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/**
* MvcCore
*
* This source file is subject to the BSD 3 License
* For the full copyright and license information, please view
* the LICENSE.md file that are distributed with this source code.
*
* @copyright Copyright (c) 2016 Tom Flídr (https://github.com/mvccore/mvccore)
* @license https://mvccore.github.io/docs/mvccore/4.0.0/LICENCE.md
*/
namespace MvcCore\Ext\Router;
class Lang extends \MvcCore\Router {
/**
* MvcCore Extension - Router Lang - version:
* Comparation by PHP function version_compare();
* @see http://php.net/manual/en/function.version-compare.php
*/
const VERSION = '4.2.0';
/**
* Key name for language in second argument $params in $router->Url(); method,
* to tell $router->Url() method to generate different language url.
*/
const LANG_URL_PARAM = 'lang';
/**
* Special $_GET param name for session strict mode, how to change site language version.
*/
const LANG_SWITCH_URL_PARAM = 'switch_lang';
/**
* Route preg_match pattern in classic PHP form:
* array('en' => "#^/url\-begin/([^/]*)/([^/]*)/(.*)#", 'de' => "#^/url\-beginn/([^/]*)/([^/]*)/(.*)#",);
* @var string|array
*/
public $Pattern = '';
/**
* Route reverse address form from preg_replace pattern
* in form: array('en' => "/url-begin/{%first}/{%second}/{%third}", 'de' => "/url-beginn/{%first}/{%second}/{%third}",);
* @var string|array
*/
public $Reverse = '';
/**
* Default language, two lowercase characters, internaltional language code,
* lang to use in cases, when is not possible to detect lang from url,
* not possible to detect lang from 'Accept-Language' http header
* or not possible to get from session.
* @var string
*/
public $DefaultLang = 'en';
/**
* Result language, two lowercase characters, internaltional language code.
* Example: 'en' | 'fr' | 'de'...
* @var string
*/
public $Lang = '';
/**
* Session expiration seconds for remembering detected lang version by user agent.
* Session record is always used to compare if user is requesting different media
* site version then he has in session - if there is difference - user is redirected
* to session media site version and this seconds is time to remember that sessio record
* for described redirection.
* @var int
*/
public $SessionExpirationSeconds = 3600; // hour
/**
* Session record is always used to compare if user is requesting different lang
* version then he has in session - if there is difference - user is redirected
* to session lang version.
* @var \MvcCore\Session|\stdClass
*/
protected $session = NULL;
/**
* Lang founded in session.
* @var string
*/
protected $sessionLang = '';
/**
* Lang founded in request.
* @var string
*/
protected $requestLang = '';
/**
* Lang value in special $_GET param if session mode is strict.
* @var string
*/
protected $switchUriParamLang = '';
/**
* If any, lang value in request, in url, not allowed to work with.
* @var string
*/
protected $requestLangNotAllowed = '';
/**
* If true, process lang version strictly by session stored version,
* so if request contains some version and in session is different, redirect
* user to session version value adress, only when lang switching param
* is contained in $_GET, switch the version in session.
* If false, process lang version more benevolently, so if request
* contains some lang and in session is different, store in session lang
* version from request and do not redirect user.
* @var bool
*/
protected $stricModeBySession = FALSE;
/**
* If TRUE and language is necessary to request into default language url version,
* there is target url path completed into '/'+$this->DefaultLang, not to '/' (slash) only.
* If FALSE and language is necessary to request into default language url version,
* there is target url path completed only to '/' (slash).
* If not configured, FALSE by default.
* @var bool
*/
protected $keepDefaultLangPath = FALSE;
/**
* If TRUE, redirect request to default language version if lang in request is not allowed.
* If not configured, TRUE by default.
* @var boo
*/
protected $allowNonLocalizedRoutes = TRUE;
/**
* If TRUE, redirect request to default language version if lang in request is not allowed.
* If not configured, TRUE by default.
* @var bool
*/
protected $firstRequestStrictlyByUserAgent = FALSE;
/**
* Allowed language codes to use in your application, default lang will be allowed automaticly.
* @var array
*/
protected $allowedLangs = array();
/**
* Set international lowercase language code(s), allowed to use in your application.
* Default language is always allowed.
* @var string $lang..., international lowercase language code(s)
* @return \MvcCore\Ext\Router\Lang
*/
public function SetAllowedLangs () {
$this->allowedLangs = array();
call_user_func_array(array($this, 'AddAllowedLangs'), func_get_args());
return $this;
}
/**
* Add international lowercase language code(s), allowed to use in your application.
* Default language is always allowed.
* @var string $lang..., international lowercase language code(s)
* @return \MvcCore\Ext\Router\Lang
*/
public function AddAllowedLangs () {
$args = func_get_args();
if (count($args) === 1 && gettype($args[0]) == 'array') {
$langs = $args[0];
} else {
$langs = $args;
}
$this->allowedLangs = array_merge($this->allowedLangs, $langs);
return $this;
}
/**
* Set default lang to use in cases, when is not possible to detect
* lang from url, not possible to detect lang from 'Accept-Language' http header
* or not possible to get from session.
* @param string $defaultLang
* @return \MvcCore\Ext\Router\Lang
*/
public function SetDefaultLang ($defaultLang) {
$this->DefaultLang = $defaultLang;
return $this;
}
/**
* Set language externaly, not recomanded.
* @param string $lang
* @return \MvcCore\Ext\Router\Lang
*/
public function SetLang ($lang) {
$this->Lang = $lang;
return $this;
}
/**
* Session expiration in seconds, by default - one hour.
* @param int $sessionExpirationSeconds
* @return \MvcCore\Ext\Router\Lang
*/
public function SetSessionExpirationSeconds ($sessionExpirationSeconds = 3600) {
$this->SessionExpirationSeconds = $sessionExpirationSeconds;
return $this;
}
/**
* If TRUE, language is not possible to switch by different request url path begin,
* because for every different url path begin than session record is user automaticly
* redirected to url path begin by session. If TRUE, language version is possible to
* change only by special $_GET param called 'switch_lang=..' in query string.
* If not configured, FALSE by default.
* @param bool $stricModeBySession
* @return \MvcCore\Ext\Router\Lang
*/
public function SetStricModeBySession ($stricModeBySession = TRUE) {
$this->stricModeBySession = $stricModeBySession;
return $this;
}
/**
* If TRUE and language is necessary to request into default language url version,
* there is target url path completed into '/'+$this->DefaultLang, not to '/' (slash) only.
* If FALSE and language is necessary to request into default language url version,
* there is target url path completed only to '/' (slash).
* If not configured, FALSE by default.
* @param mixed $keepDefaultLangPath
* @return \MvcCore\Ext\Router\Lang
*/
public function SetKeepDefaultLangPath ($keepDefaultLangPath = TRUE) {
$this->keepDefaultLangPath = $keepDefaultLangPath;
return $this;
}
/**
* If TRUE, first request language will be strictly recognized by user agent
* http header 'Acept-Language', not by requested url. First or not first request
* is detected by session. If not configured, FALSE by default.
* @param bool $firstRequestStrictlyByUserAgent
* @return \MvcCore\Ext\Router\Lang
*/
public function SetFirstRequestStrictlyByUserAgent ($firstRequestStrictlyByUserAgent = TRUE) {
$this->firstRequestStrictlyByUserAgent = $firstRequestStrictlyByUserAgent;
return $this;
}
/**
* If TRUE, redirect request to default language version if lang in request is not allowed.
* If not configured, TRUE by default.
* @param bool $redirectToDefaultLangIfNotAllowed
* @return \MvcCore\Ext\Router\Lang
*/
public function SetAllowNonLocalizedRoutes ($allowNonLocalizedRoutes = TRUE) {
$this->allowNonLocalizedRoutes = $allowNonLocalizedRoutes;
return $this;
}
/**
* Append or prepend new request route.
* Route definition array shoud be array with route
* configuration definition, stdClass with route configuration
* definition or \MvcCore\Route instance. In configuration definition is
* required route name, controller, action, pattern and if pattern contains
* regexp groups, its necessary also to define route reverse.
* Route name should be defined as 'Controller:Action' string or any custom
* route name, but then there is necessary to specify controller name and
* action name inside route array/stdClass configuration or route instance.
* @param array|\stdClass|\MvcCore\Route $routeCfgOrRoute
* @param bool $prepend
* @return \MvcCore\Router
*/
public function AddRoute ($routeCfgOrRoute, $prepend = FALSE) {
if ($routeCfgOrRoute instanceof \MvcCore\Route) {
$instance = & $routeCfgOrRoute;
} else if (isset($routeCfgOrRoute['pattern']) && gettype($routeCfgOrRoute['pattern']) == 'array') {
$instance = \MvcCore\Ext\Router\Lang\Route::GetInstance($routeCfgOrRoute);
} else {
$instance = \MvcCore\Route::GetInstance($routeCfgOrRoute);
}
if ($prepend) {
$this->routes = array_merge(array($instance->Name => $instance), $this->routes);
} else {
$this->routes[$instance->Name] = & $instance;
}
$this->urlRoutes[$instance->Name] = & $instance;
$this->urlRoutes[$instance->Controller . ':' . $instance->Action] = & $instance;
return $this;
}
/**
* Complete current route and request params by defined routes
* @return void
*/
protected function routeByRewriteRoutes () {
$requestPath = $this->request->Path;
foreach ($this->routes as & $route) {
$routePattern = $this->getRouteLocalizedRecord($route, 'Pattern');
preg_match_all($routePattern, $requestPath, $patternMatches);
if (count($patternMatches) > 0 && count($patternMatches[0]) > 0) {
$this->currentRoute = $route;
$controllerName = isset($route->Controller)? $route->Controller: '';
$routeParams = array(
'controller' => \MvcCore\Tool::GetDashedFromPascalCase(str_replace(array('_', '\\'), '/', $controllerName)),
'action' => \MvcCore\Tool::GetDashedFromPascalCase(isset($route->Action) ? $route->Action : ''),
);
$routeReverse = $this->getRouteLocalizedRecord($route, 'Reverse');
preg_match_all("#{%([a-zA-Z0-9]*)}#", $routeReverse, $reverseMatches);
if (isset($reverseMatches[1]) && $reverseMatches[1]) {
$reverseMatchesNames = $reverseMatches[1];
array_shift($patternMatches);
foreach ($reverseMatchesNames as $key => $reverseKey) {
if (isset($patternMatches[$key]) && count($patternMatches[$key])) {
// 1 line bellow is only for route debug panel, only for cases when you
// forget to define current rewrite param, this defines null value by default
if (!isset($route->Params[$reverseKey])) $route->Params[$reverseKey] = NULL;
$routeParams[$reverseKey] = $patternMatches[$key][0];
} else {
break;
}
}
}
$routeDefaultParams = isset($route->Params) ? $route->Params : array();
$this->request->Params = array_merge($routeDefaultParams, $routeParams, $this->request->Params);
break;
}
}
}
/**
* Get route non-localized or localized record - 'Pattern' and 'Reverse'
* @param \MvcCore\Route $route
* @param string $routeRecordKey
* @return string
*/
protected function getRouteLocalizedRecord (\MvcCore\Route & $route, $routeRecordKey = '') {
if ($route instanceof \MvcCore\Ext\Router\Lang\Route && gettype($route->$routeRecordKey) == 'array') {
$routeRecordKey = $route->$routeRecordKey;
if (isset($routeRecordKey[$this->Lang])) {
return $routeRecordKey[$this->Lang];
} else if (isset($routeRecordKey[$this->DefaultLang])) {
return $routeRecordKey[$this->DefaultLang];
}
return reset($routeRecordKey);
}
return $route->$routeRecordKey;
}
/**
* Static initialization - called when class is included by autoloader
* @return void
*/
public static function StaticInit () {
\MvcCore::AddPreRouteHandler(function (\MvcCore\Request & $request, \MvcCore\Response & $response) {
\MvcCore::SessionStart();
static::GetInstance()->processLangVersion($request);
});
}
/**
* Complete url by route instance reverse info
* @param string $controllerActionOrRouteName
* @param array $params
* @return string
*/
protected function urlByRoute ($controllerActionOrRouteName, $params) {
$route = $this->urlRoutes[$controllerActionOrRouteName];
$allParams = array_merge(
is_array($route->Params) ? $route->Params : array(), $params
);
$lang = '';
if (isset($allParams[static::LANG_URL_PARAM])) {
$lang = $allParams[static::LANG_URL_PARAM];
unset($allParams[static::LANG_URL_PARAM]);
}
if (gettype($route->Reverse) == 'array') {
if (isset($route->Reverse[$lang])) {
$result = $route->Reverse[$lang];
} else if (isset($route->Reverse[$this->DefaultLang])) {
$result = $route->Reverse[$this->DefaultLang];
} else {
$result = reset($route->Reverse);
}
} else {
$result = $route->Reverse;
}
$result = rtrim($result, '?&');
foreach ($allParams as $key => $value) {
$paramKeyReplacement = "{%$key}";
if (mb_strpos($result, $paramKeyReplacement) === FALSE) {
$glue = (mb_strpos($result, '?') === FALSE) ? '?' : '&';
$result .= $glue . http_build_query(array($key => $value));
} else {
$result = str_replace($paramKeyReplacement, $value, $result);
}
}
if ($lang) {
$result = '/' . $lang . $result;
} else if (gettype($route->Pattern) == 'array') {
$result = '/' . $this->DefaultLang . $result;
}
if (!$this->keepDefaultLangPath) {
$resultPath = $result;
$questionMarkPos = mb_strpos($resultPath, '?');
$anyQueryString = $questionMarkPos !== FALSE;
if ($anyQueryString) $resultPath = mb_substr($resultPath, 0, $questionMarkPos);
if (trim($resultPath, '/') == $this->DefaultLang) {
$result = '/' . ($anyQueryString ? mb_substr($result, $questionMarkPos) : '');
}
}
return $this->request->BasePath . $result;
}
/**
* Detect language version by configured rules,
* set up detected version to current context,
* into request and into session and redirect if necessary.
* @param \MvcCore\Request $request
* @return void
*/
protected function processLangVersion (\MvcCore\Request & $request) {
$this->prepareProcessing($request);
if ($this->stricModeBySession) {
if ($this->sessionLang) {
if ($this->switchUriParamLang) {
$this->setUpDetectedLangAndRedirectIfNecessary($this->switchUriParamLang);
} else {
$this->setUpDetectedLangAndRedirectIfNecessary($this->sessionLang);
}
} else {
if ($this->firstRequestStrictlyByUserAgent) {
$userAgentLang = $this->getDetectedLangByUserAgent();
if ($userAgentLang) {
$this->setUpDetectedLangAndRedirectIfNecessary($userAgentLang);
} else {
$this->setUpDetectedLangAndRedirectIfNecessary($this->DefaultLang);
}
} else {
$this->setUpDetectedLangAndRedirectIfNecessary($this->requestLang);
}
}
} else {
if ($this->sessionLang) {
if ($this->requestLangNotAllowed) $this->requestLang = $this->sessionLang;
$this->setUpDetectedLangAndRedirectIfNecessary($this->requestLang);
} else {
if ($this->firstRequestStrictlyByUserAgent) {
$userAgentLang = $this->getDetectedLangByUserAgent();
if ($userAgentLang) {
$this->setUpDetectedLangAndRedirectIfNecessary($userAgentLang);
} else {
$this->setUpDetectedLangAndRedirectIfNecessary($this->requestLang);
}
} else {
$this->setUpDetectedLangAndRedirectIfNecessary($this->requestLang);
}
}
}
}
/**
* Store detected language in session, in request and in router.
* If detected is different than request version - redirect to detected version.
* Else if original request version is different than request version
* and boolean switch $this->allowNonLocalizedRoutes is true, redirect to default lang.
* @param string $detectedLang
*/
protected function setUpDetectedLangAndRedirectIfNecessary ($detectedLang) {
$this->Lang = $detectedLang;
$this->session->{static::LANG_URL_PARAM} = $detectedLang;
$this->request->Lang = $detectedLang;
if ($detectedLang !== $this->requestLang) {
$this->redirectToDifferentLangVersion($detectedLang);
} else if ($this->requestLangNotAllowed && $this->requestLangNotAllowed !== $this->requestLang) {
if (!$this->allowNonLocalizedRoutes) {
$this->redirectToDifferentLangVersion($this->DefaultLang);
}
} else if (!$this->keepDefaultLangPath && rtrim($this->request->OriginalPath, '/') == '/' . $this->DefaultLang) {
$this->redirectToDifferentLangVersion($this->DefaultLang);
}
}
/**
* Prepare language processing:
* - store request object reference
* - store request path into request original path
* - try to complete switching param from $_GET
* - try to complete request lang
* - try to complete session lang
* @var void
*/
protected function prepareProcessing (\MvcCore\Request & $request) {
$this->request = & $request;
// store original path value for later use
$this->request->OriginalPath = $this->request->Path;
// add default lang, change values into keys
$this->setUpAllowedLangs();
// look into request params if are we just switching any new lang version
if (isset($_GET[static::LANG_SWITCH_URL_PARAM])) {
$switchUriParamLang = strtolower($_GET[static::LANG_SWITCH_URL_PARAM]);
if (isset($this->allowedLangs[$switchUriParamLang])) {
$this->switchUriParamLang = $switchUriParamLang;
}
}
// get current lang version from url string
$this->setUpRequestLangFromUrl();
// set up session object to look inside for something from previous requests
static::setUpSession();
// look into session object if there are or not
// any record about lang from previous request
if (isset($this->session->{static::LANG_URL_PARAM})) {
$this->sessionLang = $this->session->{static::LANG_URL_PARAM};
}
}
/**
* Redirect to different language path version,
* only by changing first path element to different value.
* If router is configured to use default lang root path, keep it.
* @param string $targetLang
* @return void
*/
protected function redirectToDifferentLangVersion ($targetLang) {
$targetPath = '/' . $targetLang . $this->request->Path;
if (rtrim($targetPath, '/') == '/' . $this->DefaultLang) {
if (!$this->keepDefaultLangPath) {
$targetPath = '/';
}
}
if (isset($_GET[static::LANG_SWITCH_URL_PARAM])) {
unset($_GET[static::LANG_SWITCH_URL_PARAM]);
$query = count($_GET) > 0 ? '?' . http_build_query($_GET) : '';
} else {
$query = ($this->request->Query ? '?' . $this->request->Query : '');
}
$newUrl = $this->request->DomainUrl
. $this->request->BasePath
. $targetPath . $query;
\MvcCore\Controller::Redirect($newUrl);
}
/**
* Try to set up lang from request, if there is any lang, correct request path,
* if thre is no request language, set up default lang.
* @return void
*/
protected function setUpRequestLangFromUrl () {
$requestPath = $this->request->Path;
/**
* $path = '/' => $secondSlashPos = FALSE => $firstPathElm = ''
* $path = '/en' => $secondSlashPos = FALSE => $firstPathElm = 'en'
* $path = '/en/' => $secondSlashPos = 3 => $firstPathElm = 'en'
* $path = '/en/anything...'=> $secondSlashPos = 3 => $firstPathElm = 'en'
* $path = '/baaad' => $secondSlashPos = FALSE => $firstPathElm = 'baaad'
* $path = '/baaad/' => $secondSlashPos = 3 => $firstPathElm = 'baaad'
* $path = '/baaad/any...' => $secondSlashPos = 3 => $firstPathElm = 'baaad'
*/
$secondSlashPos = mb_strpos($requestPath, '/', 1);
if ($secondSlashPos === FALSE) {
$firstPathElm = $requestPath !== '/' ? mb_substr($requestPath, 1) : '';
} else {
$firstPathElm = mb_substr($requestPath, 1, $secondSlashPos - 1);
}
$rawLang = preg_replace("#[^a-z]#", '', strtolower($firstPathElm));
if (isset($this->allowedLangs[$rawLang])) {
$this->requestLang = $rawLang;
$this->request->Path = $secondSlashPos === FALSE ? '/' : mb_substr($this->request->Path, $secondSlashPos);
} else {
$this->requestLang = $this->DefaultLang;
if (mb_strlen($firstPathElm) > 0) {
$this->requestLangNotAllowed = $firstPathElm;
if (!$this->allowNonLocalizedRoutes) {
$this->request->Path = $secondSlashPos === FALSE ? '/' : mb_substr($this->request->Path, $secondSlashPos);
}
}
}
}
/**
* Add default language into allowed languages
* and change all array values into keys, set all values as 1 (int).
* @return void
*/
protected function setUpAllowedLangs () {
$allowedLangs = array();
foreach ($this->allowedLangs as $lang) {
$allowedLangs[$lang] = 1;
}
$allowedLangs[$this->DefaultLang] = 1;
$this->allowedLangs = $allowedLangs;
}
/**
* If session namespace by this class is not initialized,
* init namespace and move expiration (to next hour by default)
* @return void
*/
protected function setUpSession () {
if (is_null($this->session)) {
$this->session = \MvcCore\Session::GetNamespace(__CLASS__);
$this->session->SetExpirationSeconds($this->SessionExpirationSeconds);
}
}
/**
* Try to detect language from http header: 'Accept-Language'
* @var string
*/
protected function getDetectedLangByUserAgent () {
$result = '';
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$acceptLangs = $this->parseUserAgentLangList($_SERVER['HTTP_ACCEPT_LANGUAGE']);
foreach ($acceptLangs as $acceptLangsItem) {
$break = FALSE;
foreach ($acceptLangsItem as $acceptLangRec) {
$acceptLang = substr($acceptLangRec, 0, 2);
if (isset($this->allowedLangs[$acceptLang])) {
$result = $acceptLang;
$break = TRUE;
break;
}
}
if ($break) break;
}
}
return $result;
}
/**
* Parse list of comma separated language tags and sort it by the quality value
* @param string $languagesList
* @return array
*/
protected function parseUserAgentLangList($languagesList) {
$languages = array();
$languageRanges = explode(',', trim($languagesList));
foreach ($languageRanges as $languageRange) {
$regExpResult = preg_match(
"/(\*|[a-zA-Z0-9]{1,8}(?:-[a-zA-Z0-9]{1,8})*)(?:\s*;\s*q\s*=\s*(0(?:\.\d{0,3})|1(?:\.0{0,3})))?/",
trim($languageRange),
$match
);
if ($regExpResult) {
if (!isset($match[2])) {
$match[2] = '1.0';
} else {
$match[2] = (string) floatval($match[2]);
}
if (!isset($languages[$match[2]])) {
$languages[$match[2]] = array();
}
$languages[$match[2]][] = strtolower($match[1]);
}
}
krsort($languages);
return $languages;
}
}
Lang::StaticInit();