fix: タイムラインが重複する現象を修正

src/main/kotlin/dev/usbharu/hideout/core/domain/model/post/PostRepository.kt

@@ -6,7 +6,7 @@ import org.springframework.stereotype.Repository
 @Repository
 interface PostRepository {
     suspend fun generateId(): Long
-    suspend fun save(post: Post): Post
+    suspend fun save(post: Post): Boolean
     suspend fun delete(id: Long)
     suspend fun findById(id: Long): Post
 }

src/main/kotlin/dev/usbharu/hideout/core/domain/model/timeline/Timeline.kt

@@ -2,9 +2,11 @@ package dev.usbharu.hideout.core.domain.model.timeline
 
 import dev.usbharu.hideout.core.domain.model.post.Visibility
 import org.springframework.data.annotation.Id
+import org.springframework.data.mongodb.core.index.CompoundIndex
 import org.springframework.data.mongodb.core.mapping.Document
 
 @Document
+@CompoundIndex(def = "{'userId':1,'timelineId':1,'postId':1}", unique = true)
 data class Timeline(
     @Id
     val id: Long,

src/main/kotlin/dev/usbharu/hideout/core/infrastructure/exposedrepository/PostRepositoryImpl.kt

@@ -17,7 +17,7 @@ class PostRepositoryImpl(
 
     override suspend fun generateId(): Long = idGenerateService.generateId()
 
-    override suspend fun save(post: Post): Post {
+    override suspend fun save(post: Post): Boolean {
         val singleOrNull = Posts.select { Posts.id eq post.id }.singleOrNull()
         if (singleOrNull == null) {
             Posts.insert {
@@ -63,7 +63,7 @@ class PostRepositoryImpl(
             "Faild to insert"
         }
 
-        return post
+        return singleOrNull == null
     }
 
     override suspend fun findById(id: Long): Post =

src/main/kotlin/dev/usbharu/hideout/core/service/post/PostServiceImpl.kt

@@ -1,5 +1,6 @@
 package dev.usbharu.hideout.core.service.post
 
+import com.mongodb.DuplicateKeyException
 import dev.usbharu.hideout.activitypub.service.activity.create.ApSendCreateService
 import dev.usbharu.hideout.core.domain.exception.UserNotFoundException
 import dev.usbharu.hideout.core.domain.model.post.Post
@@ -38,13 +39,17 @@ class PostServiceImpl(
     }
 
     private suspend fun internalCreate(post: Post, isLocal: Boolean): Post {
-        val save = try {
+        return try {
-            postRepository.save(post)
+            if (postRepository.save(post)) {
+                try {
+                    timelineService.publishTimeline(post, isLocal)
+                } catch (_: DuplicateKeyException) {
+                }
+            }
+            post
         } catch (_: ExposedSQLException) {
             postQueryService.findByApId(post.apId)
         }
-        timelineService.publishTimeline(save, isLocal)
-        return save
     }
 
     private suspend fun internalCreate(post: PostCreateDto, isLocal: Boolean): Post {

src/main/resources/application.yml

@@ -24,6 +24,7 @@ spring:
     password: ""
   data:
     mongodb:
+      auto-index-creation: true
       host: localhost
       port: 27017
       database: hideout