Add intents for group voice calls

This adds two new intents: start_call_voice and join_existing_voice. I need the latter in order to implement Element Web's new incoming call toasts, in which you can turn off your video before joining a group call. The other one, start_call_voice, exists more for completeness than anything; we don't currently want to allow users to start voice calls in group chats in our messenger clients, but maybe Cinny would, for instance.

src/UrlParams.test.ts

@@ -271,7 +271,11 @@ describe("UrlParams", () => {
         computeUrlParams(
           "?intent=start_call&widgetId=1234&parentUrl=parent.org",
         ),
-      ).toMatchObject({ ...startNewCallDefaults("desktop"), skipLobby: false });
+      ).toMatchObject({
+        ...startNewCallDefaults("desktop"),
+        skipLobby: false,
+        callIntent: "video",
+      });
     });
 
     it("accepts start_call_dm mobile", () => {
@@ -308,6 +312,29 @@ describe("UrlParams", () => {
         ),
       ).toMatchObject(joinExistingCallDefaults("desktop"));
     });
+
+    it("accepts start_call_voice", () => {
+      expect(
+        computeUrlParams(
+          "?intent=start_call_voice&widgetId=1234&parentUrl=parent.org",
+        ),
+      ).toMatchObject({
+        ...startNewCallDefaults("desktop"),
+        skipLobby: false,
+        callIntent: "audio",
+      });
+    });
+
+    it("accepts join_existing_voice", () => {
+      expect(
+        computeUrlParams(
+          "?intent=join_existing_voice&widgetId=1234&parentUrl=parent.org",
+        ),
+      ).toMatchObject({
+        ...joinExistingCallDefaults("desktop"),
+        callIntent: "audio",
+      });
+    });
   });
 
   describe("skipLobby", () => {

src/UrlParams.ts

@@ -29,6 +29,8 @@ interface RoomIdentifier {
 export enum UserIntent {
   StartNewCall = "start_call",
   JoinExistingCall = "join_existing",
+  StartNewCallVoice = "start_call_voice",
+  JoinExistingCallVoice = "join_existing_voice",
   StartNewCallDM = "start_call_dm",
   StartNewCallDMVoice = "start_call_dm_voice",
   JoinExistingCallDM = "join_existing_dm",
@@ -414,6 +416,15 @@ export const computeUrlParams = (search = "", hash = ""): UrlParams => {
       intentPreset.skipLobby = false;
       intentPreset.callIntent = "video";
       break;
+    case UserIntent.StartNewCallVoice:
+      intentPreset.skipLobby = false;
+      intentPreset.callIntent = "audio";
+      break;
+    case UserIntent.JoinExistingCallVoice:
+      // On desktop this will be overridden based on which button was used to join the call
+      intentPreset.skipLobby = false;
+      intentPreset.callIntent = "audio";
+      break;
     case UserIntent.StartNewCallDMVoice:
       intentPreset.callIntent = "audio";
     // Fall through