Initial project

app/Livewire/Chat/MessageComposer.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace App\Livewire\Chat;
+
+use App\Models\Conversation;
+use App\Models\ConversationParticipant;
+use App\Models\Message;
+use Illuminate\Contracts\View\View;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Gate;
+use Livewire\Attributes\Locked;
+use Livewire\Component;
+
+class MessageComposer extends Component
+{
+    #[Locked]
+    public int $conversationId;
+
+    public string $body = '';
+
+    public function mount(int $conversationId): void
+    {
+        $this->conversationId = $conversationId;
+
+        $this->conversation();
+    }
+
+    public function sendMessage(): void
+    {
+        $this->body = trim($this->body);
+
+        $validated = $this->validate([
+            'body' => ['required', 'string', 'max:4000'],
+        ], [
+            'body.required' => __('Write a message before sending.'),
+        ]);
+
+        $conversation = $this->conversation();
+
+        Gate::authorize('sendMessage', $conversation);
+
+        $message = Message::query()->create([
+            'conversation_id' => $conversation->id,
+            'user_id' => Auth::id(),
+            'type' => Message::TypeText,
+            'body' => $validated['body'],
+        ]);
+
+        $conversation->touch();
+
+        ConversationParticipant::query()
+            ->where('conversation_id', $conversation->id)
+            ->where('user_id', Auth::id())
+            ->update(['last_read_at' => now()]);
+
+        $this->reset('body');
+        $this->resetValidation();
+
+        $this->dispatch('message-created', conversationId: $conversation->id, messageId: $message->id);
+    }
+
+    private function conversation(): Conversation
+    {
+        $conversation = Conversation::query()
+            ->forUser(Auth::user())
+            ->findOrFail($this->conversationId);
+
+        Gate::authorize('sendMessage', $conversation);
+
+        return $conversation;
+    }
+
+    public function render(): View
+    {
+        return view('livewire.chat.message-composer');
+    }
+}