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/*
* Copyright 2018 Allan Wang
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.pitchedapps.frost.db
import android.os.Parcelable
import androidx.room.Dao
import androidx.room.Entity
import androidx.room.ForeignKey
import androidx.room.Insert
import androidx.room.OnConflictStrategy
import androidx.room.Query
import com.pitchedapps.frost.utils.L
import kotlinx.android.parcel.Parcelize
/**
* Created by Allan Wang on 2017-05-30.
*/
/**
* Generic cache to store serialized content
*/
@Entity(
tableName = "frost_cache",
primaryKeys = ["id", "type"],
foreignKeys = [
ForeignKey(
entity = CookieEntity::class,
parentColumns = ["cookie_id"],
childColumns = ["id"],
onDelete = ForeignKey.CASCADE
)
]
)
@Parcelize
data class CacheEntity(
val id: Long,
val type: String,
val lastUpdated: Long,
val contents: String
) : Parcelable
@Dao
interface CacheDao {
@Query("SELECT * FROM frost_cache WHERE id = :id AND type = :type")
fun _select(id: Long, type: String): CacheEntity?
@Insert(onConflict = OnConflictStrategy.REPLACE)
fun _insertCache(cache: CacheEntity)
@Query("DELETE FROM frost_cache WHERE id = :id AND type = :type")
fun _delete(id: Long, type: String)
}
suspend fun CacheDao.select(id: Long, type: String) = dao {
_select(id, type)
}
suspend fun CacheDao.delete(id: Long, type: String) = dao {
_delete(id, type)
}
/**
* Returns true if successful, given that there are constraints to the insertion
*/
suspend fun CacheDao.save(id: Long, type: String, contents: String): Boolean = dao {
try {
_insertCache(CacheEntity(id, type, System.currentTimeMillis(), contents))
true
} catch (e: Exception) {
L.e(e) { "Cache save failed for $type" }
false
}
}
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