107 lines
3.7 KiB
Kotlin
107 lines
3.7 KiB
Kotlin
/*
|
|
* Twidere - Twitter client for Android
|
|
*
|
|
* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
|
|
*
|
|
* 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 org.mariotaku.twidere.util.sync
|
|
|
|
import android.content.Context
|
|
import android.net.Uri
|
|
import androidx.collection.ArrayMap
|
|
import nl.komponents.kovenant.Promise
|
|
import nl.komponents.kovenant.then
|
|
import okio.ByteString.Companion.encodeUtf8
|
|
import org.mariotaku.twidere.TwidereConstants.TIMELINE_SYNC_CACHE_PREFERENCES_NAME
|
|
import org.mariotaku.twidere.annotation.ReadPositionTag
|
|
import org.mariotaku.twidere.util.DebugLog
|
|
import java.util.*
|
|
|
|
/**
|
|
* Created by mariotaku on 2017/4/13.
|
|
*/
|
|
|
|
abstract class TimelineSyncManager(val context: Context) {
|
|
|
|
private val stagedCommits = ArrayMap<TimelineKey, Long>()
|
|
private val cachedPositions = context.getSharedPreferences(TIMELINE_SYNC_CACHE_PREFERENCES_NAME,
|
|
Context.MODE_PRIVATE)
|
|
|
|
fun setPosition(@ReadPositionTag positionTag: String, currentTag: String?, positionKey: Long) {
|
|
stagedCommits[TimelineKey(positionTag, currentTag)] = positionKey
|
|
}
|
|
|
|
fun commit() {
|
|
val data = stagedCommits.map { (key, value) ->
|
|
PositionData(key.positionTag, key.currentTag, value)
|
|
}.toTypedArray()
|
|
stagedCommits.clear()
|
|
if (data.isEmpty()) return
|
|
putAllPosition(data)
|
|
}
|
|
|
|
fun fetchSingle(@ReadPositionTag positionTag: String, currentTag: String?) {
|
|
getSinglePosition(positionTag, currentTag).then { position ->
|
|
cachedPositions.edit().putLong(cacheKey(positionTag, currentTag), position).apply()
|
|
}.fail {
|
|
DebugLog.w(tr = it)
|
|
}
|
|
}
|
|
|
|
fun peekPosition(@ReadPositionTag positionTag: String, currentTag: String?): Long {
|
|
val cacheKey = cacheKey(positionTag, currentTag)
|
|
val position = cachedPositions.getLong(cacheKey, -1)
|
|
cachedPositions.edit().remove(cacheKey).apply()
|
|
return position
|
|
}
|
|
|
|
protected abstract fun putAllPosition(data: Array<PositionData>): Promise<Unit, Exception>
|
|
|
|
protected abstract fun getSinglePosition(@ReadPositionTag positionTag: String, currentTag: String?):
|
|
Promise<Long, Exception>
|
|
|
|
data class TimelineKey(val positionTag: String, val currentTag: String?)
|
|
data class PositionData(val positionTag: String, val currentTag: String?, val positionKey: Long)
|
|
|
|
abstract class Factory {
|
|
protected var manager: TimelineSyncManager? = null
|
|
|
|
fun get(): TimelineSyncManager? = manager
|
|
|
|
fun setup(context: Context) {
|
|
manager = create(context)
|
|
}
|
|
|
|
protected abstract fun create(context: Context): TimelineSyncManager?
|
|
|
|
}
|
|
|
|
object DummyFactory : Factory() {
|
|
override fun create(context: Context): Nothing? = null
|
|
}
|
|
|
|
companion object {
|
|
fun newFactory(): Factory = ServiceLoader.load(Factory::class.java).firstOrNull() ?: DummyFactory
|
|
|
|
private fun cacheKey(@ReadPositionTag positionTag: String, currentTag: String?): String {
|
|
if (currentTag == null) return positionTag
|
|
return "$positionTag:${Uri.encode(currentTag)}".encodeUtf8().sha1().hex()
|
|
}
|
|
}
|
|
|
|
|
|
}
|