feat: assign random user name when not set (#6663)

package.json

@@ -19,6 +19,7 @@
     ]
   },
   "dependencies": {
+    "@excalidraw/random-username": "1.0.0",
     "@radix-ui/react-popover": "1.0.3",
     "@radix-ui/react-tabs": "1.0.2",
     "@sentry/browser": "6.2.5",

src/excalidraw-app/collab/Collab.tsx

@@ -380,6 +380,13 @@ class Collab extends PureComponent<Props, CollabState> {
   startCollaboration = async (
     existingRoomLinkData: null | { roomId: string; roomKey: string },
   ): Promise<ImportedDataState | null> => {
+    if (!this.state.username) {
+      import("@excalidraw/random-username").then(({ getRandomUsername }) => {
+        const username = getRandomUsername();
+        this.onUsernameChange(username);
+      });
+    }
+
     if (this.portal.socket) {
       return null;
     }

yarn.lock

@@ -1254,6 +1254,11 @@
   resolved "https://registry.yarnpkg.com/@excalidraw/prettier-config/-/prettier-config-1.0.2.tgz#b7c061c99cee2f78b9ca470ea1fbd602683bba65"
   integrity sha512-rFIq8+A8WvkEzBsF++Rw6gzxE+hU3ZNkdg8foI+Upz2y/rOC/gUpWJaggPbCkoH3nlREVU59axQjZ1+F6ePRGg==
 
+"@excalidraw/random-username@1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@excalidraw/random-username/-/random-username-1.0.0.tgz#6d5293148aee6cd08dcdfcadc0c91276572f4499"
+  integrity sha512-pd4VapWahQ7PIyThGq32+C+JUS73mf3RSdC7BmQiXzhQsCTU4RHc8y9jBi+pb1CFV0iJXvjJRXnVdLCbTj3+HA==
+
 "@firebase/analytics-types@0.4.0":
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/@firebase/analytics-types/-/analytics-types-0.4.0.tgz#d6716f9fa36a6e340bc0ecfe68af325aa6f60508"