1:  2:  3:  4:  5:  6:  7:  8:  9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 56: 57: 58: 59: 60: 61: 62: 63: 64: 65: 66: 67: 68: 69: 70: 71: 72: 73: 74: 75: 76: 77: 78: 79: 80: 81: 82: 83: 84: 85: 86: 87: 88: 89: 90: 

<?php

/*
 * This file is part of the Incipio package.
 *
 * (c) Théo FIDRY <theo.fidry@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ApiBundle\DataFixtures\Faker\Provider;

use Faker\Generator;

/**
 * @see    ApiBundle\Entity\StudentConvention
 *
 * @author Théo FIDRY <theo.fidry@gmail.com>
 */
class StudentConventionProvider
{
    /**
     * @var Generator
     */
    private $faker;

    /**
     * @param Generator $faker
     */
    public function __construct(Generator $faker)
    {
        $this->faker = $faker;
    }

    /**
     * Generates a student convention reference from the student full name and the date of signature of the convention.
     *
     * @param \DateTime   $dateOfSignature
     * @param string|null $fullname        If is null, a random name is used instead
     *
     * @return string
     */
    public function generateReference(\DateTime $dateOfSignature, $fullname = null)
    {
        if (null === $fullname || '' === $fullname) {
            // It does not matter if the Faker instance is not based on the application locale as we don't really
            // care of the real value of the name. Keeping this avoid having to inject a faker instance which is
            // more difficul to properly test.
            $fullname = $this->faker->name();
        }

        $fullnameParts = array_merge(explode(' ', $this->normalizeString($fullname)), ['a', 'b', 'c', 'd', 'e', 'f']);

        $reference = '';
        foreach ($fullnameParts as $part) {
            $referenceLength = strlen($reference);
            if (6 === $referenceLength) {
                break;
            }

            $remaining = 6 - $referenceLength;
            if (3 < $remaining) {
                $remaining = 3;
            }

            $reference .= substr($part, 0, $remaining);
        }

        $reference .= $dateOfSignature->format('Ymd');

        return strtoupper($reference);
    }

    /**
     * Removes any non letter characters from the string except for whitespaces.
     *
     * @param string $string
     *
     * @return string
     */
    private function normalizeString($string)
    {
        $string = str_replace(' ', '______', $string);      // Secure spaces
        $string = preg_replace('/[^A-Za-z\_]/', '', $string); // Removes special characters

        return str_replace('______', ' ', $string);
    }
}