First commit

app/Models/ChatSession.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Str;
+
+class ChatSession extends Model
+{
+    protected $fillable = [
+        'session_token',
+        'user_id',
+        'category_id',
+        'ip_address',
+        'user_agent',
+        'last_activity_at',
+    ];
+
+    protected $casts = [
+        'last_activity_at' => 'datetime',
+    ];
+
+    // Auto-generate session token
+    protected static function booted(): void
+    {
+        static::creating(function (ChatSession $session) {
+            if (empty($session->session_token)) {
+                $session->session_token = Str::random(48);
+            }
+        });
+    }
+
+    // === Relationships ===
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    public function logs(): HasMany
+    {
+        return $this->hasMany(ChatLog::class)->orderBy('created_at');
+    }
+
+    // === Helpers ===
+
+    public function touch($attribute = null): bool
+    {
+        return $this->update(['last_activity_at' => now()]);
+    }
+}