data: add database for lobsters posts

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

build.gradle

@@ -5,6 +5,7 @@ buildscript {
         dagger_version = '2.29.1'
         hilt_version = '2.29-alpha'
         kotlin_version = '1.4.10'
+        moshi_version = '1.9.3'
         room_version = '2.3.0-alpha02'
     }
     repositories {

data/build.gradle

@@ -4,7 +4,10 @@ plugins {
 }
 
 dependencies {
+    implementation project(":model")
     kapt "androidx.room:room-compiler:$room_version"
     api "androidx.room:room-runtime:$room_version"
-    api "androidx.room:room-ktx:$room_version"
+    implementation "androidx.room:room-ktx:$room_version"
+    implementation "com.squareup.moshi:moshi:$moshi_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version"
 }

data/src/main/java/dev/msfjarvis/lobsters/data/source/LobstersApiTypeConverters.kt

@@ -0,0 +1,63 @@
+package dev.msfjarvis.lobsters.data.source
+
+import androidx.room.TypeConverter
+import com.squareup.moshi.Moshi
+import dev.msfjarvis.lobsters.model.KeybaseSignature
+import dev.msfjarvis.lobsters.model.KeybaseSignatureJsonAdapter
+import dev.msfjarvis.lobsters.model.LobstersPost
+import dev.msfjarvis.lobsters.model.LobstersPostJsonAdapter
+import dev.msfjarvis.lobsters.model.Submitter
+import dev.msfjarvis.lobsters.model.SubmitterJsonAdapter
+
+object LobstersApiTypeConverters {
+  private val moshi = Moshi.Builder().build()
+  private const val SEPARATOR = ","
+
+  @TypeConverter
+  @JvmStatic
+  fun toSubmitterUser(value: String?): Submitter? {
+    return value?.let { SubmitterJsonAdapter(moshi).fromJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun fromSubmitterUser(value: Submitter?): String? {
+    return value?.let { SubmitterJsonAdapter(moshi).toJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun toKeybaseSignature(value: String?): KeybaseSignature? {
+    return value?.let { KeybaseSignatureJsonAdapter(moshi).fromJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun fromKeybaseSignature(value: KeybaseSignature?): String? {
+    return value?.let { KeybaseSignatureJsonAdapter(moshi).toJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun toLobstersPost(value: String?): LobstersPost? {
+    return value?.let { LobstersPostJsonAdapter(moshi).fromJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun fromLobstersPost(value: LobstersPost?): String? {
+    return value?.let { LobstersPostJsonAdapter(moshi).toJson(value) }
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun toTagList(value: String?): List<String>? {
+    return value?.split(SEPARATOR)
+  }
+
+  @TypeConverter
+  @JvmStatic
+  fun fromTagList(value: List<String>?): String? {
+    return value?.joinToString(SEPARATOR)
+  }
+}

data/src/main/java/dev/msfjarvis/lobsters/data/source/PostsDao.kt

@@ -0,0 +1,23 @@
+package dev.msfjarvis.lobsters.data.source
+
+import androidx.room.Dao
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Query
+import dev.msfjarvis.lobsters.model.LobstersPost
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+abstract class PostsDao {
+  @Query("SELECT * FROM lobsters_posts")
+  abstract fun loadPosts(): Flow<List<LobstersPost>>
+
+  @Insert
+  abstract suspend fun insertPosts(vararg posts: LobstersPost)
+
+  @Delete
+  abstract suspend fun deletePosts(vararg posts: LobstersPost)
+
+  @Query("DELETE FROM lobsters_posts")
+  abstract suspend fun deleteAllPosts()
+}

data/src/main/java/dev/msfjarvis/lobsters/data/source/PostsDatabase.kt

@@ -0,0 +1,21 @@
+package dev.msfjarvis.lobsters.data.source
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
+import dev.msfjarvis.lobsters.model.LobstersPost
+
+@Database(
+  entities = [
+    LobstersPost::class,
+  ],
+  version = 1,
+  exportSchema = false,
+)
+@TypeConverters(
+  LobstersApiTypeConverters::class,
+  DateTimeTypeConverters::class,
+)
+abstract class PostsDatabase : RoomDatabase() {
+  abstract fun postsDao(): PostsDao
+}

model/build.gradle

@@ -4,7 +4,6 @@ plugins {
 }
 
 dependencies {
-    def moshi_version = "1.9.3"
     api "androidx.room:room-runtime:$room_version"
     kapt "com.squareup.moshi:moshi-kotlin-codegen:$moshi_version"
     implementation "com.squareup.moshi:moshi:$moshi_version"