Merging performance branch into master (#4268)

* improve performance on sendNotifications

* Fix SQL queries

* Remove get direct profiles, not needed anymore

* Add raw data to error details if AppError fails to decode

* men

* Fix decode (#4052)

* Fixing json decode

* Adding unit test

* Initial work for client scaling (#4051)

* Begin adding paging to profiles API

* Added more paging functionality

* Finish hooking up admin console user lists

* Add API for searching users and add searching to all user lists

* Add lazy loading of profiles

* Revert config.json

* Fix unit tests and some style issues

* Add GetProfilesFromList to Go driver and fix web unit test

* Update etag for GetProfiles

* Updating ui for filters and pagination (#4044)

* Updating UI for pagination

* Adjusting margins for filter row

* Adjusting margin for specific modals

* Adding relative padding to system console

* Adjusting responsive view

* Update client user tests

* Minor fixes for direct messages modal (#4056)

* Remove some unneeded initial load calls (#4057)

* UX updates to user lists, added smart counts and bug fixes (#4059)

* Improved getExplicitMentions and unit tests (#4064)

* Refactor getting posts to lazy load profiles correctly (#4062)

* Comment out SetActiveChannel test (#4066)

* Profiler cpu, block, and memory profiler. (#4081)

* Fix TestSetActiveChannel unit test (#4071)

* Fixing build failure caused by dependancies updating (#4076)

* Adding profiler

* Fix admin_team_member_dropdown eslint errors

* Bumping session cache size (#4077)

* Bumping session cache size

* Bumping status cache

* Refactor how the client handles channel members to be large team friendly (#4106)

* Refactor how the client handles channel members to be large team friendly

* Change Id to ChannelId in ChannelStats model

* Updated getChannelMember and getProfilesByIds routes to match proposal

* Performance improvements (#4100)

* Performance improvements

* Fixing re-connect issue

* Fixing error message

* Some other minor perf tweaks

* Some other minor perf tweaks

* Fixing config file

* Fixing buffer size

* Fixing web socket send message

* adding some error logging

* fix getMe to be user required

* Fix websocket event for new user

* Fixing shutting down

* Reverting web socket changes

* Fixing logging lvl

* Adding caching to GetMember

* Adding some logging

* Fixing caching

* Fixing caching invalidate

* Fixing direct message caching

* Fixing caching

* Fixing caching

* Remove GetDirectProfiles from initial load

* Adding logging and fixing websocket client

* Adding back caching from bad merge.

* Explicitly close go driver requests (#4162)

* Refactored how the client handles team members to be more large team friendly (#4159)

* Refactor getProfilesForDirectMessageList API into getAllProfiles API

* Refactored how the client handles team members to be more large team friendly

* Fix js error when receiving a notification

* Fix JS error caused by current user being overwritten with sanitized version (#4165)

* Adding error message to status failure (#4167)

* Fix a few bugs caused by client scaling refactoring (#4170)

* When there is no read replica, don't open a second set of connections to the master database (#4173)

* Adding connection tacking to stats (#4174)

* Reduce DB writes for statuses and other status related changes (#4175)

* Fix bug preventing opening of DM channels from more modal (#4181)

* 	Fixing socket timing error (#4183)

* Fixing ping/pong handler

* Fixing socket timing error

* Commenting out status broadcasting

* Removing user status changes

* Removing user status changes

* Removing user status changes

* Removing user status changes

* Adding DoPreComputeJson()

* Performance improvements (#4194)

* * Fix System Console Analytics queries
* Add db.SetConnMaxLifetime to 15 minutes
* Add "net/http/pprof" for profiling
* Add FreeOSMemory() to manually release memory on reload config

* Add flag to enable http profiler

* Fix memory leak (#4197)

* Fix memory leak

* removed unneeded nil assignment

* Fixing go routine leak (#4208)

* Merge fixes

* Merge fix

* Refactored statuses to be queried by the client rather than broadcast by the server (#4212)

* Refactored server code to reduce status broadcasts and to allow getting statuses by IDs

* Refactor client code to periodically fetch statuses

* Add store unit test for getting statuses by ids

* Fix status unit test

* Add getStatusesByIds REST API and move the client over to use that instead of the WebSocket

* Adding multiple threads to websocket hub (#4230)

* Adding multiple threads to websocket hub

* Fixing unit tests

* Fixing so websocket connections from the same user end up in the same… (#4240)

* Fixing so websocket connections from the same user end up in the same list

* Removing old comment

* Refactor user autocomplete to query the server (#4239)

* Add API for autocompleting users

* Converted at mention autocomplete to query server

* Converted user search autocomplete to query server

* Switch autocomplete API naming to use term instead of username

* Split autocomplete API into two, one for channels and for teams

* Fix copy/paste error

* Some final client scaling fixes (#4246)

* Add lazy loading of profiles to integration pages

* Add lazy loading of profiles to emoji page

* Fix JS error when receiving post in select team menu and also clean up channel store

webapp/components/channel_header.jsx

@@ -63,13 +63,15 @@ export default class ChannelHeader extends React.Component {
     }
 
     getStateFromStores() {
-        const extraInfo = ChannelStore.getExtraInfo(this.props.channelId);
+        const stats = ChannelStore.getStats(this.props.channelId);
+
+        const users = UserStore.getProfileListInChannel(this.props.channelId);
 
         return {
             channel: ChannelStore.get(this.props.channelId),
-            memberChannel: ChannelStore.getMember(this.props.channelId),
-            users: extraInfo.members,
-            userCount: extraInfo.member_count,
+            memberChannel: ChannelStore.getMyMember(this.props.channelId),
+            users,
+            userCount: stats.member_count,
             currentUser: UserStore.getCurrentUser(),
             enableFormatting: PreferenceStore.getBool(Preferences.CATEGORY_ADVANCED_SETTINGS, 'formatting', true),
             isBusy: WebrtcStore.isBusy()
@@ -89,10 +91,10 @@ export default class ChannelHeader extends React.Component {
 
     componentDidMount() {
         ChannelStore.addChangeListener(this.onListenerChange);
-        ChannelStore.addExtraInfoChangeListener(this.onListenerChange);
+        ChannelStore.addStatsChangeListener(this.onListenerChange);
         SearchStore.addSearchChangeListener(this.onListenerChange);
         PreferenceStore.addChangeListener(this.onListenerChange);
-        UserStore.addChangeListener(this.onListenerChange);
+        UserStore.addInChannelChangeListener(this.onListenerChange);
         UserStore.addStatusesChangeListener(this.onListenerChange);
         WebrtcStore.addChangedListener(this.onListenerChange);
         WebrtcStore.addBusyListener(this.onBusy);
@@ -102,10 +104,10 @@ export default class ChannelHeader extends React.Component {
 
     componentWillUnmount() {
         ChannelStore.removeChangeListener(this.onListenerChange);
-        ChannelStore.removeExtraInfoChangeListener(this.onListenerChange);
+        ChannelStore.removeStatsChangeListener(this.onListenerChange);
         SearchStore.removeSearchChangeListener(this.onListenerChange);
         PreferenceStore.removeChangeListener(this.onListenerChange);
-        UserStore.removeChangeListener(this.onListenerChange);
+        UserStore.removeInChannelChangeListener(this.onListenerChange);
         UserStore.removeStatusesChangeListener(this.onListenerChange);
         WebrtcStore.removeChangedListener(this.onListenerChange);
         WebrtcStore.removeBusyListener(this.onBusy);
@@ -117,10 +119,7 @@ export default class ChannelHeader extends React.Component {
     }
 
     onListenerChange() {
-        const newState = this.getStateFromStores();
-        if (!Utils.areObjectsEqual(newState, this.state)) {
-            this.setState(newState);
-        }
+        this.setState(this.getStateFromStores());
     }
 
     handleLeave() {
@@ -265,7 +264,6 @@ export default class ChannelHeader extends React.Component {
             </Popover>
         );
         let channelTitle = channel.display_name;
-        const currentId = this.state.currentUser.id;
         const isAdmin = TeamStore.isTeamAdminForCurrentTeam() || UserStore.isSystemAdminForCurrentUser();
         const isSystemAdmin = UserStore.isSystemAdminForCurrentUser();
         const isDirect = (this.state.channel.type === 'D');
@@ -273,13 +271,8 @@ export default class ChannelHeader extends React.Component {
 
         if (isDirect) {
             const userMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
-            let contact;
-            if (this.state.users.length > 1) {
-                if (this.state.users[0].id === currentId) {
-                    contact = this.state.users[1];
-                } else {
-                    contact = this.state.users[0];
-                }
+            const contact = this.state.users[0];
+            if (contact) {
                 channelTitle = Utils.displayUsername(contact.id);
             }