WIP keep last_message updated

src/modules/chats.js

@@ -64,7 +64,7 @@ const chats = {
       dispatch('addNewUsers', [chat.account])
     },
     addChatMessages ({ commit }, value) {
-      commit('addChatMessages', value)
+      commit('addChatMessages', { commit, ...value })
     },
     setChatFocused ({ commit }, value) {
       commit('setChatFocused', value)
@@ -90,7 +90,7 @@ const chats = {
     },
     deleteChatMessage ({ rootState, commit, dispatch }, value) {
       rootState.api.backendInteractor.deleteChatMessage(value)
-      commit('deleteChatMessage', value)
+      commit('deleteChatMessage', { commit, ...value })
     }
   },
   mutations: {
@@ -152,16 +152,27 @@ const chats = {
     setChatsLoading (state, { value }) {
       state.chats.loading = value
     },
-    addChatMessages (state, { chatId, messages }) {
+    addChatMessages (state, { commit, chatId, messages }) {
       const chatMessageService = state.openedChatMessageServices[chatId]
       if (chatMessageService) {
         chatService.add(chatMessageService, { messages: messages.map(parseChatMessage) })
+        commit('refreshLastMessage', { commit, chatId })
       }
     },
-    deleteChatMessage (state, { chatId, messageId }) {
+    refreshLastMessage (state, { chatId }) {
+      const chatMessageService = state.openedChatMessageServices[chatId]
+      if (chatMessageService) {
+        const chat = state.chatList.data.find(c => c.id === chatId)
+        if (chat) {
+          chat.lastMessage = chatMessageService.lastMessage
+        }
+      }
+    },
+    deleteChatMessage (state, { commit, chatId, messageId }) {
       const chatMessageService = state.openedChatMessageServices[chatId]
       if (chatMessageService) {
         chatService.deleteMessage(chatMessageService, messageId)
+        commit('refreshLastMessage', { commit, chatId })
       }
     },
     resetChatNewMessageCount (state, _value) {

src/services/chat_service/chat_service.js

@@ -7,7 +7,8 @@ const empty = (chatId) => {
     newMessageCount: 0,
     lastSeenTimestamp: 0,
     chatId: chatId,
-    minId: undefined
+    minId: undefined,
+    lastMessage: undefined
   }
 }
 
@@ -15,6 +16,14 @@ const deleteMessage = (storage, messageId) => {
   if (!storage) { return }
   storage.messages = storage.messages.filter(m => m.id !== messageId)
   delete storage.idIndex[messageId]
+
+  if (storage.lastMessage && (storage.lastMessage.id === messageId)) {
+    storage.lastMessage = _.maxBy(storage.messages, 'id')
+  }
+
+  if (storage.minId === messageId) {
+    storage.minId = _.minBy(storage.messages, 'id')
+  }
 }
 
 const add = (storage, { messages: newMessages }) => {
@@ -29,6 +38,10 @@ const add = (storage, { messages: newMessages }) => {
       storage.minId = message.id
     }
 
+    if (!storage.lastMessage || message.id > storage.lastMessage.id) {
+      storage.lastMessage = message
+    }
+
     if (!storage.idIndex[message.id]) {
       if (storage.lastSeenTimestamp < message.created_at) {
         storage.newMessageCount++