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143 lines
5.2 KiB
Kotlin
143 lines
5.2 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.messaging.state
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.launch
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import mozilla.components.lib.state.Middleware
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import mozilla.components.lib.state.MiddlewareContext
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import mozilla.components.service.nimbus.messaging.Message
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import mozilla.components.service.nimbus.messaging.NimbusMessagingControllerInterface
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import org.mozilla.fenix.components.appstate.AppAction
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.ConsumeMessageToShow
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.Evaluate
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.MessageClicked
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.MessageDismissed
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.Restore
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.UpdateMessageToShow
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import org.mozilla.fenix.components.appstate.AppAction.MessagingAction.UpdateMessages
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import org.mozilla.fenix.components.appstate.AppState
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typealias AppStoreMiddlewareContext = MiddlewareContext<AppState, AppAction>
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class MessagingMiddleware(
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private val controller: NimbusMessagingControllerInterface,
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private val coroutineScope: CoroutineScope = CoroutineScope(Dispatchers.IO),
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) : Middleware<AppState, AppAction> {
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override fun invoke(
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context: AppStoreMiddlewareContext,
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next: (AppAction) -> Unit,
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action: AppAction,
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) {
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when (action) {
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is Restore -> {
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coroutineScope.launch {
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val messages = controller.getMessages()
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context.store.dispatch(UpdateMessages(messages))
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}
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}
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is Evaluate -> {
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val message = controller.getNextMessage(
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action.surface,
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context.state.messaging.messages,
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)
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if (message != null) {
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context.store.dispatch(UpdateMessageToShow(message))
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onMessagedDisplayed(message, context)
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} else {
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context.store.dispatch(ConsumeMessageToShow(action.surface))
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}
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}
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is MessageClicked -> onMessageClicked(action.message, context)
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is MessageDismissed -> onMessageDismissed(context, action.message)
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else -> {
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// no-op
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}
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}
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next(action)
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}
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private fun onMessagedDisplayed(
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oldMessage: Message,
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context: AppStoreMiddlewareContext,
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) {
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coroutineScope.launch {
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val newMessage = controller.onMessageDisplayed(oldMessage)
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val newMessages = if (!newMessage.isExpired) {
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updateMessage(context, oldMessage, newMessage)
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} else {
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consumeMessageToShowIfNeeded(context, oldMessage)
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removeMessage(context, oldMessage)
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}
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context.store.dispatch(UpdateMessages(newMessages))
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}
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}
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private fun onMessageDismissed(
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context: AppStoreMiddlewareContext,
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message: Message,
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) {
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val newMessages = removeMessage(context, message)
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context.store.dispatch(UpdateMessages(newMessages))
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consumeMessageToShowIfNeeded(context, message)
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coroutineScope.launch {
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controller.onMessageDismissed(message)
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}
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}
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private fun onMessageClicked(
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message: Message,
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context: AppStoreMiddlewareContext,
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) {
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// Update Nimbus storage.
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coroutineScope.launch {
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controller.onMessageClicked(message)
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}
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// Update app state.
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val newMessages = removeMessage(context, message)
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context.store.dispatch(UpdateMessages(newMessages))
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consumeMessageToShowIfNeeded(context, message)
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}
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private fun consumeMessageToShowIfNeeded(
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context: AppStoreMiddlewareContext,
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message: Message,
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) {
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val current = context.state.messaging.messageToShow[message.surface]
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if (current?.id == message.id) {
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context.store.dispatch(ConsumeMessageToShow(message.surface))
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}
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}
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private fun removeMessage(
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context: AppStoreMiddlewareContext,
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message: Message,
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): List<Message> {
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return context.state.messaging.messages.filter { it.id != message.id }
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}
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private fun updateMessage(
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context: AppStoreMiddlewareContext,
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oldMessage: Message,
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updatedMessage: Message,
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): List<Message> {
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val actualMessageToShow = context.state.messaging.messageToShow[updatedMessage.surface]
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if (actualMessageToShow?.id == oldMessage.id) {
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context.store.dispatch(UpdateMessageToShow(updatedMessage))
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}
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val oldMessageIndex = context.state.messaging.messages.indexOfFirst { it.id == updatedMessage.id }
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val newList = context.state.messaging.messages.toMutableList()
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newList[oldMessageIndex] = updatedMessage
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return newList
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}
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}
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