235 lines
8.8 KiB
Kotlin
235 lines
8.8 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2017 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.statuses
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import android.accounts.AccountManager
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import android.content.Context
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import android.content.SharedPreferences
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import android.support.annotation.WorkerThread
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import org.mariotaku.kpreferences.get
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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.R
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import org.mariotaku.twidere.TwidereConstants.LOGTAG
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import org.mariotaku.twidere.constant.loadItemLimitKey
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import org.mariotaku.twidere.extension.model.api.applyLoadLimit
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import org.mariotaku.twidere.loader.iface.IPaginationLoader
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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.pagination.PaginatedArrayList
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import org.mariotaku.twidere.model.pagination.PaginatedList
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import org.mariotaku.twidere.model.pagination.Pagination
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import org.mariotaku.twidere.model.pagination.SinceMaxPagination
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import org.mariotaku.twidere.model.util.AccountUtils
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import org.mariotaku.twidere.task.twitter.GetStatusesTask
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import org.mariotaku.twidere.util.DebugLog
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import org.mariotaku.twidere.util.UserColorNameManager
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import org.mariotaku.twidere.util.cache.JsonCache
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import org.mariotaku.twidere.util.dagger.GeneralComponent
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import java.io.IOException
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import java.util.*
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import java.util.concurrent.atomic.AtomicReference
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import javax.inject.Inject
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abstract class AbsRequestStatusesLoader(
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context: Context,
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val accountKey: UserKey?,
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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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protected val loadingMore: Boolean
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) : ParcelableStatusesLoader(context, adapterData, tabPosition, fromUser), IPaginationLoader {
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// Statuses sorted descending by default
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open val comparator: Comparator<ParcelableStatus>? = ParcelableStatus.REVERSE_COMPARATOR
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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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override var pagination: Pagination? = null
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override var nextPagination: Pagination? = null
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protected set
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override var prevPagination: Pagination? = null
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protected set
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protected open val isGapEnabled: Boolean = true
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protected val profileImageSize: String = context.getString(R.string.profile_image_size)
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@Inject
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lateinit var jsonCache: JsonCache
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@Inject
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lateinit var preferences: SharedPreferences
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@Inject
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lateinit var userColorNameManager: UserColorNameManager
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private val exceptionRef = AtomicReference<MicroBlogException?>()
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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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return jsonCache.getList(key, ParcelableStatus::class.java)
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}
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private val serializationKey: String?
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get() = savedStatusesArgs?.joinToString("_")
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init {
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GeneralComponent.get(context).inject(this)
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}
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@SuppressWarnings("unchecked")
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final override fun loadInBackground(): ListResponse<ParcelableStatus> {
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val context = context
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val comparator = this.comparator
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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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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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data.sortWith(comparator)
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} else {
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data.sort()
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}
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data.forEach { it.is_filtered = shouldFilterStatus(it) }
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return ListResponse.getListInstance(data)
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}
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}
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if (!fromUser) {
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data.forEach { it.is_filtered = shouldFilterStatus(it) }
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return ListResponse.getListInstance(data)
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}
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val noItemsBefore = data.isEmpty()
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val loadItemLimit = preferences[loadItemLimitKey]
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val statuses = try {
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val paging = Paging().apply {
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processPaging(this, details, loadItemLimit)
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}
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getStatuses(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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DebugLog.w(tr = e)
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return ListResponse.getListInstance(data, e)
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}
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nextPagination = statuses.nextPage
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prevPagination = statuses.previousPage
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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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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 && statuses.foundInPagination()
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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().sort_id
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val lastSortId = statuses.last().sort_id
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// Get id diff of first and last item
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val sortDiff = firstSortId - lastSortId
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statuses.forEachIndexed { i, status ->
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status.is_gap = insertGap && isGapEnabled && minIdx == i
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status.position_key = GetStatusesTask.getPositionKey(status.timestamp, status.sort_id,
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lastSortId, sortDiff, i, statuses.size)
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}
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data.addAll(statuses)
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}
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data.forEach { it.is_filtered = shouldFilterStatus(it) }
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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(data)
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}
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final override fun onStartLoading() {
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exception = null
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super.onStartLoading()
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}
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@WorkerThread
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protected abstract fun shouldFilterStatus(status: ParcelableStatus): Boolean
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protected open fun processPaging(paging: Paging, details: AccountDetails, loadItemLimit: Int) {
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paging.applyLoadLimit(details, loadItemLimit)
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pagination?.applyTo(paging)
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}
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protected open fun List<ParcelableStatus>.foundInPagination(): Boolean {
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val pagination = this@AbsRequestStatusesLoader.pagination
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return when (pagination) {
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is SinceMaxPagination -> return any { it.id == pagination.maxId }
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else -> false
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}
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}
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@Throws(MicroBlogException::class)
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protected abstract fun getStatuses(account: AccountDetails, paging: Paging): PaginatedList<ParcelableStatus>
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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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jsonCache.saveList(key, statuses, ParcelableStatus::class.java)
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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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inline fun <R> List<Status>.mapMicroBlogToPaginated(transform: (Status) -> R): PaginatedList<R> {
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val result = mapTo(PaginatedArrayList(size), transform)
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result.nextPage = SinceMaxPagination().apply { maxId = lastOrNull()?.id }
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return result
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}
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}
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}
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