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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\Routing;
use ICanBoogie\HTTP\Request;
use ICanBoogie\Prototype\MethodNotDefined;
/**
* A route collection.
*
* @method RouteCollection any() any(string $pattern, $controller, array $options=[]) Add a route for any HTTP method.
* @method RouteCollection connect() connect(string $pattern, $controller, array $options=[]) Add a route for the HTTP method CONNECT.
* @method RouteCollection delete() delete(string $pattern, $controller, array $options=[]) Add a route for the HTTP method DELETE.
* @method RouteCollection get() get(string $pattern, $controller, array $options=[]) Add a route for the HTTP method GET.
* @method RouteCollection head() head(string $pattern, $controller, array $options=[]) Add a route for the HTTP method HEAD.
* @method RouteCollection options() options(string $pattern, $controller, array $options=[]) Add a route for the HTTP method OPTIONS.
* @method RouteCollection post() post(string $pattern, $controller, array $options=[]) Add a route for the HTTP method POST.
* @method RouteCollection put() put(string $pattern, $controller, array $options=[]) Add a route for the HTTP method PUT.
* @method RouteCollection patch() patch(string $pattern, $controller, array $options=[]) Add a route for the HTTP method PATCH
* @method RouteCollection trace() trace(string $pattern, $controller, array $options=[]) Add a route for the HTTP method TRACE.
*/
class RouteCollection implements \IteratorAggregate, \ArrayAccess, \Countable
{
/**
* Specify that the route definitions can be trusted.
*/
const TRUSTED_DEFINITIONS = true;
/**
* Class name of the {@link Route} instances.
*/
const DEFAULT_ROUTE_CLASS = Route::class;
/**
* Route definitions.
*
* @var array
*/
protected $routes = [];
/**
* Route instances.
*
* @var Route[]
*/
protected $instances = [];
/**
* @param array $definitions
* @param bool $trusted_definitions {@link TRUSTED_DEFINITIONS} if the definition can be
* trusted. This will speed up the construct process but the definitions will not be checked,
* nor will they be normalized.
*/
public function __construct(array $definitions = [], $trusted_definitions = false)
{
foreach ($definitions as $id => $definition)
{
if (is_string($id) && empty($definition[RouteDefinition::ID]))
{
$definition[RouteDefinition::ID] = $id;
}
$this->add($definition, $trusted_definitions);
}
}
/**
* Adds a route definition using an HTTP method.
*
* @param string $method
* @param array $arguments
*
* @return $this
*/
public function __call($method, array $arguments)
{
$method = strtoupper($method);
if ($method !== Request::METHOD_ANY && !in_array($method, Request::$methods))
{
throw new MethodNotDefined($method, $this);
}
list($pattern, $controller, $options) = $arguments + [ 2 => [] ];
$this->revoke_cache();
$this->add([
RouteDefinition::CONTROLLER => $controller,
RouteDefinition::PATTERN => $pattern
] + $options + [ RouteDefinition::VIA => $method ]);
return $this;
}
/**
* Adds a route definition.
*
* **Note:** The method does *not* revoke cache.
*
* @param array $definition
* @param bool $trusted_definition {@link TRUSTED_DEFINITIONS} if the method should be trusting the
* definition, in which case the method doesn't assert if the definition is valid, nor does
* it normalizes it.
*
* @return $this
*/
protected function add(array $definition, $trusted_definition = false)
{
if (!$trusted_definition)
{
RouteDefinition::assert_is_valid($definition);
RouteDefinition::normalize($definition);
RouteDefinition::ensure_has_id($definition);
}
$id = $definition[RouteDefinition::ID];
$this->routes[$id] = $definition;
return $this;
}
/**
* Adds resource routes.
*
* **Note:** The route definitions for the resource are created by
* {@link RouteMaker::resource}. Both methods accept the same arguments.
*
* @see \ICanBoogie\Routing\RoutesMaker::resource
*
* @param string $name
* @param string $controller
* @param array $options
*
* @return array
*/
public function resource($name, $controller, array $options = [])
{
$definitions = RouteMaker::resource($name, $controller, $options);
$this->revoke_cache();
foreach ($definitions as $id => $definition)
{
$this->add([ RouteDefinition::ID => $id ] + $definition);
}
}
public function getIterator()
{
return new \ArrayIterator($this->routes);
}
public function offsetExists($offset)
{
return isset($this->routes[$offset]);
}
/**
* Returns a {@link Route} instance.
*
* @param string $id Route identifier.
*
* @return Route
*
* @throws RouteNotDefined
*/
public function offsetGet($id)
{
if (isset($this->instances[$id]))
{
return $this->instances[$id];
}
if (!$this->offsetExists($id))
{
throw new RouteNotDefined($id);
}
return $this->instances[$id] = Route::from($this->routes[$id]);
}
/**
* Defines a route.
*
* @param string $id The identifier of the route.
* @param array $route The route definition.
*/
public function offsetSet($id, $route)
{
$this->revoke_cache();
$this->add([ RouteDefinition::ID => $id ] + $route);
}
/**
* Removes a route.
*
* @param string $offset The identifier of the route.
*/
public function offsetUnset($offset)
{
unset($this->routes[$offset]);
$this->revoke_cache();
}
/**
* Returns the number of routes in the collection.
*
* @return int
*/
public function count()
{
return count($this->routes);
}
/**
* Search for a route matching the specified pathname and method.
*
* @param string $uri The URI to match. If the URI includes a query string it is removed
* before searching for a matching route.
* @param array|null $captured The parameters captured from the URI. If the URI included a
* query string, its parsed params are stored under the `__query__` key.
* @param string $method One of HTTP\Request::METHOD_* methods.
*
* @return Route|false|null
*/
public function find($uri, &$captured = null, $method = Request::METHOD_ANY)
{
$captured = [];
$parsed = (array) parse_url($uri) + [ 'path' => null, 'query' => null ];
$path = $parsed['path'];
if (!$path)
{
return false;
}
#
# Determine if a route matches prerequisites.
#
$matchable = function($via) use($method) {
if ($method != Request::METHOD_ANY)
{
if (is_array($via))
{
if (!in_array($method, $via))
{
return false;
}
}
else if ($via !== Request::METHOD_ANY && $via !== $method)
{
return false;
}
}
return true;
};
#
# Search for a matching static route.
#
$map_static = function($definitions) use($path, &$matchable) {
foreach ($definitions as $id => $definition)
{
$pattern = $definition[RouteDefinition::PATTERN];
$via = $definition[RouteDefinition::VIA];
if (!$matchable($via) || $pattern != $path)
{
continue;
}
return $id;
}
return null;
};
#
# Search for a matching dynamic route.
#
$map_dynamic = function($definitions) use($path, &$matchable, &$captured) {
foreach ($definitions as $id => $definition)
{
$pattern = $definition[RouteDefinition::PATTERN];
$via = $definition[RouteDefinition::VIA];
if (!$matchable($via) || !Pattern::from($pattern)->match($path, $captured))
{
continue;
}
return $id;
}
return null;
};
list($static, $dynamic) = $this->sort_routes();
$id = null;
if ($static)
{
$id = $map_static($static);
}
if (!$id && $dynamic)
{
$id = $map_dynamic($dynamic);
}
if (!$id)
{
return null;
}
$query = $parsed['query'];
if ($query)
{
parse_str($query, $parsed_query_string);
$captured['__query__'] = $parsed_query_string;
}
return $this[$id];
}
private $static;
private $dynamic;
/**
* Revokes the cache used by the {@link sort_routes} method.
*/
private function revoke_cache()
{
$this->static = null;
$this->dynamic = null;
}
/**
* Sorts routes according to their type and computed weight.
*
* Routes and grouped in two groups: static routes and dynamic routes. The difference between
* static and dynamic routes is that dynamic routes capture parameters from the path and thus
* require a regex to compute the match, whereas static routes only require is simple string
* comparison.
*
* Dynamic routes are ordered according to their weight, which is computed from the number
* of static parts before the first capture. The more static parts, the lighter the route is.
*
* @return array An array with the static routes and dynamic routes.
*/
private function sort_routes()
{
if ($this->static !== null)
{
return [ $this->static, $this->dynamic ];
}
$static = [];
$dynamic = [];
$weights = [];
foreach ($this->routes as $id => $definition)
{
$pattern = $definition[RouteDefinition::PATTERN];
$first_capture_position = strpos($pattern, ':') ?: strpos($pattern, '<');
if ($first_capture_position === false)
{
$static[$id] = $definition;
}
else
{
$dynamic[$id] = $definition;
$weights[$id] = substr_count($pattern, '/', 0, $first_capture_position);
}
}
\ICanBoogie\stable_sort($dynamic, function($v, $k) use($weights) {
return -$weights[$k];
});
$this->static = $static;
$this->dynamic = $dynamic;
return [ $static, $dynamic ];
}
/**
* Returns a new collection with filtered routes.
*
* @param callable $filter
*
* @return RouteCollection
*/
public function filter(callable $filter)
{
$definitions = [];
foreach ($this as $id => $definition)
{
if (!$filter($definition, $id))
{
continue;
}
$definitions[$id] = $definition;
}
return new static($definitions);
}
}