feat: dynamic frontend configuration

scripts/config-schema.json

@@ -30,13 +30,39 @@
     "frontend": {
       "type": "object",
       "additionalProperties": false,
-      "required": ["setReadOnlyOnWhiteboardLoad", "showSmallestScreenIndicator"],
+      "required": ["readOnlyOnWhiteboardLoad", "showSmallestScreenIndicator", "performance"],
       "properties": {
-        "setReadOnlyOnWhiteboardLoad": {
+        "readOnlyOnWhiteboardLoad": {
           "type": "boolean"
         },
         "showSmallestScreenIndicator": {
           "type": "boolean"
+        },
+        "performance": {
+          "type": "object",
+          "additionalProperties": false,
+          "required": ["pointerEventsThreshold", "refreshInfoFreq"],
+          "properties": {
+            "pointerEventsThreshold": {
+              "type": "object",
+              "additionalProperties": false,
+              "required": ["minDistDelta", "minTimeDelta"],
+              "properties": {
+                "minDistDelta": {
+                  "type": "number",
+                  "minimum": 0
+                },
+                "minTimeDelta": {
+                  "type": "number",
+                  "minimum": 0
+                }
+              }
+            },
+            "refreshInfoFreq": {
+              "type": "number",
+              "minimum": 0
+            }
+          }
         }
       }
     }

scripts/server-backend.js

@@ -195,19 +195,19 @@ function startBackendServer(port) {
         var whiteboardId = null;
         socket.on("disconnect", function () {
             if (infoByWhiteboard.has(whiteboardId)) {
-            const whiteboardServerSideInfo = infoByWhiteboard.get(whiteboardId);
+                const whiteboardServerSideInfo = infoByWhiteboard.get(whiteboardId);
 
-            if (socket && socket.id) {
-                whiteboardServerSideInfo.deleteScreenResolutionOfClient(socket.id);
-            }
+                if (socket && socket.id) {
+                    whiteboardServerSideInfo.deleteScreenResolutionOfClient(socket.id);
+                }
 
-            whiteboardServerSideInfo.decrementNbConnectedUsers();
+                whiteboardServerSideInfo.decrementNbConnectedUsers();
 
-            if (whiteboardServerSideInfo.hasConnectedUser()) {
-                socket.compress(false).broadcast.emit("refreshUserBadges", null); //Removes old user Badges
-            } else {
-                infoByWhiteboard.delete(whiteboardId);
-            }
+                if (whiteboardServerSideInfo.hasConnectedUser()) {
+                    socket.compress(false).broadcast.emit("refreshUserBadges", null); //Removes old user Badges
+                } else {
+                    infoByWhiteboard.delete(whiteboardId);
+                }
             }
         });
 
@@ -224,6 +224,8 @@ function startBackendServer(port) {
         socket.on("joinWhiteboard", function (content) {
             content = escapeAllContentStrings(content);
             if (accessToken === "" || accessToken == content["at"]) {
+                socket.emit("whiteboardConfig", { common: config.frontend });
+
                 whiteboardId = content["wid"];
                 socket.join(whiteboardId); //Joins room name=wid
                 if (!infoByWhiteboard.has(whiteboardId)) {

scripts/utils.test.js

@@ -31,11 +31,11 @@ test("Complex object config override", () => {
 
 test("Override default config", () => {
     const defaultConfig = getDefaultConfig();
-    const overrideConfig1 = { frontend: { setReadOnlyOnWhiteboardLoad: true } };
+    const overrideConfig1 = { frontend: { readOnlyOnWhiteboardLoad: true } };
 
-    expect(
-        deepMergeConfigs(defaultConfig, overrideConfig1).frontend.setReadOnlyOnWhiteboardLoad
-    ).toBe(true);
+    expect(deepMergeConfigs(defaultConfig, overrideConfig1).frontend.readOnlyOnWhiteboardLoad).toBe(
+        true
+    );
 });
 
 test("Dumb config is not valid", () => {