Add Pageable

src/main/kotlin/pl/writeonly/omnibus/GenerateTestData.kt

@@ -11,22 +11,24 @@ class GenerateTestData
 fun main(args: Array<String>) {
 
   val dataSql = File("src/main/resources/data.sql")
-    dataSql.writeText("")
+  dataSql.writeText("")
 
-    repeat(100) { i ->
-        val timestamp = Timestamp.valueOf(LocalDateTime.now().minusDays(100 - i.toLong()))
-        dataSql.appendText(
-            "INSERT INTO post(id, title, content, created)"
-                    + " VALUES(${i}, 'Test Post ${i}', 'Content ${i}', TIMESTAMP '${timestamp}');\n"
-        )
-    }
+  repeat(100) { i ->
+    val localDataTime = LocalDateTime.now().minusDays(100 - i.toLong())
+    val timestamp = Timestamp.valueOf(localDataTime)
+    dataSql.appendText(
+      "INSERT INTO post(id, title, content, created)"
+          + " VALUES(${i}, 'Test Post ${i}', 'Content ${i}', TIMESTAMP '${timestamp}');\n"
+    )
+  }
 
-    repeat(1000) { i ->
-        val post_id = i/10
-        val timestamp = Timestamp.valueOf(LocalDateTime.now().minusDays(100 - i.toLong()))
-        dataSql.appendText(
-            "INSERT INTO comment(id, post_id, content, created)"
-                    + " VALUES(${i}, ${post_id}, 'Content ${i}', TIMESTAMP '${timestamp}');\n"
-        )
-    }
+  repeat(1000) { i ->
+    val post_id = i/10
+    val localDataTime = LocalDateTime.now().minusDays(100 - i.toLong())
+    val timestamp = Timestamp.valueOf(localDataTime)
+    dataSql.appendText(
+      "INSERT INTO comment(id, post_id, content, created)"
+          + " VALUES(${i}, ${post_id}, 'Content ${i}', TIMESTAMP '${timestamp}');\n"
+    )
+  }
 }

src/main/kotlin/pl/writeonly/omnibus/config/Config.kt

@@ -7,7 +7,7 @@ import org.springframework.context.annotation.Configuration
 @Configuration
 class Config(val objectMapper: ObjectMapper) {
 
-    fun customizeObjectMapper() {
-        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL)
-    }
+  fun customizeObjectMapper() {
+    objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL)
+  }
 }

src/main/kotlin/pl/writeonly/omnibus/controller/HelloController.kt

@@ -7,6 +7,6 @@ import pl.writeonly.omnibus.service.HelloService
 @RestController
 class HelloController(val helloService: HelloService) {
 
-    @GetMapping("/")
-    fun hello() = helloService.hello()
+  @GetMapping("/")
+  fun hello() = helloService.hello()
 }

src/main/kotlin/pl/writeonly/omnibus/controller/PostController.kt

@@ -1,18 +1,26 @@
 package pl.writeonly.omnibus.controller
 
 import io.swagger.v3.oas.annotations.tags.Tag
+import jakarta.validation.constraints.Min
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.RestController
+import pl.writeonly.omnibus.dto.PostDto
+import pl.writeonly.omnibus.mapper.mapToPostDtos
 import pl.writeonly.omnibus.model.Post
 import pl.writeonly.omnibus.service.PostService
 
 @Tag(name = "Post", description = "the Post Api")
 @RestController
 class PostController(val service: PostService) {
 
-    @GetMapping("/posts")
-    fun getPosts(): List<Post> = service.getPosts()
+  @GetMapping("/posts")
+  fun getPosts(@Min(0) page: Int = 0): List<PostDto> =
+    mapToPostDtos(service.getPosts(page))
 
-    @GetMapping("/posts/{id}")
-    fun getPost(id: Long): Post = service.getPost(id)
+  @GetMapping("/posts/{id}")
+  fun getPost(@Min(0) id: Long): Post = service.getPost(id)
+
+  @GetMapping("/posts/title/{title}")
+  fun findAllByTitle(title: String): List<PostDto> =
+    mapToPostDtos(service.findAllByTitle(title))
 }

src/main/kotlin/pl/writeonly/omnibus/dto/PostDto.kt

@@ -0,0 +1,10 @@
+package pl.writeonly.omnibus.dto
+
+import java.time.LocalDateTime
+
+data class PostDto(
+  val id: Long?,
+  val title: String?,
+  val content: String?,
+  val created: LocalDateTime?,
+)

src/main/kotlin/pl/writeonly/omnibus/mapper/PostDtoMapper.kt

@@ -0,0 +1,17 @@
+package pl.writeonly.omnibus.mapper
+
+import pl.writeonly.omnibus.dto.PostDto
+import pl.writeonly.omnibus.model.Post
+
+class PostDtoMapper
+
+fun mapToPostDtos(posts: List<Post>) = posts.map {
+  mapToPostDto(it)
+}
+
+fun mapToPostDto(post: Post) = PostDto(
+  id = post.id,
+  title = post.title,
+  content = post.content,
+  created = post.created
+)

src/main/kotlin/pl/writeonly/omnibus/model/Comment.kt

@@ -6,9 +6,9 @@ import java.time.LocalDateTime
 
 @Entity
 open class Comment(
-    @Id
-    open var id: Long?,
-    open var content: String?,
-    open var created: LocalDateTime?
+  @Id
+  open var id: Long?,
+  open var content: String?,
+  open var created: LocalDateTime?
 
 )

src/main/kotlin/pl/writeonly/omnibus/model/Post.kt

@@ -8,13 +8,13 @@ import java.time.LocalDateTime
 
 @Entity
 open class Post(
-    @Id
-    open var id: Long?,
-    open var title: String?,
-    open var content: String?,
-    open var created: LocalDateTime?,
+  @Id
+  open var id: Long?,
+  open var title: String?,
+  open var content: String?,
+  open var created: LocalDateTime?,
 
-    @OneToMany(targetEntity = Comment::class)
-    @JoinColumn(name = "post_id")
-    open var comments: List<Comment>
+  @OneToMany(targetEntity = Comment::class)
+  @JoinColumn(name = "post_id")
+  open var comments: List<Comment>
 )

src/main/kotlin/pl/writeonly/omnibus/repository/PostRepository.kt

@@ -1,9 +1,18 @@
 package pl.writeonly.omnibus.repository
 
+import org.springframework.data.domain.Pageable
 import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.data.jpa.repository.Query
 import org.springframework.stereotype.Repository
 import pl.writeonly.omnibus.model.Post
 
 @Repository
 interface PostRepository : JpaRepository<Post, Long> {
+
+  //    @Query("SELECT p FROM Post p left join fetch p.comments")
+  @Query("SELECT p FROM Post p")
+  fun findAllPost(pageable: Pageable): List<Post>
+
+  fun findAllByTitle(title: String): List<Post>
+
 }

src/main/kotlin/pl/writeonly/omnibus/service/HelloService.kt

@@ -4,5 +4,5 @@ import org.springframework.stereotype.Service
 
 @Service
 class HelloService {
-    fun hello() = "Hello World!"
+  fun hello() = "Hello World!"
 }

src/main/kotlin/pl/writeonly/omnibus/service/PostService.kt

@@ -1,13 +1,20 @@
 package pl.writeonly.omnibus.service
 
+import org.springframework.data.domain.PageRequest
 import org.springframework.stereotype.Service
 import pl.writeonly.omnibus.model.Post
 import pl.writeonly.omnibus.repository.PostRepository
 
 @Service
 class PostService(val repository: PostRepository) {
 
-    fun getPosts(): List<Post> = repository.findAll()
+  fun getPosts(pageNumber0: Int): List<Post> = run {
+    val pageNumber = if (0 <= pageNumber0) pageNumber0 else 0
+    repository.findAllPost(PageRequest.of(pageNumber, 10))
+  }
 
-    fun getPost(id: Long): Post = repository.getById(id)
+  fun getPost(id: Long): Post = repository.getById(id)
+
+  fun findAllByTitle(title: String): List<Post> =
+    repository.findAllByTitle(title)
 }