laravel-liberu / genealogy

app/Traits/UniqueStringTrait.php

<?php

namespace App\Traits;

use Illuminate\Support\Str;
use LaravelEnso\Companies\Models\Company;

trait UniqueStringTrait
{
    public function unique_random($table, $col, $chars = 16)

The parameter $table is not used and could be removed.

    {
        $unique = false;

        // Store tested results in array to not test them again
        $tested = [];

        do {
            // Generate random string of characters
            $random = Str::random($chars);

            // Check if it's already testing
            // If so, don't query the database again
            if (in_array($random, $tested)) {
                continue;
            }

            // Check if it is unique in the database
            $count = Company::where($col, '=', $random)->count();

            // Store the random character in the tested array
            // To keep track which ones are already tested
            $tested[] = $random;

            // String appears to be unique
            if ($count === 0) {
                // Set unique to true to break the loop
                $unique = true;
            }

            // If unique is still false at this point
            // it will just repeat all the steps until
            // it has generated a random string of characters
        } while (! $unique);

        return $random;
    }
}