Cache some calls to Mongo for performance

app/Models/Echoarea.php

@@ -2,15 +2,18 @@
 
 namespace App\Models;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
-
+use Illuminate\Support\Facades\Cache;
 use App\Traits\{ScopeActive,UsePostgres};
 
 class Echoarea extends Model
 {
 	use SoftDeletes,ScopeActive,UsePostgres;
 
+	private const CACHE_TIME = 3600;
+
 	/* RELATIONS */
 
 	public function addresses()
@@ -28,4 +31,35 @@ class Echoarea extends Model
 		return Echomail::select('*')
 			->where('echoarea_id',$this->id);
 	}
+
+	/* ATTRIBUTES */
+
+	public function getLastMessageAttribute(): ?Carbon
+	{
+		$key = sprintf('%s_%d','echo_last_message',$this->id);
+
+		return Cache::driver('redis')->remember($key,self::CACHE_TIME,function() {
+			return ($x=$this->echomail()->orderBy('datetime','DESC')->first()) ? $x->datetime : NULL;
+		});
+	}
+
+	/* METHODS */
+
+	public function messages_count(int $period): int
+	{
+		$key = sprintf('%s_%d_%d','echo_mesages_count',$this->id,$period);
+
+		return Cache::driver('redis')->remember($key,self::CACHE_TIME,function() use ($period) {
+			switch ($period) {
+				case 1: // day
+					return $this->echomail()->where('datetime','>=',Carbon::now()->startOfday()->subDay())->count();
+				case 7: // week
+					return $this->echomail()->where('datetime','>=',Carbon::now()->startOfday()->subWeek())->count();
+				case 30: // month
+					return $this->echomail()->where('datetime','>=',Carbon::now()->startOfday()->subMonth())->count();
+				default:
+					return 0;
+			}
+		});
+	}
 }