Viewing file:  RegexBasedAbstract.php (5.07 KB) -rw-r--r--
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<?php
namespace FastRoute\DataGenerator;
use FastRoute\BadRouteException;
use FastRoute\DataGenerator;
use FastRoute\Route;
abstract class RegexBasedAbstract implements DataGenerator
{
/** @var mixed[][] */
protected $staticRoutes = [];
/** @var Route[][] */
protected $methodToRegexToRoutesMap = [];
/**
* @return int
*/
abstract protected function getApproxChunkSize();
/**
* @return mixed[]
*/
abstract protected function processChunk($regexToRoutesMap);
public function addRoute($httpMethod, $routeData, $handler)
{
if ($this->isStaticRoute($routeData)) {
$this->addStaticRoute($httpMethod, $routeData, $handler);
} else {
$this->addVariableRoute($httpMethod, $routeData, $handler);
}
}
/**
* @return mixed[]
*/
public function getData()
{
if (empty($this->methodToRegexToRoutesMap)) {
return [$this->staticRoutes, []];
}
return [$this->staticRoutes, $this->generateVariableRouteData()];
}
/**
* @return mixed[]
*/
private function generateVariableRouteData()
{
$data = [];
foreach ($this->methodToRegexToRoutesMap as $method => $regexToRoutesMap) {
$chunkSize = $this->computeChunkSize(count($regexToRoutesMap));
$chunks = array_chunk($regexToRoutesMap, $chunkSize, true);
$data[$method] = array_map([$this, 'processChunk'], $chunks);
}
return $data;
}
/**
* @param int
* @return int
*/
private function computeChunkSize($count)
{
$numParts = max(1, round($count / $this->getApproxChunkSize()));
return (int) ceil($count / $numParts);
}
/**
* @param mixed[]
* @return bool
*/
private function isStaticRoute($routeData)
{
return count($routeData) === 1 && is_string($routeData[0]);
}
private function addStaticRoute($httpMethod, $routeData, $handler)
{
$routeStr = $routeData[0];
if (isset($this->staticRoutes[$httpMethod][$routeStr])) {
throw new BadRouteException(sprintf(
'Cannot register two routes matching "%s" for method "%s"',
$routeStr, $httpMethod
));
}
if (isset($this->methodToRegexToRoutesMap[$httpMethod])) {
foreach ($this->methodToRegexToRoutesMap[$httpMethod] as $route) {
if ($route->matches($routeStr)) {
throw new BadRouteException(sprintf(
'Static route "%s" is shadowed by previously defined variable route "%s" for method "%s"',
$routeStr, $route->regex, $httpMethod
));
}
}
}
$this->staticRoutes[$httpMethod][$routeStr] = $handler;
}
private function addVariableRoute($httpMethod, $routeData, $handler)
{
list($regex, $variables) = $this->buildRegexForRoute($routeData);
if (isset($this->methodToRegexToRoutesMap[$httpMethod][$regex])) {
throw new BadRouteException(sprintf(
'Cannot register two routes matching "%s" for method "%s"',
$regex, $httpMethod
));
}
$this->methodToRegexToRoutesMap[$httpMethod][$regex] = new Route(
$httpMethod, $handler, $regex, $variables
);
}
/**
* @param mixed[]
* @return mixed[]
*/
private function buildRegexForRoute($routeData)
{
$regex = '';
$variables = [];
foreach ($routeData as $part) {
if (is_string($part)) {
$regex .= preg_quote($part, '~');
continue;
}
list($varName, $regexPart) = $part;
if (isset($variables[$varName])) {
throw new BadRouteException(sprintf(
'Cannot use the same placeholder "%s" twice', $varName
));
}
if ($this->regexHasCapturingGroups($regexPart)) {
throw new BadRouteException(sprintf(
'Regex "%s" for parameter "%s" contains a capturing group',
$regexPart, $varName
));
}
$variables[$varName] = $varName;
$regex .= '(' . $regexPart . ')';
}
return [$regex, $variables];
}
/**
* @param string
* @return bool
*/
private function regexHasCapturingGroups($regex)
{
if (false === strpos($regex, '(')) {
// Needs to have at least a ( to contain a capturing group
return false;
}
// Semi-accurate detection for capturing groups
return (bool) preg_match(
'~
(?:
\(\?\(
| \[ [^\]\\\\]* (?: \\\\ . [^\]\\\\]* )* \]
| \\\\ .
) (*SKIP)(*FAIL) |
\(
(?!
\? (?! <(?![!=]) | P< | \' )
| \*
)
~x',
$regex
);
}
}
|