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<?php |
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/* |
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* This file is part of the JVal package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace JVal; |
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use JVal\Exception\JsonDecodeException; |
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/** |
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* Exposes common utility methods. |
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*/ |
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class Utils |
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{ |
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private static $jsonErrors = [ |
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JSON_ERROR_NONE => 'No errors', |
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JSON_ERROR_DEPTH => 'Maximum stack depth exceeded', |
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JSON_ERROR_STATE_MISMATCH => 'Underflow or the modes mismatch', |
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JSON_ERROR_CTRL_CHAR => 'Unexpected control character found', |
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JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON', |
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JSON_ERROR_UTF8 => 'Malformed UTF-8 characters, possibly incorrectly encoded', |
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]; |
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/** |
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* Returns whether two variables are equal. Always compares |
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* values, not references, and walks each variable recursively |
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* if needed. |
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* |
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* @param mixed $a |
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* @param mixed $b |
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* |
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* @return bool |
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*/ |
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public static function areEqual($a, $b) |
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{ |
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return self::doAreEqual($a, $b, []); |
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} |
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/** |
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* Returns whether a regex is valid. Regex is supposed to be |
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* non-anchored (see JSON Schema Validation 3.3). |
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* |
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* @param string $regex |
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* |
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* @return bool |
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*/ |
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public static function isValidRegex($regex) |
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{ |
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$regex = str_replace('/', '\/', $regex); |
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return @preg_match("/{$regex}/", '') !== false; |
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} |
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/** |
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* Returns whether a string matches a regex. Regex is supposed to be |
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* non-anchored (see JSON Schema Validation 3.3). |
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* |
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* @param string $string |
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* @param string $regex |
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* |
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* @return bool |
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*/ |
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public static function matchesRegex($string, $regex) |
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{ |
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$regex = str_replace('/', '\/', $regex); |
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return preg_match("/{$regex}/", $string) > 0; |
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} |
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/** |
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* Returns the JSON-decoded content of a file. |
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* |
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* @param $filePath |
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* |
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* @return mixed |
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* |
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* @throws \RuntimeException |
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* @throws JsonDecodeException |
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*/ |
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public static function loadJsonFromFile($filePath) |
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{ |
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if (!file_exists($filePath)) { |
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throw new \RuntimeException("File '{$filePath}' doesn't exist"); |
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} |
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$content = json_decode(file_get_contents($filePath)); |
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if (json_last_error() !== JSON_ERROR_NONE) { |
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throw new JsonDecodeException(sprintf( |
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'Cannot decode JSON from file "%s" (error: %s)', |
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$filePath, |
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static::lastJsonErrorMessage() |
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)); |
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} |
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return $content; |
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} |
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/** |
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* @codeCoverageIgnore (depends on PHP version) |
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* |
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* Returns the error message resulting from the last call to |
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* json_encode or json_decode functions. |
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* |
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* @return string |
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*/ |
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public static function lastJsonErrorMessage() |
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{ |
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if (defined('json_last_error_msg')) { |
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return json_last_error_msg(); |
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} |
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$lastError = json_last_error(); |
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if (isset(self::$jsonErrors[$lastError])) { |
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return self::$jsonErrors[$lastError]; |
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} |
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return 'Unknown error'; |
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} |
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private static function doAreEqual($a, $b, array $stack) |
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{ |
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// keep track of object references to avoid infinite recursion |
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if (is_object($a)) { |
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if (in_array($a, $stack)) { |
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return true; |
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} |
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$stack[] = $a; |
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} |
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if (gettype($a) !== gettype($b)) { |
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return false; |
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} |
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if (is_object($a)) { |
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$a = (array) $a; |
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$b = (array) $b; |
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ksort($a); |
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ksort($b); |
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} |
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if (is_array($a)) { |
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return self::areArrayEqual($a, $b, $stack); |
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} |
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return $a === $b; |
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} |
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private static function areArrayEqual($a, $b, array $stack) |
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{ |
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if (count($a) !== count($b)) { |
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return false; |
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} |
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foreach ($a as $key => $value) { |
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if (!array_key_exists($key, $b)) { |
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return false; |
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} |
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if (!self::doAreEqual($value, $b[$key], $stack)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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stefk /
JVal
