/**
* Dispatches a URI for internal processing.
* Usually called by a front controller.
* @method dispatch
* @static
* @param {mixed} [$uri=null] You can pass a custom URI to dispatch. Otherwise, Qbix will attempt
* to route the requested URL, if any.
* @param {array} [$check=array('accessible')] Pass array() to skip checking whether the URI can be obtained
* as a result of routing some URL.
* @return {boolean}
* @throws {Q_Exception_MethodNotSupported}
* @throws {Q_Exception_Recursion}
* @throws {Q_Exception_DispatcherErrors}
* @throws {Q_Exception_DispatcherForward}
*/
static function dispatch($uri = null, $check = array('accessible'))
{
if (!is_array($check)) {
$check = array('accessible');
}
if (isset($uri)) {
if (in_array('accessible', $check)) {
if (!Q_Uri::url($uri)) {
// We shouldn't dispatch to this URI
$uri = Q_Uri::from(array());
}
}
self::$uri = Q_Uri::from($uri);
} else {
$request_uri = Q_Request::uri();
self::$uri = clone $request_uri;
}
// if file or dir is requested, try to serve it
$served = false;
$skip = Q_Config::get('Q', 'dispatcherSkipFilename', false);
$filename = $skip ? false : Q_Request::filename();
if ($filename) {
if (is_dir($filename)) {
/**
* @event Q/dir
* @param {string} filename
* @param {string} routed_uri
* @return {boolean}
*/
$served = Q::event("Q/dir", compact('filename', 'routed_uri'));
$dir_was_served = true;
} else {
/**
* @event Q/file
* @param {string} filename
* @param {string} routed_uri
* @return {boolean}
*/
$served = Q::event("Q/file", compact('filename', 'routed_uri'));
$dir_was_served = false;
}
}
// if response was served, then return
if ($served) {
self::result($dir_was_served ? "Dir served" : "File served");
return true;
}
// This loop is for forwarding
$max_forwards = Q_Config::get('Q', 'maxForwards', 10);
for ($try = 0; $try < $max_forwards; ++$try) {
// Make an array from the routed URI
$routed_uri_array = array();
if (self::$uri instanceof Q_Uri) {
$routed_uri_array = self::$uri->toArray();
}
// If no module was found, then respond with noModule and return
if (!isset(self::$uri->module)) {
/**
* @event Q/noModule
* @param {array} $routed_uri_array
*/
Q::event("Q/noModule", $routed_uri_array);
// should echo things
self::result("No module");
return false;
}
$module = self::$uri->module;
try {
// Implement restricting of modules we are allowed to access
$routed_modules = Q_Config::get('Q', 'routedModules', null);
if (isset($routed_modules)) {
if (!in_array($module, $routed_modules)) {
/**
* @event Q/notFound
* @param {array} $routed_uri_array
*/
Q::event('Q/notFound', $routed_uri_array);
// should echo things
self::result("Unknown module");
return false;
}
} else {
if (!Q::realPath("handlers/{$module}")) {
Q::event('Q/notFound', $routed_uri_array);
// should echo things
self::result("Unknown module");
return false;
}
}
// Implement notFound if action was not found
if (empty(self::$uri->action)) {
Q::event('Q/notFound', $routed_uri_array);
// should echo things
self::result("Unknown action");
return false;
}
// Fire a pure event, for aggregation etc
if (!isset(self::$skip['Q/prepare'])) {
/**
* @event Q/prepare
* @param {array} $routed_uri_array
*/
Q::event('Q/prepare', $routed_uri_array, true);
}
// Perform validation
if (!isset(self::$skip['Q/validate'])) {
/**
* @event Q/validate
* @param {array} $routed_uri_array
*/
Q::event('Q/validate', $routed_uri_array);
if (!isset(self::$skip['Q/errors'])) {
// Check if any errors accumulated
if (Q_Response::getErrors()) {
// There were validation errors -- render a response
self::result('Validation errors');
self::errors(null, $module, null);
return false;
}
}
}
// Time to instantiate some app objects from the request
if (!isset(self::$skip['Q/objects'])) {
/**
* @event Q/objects
* @param {array} $routed_uri_array
*/
Q::event('Q/objects', $routed_uri_array, true);
}
// We might want to reroute the request
if (!isset(self::$skip['Q/reroute'])) {
/**
* @event Q/reroute
* @param {array} $routed_uri_array
* @return {boolean} whether to stop the dispatch
*/
$stop_dispatch = Q::event('Q/reroute', $routed_uri_array, true);
if ($stop_dispatch) {
self::result("Stopped dispatch");
return false;
}
}
// Make some changes to server state, possibly
$method = Q_Request::method();
if ($method != 'GET') {
$methods = Q_Config::get('Q', 'methods', array('POST', 'PUT', 'DELETE', 'OPTIONS', 'HEAD'));
if (!in_array($method, $methods)) {
throw new Q_Exception_MethodNotSupported(compact('method'));
}
$method_event = 'Q/' . strtolower($method);
if (!isset(self::$skip['Q/method']) and !isset(self::$skip[$method_event])) {
if (!Q::canHandle($method_event)) {
throw new Q_Exception_MethodNotSupported(compact('method'));
}
Q::event($method_event);
}
}
// You can calculate some analytics here, and store them somewhere
if (!isset(self::$skip['Q/analytics'])) {
/**
* @event Q/analytics
* @param {array} $routed_uri_array
*/
Q::event('Q/analytics', $routed_uri_array, true);
}
if (!isset(self::$skip['Q/errors'])) {
// Check if any errors accumulated
if (Q_Response::getErrors()) {
// There were processing errors -- render a response
self::result('Processing errors');
self::errors(null, $module, null);
return false;
}
}
// When handling all further events, you should probably
// refrain from changing server state, and only do reading.
// That is because GET in HTTP is not supposed to have side effects
// for which the client is responsible.
// Start buffering the response, unless otherwise requested
$handler = Q_Response::isBuffered();
if ($handler !== false) {
$ob = new Q_OutputBuffer($handler);
}
// Generate and render a response
/**
* @event Q/response
* @param {array} $routed_uri_array
*/
self::$response_started = true;
Q::event("Q/response", $routed_uri_array);
if (!empty($ob)) {
$ob->endFlush();
}
self::result("Served response");
return true;
} catch (Q_Exception_DispatcherForward $e) {
if (!empty($ob)) {
$ob->getClean();
}
self::handleForwardException($e);
} catch (Q_Exception_DispatcherErrors $e) {
if (!empty($ob)) {
$partial_response = $ob->getClean();
} else {
$partial_response = null;
}
self::errors(null, $module, $partial_response);
self::result("Rendered errors");
return true;
} catch (Exception $exception) {
if (!empty($ob)) {
$partial_response = $ob->getClean();
} else {
$partial_response = null;
}
$message = $exception->getMessage();
$file = $exception->getFile();
$line = $exception->getLine();
if (is_callable(array($exception, 'getTraceAsStringEx'))) {
$trace_string = $exception->getTraceAsStringEx();
} else {
$trace_string = $exception->getTraceAsString();
}
$colored = Q_Exception::coloredString($message, $file, $line, $trace_string);
self::result("Exception occurred:\n\n{$colored}");
try {
self::errors($exception, $module, $partial_response);
} catch (Exception $e) {
if (!empty($forwarding_to_error_action)) {
// Looks like there were errors in the error action
// So show the default one with the original exception
throw $exception;
}
if (get_class($e) === 'Q_Exception_DispatcherForward') {
$forwarding_to_error_action = true;
self::handleForwardException($e);
continue;
} else {
throw $e;
}
}
return false;
}
}
// If we are here, we have done forwarding too much
throw new Q_Exception_Recursion(array('function_name' => 'Dispatcher::forward()'));
}
/**
* Dumps the result as a table in text mode
* @method __toString
*/
function __toString()
{
try {
$ob = new Q_OutputBuffer();
$results = array();
foreach ($this->fields as $key => $value) {
$results[] = array('Field name:' => $key, 'Field value:' => $value, 'Field modified:' => $this->wasModified($key) ? 'Yes' : 'No');
}
Db_Utils::dump_table($results);
return $ob->getClean();
} catch (Exception $e) {
return $e->getMessage();
}
}
/**
* Renders a particular view
* @method view
* @static
* @param {string} $viewName
* The full name of the view
* @param {array} $params=array()
* Parameters to pass to the view
* @return {string}
* The rendered content of the view
* @throws {Q_Exception_MissingFile}
*/
static function view($viewName, $params = array())
{
require_once Q_CLASSES_DIR . DS . 'Q' . DS . 'Exception' . DS . 'MissingFile.php';
if (empty($params)) {
$params = array();
}
$viewName = implode(DS, explode('/', $viewName));
$fields = Q_Config::get('Q', 'views', 'fields', null);
if ($fields) {
$params = array_merge($fields, $params);
}
/**
* @event {before} Q/view
* @param {string} viewName
* @param {string} params
* @return {string}
* Optional. If set, override method return
*/
$result = self::event('Q/view', compact('viewName', 'params'), 'before');
if (isset($result)) {
return $result;
}
try {
$ob = new Q_OutputBuffer();
self::includeFile('views' . DS . $viewName, $params);
return $ob->getClean();
} catch (Q_Exception_MissingFile $e) {
if (basename($e->params['filename']) != basename($viewName)) {
throw $e;
}
$ob->flushHigherBuffers();
/**
* Renders 'Missing View' page
* @event Q/missingView
* @param {string} viewName
* @return {string}
*/
return self::event('Q/missingView', compact('viewName'));
}
}
/**
* Returns a <style> tag with the content of all the stylesheets included inline
* @method stylesheetsInline
* @static
* @param {array} [$styles=array()] If not empty, this associative array contains styles which will be
* included at the end of the generated <style> tag.
* @param {string} [$slotName=null] If provided, returns only the stylesheets added while filling this slot.
* @return {string} the style tags and their contents inline
*/
static function stylesheetsInline($styles = array(), $slotName = null)
{
if (empty(self::$stylesheets)) {
return '';
}
$sheets = self::stylesheetsArray($slotName, false);
$sheets_for_slots = array();
if (!empty($sheets)) {
foreach ($sheets as $stylesheet) {
$href = '';
$media = 'screen, print';
$type = 'text/css';
extract($stylesheet, EXTR_IF_EXISTS);
$ob = new Q_OutputBuffer();
if (Q_Valid::url($href)) {
try {
include $href;
} catch (Exception $e) {
}
} else {
list($href, $filename) = Q_Html::themedUrlAndFilename($href);
try {
Q::includeFile($filename);
} catch (Exception $e) {
}
}
$sheets_for_slots[$stylesheet['slot']][] = "\n/* Included inline from {$href} */\n" . $ob->getClean();
}
}
$parts = array();
foreach ($sheets_for_slots as $slot => $texts) {
$parts[] = Q_Html::tag('style', array('data-slot' => $slot), implode("\n\n", $texts));
}
return implode("", $parts);
}
/**
* The default implementation.
*/
function Q_errors($params)
{
extract($params);
/**
* @var Exception $exception
* @var boolean $startedResponse
*/
if (!empty($exception)) {
Q_Response::addError($exception);
}
$errors = Q_Response::getErrors();
$errors_array = Q_Exception::toArray($errors);
// Simply return the errors, if this was an AJAX request
if ($is_ajax = Q_Request::isAjax()) {
try {
$errors_json = @Q::json_encode($errors_array);
} catch (Exception $e) {
$errors_array = array_slice($errors_array, 0, 1);
unset($errors_array[0]['trace']);
$errors_json = @Q::json_encode($errors_array);
}
$json = "{\"errors\": {$errors_json}}";
$callback = Q_Request::callback();
switch (strtolower($is_ajax)) {
case 'iframe':
if (!Q_Response::$batch) {
header("Content-type: text/html");
}
echo <<<EOT
<!doctype html><html lang=en>
<head><meta charset=utf-8><title>Q Result</title></head>
<body>
<script type="text/javascript">
window.result = function () { return {$json} };
</script>
</body>
</html>
EOT;
break;
case 'json':
default:
header("Content-type: " . ($callback ? "application/javascript" : "application/json"));
echo $callback ? "{$callback}({$json})" : $json;
}
return;
}
// Forward internally, if it was requested
if ($onErrors = Q_Request::special('onErrors', null)) {
$uri1 = Q_Dispatcher::uri();
$uri2 = Q_Uri::from($onErrors);
$url2 = $uri2->toUrl();
if (!isset($uri2)) {
throw new Q_Exception_WrongValue(array('field' => 'onErrors', 'range' => 'an internal URI reachable from a URL'));
}
if ($uri1->toUrl() !== $url2) {
Q_Dispatcher::forward($uri2);
return;
// we don't really need this, but it's here anyway
}
}
$params2 = compact('errors', 'exception', 'errors_array', 'exception_array');
if (Q::eventStack('Q/response')) {
// Errors happened while rendering response. Just render errors view.
return Q::view('Q/errors.php', $params2);
}
if (!$startedResponse) {
try {
// Try rendering the response, expecting it to
// display the errors along with the rest.
$ob = new Q_OutputBuffer();
Q::event('Q/response', $params2);
$ob->endFlush();
return;
} catch (Exception $e) {
if (get_class($e) === 'Q_Exception_DispatcherForward') {
throw $e;
// if forwarding was requested, do it
// for all other errors, continue trying other things
}
$output = $ob->getClean();
}
}
if ($errors) {
// Try rendering the app's errors response, if any.
$app = Q::app();
if (Q::canHandle("{$app}/errors/response/content")) {
Q_Dispatcher::forward("{$app}/errors");
} else {
echo Q::view("Q/errors.php", compact('errors'));
}
}
if (!empty($e)) {
return Q::event('Q/exception', array('exception' => $e));
}
}
/**
* Returns a response to the client.
* @param {boolean} [$closeConnection=false] Whether to send headers to close the connection
* @method response
* @static
*/
static function response($closeConnection = false)
{
if (self::$servedResponse) {
return;
// response was served, and no new dispatch started
}
// Start buffering the response, unless otherwise requested
$handler = Q_Response::isBuffered();
if ($handler !== false) {
$ob = new Q_OutputBuffer($handler);
}
if (!empty($_GET['Q_ct'])) {
Q_Response::setCookie('Q_ct', $_GET['Q_ct']);
}
if (!empty($_GET['Q_cordova'])) {
Q_Response::setCookie('Q_cordova', $_GET['Q_cordova']);
}
Q_Response::sendCookieHeaders();
// Generate and render a response
/**
* Gives the app a chance to generate a response.
* You should not change the server state when handling this event.
* @event Q/response
* @param {array} $routed
*/
self::$startedResponse = true;
Q::event("Q/response", self::$routed);
if ($closeConnection) {
header("Connection: close");
header("Content-Length: " . $ob->getLength());
}
if (!empty($ob)) {
$ob->endFlush();
}
if ($closeConnection) {
ob_end_flush();
flush();
}
self::$servedResponse = true;
self::result("Served response");
return true;
}
/**
* Dumps the result as a table in text mode
* Side effect, though: can't fetch anymore until the cursor is closed.
* @method __toString
* @return {string}
*/
function __toString()
{
return "Db_Result";
try {
$ob = new Q_OutputBuffer();
$rows = $this->fetchAll(PDO::FETCH_ASSOC);
Db::dump_table($rows);
return $ob->getClean();
} catch (Exception $e) {
return $e->getMessage();
}
}
