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Remove unused ConversationPager

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Andrew 2024-06-18 21:12:49 +09:30
parent 2fc686ce73
commit 5e1b5b393c
1 changed files with 0 additions and 129 deletions
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app/src/main/java/org/thoughtcrime/securesms/conversation/paging/ConversationPager.kt
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package org.thoughtcrime.securesms.conversation.paging
import androidx.annotation.WorkerThread
import androidx.paging.Pager
import androidx.paging.PagingConfig
import androidx.paging.PagingSource
import androidx.paging.PagingState
import androidx.recyclerview.widget.DiffUtil
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import org.session.libsession.messaging.contacts.Contact
import org.thoughtcrime.securesms.database.MmsSmsDatabase
import org.thoughtcrime.securesms.database.SessionContactDatabase
import org.thoughtcrime.securesms.database.model.MessageRecord
private const val TIME_BUCKET = 600000L // bucket into 10 minute increments
private fun config() = PagingConfig(
pageSize = 25,
maxSize = 100,
enablePlaceholders = false
)
fun Long.bucketed(): Long = (TIME_BUCKET - this % TIME_BUCKET) + this
fun conversationPager(threadId: Long, initialKey: PageLoad? = null, db: MmsSmsDatabase, contactDb: SessionContactDatabase) = Pager(config(), initialKey = initialKey) {
ConversationPagingSource(threadId, db, contactDb)
}
class ConversationPagerDiffCallback: DiffUtil.ItemCallback<MessageAndContact>() {
override fun areItemsTheSame(oldItem: MessageAndContact, newItem: MessageAndContact): Boolean =
oldItem.message.id == newItem.message.id && oldItem.message.isMms == newItem.message.isMms
override fun areContentsTheSame(oldItem: MessageAndContact, newItem: MessageAndContact): Boolean =
oldItem == newItem
}
data class MessageAndContact(val message: MessageRecord,
val contact: Contact?)
data class PageLoad(val fromTime: Long, val toTime: Long? = null)
class ConversationPagingSource(
private val threadId: Long,
private val messageDb: MmsSmsDatabase,
private val contactDb: SessionContactDatabase
): PagingSource<PageLoad, MessageAndContact>() {
override fun getRefreshKey(state: PagingState<PageLoad, MessageAndContact>): PageLoad? {
val anchorPosition = state.anchorPosition ?: return null
val anchorPage = state.closestPageToPosition(anchorPosition) ?: return null
val next = anchorPage.nextKey?.fromTime
val previous = anchorPage.prevKey?.fromTime ?: anchorPage.data.firstOrNull()?.message?.dateSent ?: return null
return PageLoad(previous, next)
}
private val contactCache = mutableMapOf<String, Contact>()
@WorkerThread
private fun getContact(sessionId: String): Contact? {
contactCache[sessionId]?.let { contact ->
return contact
} ?: run {
contactDb.getContactWithSessionID(sessionId)?.let { contact ->
contactCache[sessionId] = contact
return contact
}
}
return null
}
override suspend fun load(params: LoadParams<PageLoad>): LoadResult<PageLoad, MessageAndContact> {
val pageLoad = params.key ?: withContext(Dispatchers.IO) {
messageDb.getConversationSnippet(threadId).use {
val reader = messageDb.readerFor(it)
var record: MessageRecord? = null
if (reader != null) {
record = reader.next
while (record != null && record.isDeleted) {
record = reader.next
}
}
record?.dateSent?.let { fromTime ->
PageLoad(fromTime)
}
}
} ?: return LoadResult.Page(emptyList(), null, null)
val result = withContext(Dispatchers.IO) {
val cursor = messageDb.getConversationPage(
threadId,
pageLoad.fromTime,
pageLoad.toTime ?: -1L,
params.loadSize
)
val processedList = mutableListOf<MessageAndContact>()
val reader = messageDb.readerFor(cursor)
while (reader.next != null && !invalid) {
reader.current?.let { item ->
val contact = getContact(item.individualRecipient.address.serialize())
processedList += MessageAndContact(item, contact)
}
}
reader.close()
processedList.toMutableList()
}
val hasNext = withContext(Dispatchers.IO) {
if (result.isEmpty()) return@withContext false
val lastTime = result.last().message.dateSent
messageDb.hasNextPage(threadId, lastTime)
}
val nextCheckTime = if (hasNext) {
val lastSent = result.last().message.dateSent
if (lastSent == pageLoad.fromTime) null else lastSent
} else null
val hasPrevious = withContext(Dispatchers.IO) { messageDb.hasPreviousPage(threadId, pageLoad.fromTime) }
val nextKey = if (!hasNext) null else nextCheckTime
val prevKey = if (!hasPrevious) null else messageDb.getPreviousPage(threadId, pageLoad.fromTime, params.loadSize)
return LoadResult.Page(
data = result, // next check time is not null if drop is true
prevKey = prevKey?.let { PageLoad(it, pageLoad.fromTime) },
nextKey = nextKey?.let { PageLoad(it) }
)
}
}