254 lines
9.4 KiB
Kotlin
254 lines
9.4 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.loader
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import android.accounts.AccountManager
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import android.content.Context
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import android.database.sqlite.SQLiteDatabase
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import android.support.annotation.WorkerThread
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import android.util.Log
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import com.bluelinelabs.logansquare.LoganSquare
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import com.nostra13.universalimageloader.cache.disc.DiskCache
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import org.mariotaku.kpreferences.get
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import org.mariotaku.microblog.library.MicroBlog
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import org.mariotaku.microblog.library.MicroBlogException
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import org.mariotaku.microblog.library.twitter.model.Paging
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import org.mariotaku.microblog.library.twitter.model.Status
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import org.mariotaku.twidere.BuildConfig
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import org.mariotaku.twidere.TwidereConstants.*
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import org.mariotaku.twidere.app.TwidereApplication
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import org.mariotaku.twidere.constant.loadItemLimitKey
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import org.mariotaku.twidere.extension.model.newMicroBlogInstance
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import org.mariotaku.twidere.model.AccountDetails
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import org.mariotaku.twidere.model.ListResponse
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import org.mariotaku.twidere.model.ParcelableStatus
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import org.mariotaku.twidere.model.UserKey
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import org.mariotaku.twidere.model.util.AccountUtils
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import org.mariotaku.twidere.model.util.ParcelableStatusUtils
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import org.mariotaku.twidere.task.twitter.GetStatusesTask
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import org.mariotaku.twidere.util.*
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import org.mariotaku.twidere.util.dagger.GeneralComponentHelper
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import java.io.IOException
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import java.util.*
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import java.util.concurrent.CopyOnWriteArrayList
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import java.util.concurrent.Executors
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import java.util.concurrent.atomic.AtomicReference
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import javax.inject.Inject
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abstract class MicroBlogAPIStatusesLoader(
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context: Context,
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val accountKey: UserKey?,
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val sinceId: String?,
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val maxId: String?,
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val page: Int,
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adapterData: List<ParcelableStatus>?,
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private val savedStatusesArgs: Array<String>?,
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tabPosition: Int,
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fromUser: Boolean,
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private val loadingMore: Boolean
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) : ParcelableStatusesLoader(context, adapterData, tabPosition, fromUser) {
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// Statuses sorted descending by default
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var comparator: Comparator<ParcelableStatus>? = ParcelableStatus.REVERSE_COMPARATOR
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private val exceptionRef = AtomicReference<MicroBlogException?>()
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var exception: MicroBlogException?
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get() = exceptionRef.get()
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private set(value) {
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exceptionRef.set(value)
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}
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@Inject
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lateinit var fileCache: DiskCache
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@Inject
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lateinit var preferences: SharedPreferencesWrapper
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@Inject
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lateinit var userColorNameManager: UserColorNameManager
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init {
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GeneralComponentHelper.build(context).inject(this)
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}
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@SuppressWarnings("unchecked")
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override fun loadInBackground(): ListResponse<ParcelableStatus> {
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val context = context
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val accountKey = accountKey ?: return ListResponse.getListInstance<ParcelableStatus>(MicroBlogException("No Account"))
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val details = AccountUtils.getAccountDetails(AccountManager.get(context), accountKey, true) ?:
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return ListResponse.getListInstance<ParcelableStatus>(MicroBlogException("No Account"))
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var data: MutableList<ParcelableStatus>? = data
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if (data == null) {
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data = CopyOnWriteArrayList<ParcelableStatus>()
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}
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if (isFirstLoad && tabPosition >= 0) {
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val cached = cachedData
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if (cached != null) {
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data.addAll(cached)
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if (comparator != null) {
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Collections.sort(data, comparator)
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} else {
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Collections.sort(data)
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}
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return ListResponse.getListInstance(CopyOnWriteArrayList(data))
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}
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}
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if (!fromUser) return ListResponse.getListInstance(data)
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val microBlog = details.newMicroBlogInstance(context = context, cls = MicroBlog::class.java)
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val statuses: List<Status>
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val noItemsBefore = data.isEmpty()
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val loadItemLimit = preferences.getInt(KEY_LOAD_ITEM_LIMIT, DEFAULT_LOAD_ITEM_LIMIT)
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try {
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val paging = Paging()
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processPaging(details, loadItemLimit, paging)
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statuses = getStatuses(microBlog, details, paging)
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} catch (e: MicroBlogException) {
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// mHandler.post(new ShowErrorRunnable(e));
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exception = e
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if (BuildConfig.DEBUG) {
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Log.w(LOGTAG, e)
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}
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return ListResponse.getListInstance(CopyOnWriteArrayList(data), e)
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}
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val statusIds = arrayOfNulls<String>(statuses.size)
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var minIdx = -1
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var rowsDeleted = 0
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for (i in 0 until statuses.size) {
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val status = statuses[i]
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if (minIdx == -1 || status < statuses[minIdx]) {
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minIdx = i
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}
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statusIds[i] = status.id
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if (deleteStatus(data, status.id)) {
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rowsDeleted++
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}
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}
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// Insert a gap.
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val deletedOldGap = rowsDeleted > 0 && statusIds.contains(maxId)
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val noRowsDeleted = rowsDeleted == 0
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val insertGap = minIdx != -1 && (noRowsDeleted || deletedOldGap) && !noItemsBefore
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&& statuses.size >= loadItemLimit && !loadingMore
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if (statuses.isNotEmpty()) {
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val firstSortId = statuses.first().sortId
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val lastSortId = statuses.last().sortId
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// Get id diff of first and last item
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val sortDiff = firstSortId - lastSortId
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for (i in 0 until statuses.size) {
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val status = statuses[i]
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val item = ParcelableStatusUtils.fromStatus(status, accountKey, insertGap && isGapEnabled && minIdx == i)
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item.position_key = GetStatusesTask.getPositionKey(item.timestamp, item.sort_id, lastSortId,
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sortDiff, i, statuses.size)
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ParcelableStatusUtils.updateExtraInformation(item, details)
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data.add(item)
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}
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}
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val db = TwidereApplication.getInstance(context).sqLiteDatabase
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val array = data.toTypedArray()
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val size = array.size
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for (i in (0 until size)) {
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val status = array[i]
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val filtered = shouldFilterStatus(db, status)
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if (filtered) {
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if (!status.is_gap && i != size - 1) {
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data.remove(status)
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} else {
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status.is_filtered = true
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}
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}
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}
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if (comparator != null) {
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data.sortWith(comparator!!)
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} else {
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data.sort()
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}
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saveCachedData(data)
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return ListResponse.getListInstance(CopyOnWriteArrayList(data))
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}
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@Throws(MicroBlogException::class)
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protected abstract fun getStatuses(microBlog: MicroBlog,
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details: AccountDetails,
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paging: Paging): List<Status>
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@WorkerThread
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protected abstract fun shouldFilterStatus(database: SQLiteDatabase, status: ParcelableStatus): Boolean
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override fun onStartLoading() {
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exception = null
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super.onStartLoading()
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}
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protected open fun processPaging(details: AccountDetails, loadItemLimit: Int, paging: Paging) {
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paging.setCount(loadItemLimit)
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if (maxId != null) {
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paging.setMaxId(maxId)
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}
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if (sinceId != null) {
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paging.setSinceId(sinceId)
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if (maxId == null) {
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paging.setLatestResults(true)
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}
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}
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}
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protected open val isGapEnabled: Boolean
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get() = true
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private val cachedData: List<ParcelableStatus>?
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get() {
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val key = serializationKey ?: return null
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val file = fileCache.get(key) ?: return null
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return JsonSerializer.parseList(file, ParcelableStatus::class.java)
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}
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private val serializationKey: String?
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get() {
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if (savedStatusesArgs == null) return null
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return TwidereArrayUtils.toString(savedStatusesArgs, '_', false)
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}
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private fun saveCachedData(data: List<ParcelableStatus>?) {
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val key = serializationKey
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if (key == null || data == null) return
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val databaseItemLimit = preferences[loadItemLimitKey]
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try {
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val statuses = data.subList(0, Math.min(databaseItemLimit, data.size))
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fileCache.save(key, tempFileInputStream(context) { os ->
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LoganSquare.serialize(statuses, os, ParcelableStatus::class.java)
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}) { current, total -> true }
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} catch (e: Exception) {
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// Ignore
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if (e !is IOException) {
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DebugLog.w(LOGTAG, "Error saving cached data", e)
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}
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}
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}
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companion object {
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private val pool = Executors.newSingleThreadExecutor()
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}
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}
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