Kaylyu\Alipay\Kernel\Support\Str

Complexity

Total Complexity

21

Size/Duplication

Total Lines	193
Duplicated Lines	0 %

Coupling/Cohesion

Components	2
Dependencies	1

Test Coverage

Coverage

0%

Importance

Changes

0

9 Methods

Rating	Name	Duplication	Size	Complexity
A	camel()	0	8	2
A	random()	0	14	2
A	randomBytes()	0	15	5
A	quickRandom()	0	6	1
A	upper()	0	4	1
A	title()	0	4	1
A	snake()	0	14	3
A	studly()	0	12	2
A	startsWith()	0	10	4

<?php

namespace Kaylyu\Alipay\Kernel\Support;

use Kaylyu\Alipay\Kernel\Exceptions\RuntimeException;


/**
 * Class Str.
 */
class Str
{
    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    protected static $snakeCache = [];

    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    protected static $camelCache = [];

    /**
     * The cache of studly-cased words.
     *
     * @var array
     */
    protected static $studlyCache = [];

    /**
     * Convert a value to camel case.
     *
     * @param string $value
     *
     * @return string
     */
    public static function camel($value)
    {
        if (isset(static::$camelCache[$value])) {
            return static::$camelCache[$value];
        }

        return static::$camelCache[$value] = lcfirst(static::studly($value));
    }

    /**
     * Generate a more truly "random" alpha-numeric string.
     *
     * @param int $length
     *
     * @return string
     *
     * @throws \RuntimeException
     */
    public static function random($length = 16)
    {
        $string = '';

        while (($len = strlen($string)) < $length) {
            $size = $length - $len;

            $bytes = static::randomBytes($size);

            $string .= substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, $size);
        }

        return $string;
    }

    /**
     * Generate a more truly "random" bytes.
     *
     * @param int $length
     *
     * @return string
     *
     * @throws RuntimeException
     *
     * @codeCoverageIgnore
     *
     * @throws \Exception
     */
    public static function randomBytes($length = 16)
    {
        if (function_exists('random_bytes')) {
            $bytes = random_bytes($length);
        } elseif (function_exists('openssl_random_pseudo_bytes')) {
            $bytes = openssl_random_pseudo_bytes($length, $strong);
            if (false === $bytes || false === $strong) {
                throw new RuntimeException('Unable to generate random string.');
            }
        } else {
            throw new RuntimeException('OpenSSL extension is required for PHP 5 users.');
        }

        return $bytes;
    }

    /**
     * Generate a "random" alpha-numeric string.
     *
     * Should not be considered sufficient for cryptography, etc.
     *
     * @param int $length
     *
     * @return string
     */
    public static function quickRandom($length = 16)
    {
        $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

        return substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
    }

    /**
     * Convert the given string to upper-case.
     *
     * @param string $value
     *
     * @return string
     */
    public static function upper($value)
    {
        return mb_strtoupper($value);
    }

    /**
     * Convert the given string to title case.
     *
     * @param string $value
     *
     * @return string
     */
    public static function title($value)
    {
        return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
    }

    /**
     * Convert a string to snake case.
     *
     * @param string $value
     * @param string $delimiter
     *
     * @return string
     */
    public static function snake($value, $delimiter = '_')
    {
        $key = $value.$delimiter;

        if (isset(static::$snakeCache[$key])) {
            return static::$snakeCache[$key];
        }

        if (!ctype_lower($value)) {
            $value = strtolower(preg_replace('/(.)(?=[A-Z])/', '$1'.$delimiter, $value));
        }

        return static::$snakeCache[$key] = trim($value, '_');
    }

    /**
     * Convert a value to studly caps case.
     *
     * @param string $value
     *
     * @return string
     */
    public static function studly($value)
    {
        $key = $value;

        if (isset(static::$studlyCache[$key])) {
            return static::$studlyCache[$key];
        }

        $value = ucwords(str_replace(['-', '_'], ' ', $value));

        return static::$studlyCache[$key] = str_replace(' ', '', $value);
    }

    /**
     * Determine if a given string starts with a given substring.
     *
     * @param  string  $haystack
     * @param  string|array  $needles
     * @return bool
     */
    public static function startsWith($haystack, $needles)
    {
        foreach ((array) $needles as $needle) {
            if ($needle !== '' && substr($haystack, 0, strlen($needle)) === (string) $needle) {
                return true;
            }
        }

        return false;
    }
}