feat: 検索結果を保存する DB を実装 (#9)

app/build.gradle

@@ -95,4 +95,9 @@ dependencies {
 
     // System UI
     implementation "com.google.accompanist:accompanist-systemuicontroller:0.28.0"
+
+    // Database
+    implementation 'androidx.room:room-runtime:2.4.3'
+    implementation 'androidx.room:room-ktx:2.4.3'
+    kapt "androidx.room:room-compiler:2.4.3"
 }

app/src/main/kotlin/jp/co/yumemi/android/code_check/data/local/SearchDao.kt

@@ -0,0 +1,24 @@
+package jp.co.yumemi.android.code_check.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.Query
+import jp.co.yumemi.android.code_check.data.local.model.SearchEntity
+
+@Dao
+interface SearchDao {
+
+    @Query(
+        value = """
+            SELECT `query` FROM SearchEntity
+            WHERE `result` == 1
+            GROUP BY `query`
+            ORDER BY COUNT(`query`) DESC
+            LIMIT 10
+        """
+    )
+    suspend fun topSearched(): List<String>
+
+    @Insert
+    suspend fun insertSearchResult(entity: SearchEntity)
+}

app/src/main/kotlin/jp/co/yumemi/android/code_check/data/local/SearchDatabase.kt

@@ -0,0 +1,18 @@
+package jp.co.yumemi.android.code_check.data.local
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import jp.co.yumemi.android.code_check.data.local.model.SearchEntity
+
+@Database(
+    entities = [SearchEntity::class],
+    version = 1,
+)
+abstract class SearchDatabase: RoomDatabase() {
+
+    abstract val searchDao: SearchDao
+
+    companion object {
+        const val DATABASE_NAME = "search_result_db"
+    }
+}

app/src/main/kotlin/jp/co/yumemi/android/code_check/data/local/model/SearchEntity.kt

@@ -0,0 +1,12 @@
+package jp.co.yumemi.android.code_check.data.local.model
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class SearchEntity(
+    val query: String,
+    val result: Boolean,
+    val searchedAt: Long,
+    @PrimaryKey val id: Int? = null
+)

app/src/main/kotlin/jp/co/yumemi/android/code_check/data/repository/SearchResultRepository.kt

@@ -0,0 +1,8 @@
+package jp.co.yumemi.android.code_check.data.repository
+
+interface SearchResultRepository {
+
+    suspend fun getTopSearched(): List<String>
+
+    suspend fun insertRecord(query: String, result: Boolean)
+}

app/src/main/kotlin/jp/co/yumemi/android/code_check/data/repository/SearchResultRepositoryImpl.kt

@@ -0,0 +1,24 @@
+package jp.co.yumemi.android.code_check.data.repository
+
+import jp.co.yumemi.android.code_check.data.local.SearchDao
+import jp.co.yumemi.android.code_check.data.local.model.SearchEntity
+import java.util.*
+
+class SearchResultRepositoryImpl(
+    private val searchDao: SearchDao,
+) : SearchResultRepository {
+
+    override suspend fun getTopSearched(): List<String> {
+        return searchDao.topSearched()
+    }
+
+    override suspend fun insertRecord(query: String, result: Boolean) {
+        return searchDao.insertSearchResult(
+            SearchEntity(
+                query = query,
+                result = result,
+                searchedAt = Calendar.getInstance().time.time,
+            )
+        )
+    }
+}

app/src/main/kotlin/jp/co/yumemi/android/code_check/di/AppModule.kt

@@ -1,12 +1,17 @@
 package jp.co.yumemi.android.code_check.di
 
+import android.app.Application
+import androidx.room.Room
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import jp.co.yumemi.android.code_check.data.local.SearchDatabase
 import jp.co.yumemi.android.code_check.data.remote.GitHubAPI
 import jp.co.yumemi.android.code_check.data.repository.GitHubRepository
 import jp.co.yumemi.android.code_check.data.repository.GitHubRepositoryImpl
+import jp.co.yumemi.android.code_check.data.repository.SearchResultRepository
+import jp.co.yumemi.android.code_check.data.repository.SearchResultRepositoryImpl
 import javax.inject.Singleton
 
 @Module
@@ -19,4 +24,20 @@ object AppModule {
         val api = GitHubAPI()
         return GitHubRepositoryImpl(api)
     }
+
+    @Provides
+    @Singleton
+    fun provideSearchDatabase(app: Application): SearchDatabase {
+        return Room.databaseBuilder(
+            app,
+            SearchDatabase::class.java,
+            SearchDatabase.DATABASE_NAME
+        ).build()
+    }
+
+    @Provides
+    @Singleton
+    fun provideSearchResultRepository(db: SearchDatabase): SearchResultRepository {
+        return SearchResultRepositoryImpl(db.searchDao)
+    }
 }