370 lines
12 KiB
PHP
370 lines
12 KiB
PHP
|
<?php
|
||
|
/**
|
||
|
* Class: Route
|
||
|
* Handles the routing process and other route-related tasks.
|
||
|
*/
|
||
|
class Route {
|
||
|
# String: $action
|
||
|
# The current action.
|
||
|
public $action = "";
|
||
|
|
||
|
# String: $request
|
||
|
# The extracted request.
|
||
|
public $request = "";
|
||
|
|
||
|
# Array: $arg
|
||
|
# Clean URLs decomposed into an array of arguments.
|
||
|
public $arg = array();
|
||
|
|
||
|
# Array: $try
|
||
|
# An array of actions to try until one doesn't return false.
|
||
|
public $try = array();
|
||
|
|
||
|
# Boolean: $ajax
|
||
|
# Shortcut to the AJAX constant (useful for Twig).
|
||
|
public $ajax = AJAX;
|
||
|
|
||
|
# Boolean: $success
|
||
|
# Did <Route.init> call a successful route?
|
||
|
public $success = false;
|
||
|
|
||
|
# Variable: $controller
|
||
|
# The Route's Controller.
|
||
|
public $controller;
|
||
|
|
||
|
/**
|
||
|
* Function: __construct
|
||
|
* Parse the URL and give the controller an opportunity to determine the action.
|
||
|
*
|
||
|
* Parameters:
|
||
|
* $controller - The controller to use.
|
||
|
*/
|
||
|
private function __construct($controller) {
|
||
|
if (!in_array("Controller", class_implements($controller)))
|
||
|
trigger_error(
|
||
|
__("Route was initiated with an invalid Controller."),
|
||
|
E_USER_ERROR
|
||
|
);
|
||
|
|
||
|
$config = Config::current();
|
||
|
|
||
|
fallback($controller->feed, isset($_GET['feed']));
|
||
|
|
||
|
# Set the contoller for this route.
|
||
|
$this->controller = $controller;
|
||
|
|
||
|
# Determining the action can be this simple if clean URLs are disabled.
|
||
|
$this->action =& $_GET['action'];
|
||
|
|
||
|
$base = ($controller->base == "") ?
|
||
|
$config->url :
|
||
|
$config->chyrp_url."/".$controller->base ;
|
||
|
|
||
|
$regex = "~^".preg_quote(
|
||
|
oneof(parse_url($base, PHP_URL_PATH), ""),
|
||
|
"~"
|
||
|
)."((/)index.php)?~";
|
||
|
|
||
|
# Extract the request.
|
||
|
$this->request = preg_replace($regex, '$2', $_SERVER['REQUEST_URI']);
|
||
|
|
||
|
# Decompose clean URLs.
|
||
|
$this->arg = array_map(
|
||
|
"urldecode",
|
||
|
explode("/", trim($this->request, "/"))
|
||
|
);
|
||
|
|
||
|
# Give the controller an opportunity to parse this route
|
||
|
# and determine the action.
|
||
|
$controller->parse($this);
|
||
|
|
||
|
Trigger::current()->call("parse_route", $this);
|
||
|
|
||
|
# Support single parameter actions without custom routes
|
||
|
# or parsing by the controller.
|
||
|
if (empty($this->action)) {
|
||
|
if (
|
||
|
!empty($this->arg[0]) and
|
||
|
!preg_match("/[\W]/", $this->arg[0])
|
||
|
)
|
||
|
$this->try[] = $this->arg[0];
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: init
|
||
|
* Attempt to call a responder until one of them doesn't return false.
|
||
|
*/
|
||
|
public function init(): bool {
|
||
|
$trigger = Trigger::current();
|
||
|
$visitor = Visitor::current();
|
||
|
|
||
|
$trigger->call("route_init", $this);
|
||
|
|
||
|
if (isset($this->action))
|
||
|
array_unshift($this->try, $this->action);
|
||
|
|
||
|
foreach ($this->try as $key => $val) {
|
||
|
list($method, $args) = is_numeric($key) ?
|
||
|
array($val, array()) :
|
||
|
array($key, $val) ;
|
||
|
|
||
|
$this->action = $method;
|
||
|
|
||
|
# Don't try to call anything except a valid PHP function.
|
||
|
if (preg_match("/[\W]/", $this->action))
|
||
|
error(
|
||
|
__("Error"),
|
||
|
__("Invalid action."),
|
||
|
code:400
|
||
|
);
|
||
|
|
||
|
# Return 403 if the visitor cannot view the site
|
||
|
# and this is not an exempt action.
|
||
|
if (
|
||
|
!$visitor->group->can("view_site") and
|
||
|
!$this->controller->exempt($this->action)
|
||
|
) {
|
||
|
$trigger->call("can_not_view_site");
|
||
|
show_403(
|
||
|
__("Access Denied"),
|
||
|
__("You are not allowed to view this site.")
|
||
|
);
|
||
|
}
|
||
|
|
||
|
$name = strtolower(
|
||
|
str_replace(
|
||
|
"Controller",
|
||
|
"",
|
||
|
get_class($this->controller)
|
||
|
)
|
||
|
);
|
||
|
|
||
|
# This discovers responders provided by extensions.
|
||
|
if (
|
||
|
$trigger->exists($name."_".$method) or
|
||
|
$trigger->exists("route_".$method)
|
||
|
) {
|
||
|
$call = $trigger->call(
|
||
|
array($name."_".$method, "route_".$method),
|
||
|
$this->controller
|
||
|
);
|
||
|
} else {
|
||
|
$call = false;
|
||
|
}
|
||
|
|
||
|
if ($call !== false) {
|
||
|
$this->success = true;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
# This discovers responders native to the controller.
|
||
|
if (method_exists($this->controller, $name."_".$method)) {
|
||
|
$response = call_user_func_array(
|
||
|
array($this->controller, $name."_".$method),
|
||
|
$args
|
||
|
);
|
||
|
} else {
|
||
|
$response = false;
|
||
|
}
|
||
|
|
||
|
if ($response !== false) {
|
||
|
$this->success = true;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
# Return 404 if routing failed and nothing was displayed.
|
||
|
if (!$this->success and !$this->controller->displayed)
|
||
|
show_404();
|
||
|
|
||
|
# Set redirect_to for actions that visitors
|
||
|
# might want to return to after they log in.
|
||
|
if (
|
||
|
$this->controller->displayed and
|
||
|
!$this->controller->feed and
|
||
|
!$this->controller->exempt($this->action) and
|
||
|
empty($_POST)
|
||
|
) {
|
||
|
$_SESSION['redirect_to'] = self_url();
|
||
|
}
|
||
|
|
||
|
$trigger->call("route_done", $this);
|
||
|
|
||
|
return $this->success;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: url
|
||
|
* Constructs an absolute URL from a relative one. Converts clean URLs to dirty.
|
||
|
*
|
||
|
* Parameters:
|
||
|
* $url - The relative URL. Assumed to be dirty if it begins with "/".
|
||
|
* $controller - The controller to use. Current controller used if omitted.
|
||
|
*
|
||
|
* Returns:
|
||
|
* An absolute clean or dirty URL, depending on value of @Config->clean_urls@
|
||
|
* and @controller->clean_urls@.
|
||
|
*/
|
||
|
public static function url($url, $controller = null): string {
|
||
|
$config = Config::current();
|
||
|
|
||
|
if (!isset($controller))
|
||
|
$controller = Route::current()->controller;
|
||
|
|
||
|
if (is_string($controller))
|
||
|
$controller = $controller::current();
|
||
|
|
||
|
$base = ($controller->base == "") ?
|
||
|
$config->url :
|
||
|
$config->chyrp_url."/".$controller->base ;
|
||
|
|
||
|
# Assume this is a dirty URL and return it without translation.
|
||
|
if (strpos($url, "/") === 0)
|
||
|
return fix($base.$url, true);
|
||
|
|
||
|
# Assume this is a clean URL and ensure it ends with a slash.
|
||
|
$url = rtrim($url, "/")."/";
|
||
|
|
||
|
# Translation is unnecessary if clean URLs are enabled
|
||
|
# and the controller supports them.
|
||
|
if ($config->clean_urls and $controller->clean_urls)
|
||
|
return fix($base."/".$url, true);
|
||
|
|
||
|
$urls = $controller->urls;
|
||
|
|
||
|
Trigger::current()->filter($urls, "parse_urls");
|
||
|
|
||
|
# Generate a feed variant of all dirty translations
|
||
|
# not native to the controller.
|
||
|
foreach (
|
||
|
array_diff_assoc($urls, $controller->urls) as $key => $value
|
||
|
) {
|
||
|
$delimiter = substr($key, 0, 1);
|
||
|
$index = substr($key, 0, -1).
|
||
|
preg_quote("feed/", $delimiter).
|
||
|
$delimiter;
|
||
|
|
||
|
$urls[$index] = $value."&feed";
|
||
|
}
|
||
|
|
||
|
# Add a fallback for single parameter translations.
|
||
|
$urls['|/([^/]+)/$|'] = '/?action=$1';
|
||
|
|
||
|
# Do the translation.
|
||
|
$translation = preg_replace(
|
||
|
array_keys($urls),
|
||
|
array_values($urls),
|
||
|
"/".$url,
|
||
|
1
|
||
|
);
|
||
|
|
||
|
return fix($base.$translation, true);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: add
|
||
|
* Adds a route to the blog.
|
||
|
*
|
||
|
* Parameters:
|
||
|
* $path - The path to add. Wrap variables with () e.g. "tag/(name)/".
|
||
|
* $action - The action. Add parameters with ; e.g "tag;foo=bar;baz=boo".
|
||
|
*
|
||
|
* Notes:
|
||
|
* Required for actions that have more than one parameter.
|
||
|
* For example, not needed for /tags/ but needed for /tag/(name)/.
|
||
|
*
|
||
|
* See Also:
|
||
|
* <remove>
|
||
|
*/
|
||
|
public function add($path, $action): void {
|
||
|
$config = Config::current();
|
||
|
$new_routes = $config->routes;
|
||
|
$new_routes[$path] = $action;
|
||
|
$config->set("routes", $new_routes);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: remove
|
||
|
* Removes a route added by <add>.
|
||
|
*
|
||
|
* Parameters:
|
||
|
* $path - The path to remove.
|
||
|
*
|
||
|
* See Also:
|
||
|
* <add>
|
||
|
*/
|
||
|
public function remove($path): void {
|
||
|
$config = Config::current();
|
||
|
$new_routes = $config->routes;
|
||
|
unset($new_routes[$path]);
|
||
|
$config->set("routes", $new_routes);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: custom
|
||
|
* Parses custom routes stored in the configuration.
|
||
|
*
|
||
|
* Notes:
|
||
|
* The / path strictly requires no request args.
|
||
|
*/
|
||
|
public function custom(): void {
|
||
|
if (!$this->controller instanceof MainController)
|
||
|
return;
|
||
|
|
||
|
$config = Config::current();
|
||
|
|
||
|
foreach ($config->routes as $path => $action) {
|
||
|
preg_match_all("/\(([^\)]+)\)/", $path, $variables);
|
||
|
|
||
|
$exp = ($path == "/") ?
|
||
|
"\$" :
|
||
|
preg_replace(
|
||
|
"/\\\\\(([^\)]+)\\\\\)/",
|
||
|
"([^\/]+)",
|
||
|
preg_quote(oneof(trim($path, "/"), "/"), "/")
|
||
|
) ;
|
||
|
|
||
|
# Expression matches?
|
||
|
if (preg_match("/^\/{$exp}/", $this->request, $args)) {
|
||
|
array_shift($args);
|
||
|
|
||
|
# Populate $_GET variables discovered in the path.
|
||
|
if (isset($variables[1])) {
|
||
|
foreach ($variables[1] as $index => $variable)
|
||
|
$_GET[$variable] = urldecode($args[$index]);
|
||
|
}
|
||
|
|
||
|
# Populate $_GET variables contained in the action.
|
||
|
$params = explode(";", $action);
|
||
|
$action = $params[0];
|
||
|
|
||
|
array_shift($params);
|
||
|
|
||
|
foreach ($params as $param) {
|
||
|
$split = explode("=", $param);
|
||
|
fallback($split[1], "");
|
||
|
$_GET[$split[0]] = urldecode($split[1]);
|
||
|
}
|
||
|
|
||
|
# Set the action.
|
||
|
$this->action = $action;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Function: current
|
||
|
* Returns a singleton reference to the current class.
|
||
|
*/
|
||
|
public static function & current($controller = null): ?self {
|
||
|
static $instance = null;
|
||
|
|
||
|
if (!isset($controller) and empty($instance))
|
||
|
return $instance;
|
||
|
|
||
|
$instance = (empty($instance)) ? new self($controller) : $instance ;
|
||
|
return $instance;
|
||
|
}
|
||
|
}
|