Implemented e-mail confirmations

app/Models/EmailConfirmation.php

@@ -1,6 +1,8 @@
 <?php
 
 namespace App\Models;
+use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Builder;
 
 /**
  * E-mail confirmation
@@ -11,15 +13,29 @@ namespace App\Models;
  * @property string $token
  * @property string $email
  * @property-read User $user
+ * @method $this|Builder valid()
  */
 class EmailConfirmation extends BaseModel
 {
     protected $guarded = [];
     const UPDATED_AT = null; // disable update timestamp
+    const EXPIRATION_H = 2; // 2h
 
     /** Authoring user */
     public function user()
     {
         return $this->belongsTo(User::class, 'user_id');
     }
+
+    public function scopeValid(Builder $query)
+    {
+        return $query->where('created_at', '>=',
+            Carbon::now()->subHours(self::EXPIRATION_H));
+    }
+
+    public function scopeExpired(Builder $query)
+    {
+        return $query->where('created_at', '<',
+            Carbon::now()->subHours(self::EXPIRATION_H));
+    }
 }