feat: Support appending to message attachments instead of replacing

build.gradle.kts

@@ -62,6 +62,7 @@ kotlin {
                 implementation(kotlin("test-annotations-common"))
                 implementation("io.kotest:kotest-framework-engine:$kotestVersion")
                 implementation("io.kotest:kotest-assertions-core:$kotestVersion")
+                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1")
             }
         }
     }

src/commonMain/kotlin/com/monta/slack/notifier/SlackClient.kt

@@ -5,29 +5,24 @@ import com.monta.slack.notifier.model.JobStatus
 import com.monta.slack.notifier.model.JobType
 import com.monta.slack.notifier.model.SlackBlock
 import com.monta.slack.notifier.model.SlackMessage
-import com.monta.slack.notifier.util.JsonUtil
 import com.monta.slack.notifier.util.buildTitle
-import com.monta.slack.notifier.util.client
-import io.ktor.client.request.*
-import io.ktor.client.statement.*
-import io.ktor.http.*
-import io.ktor.utils.io.charsets.*
+import kotlinx.datetime.LocalDateTime
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
 class SlackClient(
     private val serviceName: String?,
     private val serviceEmoji: String?,
-    private val slackToken: String,
     private val slackChannelId: String,
+    private val appendAttachments: Boolean,
+    private val slackHttpClient: SlackHttpClient,
 ) {
-
     suspend fun create(
         githubEvent: GithubEvent,
         jobType: JobType,
         jobStatus: JobStatus,
     ): String {
-        val response = makeSlackRequest(
+        val response = slackHttpClient.makeSlackRequest(
             url = "https://slack.com/api/chat.postMessage",
             message = generateMessageFromGithubEvent(
                 githubEvent = githubEvent,
@@ -45,9 +40,9 @@ class SlackClient(
         jobType: JobType,
         jobStatus: JobStatus,
     ): String {
-        val previousMessage = getSlackMessageById(messageId)
+        val previousMessage = slackHttpClient.getSlackMessageById(messageId)
 
-        val response = makeSlackRequest(
+        val response = slackHttpClient.makeSlackRequest(
             url = "https://slack.com/api/chat.update",
             message = generateMessageFromGithubEvent(
                 githubEvent = githubEvent,
@@ -99,7 +94,7 @@ class SlackClient(
                         ),
                         SlackBlock.Text(
                             type = "mrkdwn",
-                            text = " \n*Comitter:*\n${githubEvent.displayName}"
+                            text = " \n*Committer:*\n${githubEvent.displayName}"
                         ),
                         SlackBlock.Text(
                             type = "mrkdwn",
@@ -126,81 +121,53 @@ class SlackClient(
         messageId: String? = null,
         previousAttachments: List<SlackMessage.Attachment>? = null,
     ): SlackMessage {
-        val attachments = mutableMapOf<JobType, SlackMessage.Attachment>()
+        val attachments = if (appendAttachments) {
+            previousAttachments.orEmpty() + SlackMessage.Attachment(
+                color = jobStatus.color,
+                fields = listOf(
+                    SlackMessage.Attachment.Field(
+                        title = jobType.label + " ($LocalDateTime)",
+                        short = false,
+                        value = jobStatus.message
+                    )
+                )
+            )
+        } else {
+            val attachments = mutableMapOf<JobType, SlackMessage.Attachment>()
 
-        previousAttachments?.forEach { previousAttachment ->
-            if (previousAttachment.jobType == null) {
-                return@forEach
+            previousAttachments?.forEach { previousAttachment ->
+                if (previousAttachment.jobType == null) {
+                    return@forEach
+                }
+                attachments[previousAttachment.jobType] = previousAttachment
             }
-            attachments[previousAttachment.jobType] = previousAttachment
-        }
 
-        attachments[jobType] = SlackMessage.Attachment(
-            color = jobStatus.color,
-            fields = listOf(
-                SlackMessage.Attachment.Field(
-                    title = jobType.label,
-                    short = false,
-                    value = jobStatus.message
+            attachments[jobType] = SlackMessage.Attachment(
+                color = jobStatus.color,
+                fields = listOf(
+                    SlackMessage.Attachment.Field(
+                        title = jobType.label,
+                        short = false,
+                        value = jobStatus.message
+                    )
                 )
             )
-        )
+
+            attachments.values.toList()
+        }
 
         return generateSlackMessageFromEvent(
             githubEvent = githubEvent,
             serviceName = serviceName,
             serviceEmoji = serviceEmoji,
             slackChannelId = slackChannelId,
             messageId = messageId,
-            attachments = attachments.values.toList()
+            attachments = attachments
         )
     }
 
-    private suspend fun getSlackMessageById(
-        messageId: String,
-    ): MessageResponse? {
-        val response = client.get {
-            header("Authorization", "Bearer $slackToken")
-            url {
-                url("https://slack.com/api/conversations.history")
-                parameters.append("channel", slackChannelId)
-                parameters.append("oldest", messageId)
-                parameters.append("inclusive", "true")
-                parameters.append("limit", "1")
-            }
-        }
-
-        val bodyString = response.bodyAsText()
-
-        return if (response.status.value in 200..299) {
-            println("successfully got message bodyString=$bodyString")
-            JsonUtil.instance.decodeFromString(bodyString)
-        } else {
-            println("failed to get message $bodyString")
-            null
-        }
-    }
-
-    private suspend fun makeSlackRequest(url: String, message: SlackMessage): Response? {
-        val response = client.post(url) {
-            header("Authorization", "Bearer $slackToken")
-            contentType(ContentType.Application.Json.withParameter("charset", Charsets.UTF_8.name))
-            setBody(message)
-        }
-
-        val bodyString = response.bodyAsText()
-
-        return if (response.status.value in 200..299) {
-            println("successfully posted message bodyString=$bodyString")
-            JsonUtil.instance.decodeFromString(bodyString)
-        } else {
-            println("failed to post message $bodyString")
-            null
-        }
-    }
-
     @Serializable
-    private data class Response(
+    data class Response(
         @SerialName("ok")
         val ok: Boolean, // true
         @SerialName("channel")
@@ -210,7 +177,7 @@ class SlackClient(
     )
 
     @Serializable
-    private data class MessageResponse(
+    data class MessageResponse(
         @SerialName("ok")
         val ok: Boolean, // true
         @SerialName("messages")

src/commonMain/kotlin/com/monta/slack/notifier/SlackHttpClient.kt

@@ -0,0 +1,66 @@
+package com.monta.slack.notifier
+
+import com.monta.slack.notifier.SlackClient.MessageResponse
+import com.monta.slack.notifier.SlackClient.Response
+import com.monta.slack.notifier.model.SlackMessage
+import com.monta.slack.notifier.util.JsonUtil
+import com.monta.slack.notifier.util.client
+import io.ktor.client.request.get
+import io.ktor.client.request.header
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
+import io.ktor.client.request.url
+import io.ktor.client.statement.bodyAsText
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+import io.ktor.utils.io.charsets.Charsets
+import io.ktor.utils.io.charsets.name
+
+open class SlackHttpClient(
+    private val slackToken: String,
+    private val slackChannelId: String,
+) {
+
+    open suspend fun getSlackMessageById(
+        messageId: String,
+    ): MessageResponse? {
+        val response = client.get {
+            header("Authorization", "Bearer $slackToken")
+            url {
+                url("https://slack.com/api/conversations.history")
+                parameters.append("channel", slackChannelId)
+                parameters.append("oldest", messageId)
+                parameters.append("inclusive", "true")
+                parameters.append("limit", "1")
+            }
+        }
+
+        val bodyString = response.bodyAsText()
+
+        return if (response.status.value in 200..299) {
+            println("successfully got message bodyString=$bodyString")
+            JsonUtil.instance.decodeFromString(bodyString)
+        } else {
+            println("failed to get message $bodyString")
+            null
+        }
+    }
+
+    open suspend fun makeSlackRequest(url: String, message: SlackMessage): Response? {
+        val response = client.post(url) {
+            header("Authorization", "Bearer $slackToken")
+            contentType(ContentType.Application.Json.withParameter("charset", Charsets.UTF_8.name))
+            setBody(message)
+        }
+
+        val bodyString = response.bodyAsText()
+
+        return if (response.status.value in 200..299) {
+            println("successfully posted message bodyString=$bodyString")
+            JsonUtil.instance.decodeFromString(bodyString)
+        } else {
+            println("failed to post message $bodyString")
+            null
+        }
+    }
+}

src/commonMain/kotlin/com/monta/slack/notifier/command/PublishSlackCommand.kt

@@ -3,6 +3,7 @@ package com.monta.slack.notifier.command
 import com.github.ajalt.clikt.core.CliktCommand
 import com.github.ajalt.clikt.parameters.options.option
 import com.github.ajalt.clikt.parameters.options.required
+import com.monta.slack.notifier.SlackHttpClient
 import com.monta.slack.notifier.model.GithubEvent
 import com.monta.slack.notifier.model.JobStatus
 import com.monta.slack.notifier.model.JobType
@@ -73,14 +74,20 @@ class PublishSlackCommand : CliktCommand() {
         envvar = "SLACK_MESSAGE_ID"
     )
 
+    private val appendStatusUpdates: String? by option(
+        help = "Append status updates or change to latest status",
+        envvar = "APPEND_STATUS_UPDATES"
+    )
+
     override fun run() {
         runBlocking {
             val githubEvent = getGithubEvent()
             PublishSlackService(
                 serviceName = serviceName.valueOrNull(),
                 serviceEmoji = serviceEmoji.valueOrNull(),
-                slackToken = slackToken,
-                slackChannelId = slackChannelId
+                slackChannelId = slackChannelId,
+                appendAttachments = appendStatusUpdates.toBoolean(),
+                slackHttpClient = SlackHttpClient(slackToken, slackChannelId)
             ).publish(
                 githubEvent = githubEvent,
                 jobType = JobType.fromString(jobType),

src/commonMain/kotlin/com/monta/slack/notifier/service/PublishSlackService.kt

@@ -1,23 +1,25 @@
 package com.monta.slack.notifier.service
 
 import com.monta.slack.notifier.SlackClient
+import com.monta.slack.notifier.SlackHttpClient
 import com.monta.slack.notifier.model.GithubEvent
 import com.monta.slack.notifier.model.JobStatus
 import com.monta.slack.notifier.model.JobType
 import com.monta.slack.notifier.util.writeToOutput
 
 class PublishSlackService(
-    serviceName: String?,
-    serviceEmoji: String?,
-    slackToken: String,
-    slackChannelId: String,
+    private val serviceName: String?,
+    private val serviceEmoji: String?,
+    private val slackChannelId: String,
+    private val appendAttachments: Boolean = false,
+    private val slackHttpClient: SlackHttpClient,
 ) {
-
     private val slackClient = SlackClient(
         serviceName = serviceName,
         serviceEmoji = serviceEmoji,
-        slackToken = slackToken,
-        slackChannelId = slackChannelId
+        slackChannelId = slackChannelId,
+        appendAttachments = appendAttachments,
+        slackHttpClient = slackHttpClient
     )
 
     suspend fun publish(
@@ -37,7 +39,7 @@ class PublishSlackService(
                 messageId = slackMessageId,
                 githubEvent = githubEvent,
                 jobType = jobType,
-                jobStatus = jobStatus
+                jobStatus = jobStatus,
             )
         }