Fixes #3 Upload File to Slack

demo/build.gradle

@@ -4,6 +4,7 @@ buildscript {
             url uri('../repo')
         }
     }
+
     dependencies {
         classpath "com.oliverspryn.gradle:gradle-slack-uploader-plugin:1.0.0"
     }
@@ -20,7 +21,9 @@ repositories {
 }
 
 uploadFileToSlack {
-    comment "sample.txt"
-    channels "general", "random"
+    comment "Hello from Gradle!"
+    channels "gradle-slack"
+    enabled true
     filePath "sample.txt"
+    token GRADLE_SLACK_UPLOADER_PLUGIN_TOKEN ?: "" // Defined in the global gradle.properties file
 }

demo/sample.txt

@@ -0,0 +1 @@
+This came from Gradle!

src/main/kotlin/com/oliverspryn/gradle/SlackUploaderExtension.kt

@@ -1,9 +1,12 @@
 package com.oliverspryn.gradle
 
 open class SlackUploaderExtension {
+
     var channels: List<String>? = null
     var comment: String? = null
+    var enabled = true
     var filePath: String? = null
+    var token: String? = null
 
     fun channels(vararg channels: String) {
         this.channels = channels.toList()

src/main/kotlin/com/oliverspryn/gradle/SlackUploaderTask.kt

@@ -1,5 +1,11 @@
 package com.oliverspryn.gradle
 
+import com.github.seratch.jslack.Slack
+import com.github.seratch.jslack.api.methods.request.files.FilesUploadRequest
+import com.oliverspryn.gradle.exceptions.FileUploadException
+import com.oliverspryn.gradle.exceptions.MissingChannelException
+import com.oliverspryn.gradle.exceptions.MissingFilePathException
+import com.oliverspryn.gradle.exceptions.MissingTokenException
 import org.gradle.api.DefaultTask
 import org.gradle.api.tasks.TaskAction
 import java.nio.file.Paths
@@ -15,10 +21,31 @@ open class SlackUploaderTask : DefaultTask() {
 
     @TaskAction
     fun doUpload() {
-        val fullPath = Paths.get(projectRoot, extension?.filePath).toAbsolutePath()
 
-        println("Comment: ${extension?.comment}")
-        println("Channels: ${extension?.channels?.joinToString()}")
-        println("File to Upload: $fullPath")
+        if (extension?.enabled != true) return
+        validateConfiguration()
+
+        val file = Paths.get(projectRoot, extension?.filePath).toFile()
+        val slack = Slack.getInstance()
+
+        val uploadRequest = FilesUploadRequest.builder()
+            .channels(extension?.channels)
+            .file(file)
+            .filename("${file.name}.${file.extension}")
+            .initialComment(extension?.comment ?: "")
+            .token(extension?.token)
+            .build()
+
+        val result = slack.methods().filesUpload(uploadRequest)
+
+        if (!result.isOk) {
+            throw FileUploadException(result.error)
+        }
+    }
+
+    private fun validateConfiguration() {
+        if (extension?.channels.isNullOrEmpty()) throw MissingChannelException()
+        if (extension?.filePath.isNullOrBlank()) throw MissingFilePathException()
+        if (extension?.token.isNullOrBlank()) throw MissingTokenException()
     }
 }

src/main/kotlin/com/oliverspryn/gradle/exceptions/FileUploadException.kt

@@ -0,0 +1,3 @@
+package com.oliverspryn.gradle.exceptions
+
+class FileUploadException(reason: String) : Throwable(reason)

src/main/kotlin/com/oliverspryn/gradle/exceptions/MissingChannelException.kt

@@ -0,0 +1,3 @@
+package com.oliverspryn.gradle.exceptions
+
+class MissingChannelException : Throwable("Please specify at least one channel to send the file")

src/main/kotlin/com/oliverspryn/gradle/exceptions/MissingFilePathException.kt

@@ -0,0 +1,3 @@
+package com.oliverspryn.gradle.exceptions
+
+class MissingFilePathException : Throwable("Please specify a file to upload")

src/main/kotlin/com/oliverspryn/gradle/exceptions/MissingTokenException.kt

@@ -0,0 +1,3 @@
+package com.oliverspryn.gradle.exceptions
+
+class MissingTokenException : Throwable("Missing the Slack access token")