Shows the version change banner only on plugin update and tries to reconnect when the interface is refreshed (#1807)

mattermost-plugin/webapp/src/index.tsx

@@ -67,7 +67,7 @@ type Props = {
 }
 
 const MainApp = (props: Props) => {
-    wsClient.initPlugin(manifest.id, props.webSocketClient)
+    wsClient.initPlugin(manifest.id, manifest.version, props.webSocketClient)
 
     useEffect(() => {
         document.body.classList.add('focalboard-body')

webapp/src/utils.test.ts

@@ -132,4 +132,18 @@ describe('utils', () => {
             expect(Utils.displayDateTime(date, intl)).toBe(`July 09, ${previousYear}, 5:35 AM`)
         })
     })
+
+    describe('compare versions', () => {
+        it('should return one if b > a', () => {
+            expect(Utils.compareVersions('0.9.4', '0.10.0')).toBe(1)
+        })
+
+        it('should return zero if a = b', () => {
+            expect(Utils.compareVersions('1.2.3', '1.2.3')).toBe(0)
+        })
+
+        it('should return minus one if b < a', () => {
+            expect(Utils.compareVersions('10.9.4', '10.9.2')).toBe(-1)
+        })
+    })
 })

webapp/src/utils.ts

@@ -546,41 +546,39 @@ class Utils {
     }
 
     /**
-     * Boolean function to check if a version is greater than another.
+     * Function to check how a version compares to another
      *
-     * currentVersionParam: The version being checked
-     * compareVersionParam: The version to compare the former version against
-     *
-     * eg.  currentVersionParam = 4.16.0, compareVersionParam = 4.17.0 returns false
-     *      currentVersionParam = 4.16.1, compareVersionParam = 4.16.1 returns true
+     * eg.  versionA = 4.16.0, versionB = 4.17.0 returns  1
+     *      versionA = 4.16.1, versionB = 4.16.1 returns  0
+     *      versionA = 4.16.1, versionB = 4.15.0 returns -1
      */
-    static isVersionGreaterThanOrEqualTo(currentVersionParam: string, compareVersionParam: string): boolean {
-        if (currentVersionParam === compareVersionParam) {
-            return true
+    static compareVersions(versionA: string, versionB: string): number {
+        if (versionA === versionB) {
+            return 0
         }
 
         // We only care about the numbers
-        const currentVersionNumber = (currentVersionParam || '').split('.').filter((x) => (/^[0-9]+$/).exec(x) !== null)
-        const compareVersionNumber = (compareVersionParam || '').split('.').filter((x) => (/^[0-9]+$/).exec(x) !== null)
+        const versionANumber = (versionA || '').split('.').filter((x) => (/^[0-9]+$/).exec(x) !== null)
+        const versionBNumber = (versionB || '').split('.').filter((x) => (/^[0-9]+$/).exec(x) !== null)
 
-        for (let i = 0; i < Math.max(currentVersionNumber.length, compareVersionNumber.length); i++) {
-            const currentVersion = parseInt(currentVersionNumber[i], 10) || 0
-            const compareVersion = parseInt(compareVersionNumber[i], 10) || 0
-            if (currentVersion > compareVersion) {
-                return true
+        for (let i = 0; i < Math.max(versionANumber.length, versionBNumber.length); i++) {
+            const a = parseInt(versionANumber[i], 10) || 0
+            const b = parseInt(versionBNumber[i], 10) || 0
+            if (a > b) {
+                return -1
             }
 
-            if (currentVersion < compareVersion) {
-                return false
+            if (a < b) {
+                return 1
             }
         }
 
         // If all components are equal, then return true
-        return true
+        return 0
     }
 
     static isDesktop(): boolean {
-        return Utils.isDesktopApp() && Utils.isVersionGreaterThanOrEqualTo(Utils.getDesktopVersion(), '5.0.0')
+        return Utils.isDesktopApp() && (Utils.compareVersions(Utils.getDesktopVersion(), '5.0.0') <= 0)
     }
 
     static getReadToken(): string {

webapp/src/wsclient.ts

@@ -49,7 +49,9 @@ type OnConfigChangeHandler = (client: WSClient, clientConfig: ClientConfig) => v
 class WSClient {
     ws: WebSocket|null = null
     client: MMWebSocketClient|null = null
+    onPluginReconnect: null|(() => void) = null
     pluginId = ''
+    pluginVersion = ''
     onAppVersionChangeHandler: ((versionHasChanged: boolean) => void) | null = null
     clientPrefix = ''
     serverUrl: string | undefined
@@ -89,8 +91,9 @@ class WSClient {
         this.serverUrl = serverUrl
     }
 
-    initPlugin(pluginId: string, client: MMWebSocketClient): void {
+    initPlugin(pluginId: string, pluginVersion: string, client: MMWebSocketClient): void {
         this.pluginId = pluginId
+        this.pluginVersion = pluginVersion
         this.clientPrefix = `custom_${pluginId}_`
         this.client = client
         Utils.log(`WSClient initialised for plugin id "${pluginId}"`)
@@ -181,6 +184,7 @@ class WSClient {
                     handler(this)
                 }
             }
+            this.onPluginReconnect = onReconnect
 
             const onClose = (connectFailCount: number) => {
                 Utils.logError(`WSClient has been closed, connect fail count: ${connectFailCount}`)
@@ -311,10 +315,30 @@ class WSClient {
             return
         }
 
-        if (data.plugin_statuses.some((s: any) => s.plugin_id === this.pluginId)) {
+        const focalboardStatusChange = data.plugin_statuses.find((s: any) => s.plugin_id === this.pluginId)
+        if (focalboardStatusChange) {
+            // if the plugin version is greater than the current one,
+            // show the new version banner
+            if (Utils.compareVersions(this.pluginVersion, focalboardStatusChange.version) > 0) {
                 Utils.log('Boards plugin has been updated')
                 this.onAppVersionChangeHandler(true)
             }
+
+            // if the plugin version is greater or equal, trigger a
+            // reconnect to resubscribe in case the interface hasn't
+            // been reloaded
+            if (Utils.compareVersions(this.pluginVersion, focalboardStatusChange.version) >= 0) {
+                // this is a temporal solution that leaves a second
+                // between the message and the reconnect so the server
+                // has time to register the WS handler
+                setTimeout(() => {
+                    if (this.onPluginReconnect) {
+                        Utils.log('Reconnecting after plugin update')
+                        this.onPluginReconnect()
+                    }
+                }, 1000)
+            }
+        }
     }
 
     authenticate(workspaceId: string, token: string): void {