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<?php
namespace Coast;
class Router implements \Coast\App\Access, \Coast\App\Executable
{
const METHOD_ALL = 'ALL';
const METHOD_GET = \Coast\Request::METHOD_GET;
const METHOD_POST = \Coast\Request::METHOD_POST;
const METHOD_PUT = \Coast\Request::METHOD_PUT;
const METHOD_DELETE = \Coast\Request::METHOD_DELETE;
const TYPE_STATIC = 'static';
const TYPE_REGEX = 'regex';
use \Coast\App\Access\Implementation;
use \Coast\App\Executable\Implementation;
protected $_prefix;
protected $_suffix;
protected $_params = [];
protected $_target;
protected $_routes = [];
protected $_aliases = [];
public function __construct(array $options = array())
{
foreach ($options as $name => $value) {
if ($name[0] == '_') {
throw new \Coast\Exception("Access to '{$name}' is prohibited");
}
$this->$name($value);
}
}
public function prefix($prefix = null)
{
if (func_num_args() > 0) {
$this->_prefix = $prefix;
return $this;
}
return $this->_prefix;
}
public function suffix($suffix = null)
{
if (func_num_args() > 0) {
$this->_suffix = $suffix;
return $this;
}
return $this->_suffix;
}
public function params(array $params = null)
{
if (func_num_args() > 0) {
$this->_params = $params;
return $this;
}
return $this->_params;
}
public function target(\Coast\Router\Routable $target = null)
{
if (func_num_args() > 0) {
$this->_target = $target;
return $this;
}
return $this->_target;
}
public function routes(array $routes = array())
{
if (func_num_args() > 0) {
foreach ($routes as $name => $route) {
call_user_func_array([$this, 'route'], array_merge([$name], $route));
}
return $this;
}
return $this->_routes;
}
public function route($name, $methods = null, $path = null, $params = null, \Closure $target = null)
{
if (func_num_args() > 1) {
if (!is_array($methods)) {
$methods = array_map('trim', explode(',', $methods));
}
foreach ($methods as $i => $method) {
$method = strtoupper($method);
if ($method == self::METHOD_ALL) {
$methods = [
self::METHOD_GET,
self::METHOD_POST,
self::METHOD_PUT,
self::METHOD_DELETE,
];
break;
}
$methods[$i] = $method;
}
if ($params instanceof \Closure) {
$target = $params;
$params = [];
} if (!isset($params)) {
$params = [];
}
if (isset($target)) {
$target = $target->bindTo($this);
}
$path = ltrim($path, '/');
if (isset($this->_prefix)) {
$path = "{$this->_prefix}/{$path}";
}
if (isset($this->_suffix)) {
$path = "{$path}/{$this->_suffix}";
}
if (strpos($path, '{') !== false) {
$parts = explode('/', $path);
$names = [];
$stack = [];
foreach ($parts as $i => $part) {
if (preg_match('/^\{([a-zA-Z0-9_-]+)(?::(.*))?\}(\?)?$/', $part, $match)) {
$match = \Coast\array_merge_smart(
array('', '', '', ''),
$match
);
$names[] = $match[1];
$regex = strlen($match[2])
? "({$match[2]})"
: "([^\/]+)";
if ($match[3] == '?') {
$regex = $i == 0
? "(?:{$regex})?"
: "(?:\/{$regex})?";
} else {
$regex = $i == 0
? "{$regex}"
: "\/{$regex}";
}
} else {
$regex = $i == 0
? preg_quote($part, '/')
: "\/" . preg_quote($part, '/');
}
$stack[] = $regex;
}
$type = self::TYPE_REGEX;
$value = '/^' . implode($stack) . '$/';
} else {
$names = [];
$type = self::TYPE_STATIC;
$value = $path;
}
$route = [
'methods' => $methods,
'path' => $path,
'type' => $type,
'value' => $value,
'names' => $names,
'params' => $params,
'target' => $target,
];
$this->_routes[$name] = $route;
return $this;
}
if (isset($this->_aliases[$name])) {
$name = $this->_aliases[$name];
}
return isset($this->_routes[$name])
? $this->_routes[$name]
: null;
}
public function alias($name, $value = null)
{
if (func_num_args() > 1) {
if (isset($value)) {
$this->_aliases[$name] = $value;
} else {
unset($this->_aliases[$name]);
}
return $this;
}
return isset($this->_aliases[$name])
? $this->_aliases[$name]
: null;
}
public function aliases(array $aliases = null)
{
if (func_num_args() > 0) {
foreach ($aliases as $name => $value) {
$this->alias($name, $value);
}
return $this;
}
return $this->_aliases;
}
public function match($method, $path)
{
$method = strtoupper($method);
end($this->_routes);
do {
$name = key($this->_routes);
$route = current($this->_routes);
if (!in_array($method, $route['methods'])) {
continue;
}
if ($route['type'] == self::TYPE_STATIC) {
if ($path != $route['value']) {
continue;
}
$match = [];
} else if ($route['type'] == self::TYPE_REGEX) {
if (!preg_match($route['value'], $path, $match)) {
continue;
}
array_shift($match);
}
$params = array_merge(
$route['params'],
count($match) > 0
? array_combine(array_slice($route['names'], 0, count($match)), $match)
: []
);
return array_merge($route, [
'name' => $name,
'params' => $params,
]);
} while (prev($this->_routes));
throw new Router\Failure("Not route matched method '{$method}' and path '{$path}'");
}
public function reverse($name, array $params = array())
{
if (isset($this->_aliases[$name])) {
$name = $this->_aliases[$name];
}
if (!isset($this->_routes[$name])) {
throw new Router\Exception("Route '{$name}' does not exist");
}
$route = $this->_routes[$name];
$defaults = $route['params'] + $this->_params;
$parts = explode('/', $route['path']);
$path = [];
$trim = [];
foreach ($parts as $i => $part) {
if (preg_match('/^\{([a-zA-Z0-9_-]+)(?::(.*))?\}(\?)?$/', $part, $match)) {
$match = \Coast\array_merge_smart(
array('', '', '', ''),
$match
);
if (isset($params[$match[1]])) {
$value = $params[$match[1]];
} else if (isset($defaults[$match[1]])) {
$value = $defaults[$match[1]];
$trim[] = $i;
} else {
$value = null;
$trim[] = $i;
}
} else {
$value = $part;
}
$path[$i] = $value;
}
for ($i = count($path) - 1; $i >= 0; $i--) {
if (in_array($i, $trim)) {
unset($path[$i]);
} else {
break;
}
}
return implode('/', $path);
}
public function reverseData($name, array $params = array())
{
if (isset($this->_aliases[$name])) {
$name = $this->_aliases[$name];
}
if (!isset($this->_routes[$name])) {
throw new Router\Exception("Route '{$name}' does not exist");
}
$route = $this->_routes[$name];
$defaults = $route['params'] + $this->_params;
return [
'name' => $name,
'params' => $params + $defaults,
];
}
public function execute(\Coast\Request $req, \Coast\Response $res)
{
try {
$route = $this->match($req->method(), $req->path());
} catch (Router\Failure $e) {
return;
}
$req->param('route', $route);
$req->pathParams($route['params']);
if (isset($route['target'])) {
return $route['target']($req, $res, $route);
} else if (isset($this->_target)) {
return $this->_target->route($req, $res, $route);
} else {
throw new Router\Exception("There's nothing to route '{$route['name']}' to");
}
}
}