feat: show voice room participants before joining

src/app/call/voice.ts

@@ -19,6 +19,7 @@ import {map, not, nthEq, reject, removeUndefined, uniqBy} from "@welshman/lib"
 import type {TrustedEvent} from "@welshman/util"
 import {makeHttpAuth, makeHttpAuthHeader, getTags} from "@welshman/util"
 import {signer} from "@welshman/app"
+import {load} from "@welshman/net"
 import {getLivekitEndpoint} from "$lib/livekit"
 import {AbortError, TimeoutError, whenAborted, whenTimeout} from "$lib/util"
 import {
@@ -154,6 +155,12 @@ const fetchLivekitToken = async (
   return response.json()
 }
 
+export const loadVoiceParticipants = (url: string, h: string) =>
+  load({
+    relays: [url],
+    filters: [{kinds: [LIVEKIT_PARTICIPANTS], "#d": [h]}],
+  })
+
 export const deriveVoiceParticipants = (url: string, h: string) =>
   // We use the livekit identity list while in a call, and fall back to the list in kind 39004.
   derived(
@@ -173,7 +180,7 @@ export const deriveVoiceParticipants = (url: string, h: string) =>
         if (!latestEvent) return []
         const participants = removeUndefined(
           map(
-            (tag: string[]) => (tag[1] ? {pubkey: tag[1], identity: tag[1]} : undefined),
+            (tag: string[]) => (tag[1] ? participantFromLiveKitIdentity(tag[1]) : undefined),
             getTags("participant", latestEvent.tags),
           ),
         )

src/app/components/ProfileCircles.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import cx from "classnames"
   import {getProfile, loadProfile} from "@welshman/app"
   import {isMobile} from "@lib/html"
   import ProfileCircle from "@app/components/ProfileCircle.svelte"
@@ -6,10 +7,20 @@
   type Props = {
     pubkeys: string[]
     size?: number
+    limit?: number
+    class?: string
   }
 
-  const {pubkeys, size = 7}: Props = $props()
-  const limit = isMobile ? 7 : 10
+  const {pubkeys, size = 7, limit, class: className}: Props = $props()
+  const effectiveLimit = $derived(limit ?? (isMobile ? 7 : 10))
+
+  const dimensions = $derived(
+    size <= 5
+      ? {box: "h-5 w-5", overlap: "-mr-2", overflow: "text-[9px]"}
+      : size <= 6
+        ? {box: "h-6 w-6", overlap: "-mr-2.5", overflow: "text-[10px]"}
+        : {box: "h-8 w-8", overlap: "-mr-3", overflow: "text-xs"},
+  )
 
   for (const pubkey of pubkeys) {
     loadProfile(pubkey)
@@ -20,13 +31,31 @@
 
     return filtered.length > 0 ? filtered : pubkeys.slice(0, 1)
   })
+
+  const displayPubkeys = $derived(visiblePubkeys.toSorted().slice(0, effectiveLimit))
+  const overflowCount = $derived(Math.max(0, pubkeys.length - effectiveLimit))
 </script>
 
-<div class="flex pr-3">
-  {#each visiblePubkeys.toSorted().slice(0, limit) as pubkey (pubkey)}
+<div class={cx("flex", size <= 5 ? "pr-2" : "pr-3", className)}>
+  {#each displayPubkeys as pubkey (pubkey)}
     <div
-      class="z-feature -mr-3 inline-block flex h-8 w-8 items-center justify-center rounded-full bg-base-100">
-      <ProfileCircle class="h-8 w-8 bg-base-300" {pubkey} {size} />
+      class={cx(
+        "z-feature inline-block flex items-center justify-center rounded-full bg-base-100",
+        dimensions.box,
+        dimensions.overlap,
+      )}>
+      <ProfileCircle class={cx(dimensions.box, "bg-base-300")} {pubkey} {size} />
     </div>
   {/each}
+  {#if overflowCount > 0}
+    <div
+      class={cx(
+        "z-feature inline-flex items-center justify-center rounded-full bg-neutral font-medium text-neutral-content",
+        dimensions.box,
+        dimensions.overlap,
+        dimensions.overflow,
+      )}>
+      +{overflowCount}
+    </div>
+  {/if}
 </div>

src/app/components/VoiceRoomItem.svelte

@@ -4,6 +4,7 @@
   import {loadProfile, displayProfileByPubkey} from "@welshman/app"
   import SecondaryNavItem from "@lib/components/SecondaryNavItem.svelte"
   import ProfileCircle from "@app/components/ProfileCircle.svelte"
+  import ProfileCircles from "@app/components/ProfileCircles.svelte"
   import RoomImage from "@app/components/RoomImage.svelte"
   import RoomName from "@app/components/RoomName.svelte"
   import {makeRoomPath} from "@app/util/routes"
@@ -20,7 +21,11 @@
     voiceState,
     type VoiceParticipant,
   } from "@app/call/stores"
-  import {cancelJoinVoiceRoom, deriveVoiceParticipants} from "@app/call/voice"
+  import {
+    cancelJoinVoiceRoom,
+    deriveVoiceParticipants,
+    loadVoiceParticipants,
+  } from "@app/call/voice"
 
   interface Props {
     url: string
@@ -32,6 +37,7 @@
   const {url, h, replaceState = false, notification = false}: Props = $props()
 
   const participants = deriveVoiceParticipants(url, h)
+  const participantPubkeys = $derived($participants.flatMap(p => (p.pubkey ? [p.pubkey] : [])))
   const isActive = $derived(
     $voiceState === VoiceState.Connected && $currentVoiceRoom?.id === makeRoomId(url, h),
   )
@@ -53,6 +59,10 @@
     pushModal(VoiceRoomJoinDialog, {url, h})
   }
 
+  $effect(() => {
+    void loadVoiceParticipants(url, h)
+  })
+
   $effect(() => {
     for (const p of $participants) {
       if (p.pubkey) loadProfile(p.pubkey)
@@ -75,29 +85,33 @@
       {/if}
       <RoomName {url} {h} />
     </div>
-    {#if $participants.length > 0}
-      {#each $participants as p (participantKey(p as VoiceParticipant))}
-        <div class="flex items-center gap-2 ml-6">
-          <div
-            class={cx(
-              "inline-flex shrink-0 items-center justify-center rounded-full transition-shadow",
-              isActive && $isParticipantSpeaking(p) && "ring-2 ring-success",
-            )}>
-            <ProfileCircle pubkey={p.pubkey} size={5} class="h-5 w-5" />
-          </div>
-          <span class="ellipsize min-w-0 flex-1 text-xs opacity-70">
-            {p.pubkey ? displayProfileByPubkey(p.pubkey) : "Unknown"}
-          </span>
-          {#if isActive}
-            {@const media = $mediaStateByIdentity(p.identity)}
+    {#if participantPubkeys.length > 0}
+      {#if isActive}
+        {#each $participants as p (participantKey(p as VoiceParticipant))}
+          {@const media = $mediaStateByIdentity(p.identity)}
+          <div class="flex items-center gap-2 ml-6">
+            <div
+              class={cx(
+                "inline-flex shrink-0 items-center justify-center rounded-full transition-shadow",
+                $isParticipantSpeaking(p) && "ring-2 ring-success",
+              )}>
+              <ProfileCircle pubkey={p.pubkey} size={5} class="h-5 w-5" />
+            </div>
+            <span class="ellipsize min-w-0 flex-1 text-xs opacity-70">
+              {p.pubkey ? displayProfileByPubkey(p.pubkey) : "Unknown"}
+            </span>
             <VoiceParticipantMediaBadges
               muted={media.muted}
               cameraOn={media.cameraOn}
               size={3}
               class="shrink-0" />
-          {/if}
+          </div>
+        {/each}
+      {:else}
+        <div class="ml-6">
+          <ProfileCircles pubkeys={participantPubkeys} size={5} limit={3} />
         </div>
-      {/each}
+      {/if}
     {/if}
   </div>
 </SecondaryNavItem>

src/app/components/VoiceRoomJoinDialog.svelte

@@ -13,8 +13,9 @@
   import ModalSubtitle from "@lib/components/ModalSubtitle.svelte"
   import ModalTitle from "@lib/components/ModalTitle.svelte"
   import {AbortError, TimeoutError} from "$lib/util"
+  import ProfileCircles from "@app/components/ProfileCircles.svelte"
   import {displayRoom} from "@app/core/state"
-  import {joinVoiceRoom} from "@app/call/voice"
+  import {deriveVoiceParticipants, joinVoiceRoom, loadVoiceParticipants} from "@app/call/voice"
   import {popModal} from "@app/util/modal"
   import {pushToast} from "@app/util/toast"
 
@@ -26,6 +27,8 @@
   const {url, h}: Props = $props()
 
   const spaceLabel = $derived(displayRelayUrl(url))
+  const participants = deriveVoiceParticipants(url, h)
+  const participantPubkeys = $derived($participants.flatMap(p => (p.pubkey ? [p.pubkey] : [])))
 
   let audioInputs = $state<MediaDeviceInfo[]>([])
   let selectedDeviceId = $state("")
@@ -42,6 +45,7 @@
   }
 
   $effect(() => {
+    void loadVoiceParticipants(url, h)
     void loadDevices()
   })
 
@@ -81,6 +85,11 @@
         </span>
       </ModalSubtitle>
     </ModalHeader>
+    {#if participantPubkeys.length > 0}
+      <div class="flex justify-center py-2">
+        <ProfileCircles pubkeys={participantPubkeys} size={5} limit={3} />
+      </div>
+    {/if}
     <p class="text-sm opacity-80">Select a microphone to join the call:</p>
     <div class="flex flex-col gap-4 pt-2">
       <div class="flex items-center gap-2">