Initial commit: Animexe Laravel platform

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Models/Conversation.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Conversation extends Model
+{
+    public function participants()
+    {
+        return $this->belongsToMany(User::class, 'conversation_participants')
+            ->withPivot('last_read_at');
+    }
+
+    public function messages()
+    {
+        return $this->hasMany(Message::class)->orderBy('created_at');
+    }
+
+    public function lastMessage()
+    {
+        return $this->hasOne(Message::class)->latestOfMany('created_at');
+    }
+
+    public function unreadCountFor(int $userId): int
+    {
+        $pivot = $this->participants->firstWhere('id', $userId)?->pivot;
+        $lastRead = $pivot?->last_read_at;
+
+        $q = $this->messages()->where('user_id', '!=', $userId);
+        if ($lastRead) {
+            $q->where('created_at', '>', $lastRead);
+        }
+        return $q->count();
+    }
+
+    // Find existing DM between two users or return null
+    public static function between(int $a, int $b): ?self
+    {
+        return self::whereHas('participants', fn($q) => $q->where('user_id', $a))
+            ->whereHas('participants', fn($q) => $q->where('user_id', $b))
+            ->whereHas('participants', fn($q) => $q->havingRaw('COUNT(*) = 2'), null, null, fn($q) => $q->select(\DB::raw('COUNT(*)')))
+            ->first();
+    }
+}