Add player control-plane and dashboard updates

src/web/bootstrap.js

@@ -22,8 +22,8 @@ function createWebBootstrap(options) {
 
   const dashboardWs = new WebSocketServer({ noServer: true });
   const dashboardClients = new Set();
-  const playerSnapshotCache = new Map();
-  const playerSnapshotSockets = new Map();
+  const playerSnapshotCache = options && options.playerSnapshotCache ? options.playerSnapshotCache : new Map();
+  const playerSnapshotSockets = options && options.playerSnapshotSockets ? options.playerSnapshotSockets : new Map();
   let dashboardRefreshInFlight = null;
   let broadcastDashboardState = null;
   function getPlayerSnapshotSocketUrl(slug) {
@@ -44,6 +44,10 @@ function createWebBootstrap(options) {
   }
 
   function ensurePlayerSnapshotSubscription(slug) {
+    if (options && typeof options.ensurePlayerSnapshotSubscription === 'function' && options.ensurePlayerSnapshotSubscription !== ensurePlayerSnapshotSubscription) {
+      return options.ensurePlayerSnapshotSubscription(slug);
+    }
+
     const key = String(slug || '').trim();
     if (!key || playerSnapshotSockets.has(key)) {
       return;
@@ -130,12 +134,44 @@ function createWebBootstrap(options) {
   const collectUploadPathsFromDirectory = uploadSyncService.collectUploadPathsFromDirectory;
   const syncPlaylistUploadsOnChange = uploadSyncService.syncPlaylistUploadsOnChange;
   const runMediaSyncTask = uploadSyncService.runMediaSyncTask;
+  let lastDashboardState = null;
+
+  function getFallbackDashboardState() {
+    return lastDashboardState || {
+      playlists: [],
+      screens: [],
+      clients: [],
+      kioskPlayers: [],
+      slides: [],
+      playerServiceConnected: false,
+      connectedPlayersCount: 0,
+      connectedClientsCount: 0
+    };
+  }
+
+  async function resolveDashboardState() {
+    try {
+      const state = await buildDashboardState();
+      lastDashboardState = state;
+      return state;
+    } catch (error) {
+      if (lastDashboardState) {
+        console.error(error);
+        return lastDashboardState;
+      }
+
+      throw error;
+    }
+  }
 
   async function sendDashboardStateToSocket(socket) {
     if (!socket || socket.readyState !== WebSocket.OPEN) {
       return;
     }
-    const state = await buildDashboardState();
+    const state = await resolveDashboardState().catch(function (error) {
+      console.error(error);
+      return getFallbackDashboardState();
+    });
     socket.send(JSON.stringify({ type: 'dashboard-state', state: state }));
   }
 
@@ -145,7 +181,10 @@ function createWebBootstrap(options) {
     }
 
     dashboardRefreshInFlight = (async function () {
-      const state = await buildDashboardState();
+      const state = await resolveDashboardState().catch(function (error) {
+        console.error(error);
+        return getFallbackDashboardState();
+      });
       const payload = JSON.stringify({ type: 'dashboard-state', state: state });
       for (const socket of dashboardClients) {
         if (socket && socket.readyState === WebSocket.OPEN) {