add ContentAPI

core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/ContentAPI.kt

@@ -0,0 +1,3 @@
+package com.insanusmokrassar.postssystem.core.content.api
+
+interface ContentAPI : ReadContentAPI, WriteContentAPI

core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/ReadContentAPI.kt

@@ -0,0 +1,22 @@
+package com.insanusmokrassar.postssystem.core.content.api
+
+import com.insanusmokrassar.postssystem.core.content.ContentId
+import com.insanusmokrassar.postssystem.core.content.RegisteredContent
+import com.insanusmokrassar.postssystem.core.post.RegisteredPost
+import com.insanusmokrassar.postssystem.core.utils.pagination.Pagination
+import com.insanusmokrassar.postssystem.core.utils.pagination.PaginationResult
+
+/**
+ * Simple read API by different properties of [com.insanusmokrassar.postssystem.core.content.Content].
+ */
+interface ReadContentAPI {
+    /**
+     * @return [RegisteredContent] if it is available by [id]
+     */
+    suspend fun getContentById(id: ContentId): RegisteredContent?
+
+    /**
+     * @return all [RegisteredContent] by pages basing on their creation date
+     */
+    suspend fun getContentByPagination(pagination: Pagination): PaginationResult<out RegisteredContent>
+}

core/src/main/kotlin/com/insanusmokrassar/postssystem/core/content/api/WriteContentAPI.kt

@@ -0,0 +1,12 @@
+package com.insanusmokrassar.postssystem.core.content.api
+
+import com.insanusmokrassar.postssystem.core.content.*
+import kotlinx.coroutines.flow.Flow
+
+interface WriteContentAPI {
+    val contentCreatedFlow: Flow<RegisteredContent>
+    val contentDeletedFlow: Flow<RegisteredContent>
+
+    suspend fun createContent(post: Content): RegisteredContent?
+    suspend fun deleteContent(id: ContentId): Boolean
+}

core/src/test/kotlin/com/insanusmokrassar/postssystem/core/api/InMemoryPostsAPI.kt

@@ -1,28 +1,22 @@
 package com.insanusmokrassar.postssystem.core.post.api
 
 import com.insanusmokrassar.postssystem.core.content.ContentId
-import com.insanusmokrassar.postssystem.core.content.RegisteredContent
+import com.insanusmokrassar.postssystem.core.post.*
-import com.insanusmokrassar.postssystem.core.post.PostId
-import com.insanusmokrassar.postssystem.core.post.RegisteredPost
 import com.insanusmokrassar.postssystem.core.utils.pagination.*
+import kotlinx.coroutines.flow.Flow
 import org.joda.time.DateTime
 
 class InMemoryPostsAPI(
     initialPosts: List<RegisteredPost> = emptyList()
 ) : PostsAPI {
     private val posts: MutableMap<PostId, RegisteredPost> = initialPosts.associateBy { it.id }.toMutableMap()
-    private val content: MutableMap<ContentId, RegisteredContent> = initialPosts.asSequence().flatMap {
-        it.content.asSequence()
-    }.associateBy {
-        it.id
-    }.toMutableMap()
 
     private val sortedByDatePosts: List<RegisteredPost>
         get() = posts.values.sortedBy { it.creationDate }
 
     override suspend fun getPostById(id: PostId): RegisteredPost? = posts[id]
     override suspend fun getPostsByContent(id: ContentId): List<RegisteredPost> = posts.values.filter { post ->
-        post.content.any { it.id == id }
+        id in post.content
     }
     override suspend fun getPostsByDates(from: DateTime?, to: DateTime?): List<RegisteredPost> = posts.values.filter {
         from ?.let { _ -> it.creationDate >= from } ?: true && to ?.let { _ -> it.creationDate <= to } ?: true