forked from melod1n/fast-messenger
refactor: extract message loading
This commit is contained in:
Codex
+140
@@ -0,0 +1,140 @@
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package dev.meloda.fast.messageshistory
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import android.util.Log
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import dev.meloda.fast.common.VkConstants
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import dev.meloda.fast.common.extensions.listenValue
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import dev.meloda.fast.common.extensions.orDots
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import dev.meloda.fast.common.extensions.setValue
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import dev.meloda.fast.common.paging.canPaginate as canPaginatePage
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import dev.meloda.fast.common.paging.isPaginationExhausted as isPaginationExhaustedPage
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import dev.meloda.fast.common.paging.loadingFlags
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import dev.meloda.fast.common.paging.mergePage
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import dev.meloda.fast.common.provider.ResourceProvider
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import dev.meloda.fast.data.State
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import dev.meloda.fast.data.VkUtils
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import dev.meloda.fast.data.processState
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import dev.meloda.fast.datastore.AppSettings
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import dev.meloda.fast.domain.ConvoUseCase
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import dev.meloda.fast.domain.MessagesUseCase
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import dev.meloda.fast.domain.util.extractAvatar
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import dev.meloda.fast.domain.util.extractTitle
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import dev.meloda.fast.messageshistory.model.MessagesHistoryScreenState
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import dev.meloda.fast.model.BaseError
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import dev.meloda.fast.model.api.domain.VkMessage
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.flow.MutableStateFlow
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internal class MessagesHistoryLoaders(
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private val convoUseCase: ConvoUseCase,
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private val messagesUseCase: MessagesUseCase,
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private val resourceProvider: ResourceProvider,
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private val screenState: MutableStateFlow<MessagesHistoryScreenState>,
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private val messages: MutableStateFlow<List<VkMessage>>,
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private val imagesToPreload: MutableStateFlow<List<String>>,
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private val canPaginate: MutableStateFlow<Boolean>,
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private val baseError: MutableStateFlow<BaseError?>,
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private val scope: CoroutineScope,
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private val syncUiMessages: () -> Unit,
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private val onPinnedMessage: (VkMessage?) -> Unit,
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) {
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fun loadConvo() {
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Log.d("MessagesHistoryViewModelImpl", "loadConvo()")
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convoUseCase.getById(
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peerIds = listOf(screenState.value.convoId),
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extended = true,
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fields = VkConstants.ALL_FIELDS
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).listenValue(scope) { state ->
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state.processState(
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error = ::handleError,
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success = { response ->
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val convo = response.firstOrNull() ?: return@listenValue
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val title = convo.extractTitle(
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useContactName = AppSettings.General.useContactNames,
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resources = resourceProvider.resources
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)
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val avatar = convo.extractAvatar()
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screenState.setValue { old ->
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old.copy(
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convo = convo,
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title = title,
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avatar = avatar
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)
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}
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onPinnedMessage(convo.pinnedMessage)
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}
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)
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}
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}
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fun loadMessagesHistory(offset: Int) {
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Log.d("MessagesHistoryViewModel", "loadMessagesHistory: $offset")
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messagesUseCase.getMessagesHistory(
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convoId = screenState.value.convoId,
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count = MessagesHistoryViewModelImpl.MESSAGES_LOAD_COUNT,
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offset = offset,
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).listenValue(scope) { state ->
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state.processState(
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error = ::handleError,
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success = { response ->
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val messages = response.messages
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val fullMessages = mergePage(this.messages.value, messages, offset)
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.sorted()
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imagesToPreload.setValue {
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messages.mapNotNull { it.extractAvatar().extractUrl() }
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}
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messagesUseCase.storeMessages(messages)
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convoUseCase.storeConvos(response.convos)
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val itemsCountSufficient = canPaginatePage(
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MessagesHistoryViewModelImpl.MESSAGES_LOAD_COUNT,
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messages.size
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)
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val paginationExhausted = isPaginationExhaustedPage(
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pageSize = MessagesHistoryViewModelImpl.MESSAGES_LOAD_COUNT,
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loadedCount = messages.size,
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hasExistingItems = this.messages.value.isNotEmpty()
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)
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screenState.setValue { old ->
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old.copy(isPaginationExhausted = paginationExhausted)
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}
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this.messages.emit(fullMessages)
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syncUiMessages()
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canPaginate.setValue { itemsCountSufficient }
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}
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)
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val flags = loadingFlags(offset, state.isLoading())
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screenState.setValue { old ->
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old.copy(
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isLoading = flags.isLoading,
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isPaginating = flags.isPaginating
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)
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}
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}
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}
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private fun handleError(error: State.Error) {
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VkUtils.parseError(error)?.let { newBaseError ->
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baseError.setValue { newBaseError }
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}
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}
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private fun List<VkMessage>.sorted(): List<VkMessage> {
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return sortedWith { m1, m2 ->
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val dateDiff = m2.date - m1.date
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if (dateDiff != 0) {
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dateDiff
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} else {
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val idDiff = m2.id - m1.id
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idDiff.toInt()
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}
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}
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}
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}
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+19
-117
@@ -2,35 +2,23 @@ package dev.meloda.fast.messageshistory
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import android.content.Context
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import android.os.Bundle
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import android.util.Log
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import androidx.compose.ui.text.buildAnnotatedString
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import androidx.compose.ui.text.TextRange
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import androidx.compose.ui.text.input.TextFieldValue
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import androidx.lifecycle.SavedStateHandle
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import androidx.lifecycle.ViewModel
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import androidx.lifecycle.viewModelScope
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import com.conena.nanokt.collections.indexOfFirstOrNull
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import dev.meloda.fast.common.VkConstants
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import dev.meloda.fast.common.extensions.getParcelableCompat
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import dev.meloda.fast.common.extensions.listenValue
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import dev.meloda.fast.common.extensions.orDots
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import dev.meloda.fast.common.extensions.setValue
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import dev.meloda.fast.common.provider.ResourceProvider
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import dev.meloda.fast.common.paging.canPaginate as canPaginatePage
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import dev.meloda.fast.common.paging.isPaginationExhausted as isPaginationExhaustedPage
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import dev.meloda.fast.common.paging.loadingFlags
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import dev.meloda.fast.common.paging.mergePage
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import dev.meloda.fast.data.State
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import dev.meloda.fast.data.VkUtils
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import dev.meloda.fast.data.VkMemoryCache
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import dev.meloda.fast.data.processState
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import dev.meloda.fast.datastore.AppSettings
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import dev.meloda.fast.domain.ConvoUseCase
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import dev.meloda.fast.domain.GetMessageReadPeersUseCase
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import dev.meloda.fast.domain.LoadConvosByIdUseCase
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import dev.meloda.fast.domain.LongPollUpdatesParser
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import dev.meloda.fast.domain.MessagesUseCase
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import dev.meloda.fast.domain.util.extractAvatar
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import dev.meloda.fast.domain.util.extractTitle
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import dev.meloda.fast.messageshistory.model.ActionMode
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import dev.meloda.fast.messageshistory.model.MessageDialog
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import dev.meloda.fast.messageshistory.model.MessageNavigation
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@@ -52,7 +40,6 @@ class MessagesHistoryViewModelImpl(
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private val messagesUseCase: MessagesUseCase,
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private val convoUseCase: ConvoUseCase,
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private val resourceProvider: ResourceProvider,
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private val loadConvosByIdUseCase: LoadConvosByIdUseCase,
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private val getMessageReadPeersUseCase: GetMessageReadPeersUseCase,
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updatesParser: LongPollUpdatesParser,
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savedStateHandle: SavedStateHandle
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@@ -91,6 +78,20 @@ class MessagesHistoryViewModelImpl(
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onPinnedMessageChanged = ::handlePinnedMessage
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)
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private val loaders = MessagesHistoryLoaders(
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convoUseCase = convoUseCase,
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messagesUseCase = messagesUseCase,
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resourceProvider = resourceProvider,
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screenState = screenState,
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messages = messages,
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imagesToPreload = imagesToPreload,
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canPaginate = canPaginate,
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baseError = baseError,
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scope = viewModelScope,
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syncUiMessages = ::syncUiMessages,
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onPinnedMessage = ::handlePinnedMessage
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)
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private val longPollEventHandler = MessagesHistoryLongPollEventHandler(
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screenState = screenState,
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messages = messages
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@@ -103,8 +104,8 @@ class MessagesHistoryViewModelImpl(
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screenState.setValue { old -> old.copy(convoId = arguments.convoId) }
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loadConvo()
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loadMessagesHistory()
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loaders.loadConvo()
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loaders.loadMessagesHistory(currentOffset.value)
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updatesParser.onNewMessage(longPollEventHandler::onNewMessage)
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updatesParser.onMessageEdited(longPollEventHandler::onMessageEdited)
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@@ -311,7 +312,7 @@ class MessagesHistoryViewModelImpl(
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}
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override fun onRefresh() {
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loadMessagesHistory(offset = 0)
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loaders.loadMessagesHistory(offset = 0)
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}
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override fun onAttachmentButtonClicked() {
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@@ -370,7 +371,7 @@ class MessagesHistoryViewModelImpl(
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override fun onPaginationConditionsMet() {
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currentOffset.update { messages.value.size }
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loadMessagesHistory()
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loaders.loadMessagesHistory(currentOffset.value)
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}
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override fun onMessageClicked(messageId: Long) {
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@@ -496,38 +497,6 @@ class MessagesHistoryViewModelImpl(
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}
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}
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private fun loadConvo() {
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Log.d("MessagesHistoryViewModelImpl", "loadConvo()")
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loadConvosByIdUseCase(
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peerIds = listOf(screenState.value.convoId),
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extended = true,
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fields = VkConstants.ALL_FIELDS
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).listenValue(viewModelScope) { state ->
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state.processState(
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error = ::handleError,
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success = { response ->
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val convo = response.firstOrNull() ?: return@listenValue
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val title = convo.extractTitle(
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useContactName = AppSettings.General.useContactNames,
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resources = resourceProvider.resources
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)
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val avatar = convo.extractAvatar()
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screenState.setValue { old ->
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old.copy(
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convo = convo,
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title = title,
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avatar = avatar
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)
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}
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convo.pinnedMessage?.let(::handlePinnedMessage)
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}
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)
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}
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}
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private fun handlePinnedMessage(pinnedMessage: VkMessage?) {
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if (pinnedMessage == null) {
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screenState.setValue { old ->
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@@ -565,73 +534,6 @@ class MessagesHistoryViewModelImpl(
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}
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}
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private fun loadMessagesHistory(offset: Int = currentOffset.value) {
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Log.d("MessagesHistoryViewModel", "loadMessagesHistory: $offset")
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messagesUseCase.getMessagesHistory(
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convoId = screenState.value.convoId,
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count = MESSAGES_LOAD_COUNT,
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offset = offset,
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).listenValue(viewModelScope) { state ->
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state.processState(
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error = ::handleError,
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success = { response ->
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val messages = response.messages
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val fullMessages = mergePage(this.messages.value, messages, offset).sorted()
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val convos = response.convos
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imagesToPreload.setValue {
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messages.mapNotNull { it.extractAvatar().extractUrl() }
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}
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messagesUseCase.storeMessages(messages)
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convoUseCase.storeConvos(convos)
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val itemsCountSufficient = canPaginatePage(MESSAGES_LOAD_COUNT, messages.size)
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val paginationExhausted = isPaginationExhaustedPage(
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pageSize = MESSAGES_LOAD_COUNT,
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loadedCount = messages.size,
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hasExistingItems = this.messages.value.isNotEmpty()
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)
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screenState.setValue { old ->
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old.copy(isPaginationExhausted = paginationExhausted)
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}
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this.messages.emit(fullMessages)
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syncUiMessages()
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canPaginate.setValue { itemsCountSufficient }
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}
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)
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val flags = loadingFlags(offset, state.isLoading())
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screenState.setValue { old ->
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old.copy(
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isLoading = flags.isLoading,
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isPaginating = flags.isPaginating
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)
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}
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}
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}
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private fun handleError(error: State.Error) {
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VkUtils.parseError(error)?.let { newBaseError ->
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baseError.setValue { newBaseError }
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}
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}
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private fun List<VkMessage>.sorted(): List<VkMessage> {
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return sortedWith { m1, m2 ->
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val dateDiff = m2.date - m1.date
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if (dateDiff != 0) {
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dateDiff
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} else {
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val idDiff = m2.id - m1.id
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idDiff.toInt()
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}
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}
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}
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private fun syncUiMessages(): List<MessageUiItem> {
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val newUiMessages = buildMessagesHistoryUiMessages(
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messages = messages.value,
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