52 lines
1.8 KiB
Kotlin
52 lines
1.8 KiB
Kotlin
package com.keylesspalace.tusky.components.conversation
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import androidx.paging.ExperimentalPagingApi
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import androidx.paging.LoadType
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import androidx.paging.PagingState
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import androidx.paging.RemoteMediator
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import com.keylesspalace.tusky.db.AppDatabase
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import com.keylesspalace.tusky.network.MastodonApi
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@ExperimentalPagingApi
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class ConversationsRemoteMediator(
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private val accountId: Long,
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private val api: MastodonApi,
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private val db: AppDatabase
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) : RemoteMediator<Int, ConversationEntity>() {
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override suspend fun load(
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loadType: LoadType,
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state: PagingState<Int, ConversationEntity>
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): MediatorResult {
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try {
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val conversationsResult = when (loadType) {
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LoadType.REFRESH -> {
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api.getConversations(limit = state.config.initialLoadSize)
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}
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LoadType.PREPEND -> {
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return MediatorResult.Success(endOfPaginationReached = true)
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}
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LoadType.APPEND -> {
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val maxId = state.pages.findLast { it.data.isNotEmpty() }?.data?.lastOrNull()?.lastStatus?.id
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api.getConversations(maxId = maxId, limit = state.config.pageSize)
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}
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}
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if (loadType == LoadType.REFRESH) {
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db.conversationDao().deleteForAccount(accountId)
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}
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db.conversationDao().insert(
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conversationsResult
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.filterNot { it.lastStatus == null }
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.map { it.toEntity(accountId) }
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)
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return MediatorResult.Success(endOfPaginationReached = conversationsResult.isEmpty())
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} catch (e: Exception) {
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return MediatorResult.Error(e)
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}
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}
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override suspend fun initialize() = InitializeAction.LAUNCH_INITIAL_REFRESH
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}
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