Add random unique hash code trait for models

Author: codebarista

src/Traits/HasHash.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Codebarista\LaravelEssentials\Traits;
+
+use Codebarista\LaravelEssentials\Facades\DB;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Str;
+
+trait HasHash
+{
+    protected static function bootHasHash(): void
+    {
+        // create and set a unique hash code for model
+        static::creating(static function (Model $model) {
+            $table = $model->getTable();
+            if (Schema::hasColumn($table, 'hash')) {
+                $column = Schema::getColumnType($table, 'hash', true);
+                $length = preg_replace('/\D/', '', $column);
+                $model->setAttribute('hash', self::getUniqueHash($table, $length));
+            }
+        });
+    }
+
+    protected static function getUniqueHash(string $table, int $length, int $iterations = 0): ?string
+    {
+        $hash = Str::random($length);
+
+        // we've tried enough at this point
+        if ($iterations > 9) {
+            return $hash;
+        }
+
+        if (DB::table($table)->where('hash', $hash)->exists()) {
+            return self::getUniqueHash($table, $length, $iterations + 1);
+        }
+
+        return $hash;
+    }
+}