first commit

app/Models/LichSuChoiMomo.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class LichSuChoiMomo extends Model
+{
+    use HasFactory;
+
+    public function getSdtHiddenAttribute()
+    {
+        $middle_string = "";
+        $length        = strlen($this->sdt);
+        if ($length < 3) {
+            return $length == 1 ? "*" : "*".substr($this->sdt, -1);
+        } else {
+            $part_size        = floor($length / 3);
+            $middle_part_size = $length - ($part_size * 2);
+            for ($i = 0; $i < $middle_part_size; $i++) {
+                $middle_string .= "*";
+            }
+            return substr($this->sdt, 0, $part_size).$middle_string.substr($this->sdt, -$part_size);
+        }
+    }
+}