/**
* Compiles the route and returns an instance of CompiledRoute.
*
* @param Route $route Route to compile.
*
* @return CompiledRoute
*/
public static function compile(Route $route)
{
$staticPrefix = false;
$variables = [];
$pos = 0;
$extractedRegexes = [];
$defaults = [];
// set correct static prefix
$prefix = $route->getHost() == '' ? '' : $route->getHost() . '/';
// route regex
$routePatternObject = self::str($route->getPath())->trimLeft('/');
// if path is empty
// e.g. the path is empty if you are matching a start page
if ($routePatternObject->val() == '') {
return new CompiledRoute(false, false, [], [], false);
}
$routePattern = $prefix . $routePatternObject->val() . '$';
// we append the regex to match the string from beginning only if the path starts with http or '/'
if ($routePatternObject->startsWith('http')) {
$routePattern = '^' . $routePattern;
} else {
if (self::str($route->getRealPath())->startsWith('/') && self::str($route->getRealPath())->length() > 1) {
$routePattern = '^/' . $routePattern;
}
}
// set regex delimiters
$routePattern = '#' . $routePattern . '#';
// extract all variables
preg_match_all('#\\{\\w+\\}#', $route->getPath(), $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER);
foreach ($matches as $m) {
$var = substr($m[0][0], 1, -1);
// get all the text before the variable
if (!$staticPrefix) {
$prefix = substr($route->getPath(), $pos, $m[0][1] - $pos);
$pos = $m[0][1] + strlen($m[0][0]);
$precedingChar = strlen($prefix) > 0 ? substr($prefix, -1) : '';
if (strlen($precedingChar) === 1 && strpos(self::SEPARATORS, $precedingChar) !== false) {
$staticPrefix .= substr($prefix, 0, -1);
} else {
$staticPrefix .= $prefix;
}
}
$regex = '[\\w-]+';
$default = false;
if ($route->hasOption($var)) {
// pattern
if ($route->getOptions()[$var]->hasAttribute('Pattern')) {
$regex = $route->getOptions()[$var]->getAttribute('Pattern');
}
// default
if ($route->getOptions()[$var]->hasAttribute('Default')) {
$default = $route->getOptions()[$var]->getAttribute('Default');
}
}
$extractedRegexes[$var] = $regex;
$defaults['{' . $var . '}'] = $default;
$variables[] = ['name' => $var];
$routePattern = str_replace($m[0][0], '(' . $regex . ')', $routePattern);
}
// build the default route
$defaultRoute = false;
if (count($defaults) > 0) {
$defaultRoute = str_replace(array_keys($defaults), array_values($defaults), $route->getPath());
}
return new CompiledRoute($staticPrefix, $routePattern, $variables, $extractedRegexes, $defaultRoute);
}
