 코드를 제거하고 가독성 향상
+
+### 2) 비즈니스 로직 고도화
+* **시간 타입 표준화**: 모든 시간 필드를 `Instant`로 변경하여 가독성 및 시간대(Time Zone) 연산 효율성 확보
+* **DTO 기반 데이터 전송**: 엔티티 내부 정보를 보호하기 위해 응답 시 `UserDto.Response`, `ChannelDto.Response` 등을 활용하고 보안상 민감한 패스워드는 완전 제외
+* **활동 기반 상태 업데이트**: `updateByUserId` 기능을 통해 유저가 로그인하거나 메시지를 작성할 때마다 접속 시점을 실시간 갱신
+
+## 4. 저장소 관리 (심화 요구사항)
+`application.yaml` 설정을 통해 실행 시점에 저장소 타입을 동적으로 결정할 수 있도록 설계했습니다.
+
+* **Dynamic Repository Loading**:
+ ```yaml
+ discodeit:
+ repository:
+ type: file # jcf (메모리) 또는 file (직렬화 파일) 선택
+ file-directory: .discodeit # File 저장소 사용 시 저장 경로 설정
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/config/RepositoryConfig.java b/discodeit/src/main/java/com/sprint/mission/discodeit/config/RepositoryConfig.java
new file mode 100644
index 00000000..353d15af
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/config/RepositoryConfig.java
@@ -0,0 +1,92 @@
+package com.sprint.mission.discodeit.config;
+
+import com.sprint.mission.discodeit.repository.*;
+import com.sprint.mission.discodeit.repository.file.*;
+import com.sprint.mission.discodeit.repository.jcf.*;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RepositoryConfig {
+ @Value("${discodeit.repository.file-directory}")
+ private String fileDirectory;
+ // --- User ---
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public UserRepository jcfUserRepository() {
+ return new JCFUserRepository();
+ }
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public UserRepository fileUserRepository() {
+ return new FileUserRepository(fileDirectory + "/users.txt");
+ }
+
+ // --- Channel ---
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public ChannelRepository jcfChannelRepository() {
+ return new JCFChannelRepository();
+ }
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public ChannelRepository fileChannelRepository() {
+ return new FileChannelRepository(fileDirectory + "/channels.txt");
+ }
+
+ // --- Message ---
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public MessageRepository jcfMessageRepository() {
+ return new JCFMessageRepository();
+ }
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public MessageRepository fileMessageRepository() {
+ return new FileMessageRepository(fileDirectory + "/messages.txt");
+ }
+
+ // --- UserStatus ---
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public UserStatusRepository jcfUserStatusRepository() {
+ return new JCFUserStatusRepository();
+ }
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public UserStatusRepository fileUserStatusRepository() {
+ return new FileUserStatusRepository(fileDirectory + "/user-status.txt");
+ }
+
+ // --- ReadStatus ---
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public ReadStatusRepository jcfReadStatusRepository() {
+ return new JCFReadStatusRepository();
+ }
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public ReadStatusRepository fileReadStatusRepository() {
+ return new FileReadStatusRepository(fileDirectory + "/read-status.txt");
+ }
+
+ // --- BinaryContent ---
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "jcf", matchIfMissing = true)
+ public BinaryContentRepository jcfBinaryContentRepository() {
+ return new JCFBinaryContentRepository();
+ }
+
+ @Bean
+ @ConditionalOnProperty(name = "discodeit.repository.type", havingValue = "file")
+ public BinaryContentRepository fileBinaryContentRepository() {
+ return new FileBinaryContentRepository(fileDirectory + "/binary-contents.txt");
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/AuthDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/AuthDto.java
new file mode 100644
index 00000000..51fa8f1b
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/AuthDto.java
@@ -0,0 +1,8 @@
+package com.sprint.mission.discodeit.dto;
+
+public interface AuthDto {
+ record LoginRequest(
+ String email,
+ String password
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/BinaryContentDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/BinaryContentDto.java
new file mode 100644
index 00000000..dbce29ae
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/BinaryContentDto.java
@@ -0,0 +1,19 @@
+package com.sprint.mission.discodeit.dto;
+
+import java.util.UUID;
+
+public interface BinaryContentDto {
+ record CreateRequest(
+ byte[] bytes, // 실제 파일 데이터
+ String contentType, // 파일 형식 (image/png 등)
+ String fileName, // 파일 이름
+ Long fileSize
+ ) {}
+
+ record Response(
+ UUID id,
+ String contentType,
+ String fileName,
+ Long fileSize
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ChannelDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ChannelDto.java
new file mode 100644
index 00000000..92bf04c9
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ChannelDto.java
@@ -0,0 +1,31 @@
+package com.sprint.mission.discodeit.dto;
+
+import com.sprint.mission.discodeit.entity.ChannelType; // [추가]
+import java.time.Instant;
+import java.util.List;
+import java.util.UUID;
+
+public interface ChannelDto {
+ record CreatePublicRequest(
+ String name,
+ String description,
+ ChannelType type
+ ) {}
+
+ record CreatePrivateRequest(
+ String name,
+ String description,
+ ChannelType type,
+ List participantUserIds
+ ) {}
+
+ record Response(
+ UUID id,
+ String name,
+ String description,
+ String type,
+ Instant lastMessageAt,
+ List participantUserIds,
+ boolean isPrivate
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/MessageDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/MessageDto.java
new file mode 100644
index 00000000..2cf3d753
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/MessageDto.java
@@ -0,0 +1,24 @@
+package com.sprint.mission.discodeit.dto;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.UUID;
+
+public interface MessageDto {
+ record CreateRequest(
+ String content,
+ UUID authorId,
+ UUID channelId,
+ List attachmentIds
+ ) {}
+
+ record Response(
+ UUID id,
+ String content,
+ UUID authorId,
+ UUID channelId,
+ List attachmentIds,
+ Instant createdAt,
+ Instant updatedAt
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ReadStatusDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ReadStatusDto.java
new file mode 100644
index 00000000..88c0e4bd
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/ReadStatusDto.java
@@ -0,0 +1,17 @@
+package com.sprint.mission.discodeit.dto;
+
+import java.util.UUID;
+
+public interface ReadStatusDto {
+
+ record CreateRequest(
+ UUID userId, // 읽은 유저 ID
+ UUID channelId // 읽은 채널 ID
+ ) {}
+
+ record Response(
+ UUID id,
+ UUID userId,
+ UUID channelId
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserDto.java
new file mode 100644
index 00000000..22488775
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserDto.java
@@ -0,0 +1,29 @@
+package com.sprint.mission.discodeit.dto;
+
+import java.util.UUID;
+
+public interface UserDto {
+ record CreateRequest(
+ String displayName,
+ String email,
+ String password,
+ String phoneNumber,
+ UUID profileId
+ ) {}
+
+ record UpdateRequest(
+ String displayName,
+ String email,
+ String phoneNumber,
+ UUID profileId
+ ) {}
+
+ record Response(
+ UUID id,
+ String displayName,
+ String email,
+ boolean isOnline,
+ UUID profileId,
+ String phoneNumber
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserStatusDto.java b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserStatusDto.java
new file mode 100644
index 00000000..2499d480
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/dto/UserStatusDto.java
@@ -0,0 +1,16 @@
+package com.sprint.mission.discodeit.dto;
+
+import java.time.Instant;
+import java.util.UUID;
+
+public interface UserStatusDto {
+ record UpdateRequest(
+ Instant lastAccessedAt
+ ) {}
+
+ record Response(
+ UUID id,
+ UUID userId,
+ Instant lastAccessedAt
+ ) {}
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BaseEntity.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BaseEntity.java
new file mode 100644
index 00000000..99a0630a
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BaseEntity.java
@@ -0,0 +1,28 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.ToString;
+import java.io.Serializable;
+import java.time.Instant;
+import java.util.UUID;
+
+@Getter
+@ToString
+public abstract class BaseEntity implements Serializable {
+ private static final long serialVersionUID = 1L;
+
+ protected UUID id;
+ protected Instant createdAt;
+ protected Instant updatedAt;
+
+ public BaseEntity() {
+ this.id = UUID.randomUUID();
+ Instant now = Instant.now();
+ this.createdAt = now;
+ this.updatedAt = now;
+ }
+
+ public void recordUpdate() {
+ this.updatedAt = Instant.now();
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BinaryContent.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BinaryContent.java
new file mode 100644
index 00000000..c0161757
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/BinaryContent.java
@@ -0,0 +1,24 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+@Getter
+@ToString(callSuper = true)
+@NoArgsConstructor
+public class BinaryContent extends BaseEntity {
+
+ private byte[] bytes;
+ private String contentType;
+ private String fileName;
+ private Long fileSize;
+
+ public BinaryContent(byte[] bytes, String contentType, String fileName, Long fileSize) {
+ super();
+ this.bytes = bytes;
+ this.contentType = contentType;
+ this.fileName = fileName;
+ this.fileSize = fileSize;
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Channel.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Channel.java
new file mode 100644
index 00000000..8aba86d7
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Channel.java
@@ -0,0 +1,42 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+
+import java.util.List;
+import java.util.ArrayList;
+import java.util.UUID;
+
+@Getter
+@Setter
+@ToString(callSuper = true)
+public class Channel extends BaseEntity {
+ private String name;
+ private ChannelType type;
+ private String description;
+ private boolean isPrivate;
+
+ private List participantUserIds = new ArrayList<>();
+
+ public Channel(String name, ChannelType type, String description, boolean isPrivate) {
+ super();
+ this.name = name;
+ this.type = type;
+ this.description = description;
+ this.isPrivate = isPrivate;
+ }
+
+ public Channel(String name, ChannelType type, boolean isPrivate) {
+ this(name, type, null, isPrivate);
+ }
+
+ public void update(String name, String description) {
+ if (this.isPrivate) {
+ throw new IllegalStateException("PRIVATE 채널 정보는 수정할 수 없습니다.");
+ }
+ this.name = name;
+ this.description = description;
+ recordUpdate();
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ChannelType.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ChannelType.java
new file mode 100644
index 00000000..1d0e33d6
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ChannelType.java
@@ -0,0 +1,8 @@
+package com.sprint.mission.discodeit.entity;
+
+import java.io.Serializable;
+
+public enum ChannelType implements Serializable {
+ TEXT,
+ VOICE
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Message.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Message.java
new file mode 100644
index 00000000..50dcacbd
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/Message.java
@@ -0,0 +1,28 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+@Getter
+@Setter
+@ToString(callSuper = true)
+@NoArgsConstructor
+public class Message extends BaseEntity {
+ private String content;
+ private UUID authorId;
+ private UUID channelId;
+
+ private List attachmentIds = new ArrayList<>();
+
+ public Message(String content, UUID authorId, UUID channelId) {
+ super();
+ this.content = content;
+ this.authorId = authorId;
+ this.channelId = channelId;
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ReadStatus.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ReadStatus.java
new file mode 100644
index 00000000..49b715c6
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/ReadStatus.java
@@ -0,0 +1,22 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import java.util.UUID;
+
+@Getter
+@Setter
+@ToString(callSuper = true)
+@NoArgsConstructor
+public class ReadStatus extends BaseEntity {
+ private UUID userId; // 유저 ID
+ private UUID channelId; // 채널 ID
+
+ public ReadStatus(UUID userId, UUID channelId) {
+ super();
+ this.userId = userId;
+ this.channelId = channelId;
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/User.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/User.java
new file mode 100644
index 00000000..f2a0941d
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/User.java
@@ -0,0 +1,28 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import java.util.UUID;
+
+@Getter
+@Setter
+@ToString(callSuper = true)
+@NoArgsConstructor
+public class User extends BaseEntity {
+ private String displayName;
+ private String email;
+ private String password;
+ private String phoneNumber;
+ private UUID profileId;
+
+ public User(String displayName, String email, String password, String phoneNumber, UUID profileId) {
+ super();
+ this.displayName = displayName;
+ this.email = email;
+ this.password = password;
+ this.phoneNumber = phoneNumber;
+ this.profileId = profileId;
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/entity/UserStatus.java b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/UserStatus.java
new file mode 100644
index 00000000..e159f316
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/entity/UserStatus.java
@@ -0,0 +1,32 @@
+package com.sprint.mission.discodeit.entity;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import java.time.Instant;
+import java.util.UUID;
+
+@Getter
+@Setter
+@ToString(callSuper = true)
+@NoArgsConstructor
+public class UserStatus extends BaseEntity {
+ private UUID userId;
+ private Instant lastAccessedAt;
+
+ public UserStatus(UUID userId) {
+ super();
+ this.userId = userId;
+ this.lastAccessedAt = Instant.now();
+ }
+ public boolean isOnline() {
+ if (this.lastAccessedAt == null) return false;
+ return lastAccessedAt.isAfter(Instant.now().minusSeconds(300)); // 300초 = 5분
+ }
+
+ public void updateLastAccessedAt() {
+ this.lastAccessedAt = Instant.now();
+ this.recordUpdate();
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/manager/ChatManager.java b/discodeit/src/main/java/com/sprint/mission/discodeit/manager/ChatManager.java
new file mode 100644
index 00000000..03e46075
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/manager/ChatManager.java
@@ -0,0 +1,10 @@
+package com.sprint.mission.discodeit.manager;
+
+import com.sprint.mission.discodeit.dto.MessageDto;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface ChatManager {
+ String getAuthorName(UUID messageId);
+ Optional sendMessage(UUID userId, UUID channelId, String content);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/manager/DiscordManager.java b/discodeit/src/main/java/com/sprint/mission/discodeit/manager/DiscordManager.java
new file mode 100644
index 00000000..bab5477f
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/manager/DiscordManager.java
@@ -0,0 +1,48 @@
+package com.sprint.mission.discodeit.manager;
+
+import com.sprint.mission.discodeit.dto.MessageDto;
+import com.sprint.mission.discodeit.service.ChannelService;
+import com.sprint.mission.discodeit.service.MessageService;
+import com.sprint.mission.discodeit.service.UserService;
+import com.sprint.mission.discodeit.service.UserStatusService; // [추가]
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import java.util.ArrayList;
+import java.util.Optional;
+import java.util.UUID;
+
+@Component
+@RequiredArgsConstructor
+public class DiscordManager implements ChatManager {
+ private final UserService userService;
+ private final ChannelService channelService;
+ private final MessageService messageService;
+ private final UserStatusService userStatusService; // [추가] 주입
+
+ @Override
+ public Optional sendMessage(UUID userId, UUID channelId, String content) {
+ if (userService.findById(userId).isEmpty()) {
+ return Optional.empty();
+ }
+
+ if (channelService.findById(channelId).isEmpty()) {
+ return Optional.empty();
+ }
+
+ userStatusService.updateByUserId(userId);
+
+ MessageDto.CreateRequest request = new MessageDto.CreateRequest(
+ content, userId, channelId, new ArrayList<>()
+ );
+
+ return Optional.of(messageService.send(request));
+ }
+
+ @Override
+ public String getAuthorName(UUID messageId) {
+ return messageService.findById(messageId)
+ .flatMap(msg -> userService.findById(msg.authorId()))
+ .map(res -> res.displayName())
+ .orElse("Unknown");
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/BinaryContentRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/BinaryContentRepository.java
new file mode 100644
index 00000000..f919f3e2
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/BinaryContentRepository.java
@@ -0,0 +1,13 @@
+package com.sprint.mission.discodeit.repository;
+
+import com.sprint.mission.discodeit.entity.BinaryContent;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface BinaryContentRepository {
+ void save(BinaryContent binaryContent);
+ Optional findById(UUID id);
+ List findAllByIdIn(List ids);
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ChannelRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ChannelRepository.java
new file mode 100644
index 00000000..c6016fec
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ChannelRepository.java
@@ -0,0 +1,15 @@
+package com.sprint.mission.discodeit.repository;
+
+import com.sprint.mission.discodeit.entity.Channel;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface ChannelRepository {
+ void save(Channel channel);
+ Optional findById(UUID id);
+ Optional findByName(String name);
+ List findAll();
+ List findAllByUserId(UUID userId);
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/MessageRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/MessageRepository.java
new file mode 100644
index 00000000..5e440de9
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/MessageRepository.java
@@ -0,0 +1,15 @@
+package com.sprint.mission.discodeit.repository;
+
+import com.sprint.mission.discodeit.entity.Message;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface MessageRepository {
+ void save(Message message);
+ Optional findById(UUID id);
+ List findAll();
+ List findByChannelId(UUID channelId); // 채널별 메시지 조회용
+ Optional findLatestByChannelId(UUID channelId);
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ReadStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ReadStatusRepository.java
new file mode 100644
index 00000000..43e565a9
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/ReadStatusRepository.java
@@ -0,0 +1,13 @@
+package com.sprint.mission.discodeit.repository;
+import com.sprint.mission.discodeit.entity.ReadStatus;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface ReadStatusRepository {
+ void save(ReadStatus readStatus);
+ Optional findById(UUID id);
+ List findAllByUserId(UUID userId);
+ Optional findByUserIdAndChannelId(UUID userId, UUID channelId);
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserRepository.java
new file mode 100644
index 00000000..83021d71
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserRepository.java
@@ -0,0 +1,16 @@
+// UserRepository.java
+package com.sprint.mission.discodeit.repository;
+
+import com.sprint.mission.discodeit.entity.User;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface UserRepository {
+ void save(User user);
+ Optional findById(UUID id);
+ Optional findByDisplayName(String displayName);
+ Optional findByEmail(String email);
+ List findAll();
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserStatusRepository.java
new file mode 100644
index 00000000..7ad802ef
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/UserStatusRepository.java
@@ -0,0 +1,14 @@
+package com.sprint.mission.discodeit.repository;
+
+import com.sprint.mission.discodeit.entity.UserStatus;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface UserStatusRepository {
+ void save(UserStatus userStatus);
+ Optional findById(UUID id);
+ Optional findByUserId(UUID userId);
+ List findAll();
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileBinaryContentRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileBinaryContentRepository.java
new file mode 100644
index 00000000..bd1ba39f
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileBinaryContentRepository.java
@@ -0,0 +1,72 @@
+package com.sprint.mission.discodeit.repository.file;
+
+import com.sprint.mission.discodeit.entity.BinaryContent;
+import com.sprint.mission.discodeit.repository.BinaryContentRepository;
+import java.io.*;
+import java.util.*;
+
+public class FileBinaryContentRepository implements BinaryContentRepository {
+
+ private final String filePath;
+ private Map contentMap;
+
+ public FileBinaryContentRepository(String filePath) {
+ this.filePath = filePath;
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.contentMap = loadData();
+ }
+
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileBinaryContentRepository Error] 로드 실패: " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(contentMap);
+ } catch (IOException e) {
+ System.err.println("[FileBinaryContentRepository Error] 저장 실패: " + e.getMessage());
+ }
+ }
+
+ @Override
+ public void save(BinaryContent binaryContent) {
+ contentMap.put(binaryContent.getId(), binaryContent);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(contentMap.get(id));
+ }
+
+ @Override
+ public List findAllByIdIn(List ids) {
+ List result = new ArrayList<>();
+ for (BinaryContent content : contentMap.values()) {
+ if (ids.contains(content.getId())) {
+ result.add(content);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (contentMap.remove(id) != null) {
+ saveData();
+ }
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileChannelRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileChannelRepository.java
new file mode 100644
index 00000000..2d561c15
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileChannelRepository.java
@@ -0,0 +1,86 @@
+package com.sprint.mission.discodeit.repository.file;
+
+import com.sprint.mission.discodeit.entity.Channel;
+import com.sprint.mission.discodeit.repository.ChannelRepository;
+import java.io.*;
+import java.util.*;
+
+public class FileChannelRepository implements ChannelRepository {
+
+ private final String filePath;
+ private Map channelMap;
+ public FileChannelRepository(String filePath) {
+ this.filePath = filePath;
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.channelMap = loadData();
+ }
+
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileChannelRepository Error] 로드 실패: " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(channelMap);
+ } catch (IOException e) {
+ System.err.println("[FileChannelRepository Error] 저장 실패: " + e.getMessage());
+ }
+ }
+
+ @Override
+ public void save(Channel channel) {
+ channelMap.put(channel.getId(), channel);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(channelMap.get(id));
+ }
+
+ @Override
+ public Optional findByName(String name) {
+ for (Channel channel : channelMap.values()) {
+ if (channel.getName().equals(name)) {
+ return Optional.of(channel);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(channelMap.values());
+ }
+
+ @Override
+ public List findAllByUserId(UUID userId) {
+ List result = new ArrayList<>();
+ for (Channel channel : channelMap.values()) {
+ if (channel.getParticipantUserIds().contains(userId)) {
+ result.add(channel);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (channelMap.remove(id) != null) {
+ saveData();
+ }
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileMessageRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileMessageRepository.java
new file mode 100644
index 00000000..7dfbad84
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileMessageRepository.java
@@ -0,0 +1,88 @@
+package com.sprint.mission.discodeit.repository.file;
+
+import com.sprint.mission.discodeit.entity.Message;
+import com.sprint.mission.discodeit.repository.MessageRepository;
+import java.io.*;
+import java.util.*;
+
+public class FileMessageRepository implements MessageRepository {
+ private final String filePath;
+ private Map messageMap;
+ public FileMessageRepository(String filePath) {
+ this.filePath = filePath;
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.messageMap = loadData();
+ }
+
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileMessageRepository Error] 로드 실패: " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(messageMap);
+ } catch (IOException e) {
+ System.err.println("[FileMessageRepository Error] 저장 실패: " + e.getMessage());
+ }
+ }
+
+ @Override
+ public void save(Message message) {
+ messageMap.put(message.getId(), message);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(messageMap.get(id));
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(messageMap.values());
+ }
+
+ @Override
+ public List findByChannelId(UUID channelId) {
+ List result = new ArrayList<>();
+ for (Message m : messageMap.values()) {
+ if (m.getChannelId().equals(channelId)) {
+ result.add(m);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public Optional findLatestByChannelId(UUID channelId) {
+ Message latest = null;
+ for (Message message : messageMap.values()) {
+ if (message.getChannelId().equals(channelId)) {
+ if (latest == null || message.getCreatedAt().isAfter(latest.getCreatedAt())) {
+ latest = message;
+ }
+ }
+ }
+ return Optional.ofNullable(latest);
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (messageMap.remove(id) != null) {
+ saveData();
+ }
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileReadStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileReadStatusRepository.java
new file mode 100644
index 00000000..4cbfd32b
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileReadStatusRepository.java
@@ -0,0 +1,80 @@
+package com.sprint.mission.discodeit.repository.file;
+
+import com.sprint.mission.discodeit.entity.ReadStatus;
+import com.sprint.mission.discodeit.repository.ReadStatusRepository;
+import java.io.*;
+import java.util.*;
+public class FileReadStatusRepository implements ReadStatusRepository {
+
+ private final String filePath;
+ private Map store;
+ public FileReadStatusRepository(String filePath) {
+ this.filePath = filePath;
+
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.store = loadData();
+ }
+
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileReadStatusRepository Error] 로드 실패: " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(store);
+ } catch (IOException e) {
+ System.err.println("[FileReadStatusRepository Error] 저장 실패: " + e.getMessage());
+ }
+ }
+ @Override
+ public void save(ReadStatus readStatus) {
+ store.put(readStatus.getId(), readStatus);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(store.get(id));
+ }
+
+ @Override
+ public List findAllByUserId(UUID userId) {
+ List result = new ArrayList<>();
+ for (ReadStatus rs : store.values()) {
+ if (rs.getUserId().equals(userId)) {
+ result.add(rs);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public Optional findByUserIdAndChannelId(UUID userId, UUID channelId) {
+ for (ReadStatus rs : store.values()) {
+ if (rs.getUserId().equals(userId) && rs.getChannelId().equals(channelId)) {
+ return Optional.of(rs);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (store.remove(id) != null) {
+ saveData();
+ }
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserRepository.java
new file mode 100644
index 00000000..646fa47a
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserRepository.java
@@ -0,0 +1,82 @@
+package com.sprint.mission.discodeit.repository.file;
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.repository.UserRepository;
+import java.io.*;
+import java.util.*;
+public class FileUserRepository implements UserRepository {
+
+ private final String filePath;
+ private Map userMap;
+ public FileUserRepository(String filePath) {
+ this.filePath = filePath;
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.userMap = loadData();
+ }
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileRepository Error] Failed to load data from " + filePath + ": " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(userMap);
+ } catch (IOException e) {
+ System.err.println("[FileRepository Error] Failed to save data to " + filePath + ": " + e.getMessage());
+ }
+ }
+
+ @Override
+ public void save(User user) {
+ userMap.put(user.getId(), user);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(userMap.get(id));
+ }
+
+ @Override
+ public Optional findByDisplayName(String displayName) {
+ for (User user : userMap.values()) {
+ if (user.getDisplayName().equals(displayName)) {
+ return Optional.of(user);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public Optional findByEmail(String email) {
+ for (User user : userMap.values()) {
+ if (user.getEmail().equals(email)) {
+ return Optional.of(user);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(userMap.values());
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (userMap.remove(id) != null) {
+ saveData();
+ }
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserStatusRepository.java
new file mode 100644
index 00000000..55fb7fe2
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/file/FileUserStatusRepository.java
@@ -0,0 +1,73 @@
+package com.sprint.mission.discodeit.repository.file;
+
+import com.sprint.mission.discodeit.entity.UserStatus;
+import com.sprint.mission.discodeit.repository.UserStatusRepository;
+import java.io.*;
+import java.util.*;
+
+public class FileUserStatusRepository implements UserStatusRepository {
+ private final String filePath; // [수정] 변수로 변경
+ private Map statusMap;
+ public FileUserStatusRepository(String filePath) {
+ this.filePath = filePath;
+
+ File file = new File(filePath);
+ File parentDir = file.getParentFile();
+ if (parentDir != null && !parentDir.exists()) {
+ parentDir.mkdirs();
+ }
+
+ this.statusMap = loadData();
+ }
+
+ @SuppressWarnings("unchecked")
+ private Map loadData() {
+ File file = new File(this.filePath);
+ if (!file.exists()) return new HashMap<>();
+ try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
+ return (Map) ois.readObject();
+ } catch (IOException | ClassNotFoundException e) {
+ System.err.println("[FileUserStatusRepository Error] 로드 실패: " + e.getMessage());
+ return new HashMap<>();
+ }
+ }
+
+ private void saveData() {
+ try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(this.filePath))) {
+ oos.writeObject(statusMap);
+ } catch (IOException e) {
+ System.err.println("[FileUserStatusRepository Error] 저장 실패: " + e.getMessage());
+ }
+ }
+
+ @Override
+ public void save(UserStatus userStatus) {
+ statusMap.put(userStatus.getId(), userStatus);
+ saveData();
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(statusMap.get(id));
+ }
+
+ @Override
+ public Optional findByUserId(UUID userId) {
+ for (UserStatus s : statusMap.values()) {
+ if (s.getUserId().equals(userId)) {
+ return Optional.of(s);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(statusMap.values());
+ }
+
+ @Override
+ public void delete(UUID id) {
+ if (statusMap.remove(id) != null) saveData();
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFBinaryContentRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFBinaryContentRepository.java
new file mode 100644
index 00000000..47ef9677
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFBinaryContentRepository.java
@@ -0,0 +1,35 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.BinaryContent;
+import com.sprint.mission.discodeit.repository.BinaryContentRepository;
+import java.util.*;
+
+public class JCFBinaryContentRepository implements BinaryContentRepository {
+ private final Map binaryContentMap = new HashMap<>();
+
+ @Override
+ public void save(BinaryContent binaryContent) {
+ binaryContentMap.put(binaryContent.getId(), binaryContent);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(binaryContentMap.get(id));
+ }
+
+ @Override
+ public List findAllByIdIn(List ids) {
+ List result = new ArrayList<>();
+ for (BinaryContent content : binaryContentMap.values()) {
+ if (ids.contains(content.getId())) {
+ result.add(content);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public void delete(UUID id) {
+ binaryContentMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFChannelRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFChannelRepository.java
new file mode 100644
index 00000000..24bbd3d5
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFChannelRepository.java
@@ -0,0 +1,50 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.Channel;
+import com.sprint.mission.discodeit.repository.ChannelRepository;
+import java.util.*;
+
+public class JCFChannelRepository implements ChannelRepository {
+ private final Map channelMap = new HashMap<>();
+
+ @Override
+ public void save(Channel channel) {
+ channelMap.put(channel.getId(), channel);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(channelMap.get(id));
+ }
+
+ @Override
+ public Optional findByName(String name) {
+ for (Channel channel : channelMap.values()) {
+ if (channel.getName().equals(name)) {
+ return Optional.of(channel);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(channelMap.values());
+ }
+
+ @Override
+ public List findAllByUserId(UUID userId) {
+ List result = new ArrayList<>();
+ for (Channel channel : channelMap.values()) {
+ if (channel.getParticipantUserIds().contains(userId)) {
+ result.add(channel);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public void delete(UUID id) {
+ channelMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFMessageRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFMessageRepository.java
new file mode 100644
index 00000000..69b71735
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFMessageRepository.java
@@ -0,0 +1,53 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.Message;
+import com.sprint.mission.discodeit.repository.MessageRepository;
+import java.util.*;
+
+public class JCFMessageRepository implements MessageRepository {
+ private final Map messageMap = new HashMap<>();
+
+ @Override
+ public void save(Message message) {
+ messageMap.put(message.getId(), message);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(messageMap.get(id));
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(messageMap.values());
+ }
+
+ @Override
+ public List findByChannelId(UUID channelId) {
+ List result = new ArrayList<>();
+ for (Message message : messageMap.values()) {
+ if (message.getChannelId().equals(channelId)) {
+ result.add(message);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public Optional findLatestByChannelId(UUID channelId) {
+ Message latest = null;
+ for (Message message : messageMap.values()) {
+ if (message.getChannelId().equals(channelId)) {
+ if (latest == null || message.getCreatedAt().isAfter(latest.getCreatedAt())) {
+ latest = message;
+ }
+ }
+ }
+ return Optional.ofNullable(latest);
+ }
+
+ @Override
+ public void delete(UUID id) {
+ messageMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFReadStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFReadStatusRepository.java
new file mode 100644
index 00000000..da695728
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFReadStatusRepository.java
@@ -0,0 +1,45 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.ReadStatus;
+import com.sprint.mission.discodeit.repository.ReadStatusRepository;
+import java.util.*;
+
+public class JCFReadStatusRepository implements ReadStatusRepository {
+ private final Map readStatusMap = new HashMap<>();
+
+ @Override
+ public void save(ReadStatus readStatus) {
+ readStatusMap.put(readStatus.getId(), readStatus);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(readStatusMap.get(id));
+ }
+
+ @Override
+ public List findAllByUserId(UUID userId) {
+ List result = new ArrayList<>();
+ for (ReadStatus rs : readStatusMap.values()) {
+ if (rs.getUserId().equals(userId)) {
+ result.add(rs);
+ }
+ }
+ return result;
+ }
+
+ @Override
+ public Optional findByUserIdAndChannelId(UUID userId, UUID channelId) {
+ for (ReadStatus rs : readStatusMap.values()) {
+ if (rs.getUserId().equals(userId) && rs.getChannelId().equals(channelId)) {
+ return Optional.of(rs);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public void delete(UUID id) {
+ readStatusMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserRepository.java
new file mode 100644
index 00000000..fe8a2422
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserRepository.java
@@ -0,0 +1,49 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.repository.UserRepository;
+import java.util.*;
+
+public class JCFUserRepository implements UserRepository {
+ private final Map userMap = new HashMap<>();
+
+ @Override
+ public void save(User user) {
+ userMap.put(user.getId(), user);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(userMap.get(id));
+ }
+
+ @Override
+ public Optional findByDisplayName(String displayName) {
+ for (User user : userMap.values()) {
+ if (user.getDisplayName().equals(displayName)) {
+ return Optional.of(user);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public Optional findByEmail(String email) {
+ for (User user : userMap.values()) {
+ if (user.getEmail().equals(email)) {
+ return Optional.of(user);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(userMap.values());
+ }
+
+ @Override
+ public void delete(UUID id) {
+ userMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserStatusRepository.java b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserStatusRepository.java
new file mode 100644
index 00000000..10b5d417
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/repository/jcf/JCFUserStatusRepository.java
@@ -0,0 +1,39 @@
+package com.sprint.mission.discodeit.repository.jcf;
+
+import com.sprint.mission.discodeit.entity.UserStatus;
+import com.sprint.mission.discodeit.repository.UserStatusRepository;
+import java.util.*;
+
+public class JCFUserStatusRepository implements UserStatusRepository {
+ private final Map userStatusMap = new HashMap<>();
+
+ @Override
+ public void save(UserStatus userStatus) {
+ userStatusMap.put(userStatus.getId(), userStatus);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return Optional.ofNullable(userStatusMap.get(id));
+ }
+
+ @Override
+ public Optional findByUserId(UUID userId) {
+ for (UserStatus status : userStatusMap.values()) {
+ if (status.getUserId().equals(userId)) {
+ return Optional.of(status);
+ }
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public List findAll() {
+ return new ArrayList<>(userStatusMap.values());
+ }
+
+ @Override
+ public void delete(UUID id) {
+ userStatusMap.remove(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/AuthService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/AuthService.java
new file mode 100644
index 00000000..0d82ff1e
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/AuthService.java
@@ -0,0 +1,8 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.dto.AuthDto;
+import com.sprint.mission.discodeit.dto.UserDto;
+
+public interface AuthService {
+ UserDto.Response login(AuthDto.LoginRequest request);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/BinaryContentService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/BinaryContentService.java
new file mode 100644
index 00000000..f4574c97
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/BinaryContentService.java
@@ -0,0 +1,14 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.entity.BinaryContent;
+import com.sprint.mission.discodeit.dto.BinaryContentDto;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface BinaryContentService {
+ BinaryContent create(BinaryContentDto.CreateRequest request);
+ Optional findById(UUID id);
+ List findAllByIdIn(List ids);
+ void delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/ChannelService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/ChannelService.java
new file mode 100644
index 00000000..fa0a0ad5
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/ChannelService.java
@@ -0,0 +1,15 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.dto.ChannelDto;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface ChannelService {
+ Optional createPublicChannel(ChannelDto.CreatePublicRequest request);
+ Optional createPrivateChannel(ChannelDto.CreatePrivateRequest request);
+ Optional findById(UUID id);
+ List findAllByUserId(UUID userId);
+ Optional update(UUID id, String name, String description);
+ boolean delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/MessageService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/MessageService.java
new file mode 100644
index 00000000..2622911f
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/MessageService.java
@@ -0,0 +1,13 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.dto.MessageDto;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface MessageService {
+ MessageDto.Response send(MessageDto.CreateRequest request);
+ Optional findById(UUID id);
+ List findAllByChannelId(UUID channelId);
+ boolean delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/ReadStatusService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/ReadStatusService.java
new file mode 100644
index 00000000..5af9d6a4
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/ReadStatusService.java
@@ -0,0 +1,10 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.entity.ReadStatus;
+import com.sprint.mission.discodeit.dto.ReadStatusDto;
+import java.util.UUID;
+
+public interface ReadStatusService {
+ ReadStatus create(ReadStatusDto.CreateRequest request);
+ void update(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserService.java
new file mode 100644
index 00000000..4eba014b
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserService.java
@@ -0,0 +1,14 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.dto.UserDto;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface UserService {
+ Optional create(UserDto.CreateRequest request);
+ Optional findById(UUID id);
+ List findAll();
+ Optional update(UUID id, UserDto.UpdateRequest request);
+ boolean delete(UUID id);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserStatusService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserStatusService.java
new file mode 100644
index 00000000..9f93a1cf
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/UserStatusService.java
@@ -0,0 +1,15 @@
+package com.sprint.mission.discodeit.service;
+
+import com.sprint.mission.discodeit.dto.UserStatusDto;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public interface UserStatusService {
+ UserStatusDto.Response create(UUID userId);
+ Optional findByUserId(UUID userId);
+ List findAll();
+ void updateByUserId(UUID userId);
+ void deleteByUserId(UUID userId);
+ boolean isUserOnline(UUID userId);
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicAuthService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicAuthService.java
new file mode 100644
index 00000000..b48e9a2a
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicAuthService.java
@@ -0,0 +1,36 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.AuthDto;
+import com.sprint.mission.discodeit.dto.UserDto;
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.entity.UserStatus;
+import com.sprint.mission.discodeit.repository.UserRepository;
+import com.sprint.mission.discodeit.repository.UserStatusRepository;
+import com.sprint.mission.discodeit.service.AuthService;
+import com.sprint.mission.discodeit.service.UserStatusService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class BasicAuthService implements AuthService {
+ private final UserRepository userRepository;
+ private final UserStatusService userStatusService;
+
+ @Override
+ public UserDto.Response login(AuthDto.LoginRequest request) {
+ User user = userRepository.findAll().stream()
+ .filter(u -> u.getEmail().equals(request.email()) && u.getPassword().equals(request.password()))
+ .findFirst()
+ .orElseThrow(() -> new IllegalArgumentException("아이디 또는 비밀번호가 일치하지 않습니다."));
+ userStatusService.updateByUserId(user.getId());
+ return new UserDto.Response(
+ user.getId(),
+ user.getDisplayName(),
+ user.getEmail(),
+ true,
+ user.getProfileId(),
+ user.getPhoneNumber()
+ );
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicBinaryContentService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicBinaryContentService.java
new file mode 100644
index 00000000..3945af62
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicBinaryContentService.java
@@ -0,0 +1,44 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.BinaryContentDto;
+import com.sprint.mission.discodeit.entity.BinaryContent;
+import com.sprint.mission.discodeit.repository.BinaryContentRepository;
+import com.sprint.mission.discodeit.service.BinaryContentService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class BasicBinaryContentService implements BinaryContentService {
+ private final BinaryContentRepository binaryContentRepository;
+
+ @Override
+ public BinaryContent create(BinaryContentDto.CreateRequest request) {
+ BinaryContent content = new BinaryContent(
+ request.bytes(),
+ request.contentType(),
+ request.fileName(),
+ request.fileSize()
+ );
+ binaryContentRepository.save(content);
+ return content;
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return binaryContentRepository.findById(id);
+ }
+
+ @Override
+ public List findAllByIdIn(List ids) {
+ return binaryContentRepository.findAllByIdIn(ids);
+ }
+
+ @Override
+ public void delete(UUID id) {
+ binaryContentRepository.delete(id);
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicChannelService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicChannelService.java
new file mode 100644
index 00000000..69f526bc
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicChannelService.java
@@ -0,0 +1,93 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.ChannelDto;
+import com.sprint.mission.discodeit.entity.*;
+import com.sprint.mission.discodeit.repository.*;
+import com.sprint.mission.discodeit.service.ChannelService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class BasicChannelService implements ChannelService {
+ private final ChannelRepository channelRepository;
+ private final ReadStatusRepository readStatusRepository;
+ private final MessageRepository messageRepository;
+
+ @Override
+ public Optional createPublicChannel(ChannelDto.CreatePublicRequest request) {
+ Channel channel = new Channel(request.name(), request.type(), request.description(), false);
+ channelRepository.save(channel);
+ return Optional.of(convertToResponse(channel));
+ }
+
+ @Override
+ public Optional createPrivateChannel(ChannelDto.CreatePrivateRequest request) {
+ Channel channel = new Channel(request.name(), request.type(), request.description(), true);
+ channel.setParticipantUserIds(request.participantUserIds());
+ channelRepository.save(channel);
+
+ for (UUID userId : request.participantUserIds()) {
+ readStatusRepository.save(new ReadStatus(userId, channel.getId()));
+ }
+ return Optional.of(convertToResponse(channel));
+ }
+
+ @Override
+ public List findAllByUserId(UUID userId) {
+ List allChannels = channelRepository.findAll();
+ List responses = new ArrayList<>();
+
+ for (Channel channel : allChannels) {
+ boolean isPublic = !channel.isPrivate();
+ boolean isParticipant = channel.getParticipantUserIds().contains(userId);
+ if (isPublic || isParticipant) {
+ responses.add(convertToResponse(channel));
+ }
+ }
+ return responses;
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return channelRepository.findById(id).map(this::convertToResponse);
+ }
+
+ @Override
+ public Optional update(UUID id, String name, String description) {
+ return channelRepository.findById(id).map(channel -> {
+ channel.update(name, description);
+ channelRepository.save(channel);
+ return convertToResponse(channel);
+ });
+ }
+
+ @Override
+ public boolean delete(UUID id) {
+ if (channelRepository.findById(id).isPresent()) {
+ channelRepository.delete(id);
+ return true;
+ }
+ return false;
+ }
+
+ private ChannelDto.Response convertToResponse(Channel channel) {
+ Instant lastAt = messageRepository.findLatestByChannelId(channel.getId())
+ .map(Message::getCreatedAt)
+ .orElse(null);
+ return new ChannelDto.Response(
+ channel.getId(),
+ channel.getName(),
+ channel.getDescription(),
+ channel.getType().name(),
+ lastAt,
+ channel.getParticipantUserIds(),
+ channel.isPrivate()
+ );
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicMessageService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicMessageService.java
new file mode 100644
index 00000000..c80e1e76
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicMessageService.java
@@ -0,0 +1,73 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.MessageDto;
+import com.sprint.mission.discodeit.entity.Message;
+import com.sprint.mission.discodeit.repository.MessageRepository;
+import com.sprint.mission.discodeit.repository.BinaryContentRepository;
+import com.sprint.mission.discodeit.service.MessageService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class BasicMessageService implements MessageService {
+ private final MessageRepository messageRepository;
+ private final BinaryContentRepository binaryContentRepository;
+
+ @Override
+ public MessageDto.Response send(MessageDto.CreateRequest request) {
+ Message message = new Message(request.content(), request.authorId(), request.channelId());
+ if (request.attachmentIds() != null) {
+ List attachments = new ArrayList<>();
+ for (UUID id : request.attachmentIds()) {
+ attachments.add(id);
+ }
+ message.setAttachmentIds(attachments);
+ }
+ messageRepository.save(message);
+ return convertToResponse(message);
+ }
+
+ @Override
+ public List findAllByChannelId(UUID channelId) {
+ List messages = messageRepository.findByChannelId(channelId);
+ List responses = new ArrayList<>();
+
+ for (Message msg : messages) {
+ responses.add(convertToResponse(msg));
+ }
+ return responses;
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return messageRepository.findById(id).map(this::convertToResponse);
+ }
+
+ @Override
+ public boolean delete(UUID id) {
+ Optional msgOpt = messageRepository.findById(id);
+
+ if (msgOpt.isPresent()) {
+ Message message = msgOpt.get();
+
+ if (message.getAttachmentIds() != null) {
+ for (UUID fileId : message.getAttachmentIds()) {
+ binaryContentRepository.delete(fileId); // 첨부파일 청소
+ }
+ }
+ messageRepository.delete(id);
+ return true;
+ }
+ return false;
+ }
+
+ private MessageDto.Response convertToResponse(Message message) {
+ return new MessageDto.Response(message.getId(), message.getContent(), message.getAuthorId(),
+ message.getChannelId(), message.getAttachmentIds(), message.getCreatedAt(), message.getUpdatedAt());
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicReadStatusService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicReadStatusService.java
new file mode 100644
index 00000000..56f4ebb7
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicReadStatusService.java
@@ -0,0 +1,44 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.ReadStatusDto;
+import com.sprint.mission.discodeit.entity.ReadStatus;
+import com.sprint.mission.discodeit.repository.ChannelRepository;
+import com.sprint.mission.discodeit.repository.ReadStatusRepository;
+import com.sprint.mission.discodeit.repository.UserRepository;
+import com.sprint.mission.discodeit.service.ReadStatusService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class BasicReadStatusService implements ReadStatusService {
+ private final ReadStatusRepository readStatusRepository;
+ private final UserRepository userRepository;
+ private final ChannelRepository channelRepository;
+
+ @Override
+ public ReadStatus create(ReadStatusDto.CreateRequest request) {
+ if (userRepository.findById(request.userId()).isEmpty() ||
+ channelRepository.findById(request.channelId()).isEmpty()) {
+ throw new IllegalArgumentException("존재하지 않는 유저 또는 채널입니다.");
+ }
+
+ if (readStatusRepository.findByUserIdAndChannelId(request.userId(), request.channelId()).isPresent()) {
+ throw new IllegalStateException("이미 존재하는 읽음 상태입니다.");
+ }
+
+ ReadStatus readStatus = new ReadStatus(request.userId(), request.channelId());
+ readStatusRepository.save(readStatus);
+ return readStatus;
+ }
+
+ @Override
+ public void update(UUID id) {
+ readStatusRepository.findById(id).ifPresent(rs -> {
+ rs.recordUpdate();
+ readStatusRepository.save(rs);
+ });
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserService.java
new file mode 100644
index 00000000..943f9b2c
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserService.java
@@ -0,0 +1,102 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.UserDto;
+import com.sprint.mission.discodeit.entity.User;
+import com.sprint.mission.discodeit.repository.*;
+import com.sprint.mission.discodeit.service.UserService;
+import com.sprint.mission.discodeit.service.UserStatusService; // 추가
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.Predicate;
+
+@Service
+@RequiredArgsConstructor
+public class BasicUserService implements UserService {
+ private final UserRepository userRepository;
+ private final UserStatusService userStatusService;
+ private final BinaryContentRepository binaryContentRepository;
+ private final ChannelRepository channelRepository;
+
+ private boolean isDuplicate(String email, String phone, Predicate condition) {
+ return userRepository.findAll().stream()
+ .filter(condition)
+ .anyMatch(u -> u.getEmail().equals(email) ||
+ (u.getPhoneNumber() != null && u.getPhoneNumber().equals(phone)));
+ }
+
+ @Override
+ public Optional create(UserDto.CreateRequest request) {
+ if (isDuplicate(request.email(), request.phoneNumber(), u -> true)) return Optional.empty();
+
+ User user = new User(request.displayName(), request.email(), request.password(), request.phoneNumber(), request.profileId());
+ userRepository.save(user);
+ userStatusService.create(user.getId());
+ return Optional.of(convertToResponse(user));
+ }
+
+ @Override
+ public Optional update(UUID id, UserDto.UpdateRequest request) {
+ return userRepository.findById(id).map(user -> {
+ if (isDuplicate(request.email(), request.phoneNumber(), u -> !u.getId().equals(id))) {
+ throw new IllegalStateException("이미 사용 중인 이메일 또는 전화번호입니다.");
+ }
+ user.setDisplayName(request.displayName());
+ user.setEmail(request.email());
+ user.setPhoneNumber(request.phoneNumber());
+ user.setProfileId(request.profileId());
+ user.recordUpdate();
+ userRepository.save(user);
+ return convertToResponse(user);
+ });
+ }
+
+ @Override
+ public boolean delete(UUID id) {
+ return userRepository.findById(id).map(user -> {
+ userStatusService.deleteByUserId(id);
+
+ if (user.getProfileId() != null) binaryContentRepository.delete(user.getProfileId());
+
+ channelRepository.findAll().forEach(channel -> {
+ List participants = channel.getParticipantUserIds();
+ if (participants != null && participants.contains(id)) {
+ List mutableParticipants = new ArrayList<>(participants);
+ mutableParticipants.remove(id);
+ channel.setParticipantUserIds(mutableParticipants);
+ channelRepository.save(channel);
+ }
+ });
+
+ userRepository.delete(id);
+ return true;
+ }).orElse(false);
+ }
+
+ @Override
+ public Optional findById(UUID id) {
+ return userRepository.findById(id).map(this::convertToResponse);
+ }
+
+ @Override
+ public List findAll() {
+ return userRepository.findAll().stream().map(this::convertToResponse).toList();
+ }
+
+ private UserDto.Response convertToResponse(User user) {
+ boolean isOnline = userStatusService.isUserOnline(user.getId());
+
+ return new UserDto.Response(
+ user.getId(),
+ user.getDisplayName(),
+ user.getEmail(),
+ isOnline,
+ user.getProfileId(),
+ user.getPhoneNumber()
+ );
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserStatusService.java b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserStatusService.java
new file mode 100644
index 00000000..c03d5815
--- /dev/null
+++ b/discodeit/src/main/java/com/sprint/mission/discodeit/service/basic/BasicUserStatusService.java
@@ -0,0 +1,75 @@
+package com.sprint.mission.discodeit.service.basic;
+
+import com.sprint.mission.discodeit.dto.UserStatusDto;
+import com.sprint.mission.discodeit.entity.UserStatus;
+import com.sprint.mission.discodeit.repository.UserStatusRepository;
+import com.sprint.mission.discodeit.service.UserStatusService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class BasicUserStatusService implements UserStatusService {
+ private final UserStatusRepository userStatusRepository;
+
+ @Override
+ public UserStatusDto.Response create(UUID userId) {
+ if (userStatusRepository.findByUserId(userId).isPresent()) {
+ throw new IllegalStateException("해당 유저의 상태가 이미 존재합니다.");
+ }
+
+ UserStatus status = new UserStatus(userId);
+ userStatusRepository.save(status);
+ return convertToResponse(status);
+ }
+
+ @Override
+ public void updateByUserId(UUID userId) {
+ userStatusRepository.findByUserId(userId).ifPresent(status -> {
+ status.updateLastAccessedAt(); // 접속 시간 현재로 갱신
+ userStatusRepository.save(status);
+ });
+ }
+
+ @Override
+ public boolean isUserOnline(UUID userId) {
+ return userStatusRepository.findByUserId(userId)
+ .map(status -> {
+ Instant lastAccessed = status.getLastAccessedAt();
+ return lastAccessed != null &&
+ lastAccessed.isAfter(Instant.now().minus(5, ChronoUnit.MINUTES));
+ }).orElse(false);
+ }
+
+ @Override
+ public Optional findByUserId(UUID userId) {
+ return userStatusRepository.findByUserId(userId).map(this::convertToResponse);
+ }
+
+ @Override
+ public List findAll() {
+ return userStatusRepository.findAll().stream()
+ .map(this::convertToResponse)
+ .toList();
+ }
+
+ @Override
+ public void deleteByUserId(UUID userId) {
+ userStatusRepository.findByUserId(userId)
+ .ifPresent(s -> userStatusRepository.delete(s.getId()));
+ }
+
+ private UserStatusDto.Response convertToResponse(UserStatus status) {
+ return new UserStatusDto.Response(
+ status.getId(),
+ status.getUserId(),
+ status.getLastAccessedAt()
+ );
+ }
+}
\ No newline at end of file
diff --git a/discodeit/src/main/resources/application.yaml b/discodeit/src/main/resources/application.yaml
new file mode 100644
index 00000000..f62960aa
--- /dev/null
+++ b/discodeit/src/main/resources/application.yaml
@@ -0,0 +1,4 @@
+discodeit:
+ repository:
+ type: jcf # jcf 또는 file
+ file-directory: .discodeit # 이 부분이 누락되어서 에러가 난 거예요!
\ No newline at end of file
diff --git a/discodeit/src/test/java/com/sprint/mission/discodeit/DiscodeitApplicationTests.java b/discodeit/src/test/java/com/sprint/mission/discodeit/DiscodeitApplicationTests.java
new file mode 100644
index 00000000..3a987a21
--- /dev/null
+++ b/discodeit/src/test/java/com/sprint/mission/discodeit/DiscodeitApplicationTests.java
@@ -0,0 +1,13 @@
+package com.sprint.mission.discodeit;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DiscodeitApplicationTests {
+
+ @Test
+ void contextLoads() {
+ }
+
+}
diff --git a/messages.ser b/messages.ser
new file mode 100644
index 00000000..d2022304
Binary files /dev/null and b/messages.ser differ
diff --git a/users.ser b/users.ser
new file mode 100644
index 00000000..be2bf0a6
Binary files /dev/null and b/users.ser differ