/**
* Parse mask and array of default values; initializes object.
* @param string
* @param array
* @return void
*/
private function setMask($mask, array $metadata)
{
$this->mask = $mask;
// detect '//host/path' vs. '/abs. path' vs. 'relative path'
if (substr($mask, 0, 2) === '//') {
$this->type = self::HOST;
} elseif (substr($mask, 0, 1) === '/') {
$this->type = self::PATH;
} else {
$this->type = self::RELATIVE;
}
foreach ($metadata as $name => $meta) {
if (!is_array($meta)) {
$metadata[$name] = array(self::VALUE => $meta, 'fixity' => self::CONSTANT);
} elseif (array_key_exists(self::VALUE, $meta)) {
$metadata[$name]['fixity'] = self::CONSTANT;
}
}
// PARSE MASK
// <parameter-name[=default] [pattern] [#class]> or [ or ] or ?...
$parts = Strings::split($mask, '/<([^>#= ]+)(=[^># ]*)? *([^>#]*)(#?[^>\\[\\]]*)>|(\\[!?|\\]|\\s*\\?.*)/');
$this->xlat = array();
$i = count($parts) - 1;
// PARSE QUERY PART OF MASK
if (isset($parts[$i - 1]) && substr(ltrim($parts[$i - 1]), 0, 1) === '?') {
// name=<parameter-name [pattern][#class]>
$matches = Strings::matchAll($parts[$i - 1], '/(?:([a-zA-Z0-9_.-]+)=)?<([^># ]+) *([^>#]*)(#?[^>]*)>/');
foreach ($matches as $match) {
list(, $param, $name, $pattern, $class) = $match;
// $pattern is not used
if ($class !== '') {
if (!isset(self::$styles[$class])) {
throw new InvalidStateException("Parameter '{$name}' has '{$class}' flag, but Route::\$styles['{$class}'] is not set.");
}
$meta = self::$styles[$class];
} elseif (isset(self::$styles['?' . $name])) {
$meta = self::$styles['?' . $name];
} else {
$meta = self::$styles['?#'];
}
if (isset($metadata[$name])) {
$meta = $metadata[$name] + $meta;
}
if (array_key_exists(self::VALUE, $meta)) {
$meta['fixity'] = self::OPTIONAL;
}
unset($meta['pattern']);
$meta['filterTable2'] = empty($meta[self::FILTER_TABLE]) ? NULL : array_flip($meta[self::FILTER_TABLE]);
$metadata[$name] = $meta;
if ($param !== '') {
$this->xlat[$name] = $param;
}
}
$i -= 6;
}
// PARSE PATH PART OF MASK
$brackets = 0;
// optional level
$re = '';
$sequence = array();
$autoOptional = TRUE;
do {
array_unshift($sequence, $parts[$i]);
$re = preg_quote($parts[$i], '#') . $re;
if ($i === 0) {
break;
}
$i--;
$part = $parts[$i];
// [ or ]
if ($part === '[' || $part === ']' || $part === '[!') {
$brackets += $part[0] === '[' ? -1 : 1;
if ($brackets < 0) {
throw new InvalidArgumentException("Unexpected '{$part}' in mask '{$mask}'.");
}
array_unshift($sequence, $part);
$re = ($part[0] === '[' ? '(?:' : ')?') . $re;
$i -= 5;
continue;
}
$class = $parts[$i];
$i--;
// validation class
$pattern = trim($parts[$i]);
$i--;
// validation condition (as regexp)
$default = $parts[$i];
$i--;
// default value
$name = $parts[$i];
$i--;
// parameter name
array_unshift($sequence, $name);
if ($name[0] === '?') {
// "foo" parameter
$re = '(?:' . preg_quote(substr($name, 1), '#') . '|' . $pattern . ')' . $re;
$sequence[1] = substr($name, 1) . $sequence[1];
continue;
}
// check name (limitation by regexp)
if (preg_match('#[^a-z0-9_-]#i', $name)) {
throw new InvalidArgumentException("Parameter name must be alphanumeric string due to limitations of PCRE, '{$name}' given.");
}
// pattern, condition & metadata
if ($class !== '') {
if (!isset(self::$styles[$class])) {
throw new InvalidStateException("Parameter '{$name}' has '{$class}' flag, but Route::\$styles['{$class}'] is not set.");
}
$meta = self::$styles[$class];
} elseif (isset(self::$styles[$name])) {
$meta = self::$styles[$name];
} else {
$meta = self::$styles['#'];
}
if (isset($metadata[$name])) {
$meta = $metadata[$name] + $meta;
}
if ($pattern == '' && isset($meta[self::PATTERN])) {
$pattern = $meta[self::PATTERN];
}
if ($default !== '') {
$meta[self::VALUE] = (string) substr($default, 1);
$meta['fixity'] = self::PATH_OPTIONAL;
}
$meta['filterTable2'] = empty($meta[self::FILTER_TABLE]) ? NULL : array_flip($meta[self::FILTER_TABLE]);
if (array_key_exists(self::VALUE, $meta)) {
if (isset($meta['filterTable2'][$meta[self::VALUE]])) {
$meta['defOut'] = $meta['filterTable2'][$meta[self::VALUE]];
} elseif (isset($meta[self::FILTER_OUT])) {
$meta['defOut'] = call_user_func($meta[self::FILTER_OUT], $meta[self::VALUE]);
} else {
$meta['defOut'] = $meta[self::VALUE];
}
}
$meta[self::PATTERN] = "#(?:{$pattern})\$#A" . ($this->flags & self::CASE_SENSITIVE ? '' : 'iu');
// include in expression
$re = '(?P<' . str_replace('-', '___', $name) . '>(?U)' . $pattern . ')' . $re;
// str_replace is dirty trick to enable '-' in parameter name
if ($brackets) {
// is in brackets?
if (!isset($meta[self::VALUE])) {
$meta[self::VALUE] = $meta['defOut'] = NULL;
}
$meta['fixity'] = self::PATH_OPTIONAL;
} elseif (!$autoOptional) {
unset($meta['fixity']);
} elseif (isset($meta['fixity'])) {
// auto-optional
$re = '(?:' . $re . ')?';
$meta['fixity'] = self::PATH_OPTIONAL;
} else {
$autoOptional = FALSE;
}
$metadata[$name] = $meta;
} while (TRUE);
if ($brackets) {
throw new InvalidArgumentException("Missing closing ']' in mask '{$mask}'.");
}
$this->re = '#' . $re . '/?$#A' . ($this->flags & self::CASE_SENSITIVE ? '' : 'iu');
$this->metadata = $metadata;
$this->sequence = $sequence;
}
/**
* Returns position of token in input string.
* @param int token number
* @return array [offset, line, column]
*/
public function getOffset($i)
{
$tokens = Strings::split($this->input, $this->re, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
$offset = isset($tokens[$i]) ? $tokens[$i][1] : strlen($this->input);
return array($offset, $offset ? substr_count($this->input, "\n", 0, $offset) + 1 : 1, $offset - strrpos(substr($this->input, 0, $offset), "\n"));
}