Add ability to joining a voice room while it's in progress

src/app/components/VoiceRoomItem.svelte

@@ -6,7 +6,12 @@
   import ProfileCircle from "@app/components/ProfileCircle.svelte"
   import RoomName from "@app/components/RoomName.svelte"
   import {pushToast} from "@app/util/toast"
-  import {deriveVoiceParticipants, joinVoiceRoom, currentVoiceSession} from "@app/voice"
+  import {
+    deriveVoiceParticipants,
+    joinVoiceRoom,
+    leaveVoiceRoom,
+    currentVoiceSession,
+  } from "@app/voice"
 
   interface Props {
     url: string
@@ -18,17 +23,29 @@
   const participants = deriveVoiceParticipants(url, h)
   const isActive = $derived($currentVoiceSession?.url === url && $currentVoiceSession?.h === h)
   let isJoining = $state(false)
+  let joinAbortController: AbortController | undefined
 
   const handleClick = async () => {
-    if (isJoining) return
+    if (isActive) {
+      await leaveVoiceRoom()
+      return
+    }
+    if (isJoining) {
+      joinAbortController?.abort()
+      return
+    }
+    joinAbortController = new AbortController()
     isJoining = true
     try {
-      await joinVoiceRoom(url, h)
+      await joinVoiceRoom(url, h, joinAbortController.signal)
     } catch (e) {
+      if (e instanceof Error && e.message === "Join cancelled") return
+      if (e instanceof DOMException && e.name === "AbortError") return
       const message = e instanceof Error ? e.message : String(e)
       pushToast({theme: "error", message: `Failed to join voice room: ${message}`})
     } finally {
       isJoining = false
+      joinAbortController = undefined
     }
   }
 
@@ -40,10 +57,7 @@
 </script>
 
 <div>
-  <SecondaryNavItem
-    onclick={handleClick}
-    disabled={isJoining}
-    class={isActive ? "!bg-base-100 !text-base-content" : ""}>
+  <SecondaryNavItem onclick={handleClick} class={isActive ? "!bg-base-100 !text-base-content" : ""}>
     {#if isJoining}
       <span class="loading loading-spinner loading-sm"></span>
     {:else}

src/app/voice.ts

@@ -24,6 +24,7 @@ export const currentVoiceSession = writable<VoiceSession | undefined>(undefined)
 const fetchLivekitToken = async (
   url: string,
   groupId: string,
+  signal?: AbortSignal,
 ): Promise<{server_url: string; participant_token: string}> => {
   const httpUrl = url
     .replace(/^wss:\/\//, "https://")
@@ -34,6 +35,8 @@ const fetchLivekitToken = async (
   const $signer = signer.get()
   if (!$signer) throw new Error("No signer available")
 
+  if (signal?.aborted) throw new Error("Join cancelled")
+
   const authHeader = await getToken(
     endpoint,
     "GET",
@@ -47,9 +50,16 @@ const fetchLivekitToken = async (
     true,
   )
 
-  const response = await fetch(endpoint, {
-    headers: {Authorization: authHeader},
-  })
+  let response: Response
+  try {
+    response = await fetch(endpoint, {
+      headers: {Authorization: authHeader},
+      signal,
+    })
+  } catch (e) {
+    if (e instanceof DOMException && e.name === "AbortError") throw new Error("Join cancelled")
+    throw e
+  }
 
   if (!response.ok) {
     const text = await response.text()
@@ -104,7 +114,11 @@ const stopPresenceHeartbeat = () => {
   }
 }
 
-export const joinVoiceRoom = async (url: string, h: string) => {
+export const joinVoiceRoom = async (
+  url: string,
+  h: string,
+  signal?: AbortSignal,
+): Promise<void> => {
   const session = get(currentVoiceSession)
 
   if (session) {
@@ -112,7 +126,9 @@ export const joinVoiceRoom = async (url: string, h: string) => {
     await leaveVoiceRoom()
   }
 
-  const {server_url, participant_token} = await fetchLivekitToken(url, h)
+  const {server_url, participant_token} = await fetchLivekitToken(url, h, signal)
+
+  if (signal?.aborted) throw new Error("Join cancelled")
 
   const room = new Room({
     adaptiveStream: true,
@@ -144,6 +160,17 @@ export const joinVoiceRoom = async (url: string, h: string) => {
     track.detach().forEach(el => el.remove())
   })
 
+  const onAbort = () => {
+    room.disconnect()
+  }
+  if (signal) {
+    if (signal.aborted) {
+      room.disconnect()
+      throw new Error("Join cancelled")
+    }
+    signal.addEventListener("abort", onAbort, {once: true})
+  }
+
   const CONNECT_TIMEOUT_MS = 5_000
 
   try {
@@ -158,8 +185,14 @@ export const joinVoiceRoom = async (url: string, h: string) => {
     ])
   } catch (e) {
     room.disconnect()
+    if (signal?.aborted) {
+      throw new Error("Join cancelled")
+    }
     throw e
+  } finally {
+    signal?.removeEventListener("abort", onAbort)
   }
+  if (signal?.aborted) throw new Error("Join cancelled")
   await room.localParticipant.setMicrophoneEnabled(true)
 
   currentVoiceSession.set({url, h, room, muted: false})