messages implemented

app/Http/Controllers/Api/Messaging/TypingController.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace App\Http\Controllers\Api\Messaging;
+
+use App\Events\TypingStarted;
+use App\Events\TypingStopped;
+use App\Http\Controllers\Controller;
+use App\Models\ConversationParticipant;
+use Illuminate\Cache\Repository;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cache;
+
+class TypingController extends Controller
+{
+    public function start(Request $request, int $conversationId): JsonResponse
+    {
+        $this->assertParticipant($request, $conversationId);
+
+        $ttl = max(5, (int) config('messaging.typing.ttl_seconds', 8));
+        $this->store()->put($this->key($conversationId, (int) $request->user()->id), 1, now()->addSeconds($ttl));
+
+        if ((bool) config('messaging.realtime', false)) {
+            event(new TypingStarted($conversationId, (int) $request->user()->id));
+        }
+
+        return response()->json(['ok' => true]);
+    }
+
+    public function stop(Request $request, int $conversationId): JsonResponse
+    {
+        $this->assertParticipant($request, $conversationId);
+        $this->store()->forget($this->key($conversationId, (int) $request->user()->id));
+
+        if ((bool) config('messaging.realtime', false)) {
+            event(new TypingStopped($conversationId, (int) $request->user()->id));
+        }
+
+        return response()->json(['ok' => true]);
+    }
+
+    public function index(Request $request, int $conversationId): JsonResponse
+    {
+        $this->assertParticipant($request, $conversationId);
+        $userId = (int) $request->user()->id;
+
+        $participants = ConversationParticipant::query()
+            ->where('conversation_id', $conversationId)
+            ->whereNull('left_at')
+            ->where('user_id', '!=', $userId)
+            ->with('user:id,username')
+            ->get();
+
+        $typing = $participants
+            ->filter(fn ($p) => $this->store()->has($this->key($conversationId, (int) $p->user_id)))
+            ->map(fn ($p) => [
+                'user_id' => (int) $p->user_id,
+                'username' => (string) ($p->user->username ?? ''),
+            ])
+            ->values();
+
+        return response()->json(['typing' => $typing]);
+    }
+
+    private function assertParticipant(Request $request, int $conversationId): void
+    {
+        abort_unless(
+            ConversationParticipant::query()
+                ->where('conversation_id', $conversationId)
+                ->where('user_id', $request->user()->id)
+                ->whereNull('left_at')
+                ->exists(),
+            403,
+            'You are not a participant of this conversation.'
+        );
+    }
+
+    private function key(int $conversationId, int $userId): string
+    {
+        return "typing:{$conversationId}:{$userId}";
+    }
+
+    private function store(): Repository
+    {
+        $store = (string) config('messaging.typing.cache_store', 'redis');
+        if ($store === 'redis' && ! class_exists('Redis')) {
+            return Cache::store();
+        }
+
+        try {
+            return Cache::store($store);
+        } catch (\Throwable) {
+            return Cache::store();
+        }
+    }
+}