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diff --git a/lists/RegexpFactory.php b/lists/RegexpFactory.php
index a4692cf..b38635a 100755
--- a/lists/RegexpFactory.php
+++ b/lists/RegexpFactory.php
@@ -1,109 +1,157 @@
<?php
/**
* Performs operation from given a regular expression
*/
class RegexpFactory {
/**
- * The regular expression
- * @var string
+ * The regular expressions
+ * @var string[]
+ */
+ public $expressions;
+
+ /**
+ * The replacement expressions
+ * @var string[]
*/
- public $expression;
+ public $replaceExpressions;
/**
* The last error
* @var string
*/
public $lastError;
+ /**
+ * Regular expression to delimit regexps/replaces
+ */
+ const DELIMITER = '/\r\n|\n|\r/';
+
/**
* Initializes a new instance of the RegexpFactory object.
*
- * @param string The regular expression
+ * @param string $rexpressions The regular expression
+ * @param string $replaceExpressions The format of the result string
*/
- function __construct ($expression) {
- $this->expression = $expression;
+ function __construct ($expressions, $replaceExpressions) {
+ $this->expressions = preg_split(static::DELIMITER, $expressions);
+ $this->replaceExpressions = preg_split(static::DELIMITER, $replaceExpressions);
+
+ if (count($this->expressions) != count($this->replaceExpressions)) {
+ throw new Exception("The number of expressions and replacements should match.");
+ }
}
/**
* Replaces an expression using regexp, a similar way Apache mod_rewrite and Nginx wreplace do.
*
* @param string $haystack The expression to perform a replacement on
- * @param string $replaceExpression The format of the result string
* @return string The replaced string
*/
- function replace ($haystack, $replaceExpression) {
- return preg_replace($this->expression, $replaceExpression, $haystack);
+ function replace ($haystack) {
+ $text = $haystack;
+ for ($i = 0 ; $i < count($this->expressions) ; $i++) {
+ $expression = $this->expressions[$i];
+ $replaceExpression = $this->replaceExpressions[$i];
+ $text = preg_replace($expression, $replaceExpression, $text);
+ }
+ return $text;
+ }
+
+ /**
+ * Adds delimiters to each regular expression.
+ */
+ public function addDelimiters () {
+ array_walk($this->expressions, function (&$item) {
+ $item = RegexpFactory::addDelimitersToExpression($item);
+ });
}
/**
- * Encloses the regular expression with delimiters.
+ * Encloses the specified regular expression with delimiters.
+ *
+ * @param string $expression The expression to delimit
+ * @return string The expression with delimiters
*/
- function addDelimiters () {
+ public static function addDelimitersToExpression ($expression) {
$delimiters = ['/', '@', '#', '~', '+', '%', '♦', 'µ', '±', '☞'];
//TODO: check if it's okay to use UTF-8 characters as delimiters
foreach ($delimiters as $delimiter) {
- if (strpos($this->expression, $delimiter) === false) {
- $this->expression = $delimiter . $this->expression . $delimiter;
- return;
+ if (strpos($expression, $delimiter) === false) {
+ return $delimiter . $expression . $delimiter;
+ }
+ }
+ throw new Exception("Can't delimite regexp $expression");
+ }
+
+ /**
+ * Determines if the specified expression block is valid.
+ *
+ * @return bool true if each expression is valid; otherwise, false.
+ */
+ public function isValid () {
+ foreach ($this->expressions as $expression) {
+ if (!$this->isValidExpression($expression)) {
+ return false;
}
}
- throw new Exception("Can't delimite regexp $this->expression");
+ return true;
}
/**
* Determines if the specified expression is valid.
*
+ * @param string the regexp to test
* @return bool true if the expression is valid; otherwise, false.
*/
- public function isValid () {
+ public function isValidExpression ($expression) {
$this->lastError = '';
set_error_handler('self::handleErrors');
- $result = preg_match($this->expression, null);
+ $result = preg_match($expression, null);
restore_error_handler();
if ($this->lastError === '' && $result === false) {
$this->lastError = self::getPCREError();
}
return $result !== false;
}
/**
* Callback for error handler
*
* @param int $errno he level of the error raised
* @param string $errstr the error message
* @return bool if false, the normal error handler continues
*/
private function handleErrors ($errno, $errstr) {
if ($errno == 2 && substr($errstr, 0, 14) == 'preg_match(): ') {
$this->lastError = substr($errstr, 14);
if (substr($this->lastError, 0, 20) == 'Compilation failed: ') {
$this->lastError = ucfirst(substr($this->lastError, 20));
}
return true;
}
message_die(
GENERAL_ERROR,
$errstr . "<p>Please report this bug. This error should be handled by the regexp factory.</p>",
'Regexp factory error'
);
}
/**
* Gets a string with an English error message matching the last PCRE error.
*
* @return The error message of the last PCRE library error.
*/
public static function getPCREError() {
$errors = array(
PREG_NO_ERROR => 'No error',
PREG_INTERNAL_ERROR => 'There was an internal PCRE error',
PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
PREG_BAD_UTF8_ERROR => 'The offset didn\'t correspond to the begin of a valid UTF-8 code point',
PREG_BAD_UTF8_OFFSET_ERROR => 'Malformed UTF-8 data',
);
return $errors[preg_last_error()];
}
}

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