implement powerful viewer count system

2026-05-16 23:38:35 +03:30
parent 95d14f2cec
commit 799581ee52
19 changed files with 762 additions and 17 deletions
--- a/app/Services/Streaming/MediaMtxViewerCountSynchronizer.php
+++ b/app/Services/Streaming/MediaMtxViewerCountSynchronizer.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Services\Streaming;
+
+use App\Models\Broadcast;
+use App\Models\Channel;
+
+class MediaMtxViewerCountSynchronizer
+{
+    public function __construct(
+        private readonly MediaMtxApiClient $mediaMtx,
+        private readonly ViewerCountStore $viewerCounts,
+        private readonly PlaybackViewerSigner $playbackViewers,
+    ) {}
+
+    /**
+     * @return array{channels: int, viewers: int}
+     */
+    public function sync(): array
+    {
+        $sessionsByPath = $this->sessionsByPath($this->mediaMtx->hlsSessions());
+        $liveChannels = Channel::query()
+            ->where('is_live', true)
+            ->with('liveBroadcast:id,viewer_peak')
+            ->get(['id', 'slug', 'live_broadcast_id', 'viewer_count']);
+
+        $totalViewers = 0;
+
+        foreach ($liveChannels as $channel) {
+            $count = $this->uniqueViewerCount($channel, $sessionsByPath[$channel->slug] ?? []);
+            $totalViewers += $count;
+
+            $this->viewerCounts->put($channel, $count);
+
+            if ($channel->viewer_count !== $count) {
+                $channel->forceFill(['viewer_count' => $count])->save();
+            }
+
+            if ($count > 0 && $channel->live_broadcast_id) {
+                Broadcast::query()
+                    ->whereKey($channel->live_broadcast_id)
+                    ->where('viewer_peak', '<', $count)
+                    ->update(['viewer_peak' => $count]);
+            }
+        }
+
+        Channel::query()
+            ->where('is_live', false)
+            ->where('viewer_count', '>', 0)
+            ->get(['id', 'viewer_count'])
+            ->each(function (Channel $channel): void {
+                $this->viewerCounts->forget($channel);
+                $channel->forceFill(['viewer_count' => 0])->save();
+            });
+
+        return [
+            'channels' => $liveChannels->count(),
+            'viewers' => $totalViewers,
+        ];
+    }
+
+    /**
+     * @param  array<int, array{id: string, path: string, query: string, is_cdn: bool}>  $sessions
+     * @return array<string, array<int, array{id: string, path: string, query: string, is_cdn: bool}>>
+     */
+    private function sessionsByPath(array $sessions): array
+    {
+        $grouped = [];
+
+        foreach ($sessions as $session) {
+            if ($session['is_cdn']) {
+                continue;
+            }
+
+            $grouped[$session['path']][] = $session;
+        }
+
+        return $grouped;
+    }
+
+    /**
+     * @param  array<int, array{id: string, path: string, query: string, is_cdn: bool}>  $sessions
+     */
+    private function uniqueViewerCount(Channel $channel, array $sessions): int
+    {
+        $viewerKeys = [];
+
+        foreach ($sessions as $session) {
+            $viewerKey = $this->playbackViewers->viewerKeyFromQuery(
+                $session['query'],
+                $channel,
+                $channel->liveBroadcast,
+            ) ?? "session:{$session['id']}";
+
+            $viewerKeys[$viewerKey] = true;
+        }
+
+        return count($viewerKeys);
+    }
+}