Support edit messages

Closes #1155

app/js/controllers.js

@@ -502,6 +502,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       channelActions: false,
       canReply: false,
       canDelete: false,
+      canEdit: false,
       actions: function () {
         return $scope.historyState.selectActions ? 'selected' : ($scope.historyState.botActions ? 'bot' : ($scope.historyState.channelActions ? 'channel' : false))
       },
@@ -1130,6 +1131,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
     $scope.selectedDelete = selectedDelete
     $scope.selectedForward = selectedForward
     $scope.selectedReply = selectedReply
+    $scope.selectedEdit = selectedEdit
     $scope.selectedCancel = selectedCancel
     $scope.selectedFlush = selectedFlush
     $scope.selectInlineBot = selectInlineBot
@@ -1610,8 +1612,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
           }
           if (target.className &&
             target.className.indexOf('im_message_date') != -1) {
-            if (AppPeersManager.isChannel(peerID) &&
+            if (AppPeersManager.isBroadcast(peerID)) {
-                !AppPeersManager.isMegagroup(peerID)) {
               quickForward(messageID)
             } else {
               selectedReply(messageID)
@@ -1630,6 +1631,8 @@ angular.module('myApp.controllers', ['myApp.i18n'])
         }
 
         if (Config.Mobile) {
+          $scope.historyState.canEdit = AppMessagesManager.canEditMessage(messageID)
+          
           $modal.open({
             templateUrl: templateUrl('message_actions_modal'),
             windowClass: 'message_actions_modal_window',
@@ -1640,6 +1643,10 @@ angular.module('myApp.controllers', ['myApp.i18n'])
                 selectedReply(messageID)
                 break
 
+              case 'edit':
+                selectedEdit(messageID)
+                break
+
               case 'delete':
                 selectedDelete(messageID)
                 break
@@ -1704,6 +1711,11 @@ angular.module('myApp.controllers', ['myApp.i18n'])
           $scope.$broadcast('ui_panel_update')
         }
       }
+      if ($scope.selectedCount == 1) {
+        angular.forEach($scope.selectedMsgs, function (t, messageID) {
+          $scope.historyState.canEdit = AppMessagesManager.canEditMessage(messageID)
+        })
+      }
       $scope.$broadcast('messages_select')
     }
 
@@ -1813,6 +1825,18 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       }
     }
 
+    function selectedEdit (selectedMessageID) {
+      if (!selectedMessageID && $scope.selectedCount == 1) {
+        angular.forEach($scope.selectedMsgs, function (t, messageID) {
+          selectedMessageID = messageID
+        })
+      }
+      if (selectedMessageID) {
+        selectedCancel()
+        $scope.$broadcast('edit_selected', selectedMessageID)
+      }
+    }
+
     function toggleEdit () {
       if ($scope.historyState.selectActions) {
         selectedCancel()
@@ -2202,13 +2226,18 @@ angular.module('myApp.controllers', ['myApp.i18n'])
     $scope.$on('reply_selected', function (e, messageID) {
       replySelect(messageID, true)
     })
+    $scope.$on('edit_selected', function (e, messageID) {
+      setEditDraft(messageID, true)
+    })
+    
     $scope.$on('ui_typing', onTyping)
 
     $scope.draftMessage = {
       text: '',
-      send: sendMessage,
+      send: submitMessage,
       replyClear: replyClear,
-      fwdsClear: fwdsClear
+      fwdsClear: fwdsClear,
+      type: 'new'
     }
     $scope.mentions = {}
     $scope.commands = {}
@@ -2232,6 +2261,8 @@ angular.module('myApp.controllers', ['myApp.i18n'])
 
     $scope.$on('inline_bots_popular', updateMentions)
 
+    $scope.$on('last_message_edit', setEditLastMessage)
+
     $scope.replyKeyboardToggle = replyKeyboardToggle
     $scope.toggleSlash = toggleSlash
 
@@ -2257,38 +2288,58 @@ angular.module('myApp.controllers', ['myApp.i18n'])
 
     var replyToMarkup = false
     var forceDraft = false
+    var editMessageID = false
 
-    function sendMessage (e) {
+    function submitMessage (e) {
       $scope.$broadcast('ui_message_before_send')
 
       $timeout(function () {
-        var text = $scope.draftMessage.text
+        if (editMessageID) {
-
+          editMessage()
-        if (angular.isString(text) && text.length > 0) {
+        } else {
-          text = RichTextProcessor.parseEmojis(text)
+          sendMessage()
-
-          var options = {
-            replyToMsgID: $scope.draftMessage.replyToMsgID,
-            clearDraft: true
-          }
-          do {
-            AppMessagesManager.sendText($scope.curDialog.peerID, text.substr(0, 4096), options)
-            text = text.substr(4096)
-            options = angular.copy(options)
-            delete options.clearDraft
-          } while (text.length)
         }
-        fwdsSend()
+      })
 
-        if (forceDraft == $scope.curDialog.peer) {
+      return cancelEvent(e)
-          forceDraft = false
+    }
+
+    function sendMessage() {
+      var text = $scope.draftMessage.text
+
+      if (angular.isString(text) && text.length > 0) {
+        text = RichTextProcessor.parseEmojis(text)
+
+        var options = {
+          replyToMsgID: $scope.draftMessage.replyToMsgID,
+          clearDraft: true
         }
+        do {
+          AppMessagesManager.sendText($scope.curDialog.peerID, text.substr(0, 4096), options)
+          text = text.substr(4096)
+          options = angular.copy(options)
+          delete options.clearDraft
+        } while (text.length)
+      }
+      fwdsSend()
+
+      if (forceDraft == $scope.curDialog.peer) {
+        forceDraft = false
+      }
+
+      resetDraft()
+      $scope.$broadcast('ui_message_send')
+    }
+
+    function editMessage() {
+      var text = $scope.draftMessage.text
+
+      AppMessagesManager.editMessage(editMessageID, text).then(function () {
+        editMessageID = false
 
         resetDraft()
         $scope.$broadcast('ui_message_send')
       })
-
-      return cancelEvent(e)
     }
 
     function updateMentions () {
@@ -2402,6 +2453,8 @@ angular.module('myApp.controllers', ['myApp.i18n'])
         return
       }
 
+      editMessageID = false
+
       updateMentions()
       updateCommands()
       replyClear()
@@ -2413,7 +2466,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       // console.log(dT(), 'reset draft', $scope.curDialog.peer, forceDraft)
       if (forceDraft) {
         if (forceDraft == $scope.curDialog.peer) {
-          $scope.draftMessage.isBroadcast = AppPeersManager.isChannel($scope.curDialog.peerID) && !AppPeersManager.isMegagroup($scope.curDialog.peerID)
+          $scope.draftMessage.isBroadcast = AppPeersManager.isBroadcast($scope.curDialog.peerID)
           $scope.$broadcast('ui_peer_draft')
           return
         } else {
@@ -2427,9 +2480,25 @@ angular.module('myApp.controllers', ['myApp.i18n'])
 
     function getDraft () {
       if ($scope.curDialog.peerID) {
-        DraftsManager.getDraft($scope.curDialog.peerID).then(function (draftData) {
+        var draftDataPromise
+        if (editMessageID) {
+          draftDataPromise = AppMessagesManager.getMessageEditData(editMessageID).then(function (draftData) {
+            draftData.replyToMsgID = editMessageID
+            return draftData
+          }, function (error) {
+            console.warn(error)
+            editMessageID = false
+            getDraft()
+            return $q.reject()
+          })
+        } else {
+          draftDataPromise = DraftsManager.getDraft($scope.curDialog.peerID)
+        }
+        draftDataPromise.then(function (draftData) {
+          console.warn('draft', editMessageID, draftData)
+          $scope.draftMessage.type = editMessageID ? 'edit' : 'new'
           $scope.draftMessage.text = draftData ? draftData.text : ''
-          $scope.draftMessage.isBroadcast = AppPeersManager.isChannel($scope.curDialog.peerID) && !AppPeersManager.isMegagroup($scope.curDialog.peerID)
+          $scope.draftMessage.isBroadcast = AppPeersManager.isBroadcast($scope.curDialog.peerID)
           if (draftData.replyToMsgID) {
             var replyToMsgID = draftData.replyToMsgID
             replySelect(replyToMsgID)
@@ -2493,11 +2562,15 @@ angular.module('myApp.controllers', ['myApp.i18n'])
     }
 
     function replySelect (messageID, byUser) {
+      if (editMessageID && byUser) {
+        replyClear()
+        return
+      }
       $scope.draftMessage.replyToMsgID = messageID
       $scope.$broadcast('ui_peer_reply')
       replyToMarkup = false
 
-      if (byUser) {
+      if (byUser && !editMessageID) {
         DraftsManager.changeDraft($scope.curDialog.peerID, {
           text: $scope.draftMessage.text,
           replyToMsgID: messageID
@@ -2505,7 +2578,33 @@ angular.module('myApp.controllers', ['myApp.i18n'])
       }
     }
 
+    function setEditDraft(messageID) {
+      editMessageID = messageID
+      getDraft()
+    }
+
+    function setEditLastMessage() {
+      if (editMessageID ||
+          !$scope.curDialog.peerID) {
+        return false
+      }
+      AppMessagesManager.getHistory($scope.curDialog.peerID).then(function (historyResult) {
+        for (var i = 0, messageID; i < historyResult.history.length; i++) {
+          messageID = historyResult.history[i]
+          if (AppMessagesManager.canEditMessage(messageID)) {
+            setEditDraft(messageID)
+            break
+          }
+        }
+      })
+    }
+
     function replyClear (byUser) {
+      if (editMessageID) {
+        editMessageID = false
+        getDraft()
+        return
+      }
       var mid = $scope.draftMessage.replyToMsgID
       if (mid &&
         $scope.historyState.replyKeyboard &&
@@ -2608,16 +2707,18 @@ angular.module('myApp.controllers', ['myApp.i18n'])
         }
       }
       if ($scope.curDialog.peerID) {
-        var replyToMsgID = $scope.draftMessage.replyToMsgID
+        if (!editMessageID) {
-        if (replyToMsgID &&
+          var replyToMsgID = $scope.draftMessage.replyToMsgID
-            $scope.historyState.replyKeyboard &&
+          if (replyToMsgID &&
-            $scope.historyState.replyKeyboard.mid == replyToMsgID) {
+              $scope.historyState.replyKeyboard &&
-          replyToMsgID = 0;
+              $scope.historyState.replyKeyboard.mid == replyToMsgID) {
+            replyToMsgID = 0;
+          }
+          DraftsManager.changeDraft($scope.curDialog.peerID, {
+            text: newVal,
+            replyToMsgID: replyToMsgID
+          })
         }
-        DraftsManager.changeDraft($scope.curDialog.peerID, {
-          text: newVal,
-          replyToMsgID: replyToMsgID
-        })
         checkInlinePattern(newVal)
       }
     }
@@ -2685,8 +2786,7 @@ angular.module('myApp.controllers', ['myApp.i18n'])
     }
 
     function onTyping () {
-      if (AppPeersManager.isChannel($scope.curDialog.peerID) &&
+      if (AppPeersManager.isBroadcast($scope.curDialog.peerID)) {
-        !AppPeersManager.isMegagroup($scope.curDialog.peerID)) {
         return false
       }
       MtpApiManager.invokeApi('messages.setTyping', {

app/js/directives.js

@@ -527,16 +527,19 @@ angular.module('myApp.directives', ['myApp.filters'])
     function link ($scope, element, attrs) {
       if (attrs.watch) {
         $scope.$parent.$watch(attrs.myReplyMessage, function (mid) {
-          checkMessage($scope, element, mid)
+          var isEdit = $scope.$parent.$eval(attrs.edit)
+          checkMessage($scope, element, mid, isEdit)
         })
       } else {
         var mid = $scope.$parent.$eval(attrs.myReplyMessage)
-        checkMessage($scope, element, mid)
+        var isEdit = $scope.$parent.$eval(attrs.edit)
+        checkMessage($scope, element, mid, isEdit)
       }
     }
 
-    function checkMessage ($scope, element, mid) {
+    function checkMessage ($scope, element, mid, isEdit) {
       var message = $scope.replyMessage = AppMessagesManager.wrapSingleMessage(mid)
+      $scope.isEdit = isEdit || false
       if (message.loading) {
         var stopWaiting = $scope.$on('messages_downloaded', function (e, mids) {
           if (mids.indexOf(mid) != -1) {
@@ -667,6 +670,49 @@ angular.module('myApp.directives', ['myApp.filters'])
     }
   })
 
+  .directive('myMessageEdited', function (_, $timeout, AppMessagesManager) {
+
+    var editedLabel = _('message_edited')
+
+    return {
+      scope: {},
+      link: link
+    }
+
+    function link($scope, element, attrs) {
+      var messageID = $scope.$parent.$eval(attrs.myMessageEdited)
+      console.log(attrs.myMessageEdited, messageID)
+      if (checkEdited($scope, element, messageID)) {
+        $scope.$on('message_edit', function (e, data) {
+          var messageID = $scope.$parent.$eval(attrs.myMessageEdited)
+          if (data.mid == messageID) {
+            checkEdited($scope, element, messageID)
+          }
+        })
+      }
+    }
+
+    function checkEdited($scope, element, messageID) {
+      var message = AppMessagesManager.getMessage(messageID)
+      console.warn('check edited', messageID, message.canBeEdited, message.edit_date)
+      if (!message.canBeEdited) {
+        $timeout(function () {
+          $scope.$destroy()
+          element.remove()
+        })
+        return false
+      }
+      if (message.edit_date) {
+        element.html(editedLabel).show()
+        $timeout(function () {
+          $scope.$destroy()
+        })
+        return false
+      }
+      return true
+    }
+  })
+
   .directive('myDialogs', function ($modalStack, $transition, $window, $timeout) {
     return {
       link: link
@@ -1528,6 +1574,7 @@ angular.module('myApp.directives', ['myApp.filters'])
         mentions: $scope.mentions,
         commands: $scope.commands,
         onMessageSubmit: onMessageSubmit,
+        onDirectionKey: onDirectionKey,
         onInlineResultSend: onInlineResultSend,
         onFilePaste: onFilePaste,
         onCommandSend: function (command) {
@@ -1601,6 +1648,14 @@ angular.module('myApp.directives', ['myApp.filters'])
         })
       }
 
+      function onDirectionKey(e) {
+        if (e.keyCode == 38) {
+          $scope.$emit('last_message_edit')
+          return cancelEvent(e)
+        }
+        return true
+      }
+
       function updateValue () {
         if (richTextarea) {
           composer.onChange()

app/js/locales/en-us.json

@@ -361,6 +361,7 @@
 	"message_service_scored_X": "{'one': 'scored {}', 'other': 'scored {}'}",
 
 	"message_action_reply": "Reply",
+	"message_action_edit": "Edit",
 	"message_action_delete": "Delete",
 	"message_action_forward": "Forward",
 	"message_action_select": "Select",
@@ -485,6 +486,7 @@
 	"im_delete": "Delete {count}",
 	"im_forward": "Forward {count}",
 	"im_reply": "Reply",
+	"im_edit": "Edit",
 	"im_start": "Start",
 	"im_channel_join": "+ Join",
 	"im_channel_mute": "Mute",
@@ -501,6 +503,8 @@
 	"im_attach_file_title": "Send file",
 	"im_emoji_btn_title": "Insert emoticon",
 	"im_submit_message": "Send",
+	"im_submit_edit_message": "Save",
+	"im_edit_message_title": "Edit message",
 
 	"login_sign_in": "Sign in",
 	"login_enter_number_description": "Please choose your country and enter your full phone number.",
@@ -556,6 +560,7 @@
 
 	"message_forwarded_message": "Forwarded message",
 	"message_via_bot": "via {bot}",
+	"message_edited": "edited",
 	"message_forwarded_message_mobile": "Forwarded from {from}",
 	"message_forwarded_via_message_mobile": "Forwarded from {from} via {bot}",
 

app/js/message_composer.js

@@ -708,6 +708,7 @@ function MessageComposer (textarea, options) {
 
   this.onTyping = options.onTyping
   this.onMessageSubmit = options.onMessageSubmit
+  this.onDirectionKey = options.onDirectionKey
   this.getSendOnEnter = options.getSendOnEnter
   this.onFilePaste = options.onFilePaste
   this.onCommandSend = options.onCommandSend
@@ -941,6 +942,13 @@ MessageComposer.prototype.onKeyEvent = function (e) {
         return cancelEvent(e)
       }
     }
+
+    // Control keys when content is empty
+    if ([33, 34, 35, 36, 38, 39].indexOf(e.keyCode) != -1 &&
+        this.richTextareaEl &&
+        !this.richTextareaEl[0].textContent.length) {
+      return this.onDirectionKey(e)
+    }
   }
 }
 

app/js/messages_manager.js

@@ -877,6 +877,64 @@ angular.module('myApp.services')
       return messagesStorage[messageID] || {deleted: true}
     }
 
+    function canMessageBeEdited(message) {
+      var goodMedias = ['messageMediaPhoto', 'messageMediaDocument', 'messageMediaWebPage', 'messageMediaPending']
+      if (message._ != 'message' ||
+          message.deleted ||
+          message.fwd_from ||
+          message.via_bot_id ||
+          message.media && goodMedias.indexOf(message.media._) == -1 ||
+          message.fromID && AppUsersManager.isBot(message.fromID)) {
+        return false
+      }
+
+      return true
+    }
+
+    function canEditMessage(messageID) {
+      if (messageID <= 0 ||
+          !messagesStorage[messageID]) {
+        return false
+      }
+      var message = messagesStorage[messageID]
+      if (!message ||
+          !message.canBeEdited ||
+          !message.pFlags.out ||
+          message.date < tsNow(true) - 2 * 86400) {
+        return false
+      }
+
+      return true
+    }
+
+    function getMessageEditData(messageID) {
+      if (!canEditMessage(messageID)) {
+        return $q.reject()
+      }
+      var message = getMessage(messageID)
+      if (message.media &&
+          message.media._ != 'messageMediaEmpty' &&
+          message.media._ != 'messageMediaWebPage') {
+
+        return $q.when({
+          caption: true,
+          text: typeof message.media.caption === 'string' ? message.media.caption : ''
+        })
+      }
+
+      var text = typeof message.message === 'string' ? message.message : ''
+      var entities = RichTextProcessor.parseEntities(text)
+      var serverEntities = message.entities || []
+      entities = RichTextProcessor.mergeEntities(entities, serverEntities)
+
+      text = RichTextProcessor.wrapDraftText(text, {entities: entities})
+
+      return $q.when({
+        caption: false,
+        text: text
+      })
+    }
+
     function deleteMessages (messageIDs) {
       var splitted = AppMessagesIDsManager.splitMessageIDsByChannels(messageIDs)
       var promises = []
@@ -1126,7 +1184,7 @@ angular.module('myApp.services')
         var peerID = getMessagePeer(apiMessage)
         var isChannel = apiMessage.to_id._ == 'peerChannel'
         var channelID = isChannel ? -peerID : 0
-        var isBroadcast = isChannel && !AppChatsManager.isMegagroup(channelID)
+        var isBroadcast = isChannel && AppChatsManager.isBroadcast(channelID)
 
         var mid = AppMessagesIDsManager.getFullMessageID(apiMessage.id, channelID)
         apiMessage.mid = mid
@@ -1266,6 +1324,8 @@ angular.module('myApp.services')
           apiMessage.totalEntities = RichTextProcessor.mergeEntities(myEntities, apiEntities, !apiMessage.pending)
         }
 
+        apiMessage.canBeEdited = canMessageBeEdited(apiMessage)
+
         if (!options.isEdited) {
           messagesStorage[mid] = apiMessage
         }
@@ -1285,18 +1345,7 @@ angular.module('myApp.services')
         return
       }
 
-      var sendEntites = entities
+      var sendEntites = getInputEntities(entities)
-      if (entities.length) {
-        sendEntites = angular.copy(entities)
-        angular.forEach(sendEntites, function (entity) {
-          if (entity._ == 'messageEntityMentionName') {
-            entity._ = 'inputMessageEntityMentionName'
-            entity.user_id = AppUsersManager.getUserInput(entity.user_id)
-          }
-        })
-      }
-
-
       var messageID = tempID--
       var randomID = [nextRandomInt(0xFFFFFFFF), nextRandomInt(0xFFFFFFFF)]
       var randomIDS = bigint(randomID[0]).shiftLeft(32).add(bigint(randomID[1])).toString()
@@ -2038,6 +2087,51 @@ angular.module('myApp.services')
       return false
     }
 
+    function getInputEntities(entities) {
+      var sendEntites = angular.copy(entities)
+      angular.forEach(sendEntites, function (entity) {
+        if (entity._ == 'messageEntityMentionName') {
+          entity._ = 'inputMessageEntityMentionName'
+          entity.user_id = AppUsersManager.getUserInput(entity.user_id)
+        }
+      })
+      return sendEntites
+    }
+
+    function editMessage(messageID, text) {
+      if (!angular.isString(text) ||
+          !canEditMessage(messageID)) {
+        return $q.reject()
+      }
+      var entities = []
+      text = RichTextProcessor.parseMarkdown(text, entities)
+
+      var message = getMessage(messageID)
+      var peerID = getMessagePeer(message)
+      var flags = 8 | (1 << 11)
+
+      return MtpApiManager.invokeApi('messages.editMessage', {
+        flags: flags,
+        peer: AppPeersManager.getInputPeerByID(peerID),
+        id: AppMessagesIDsManager.getMessageLocalID(messageID),
+        message: text,
+        entities: getInputEntities(entities)
+      }).then(function (updates) {
+        ApiUpdatesManager.processUpdateMessage(updates)
+      }, function (error) {
+        if (error &&
+            error.type == 'MESSAGE_NOT_MODIFIED') {
+          error.handled = true
+          return
+        }
+        if (error &&
+            error.type == 'MESSAGE_EMPTY') {
+          error.handled = true
+        }
+        return $q.reject(error)
+      })
+    }
+
     function getMessagePeer (message) {
       var toID = message.to_id && AppPeersManager.getPeerID(message.to_id) || 0
 
@@ -2250,9 +2344,11 @@ angular.module('myApp.services')
       var fromUser = message.from_id && AppUsersManager.getUser(message.from_id)
       var fromBot = fromUser && fromUser.pFlags.bot && fromUser.username || false
       var toPeerID = AppPeersManager.getPeerID(message.to_id)
-      var withBot = (fromBot ||
+      var withBot = (
-        toPeerID < 0 && !(AppChatsManager.isChannel(-toPeerID) && !AppChatsManager.isMegagroup(-toPeerID)) ||
+        fromBot ||
-        toPeerID > 0 && AppUsersManager.isBot(toPeerID))
+        AppPeersManager.isBot(toPeerID) ||
+        AppPeersManager.isAnyGroup(toPeerID)
+      )
 
       var options = {
         noCommands: !withBot,
@@ -3258,10 +3354,14 @@ angular.module('myApp.services')
       forwardMessages: forwardMessages,
       startBot: startBot,
       shareGame: shareGame,
+      editMessage: editMessage,
       convertMigratedPeer: convertMigratedPeer,
       getMessagePeer: getMessagePeer,
       getMessageThumb: getMessageThumb,
       getMessageShareLink: getMessageShareLink,
+      canMessageBeEdited: canMessageBeEdited,
+      canEditMessage: canEditMessage,
+      getMessageEditData: getMessageEditData,
       clearDialogCache: clearDialogCache,
       wrapForDialog: wrapForDialog,
       wrapForHistory: wrapForHistory,

app/js/services.js

@@ -709,6 +709,10 @@ angular.module('myApp.services', ['myApp.i18n', 'izhukov.utils'])
       return false
     }
 
+    function isBroadcast (id) {
+      return isChannel(id) && !isMegagroup(id)
+    }
+
     function getChatInput (id) {
       return id || 0
     }
@@ -827,6 +831,7 @@ angular.module('myApp.services', ['myApp.i18n', 'izhukov.utils'])
       getChat: getChat,
       isChannel: isChannel,
       isMegagroup: isMegagroup,
+      isBroadcast: isBroadcast,
       hasRights: hasRights,
       saveChannelAccess: saveChannelAccess,
       saveIsMegagroup: saveIsMegagroup,
@@ -987,6 +992,14 @@ angular.module('myApp.services', ['myApp.i18n', 'izhukov.utils'])
       return (peerID < 0) && AppChatsManager.isMegagroup(-peerID)
     }
 
+    function isAnyGroup (peerID) {
+      return (peerID < 0) && !AppChatsManager.isBroadcast(-peerID)
+    }
+
+    function isBroadcast (id) {
+      return isChannel(id) && !isMegagroup(id)
+    }
+
     function isBot (peerID) {
       return (peerID > 0) && AppUsersManager.isBot(peerID)
     }
@@ -1002,7 +1015,9 @@ angular.module('myApp.services', ['myApp.i18n', 'izhukov.utils'])
       getPeerPhoto: getPeerPhoto,
       resolveUsername: resolveUsername,
       isChannel: isChannel,
+      isAnyGroup: isAnyGroup,
       isMegagroup: isMegagroup,
+      isBroadcast: isBroadcast,
       isBot: isBot
     }
   })

app/less/app.less

@@ -2103,7 +2103,11 @@ img.im_message_document_thumb {
   padding: 0 0 20px 10px;
 }
 
-.im_message_date {
+.im_message_edited {
+  display: none;
+}
+
+.im_message_date_text {
   cursor: pointer;
   &:hover {
     text-decoration: underline;
@@ -3908,7 +3912,8 @@ ul.chat_modal_migrate_list {
   .audio_player_size,
   .im_message_fwd_date,
   .im_message_views_cnt,
-  .im_message_sign_link {
+  .im_message_sign_link,
+  .im_message_edited {
     color: #899daf;
   }
 

app/less/desktop.less

@@ -881,6 +881,14 @@ a.footer_link.active:active {
   }
 }
 
+.im_submit_edit_label,
+.im_submit_edit .im_submit_send_label {
+  display: none;
+}
+.im_submit_edit .im_submit_edit_label {
+  display: inline;
+}
+
 .composer_emoji_panel {
   display: block;
   height: 30px;

app/less/mobile.less

@@ -856,6 +856,10 @@ img.im_message_video_thumb,
   font-size: 10px;
   padding: 0;
 }
+.im_message_edited {
+  position: absolute;
+  top: -11px;
+}
 
 .im_message_out {
   .im_message_fwd_date {

app/partials/desktop/im.html

@@ -168,6 +168,7 @@
                 <a class="btn btn-primary im_edit_forward_btn" ng-click="selectedForward()" ng-class="{disabled: !selectedCount}" ng-disabled="!selectedCount" my-i18n-format="im_forward"></a>
                 <a class="btn btn-primary im_edit_delete_btn" ng-click="selectedDelete()" ng-class="{disabled: !selectedCount}" ng-disabled="!selectedCount" my-i18n-format="im_delete" ng-show="historyState.canDelete"></a>
                 <a class="btn btn-primary im_edit_reply_btn" ng-click="selectedReply()" ng-show="selectedCount == 1 &amp;&amp; historyState.canReply" my-i18n="im_reply"></a>
+                <a class="btn btn-primary im_edit_reply_btn" ng-click="selectedEdit()" ng-show="selectedCount == 1 &amp;&amp; historyState.canEdit" my-i18n="im_edit"></a>
                 <my-i18n-param name="count"><strong class="im_selected_count" ng-show="selectedCount > 0" ng-bind="selectedCount"></strong></my-i18n-param>
               </div>
             </div>
@@ -189,7 +190,7 @@
 
                     <div class="im_send_reply_wrap" ng-if="draftMessage.replyToMsgID > 0">
                       <a class="im_send_reply_cancel" ng-mousedown="draftMessage.replyClear(true)"><i class="icon icon-reply-bar"></i><i class="icon icon-reply-bar"></i></a>
-                      <a class="im_message_reply_wrap" my-reply-message="draftMessage.replyToMsgID" watch="true"></a>
+                      <a class="im_message_reply_wrap" my-reply-message="draftMessage.replyToMsgID" watch="true" edit="{{draftMessage.type == 'edit'}}"></a>
                     </div>
 
                     <div class="im_send_reply_wrap im_send_fwds_wrap" ng-if="draftMessage.fwdMessages.length > 0">
@@ -210,7 +211,10 @@
                     </div>
 
                     <div class="im_send_buttons_wrap clearfix">
-                      <button type="submit" class="btn btn-md im_submit nocopy" my-i18n="im_submit_message"></button>
+                      <button type="submit" class="btn btn-md im_submit nocopy" ng-class="draftMessage.type == 'edit' ? 'im_submit_edit' : 'im_submit_send'">
+                        <span class="im_submit_send_label" my-i18n="im_submit_message"></span>
+                        <span class="im_submit_edit_label" my-i18n="im_submit_edit_message"></span>
+                      </button>
 
                       <div class="im_attach pull-left">
                         <input type="file" class="im_attach_input" size="28" multiple="multiple" title="{{'im_attach_file_title' | i18n}}" />

app/partials/desktop/message.html

@@ -38,7 +38,10 @@
             <i class="icon-message-views"></i><span class="im_message_views_cnt" my-message-views="historyMessage.mid"></span>
           </div>
         </div>
-        <span class="im_message_date clickable nocopy" data-content="{{::historyMessage.date | time}}"></span>
+        <span class="im_message_date clickable">
+          <span class="im_message_edited" my-message-edited="historyMessage.mid"></span>
+          <span class="im_message_date_text nocopy" data-content="{{::historyMessage.date | time}}"></span>
+        </span>
       </div>
 
       <div class="im_message_body" ng-class="::{im_message_body_media: historyMessage._ == 'message' &amp;&amp; historyMessage.media ? true : false}">

app/partials/desktop/reply_message.html

@@ -11,9 +11,10 @@
       watch="true"
     />
   </div>
-  <div class="im_message_reply_author" ng-switch-default>
+  <div class="im_message_reply_author" ng-switch-default ng-switch="isEdit">
     <span class="copyonly">&gt;&nbsp;</span>
-    <span my-peer-link="replyMessage.fromID" peer-watch="true"></span>
+    <span ng-switch-when="true" my-i18n="im_edit_message_title"></span>
+    <span ng-switch-default my-peer-link="replyMessage.fromID" peer-watch="true"></span>
   </div>
   <div class="im_message_reply_body" ng-switch-default>
     <span class="copyonly">&gt;&nbsp;</span>

app/partials/mobile/im.html

@@ -136,11 +136,11 @@
               <div class="im_send_form_wrap1">
 
                 <div class="im_send_form_wrap clearfix" ng-controller="AppImSendController">
-                  <form my-send-form draft-message="draftMessage" mentions="mentions" commands="commands" class="im_send_form" ng-class="{im_send_form_empty: !draftMessage.text.length, composer_progress_enabled: draftMessage.inlineProgress}">
+                  <form my-send-form draft-message="draftMessage" mentions="mentions" commands="commands" class="im_send_form" ng-class="{im_send_form_empty: !draftMessage.text.length && draftMessage.type != 'edit', composer_progress_enabled: draftMessage.inlineProgress}">
 
                     <div class="im_send_reply_wrap" ng-if="draftMessage.replyToMsgID > 0">
                       <a class="im_send_reply_cancel" ng-mousedown="draftMessage.replyClear()"><i class="icon icon-reply-bar"></i><i class="icon icon-reply-bar"></i></a>
-                      <a class="im_message_reply_wrap" my-reply-message="draftMessage.replyToMsgID" watch="true"></a>
+                      <a class="im_message_reply_wrap" my-reply-message="draftMessage.replyToMsgID" watch="true" edit="{{draftMessage.type == 'edit'}}"></a>
                     </div>
 
                     <div class="im_send_reply_wrap im_send_fwds_wrap" ng-if="draftMessage.fwdMessages.length > 0">

app/partials/mobile/message.html

@@ -37,7 +37,10 @@
           <i class="icon-message-status" tooltip="{{'message_action_retry' | i18n}}"></i>
         </a>
         <i ng-if="::historyMessage.pFlags.unread &amp;&amp; historyMessage.pFlags.out || historyMessage.pending || false" class="icon-message-status" ng-show="!historyMessage.error"></i>
-        <span class="im_message_date" ng-bind="::historyMessage.date | time"></span>
+        <span class="im_message_date">
+          <span class="im_message_edited" my-message-edited="historyMessage.mid"></span>
+          <span class="im_message_date_text" ng-bind="::historyMessage.date | time"></span>
+        </span>
       </div>
 
       <div my-message-body="historyMessage">

app/partials/mobile/message_actions_modal.html

@@ -2,6 +2,7 @@
 
   <div class="message_actions_wrap">
     <button ng-if="historyState.canReply" class="btn btn-md btn-md-primary btn-block" my-i18n="message_action_reply" ng-click="$close('reply')"></button>
+    <button ng-if="historyState.canEdit" class="btn btn-md btn-md-primary btn-block" my-i18n="message_action_edit" ng-click="$close('edit')"></button>
     <button class="btn btn-md btn-md-primary btn-block" my-i18n="message_action_forward" ng-click="$close('forward')"></button>
     <button ng-if="historyState.canDelete" class="btn btn-md btn-md-primary btn-block" my-i18n="message_action_delete" ng-click="$close('delete')"></button>
     <button class="btn btn-md btn-md-primary btn-block" my-i18n="message_action_select" ng-click="$close('select')"></button>