Plt-4483 Removed unnecessary events from ChannelStore (#4407)

* PLT-4483 Removed MoreChange listener from ChannelStore

* PLT-4483 Removed LeaveChannel listener from ChannelStore

webapp/stores/channel_store.jsx

@@ -5,13 +5,10 @@ import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
 import EventEmitter from 'events';
 
 var Utils;
-import Constants from 'utils/constants.jsx';
-const ActionTypes = Constants.ActionTypes;
+import {ActionTypes, Constants} from 'utils/constants.jsx';
 const NotificationPrefs = Constants.NotificationPrefs;
 
 const CHANGE_EVENT = 'change';
-const LEAVE_EVENT = 'leave';
-const MORE_CHANGE_EVENT = 'change';
 const STATS_EVENT = 'stats';
 const LAST_VIEVED_EVENT = 'last_viewed';
 
@@ -50,18 +47,6 @@ class ChannelStoreClass extends EventEmitter {
         this.removeListener(CHANGE_EVENT, callback);
     }
 
-    emitMoreChange() {
-        this.emit(MORE_CHANGE_EVENT);
-    }
-
-    addMoreChangeListener(callback) {
-        this.on(MORE_CHANGE_EVENT, callback);
-    }
-
-    removeMoreChangeListener(callback) {
-        this.removeListener(MORE_CHANGE_EVENT, callback);
-    }
-
     emitStatsChange() {
         this.emit(STATS_EVENT);
     }
@@ -73,17 +58,6 @@ class ChannelStoreClass extends EventEmitter {
     removeStatsChangeListener(callback) {
         this.removeListener(STATS_EVENT, callback);
     }
-    emitLeave(id) {
-        this.emit(LEAVE_EVENT, id);
-    }
-
-    addLeaveListener(callback) {
-        this.on(LEAVE_EVENT, callback);
-    }
-
-    removeLeaveListener(callback) {
-        this.removeListener(LEAVE_EVENT, callback);
-    }
 
     emitLastViewed(lastViewed, ownNewMessage) {
         this.emit(LAST_VIEVED_EVENT, lastViewed, ownNewMessage);
@@ -321,14 +295,6 @@ class ChannelStoreClass extends EventEmitter {
         return this.unreadCounts;
     }
 
-    leaveChannel(id) {
-        Reflect.deleteProperty(this.myChannelMembers, id);
-        const element = this.channels.indexOf(id);
-        if (element > -1) {
-            this.channels.splice(element, 1);
-        }
-    }
-
     getChannelNamesMap() {
         var channelNamesMap = {};
 
@@ -404,7 +370,7 @@ ChannelStore.dispatchToken = AppDispatcher.register((payload) => {
         break;
     case ActionTypes.RECEIVED_MORE_CHANNELS:
         ChannelStore.storeMoreChannels(action.channels);
-        ChannelStore.emitMoreChange();
+        ChannelStore.emitChange();
         break;
 
     case ActionTypes.RECEIVED_CHANNEL_STATS:
@@ -414,14 +380,9 @@ ChannelStore.dispatchToken = AppDispatcher.register((payload) => {
         ChannelStore.emitStatsChange();
         break;
 
-    case ActionTypes.LEAVE_CHANNEL:
-        ChannelStore.leaveChannel(action.id);
-        ChannelStore.emitLeave(action.id);
-        break;
-
     default:
         break;
     }
 });
 
-export default ChannelStore;
+export default ChannelStore;