MM-50122 : Remove and test refetching of channels on browser focus change (#22973)

e2e-tests/playwright/support/server/default_config.ts

@@ -532,6 +532,7 @@ const defaultServerConfig: AdminConfig = {
         EnableRemoteClusterService: false,
         EnableAppBar: false,
         PatchPluginsReactDOM: false,
+        DisableRefetchingOnBrowserFocus: false,
     },
     AnalyticsSettings: {
         MaxUsersForStatistics: 2500,

server/config/client.go

@@ -94,6 +94,8 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 
 	props["CWSURL"] = *c.CloudSettings.CWSURL
 
+	props["DisableRefetchingOnBrowserFocus"] = strconv.FormatBool(*c.ExperimentalSettings.DisableRefetchingOnBrowserFocus)
+
 	// Set default values for all options that require a license.
 	props["ExperimentalEnableAuthenticationTransfer"] = "true"
 	props["LdapNicknameAttributeSet"] = "false"

server/model/config.go

@@ -979,6 +979,7 @@ type ExperimentalSettings struct {
 	EnableRemoteClusterService      *bool   `access:"experimental_features"`
 	EnableAppBar                    *bool   `access:"experimental_features"`
 	PatchPluginsReactDOM            *bool   `access:"experimental_features"`
+	DisableRefetchingOnBrowserFocus *bool   `access:"experimental_features"`
 }
 
 func (s *ExperimentalSettings) SetDefaults() {
@@ -1017,6 +1018,10 @@ func (s *ExperimentalSettings) SetDefaults() {
 	if s.PatchPluginsReactDOM == nil {
 		s.PatchPluginsReactDOM = NewBool(false)
 	}
+
+	if s.DisableRefetchingOnBrowserFocus == nil {
+		s.DisableRefetchingOnBrowserFocus = NewBool(false)
+	}
 }
 
 type AnalyticsSettings struct {

server/platform/services/telemetry/telemetry.go

@@ -750,15 +750,16 @@ func (ts *TelemetryService) trackConfig() {
 	})
 
 	ts.SendTelemetry(TrackConfigExperimental, map[string]any{
-		"client_side_cert_enable":            *cfg.ExperimentalSettings.ClientSideCertEnable,
-		"isdefault_client_side_cert_check":   isDefault(*cfg.ExperimentalSettings.ClientSideCertCheck, model.ClientSideCertCheckPrimaryAuth),
-		"link_metadata_timeout_milliseconds": *cfg.ExperimentalSettings.LinkMetadataTimeoutMilliseconds,
-		"restrict_system_admin":              *cfg.ExperimentalSettings.RestrictSystemAdmin,
-		"use_new_saml_library":               *cfg.ExperimentalSettings.UseNewSAMLLibrary,
-		"enable_shared_channels":             *cfg.ExperimentalSettings.EnableSharedChannels,
-		"enable_remote_cluster_service":      *cfg.ExperimentalSettings.EnableRemoteClusterService && cfg.FeatureFlags.EnableRemoteClusterService,
-		"enable_app_bar":                     *cfg.ExperimentalSettings.EnableAppBar,
-		"patch_plugins_react_dom":            *cfg.ExperimentalSettings.PatchPluginsReactDOM,
+		"client_side_cert_enable":             *cfg.ExperimentalSettings.ClientSideCertEnable,
+		"isdefault_client_side_cert_check":    isDefault(*cfg.ExperimentalSettings.ClientSideCertCheck, model.ClientSideCertCheckPrimaryAuth),
+		"link_metadata_timeout_milliseconds":  *cfg.ExperimentalSettings.LinkMetadataTimeoutMilliseconds,
+		"restrict_system_admin":               *cfg.ExperimentalSettings.RestrictSystemAdmin,
+		"use_new_saml_library":                *cfg.ExperimentalSettings.UseNewSAMLLibrary,
+		"enable_shared_channels":              *cfg.ExperimentalSettings.EnableSharedChannels,
+		"enable_remote_cluster_service":       *cfg.ExperimentalSettings.EnableRemoteClusterService && cfg.FeatureFlags.EnableRemoteClusterService,
+		"enable_app_bar":                      *cfg.ExperimentalSettings.EnableAppBar,
+		"patch_plugins_react_dom":             *cfg.ExperimentalSettings.PatchPluginsReactDOM,
+		"disable_refetching_on_browser_focus": *cfg.ExperimentalSettings.DisableRefetchingOnBrowserFocus,
 	})
 
 	ts.SendTelemetry(TrackConfigAnalytics, map[string]any{

webapp/channels/src/components/admin_console/admin_definition.jsx

@@ -6887,6 +6887,15 @@ const AdminDefinition = {
                         isHidden: it.licensedForFeature('Cloud'),
                         isDisabled: it.not(it.userHasWritePermissionOnResource(RESOURCE_KEYS.EXPERIMENTAL.FEATURES)),
                     },
+                    {
+                        type: Constants.SettingsTypes.TYPE_BOOL,
+                        key: 'ExperimentalSettings.DisableRefetchingOnBrowserFocus',
+                        label: t('admin.experimental.disableRefetchingOnBrowserFocus.title'),
+                        label_default: 'Disable data refetching on browser refocus:',
+                        help_text: t('admin.experimental.disableRefetchingOnBrowserFocus.desc'),
+                        help_text_default: 'When true, Mattermost will not refetch channels and channel members when the browser regains focus. This may result in improved performance for users with many channels and channel members.',
+                        isDisabled: it.not(it.userHasWritePermissionOnResource(RESOURCE_KEYS.EXPERIMENTAL.FEATURES)),
+                    },
                 ],
             },
         },

webapp/channels/src/components/team_controller/index.ts

@@ -36,6 +36,7 @@ function mapStateToProps(state: GlobalState, ownProps: OwnProps) {
     const currentUser = getCurrentUser(state);
     const plugins = state.plugins.components.NeedsTeamComponent;
     const graphQLEnabled = isGraphQLEnabled(state);
+    const disableRefetchingOnBrowserFocus = config.DisableRefetchingOnBrowserFocus === 'true';
 
     return {
         currentUser,
@@ -46,6 +47,7 @@ function mapStateToProps(state: GlobalState, ownProps: OwnProps) {
         selectedThreadId: getSelectedThreadIdInCurrentTeam(state),
         mfaRequired: checkIfMFARequired(currentUser, license, config, ownProps.match.url),
         graphQLEnabled,
+        disableRefetchingOnBrowserFocus,
     };
 }
 

webapp/channels/src/components/team_controller/team_controller.tsx

@@ -70,7 +70,7 @@ function TeamController(props: Props) {
         const wakeUpIntervalId = setInterval(() => {
             const currentTime = Date.now();
             if ((currentTime - lastTime.current) > WAKEUP_THRESHOLD) {
-                console.log('computer woke up - fetching latest'); //eslint-disable-line no-console
+                console.log('computer woke up - reconnecting'); //eslint-disable-line no-console
                 reconnect();
             }
             lastTime.current = currentTime;
@@ -92,12 +92,15 @@ function TeamController(props: Props) {
                 props.markChannelAsReadOnFocus(props.currentChannelId);
             }
 
-            const currentTime = Date.now();
-            if ((currentTime - blurTime.current) > UNREAD_CHECK_TIME_MILLISECONDS && props.currentTeamId) {
-                if (props.graphQLEnabled) {
-                    props.fetchChannelsAndMembers(props.currentTeamId);
-                } else {
-                    props.fetchMyChannelsAndMembersREST(props.currentTeamId);
+            // Temporary flag to disable refetching of channel members on browser focus
+            if (!props.disableRefetchingOnBrowserFocus) {
+                const currentTime = Date.now();
+                if ((currentTime - blurTime.current) > UNREAD_CHECK_TIME_MILLISECONDS && props.currentTeamId) {
+                    if (props.graphQLEnabled) {
+                        props.fetchChannelsAndMembers(props.currentTeamId);
+                    } else {
+                        props.fetchMyChannelsAndMembersREST(props.currentTeamId);
+                    }
                 }
             }
         }

webapp/channels/src/i18n/en.json

@@ -895,6 +895,8 @@
   "admin.experimental.collapsedThreads.title": "Collapsed Reply Threads",
   "admin.experimental.defaultTheme.desc": "Set a default theme that applies to all new users on the system.",
   "admin.experimental.defaultTheme.title": "Default Theme:",
+  "admin.experimental.disableRefetchingOnBrowserFocus.desc": "When true, Mattermost will not refetch channels and channel members when the browser regains focus. This may result in improved performance for users with many channels and channel members.",
+  "admin.experimental.disableRefetchingOnBrowserFocus.title": "Disable data refetching on browser refocus:",
   "admin.experimental.emailBatchingBufferSize.desc": "Specify the maximum number of notifications batched into a single email.",
   "admin.experimental.emailBatchingBufferSize.example": "E.g.: \"256\"",
   "admin.experimental.emailBatchingBufferSize.title": "Email Batching Buffer Size:",

webapp/platform/types/src/config.ts

@@ -38,6 +38,7 @@ export type ClientConfig = {
     DefaultTheme: string;
     DiagnosticId: string;
     DiagnosticsEnabled: string;
+    DisableRefetchingOnBrowserFocus: string;
     EmailLoginButtonBorderColor: string;
     EmailLoginButtonColor: string;
     EmailLoginButtonTextColor: string;
@@ -729,6 +730,7 @@ export type ExperimentalSettings = {
     EnableRemoteClusterService: boolean;
     EnableAppBar: boolean;
     PatchPluginsReactDOM: boolean;
+    DisableRefetchingOnBrowserFocus: boolean;
 };
 
 export type AnalyticsSettings = {