add post creating business case

business_cases/post_creating/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/business_cases/post_creating/server/BusinessPostCreatingCase.kt

@@ -0,0 +1,27 @@
+package com.insanusmokrassar.postssystem.business_cases.post_creating.server
+
+import com.benasher44.uuid.uuid4
+import com.insanusmokrassar.postssystem.core.content.Content
+import com.insanusmokrassar.postssystem.core.content.api.ContentRepo
+import com.insanusmokrassar.postssystem.core.post.*
+import com.insanusmokrassar.postssystem.core.post.repo.PostsRepo
+import com.insanusmokrassar.postssystem.core.publishing.*
+
+class BusinessPostCreatingCase(
+    private val postsRepo: PostsRepo,
+    private val contentRepo: ContentRepo,
+    private val publishingRegistrar: PublishingRegistrar,
+    private val postKeyGenerator: PostKeyGenerator = { _, _ -> uuid4().toString() }
+) : PostCreatingCase {
+    override suspend fun createPost(postContent: List<Content>, triggerId: TriggerId): RegisteredPost? {
+        val content = postContent.mapNotNull { contentRepo.registerContent(it) }
+        val post = postsRepo.createPost(SimplePost(content.map { it.id })) ?: return null
+
+        publishingRegistrar.registerTriggerForPost(
+            postKeyGenerator(post.id, triggerId),
+            post.id
+        )
+
+        return post
+    }
+}

business_cases/post_creating/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/business_cases/post_creating/server/PostCreatingCase.kt

@@ -0,0 +1,20 @@
+package com.insanusmokrassar.postssystem.business_cases.post_creating.server
+
+import com.insanusmokrassar.postssystem.core.content.Content
+import com.insanusmokrassar.postssystem.core.post.RegisteredPost
+import com.insanusmokrassar.postssystem.core.publishing.PublishingKeyReceiver
+import com.insanusmokrassar.postssystem.core.publishing.TriggerId
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class PostCreatingCreatePostModel(
+    val postContent: List<Content>,
+    val triggerId: TriggerId
+)
+
+interface PostCreatingCase {
+    suspend fun createPost(
+        postContent: List<Content>,
+        triggerId: TriggerId
+    ): RegisteredPost?
+}

business_cases/post_creating/common/src/commonMain/kotlin/com/insanusmokrassar/postssystem/business_cases/post_creating/server/Routings.kt

@@ -0,0 +1,5 @@
+package com.insanusmokrassar.postssystem.business_cases.post_creating.server
+
+const val postCreatingRootRoute = "postCreating"
+
+const val postCreatingCreatePostRoute = "createPost"