Moded URL management methods from controller to Url helper, updated docs

docs/guide/url.md

@@ -51,20 +51,30 @@ examples may also output:
 * `http://www.example.com/blog/post/index/`
 * `http://www.example.com/index.php?r=blog/post/index`
 
-Inside a web application controller, you can use the controller's `createUrl` shortcut method. Unlike the global
-`createUrl` method, the controller version is context sensitive:
+In order to simplify URL creation there is [[yii\helpers\Url]] helper that is able to do the following:
 
 ```php
-echo $this->createUrl(''); // currently active route
-echo $this->createUrl(['view', 'id' => 'contact']); // same controller, different action
-echo $this->createUrl('post/index'); // same module, different controller and action
-echo $this->createUrl('/site/index'); // absolute route no matter what controller is making this call
-echo $this->createurl('hi-tech'); // url for the case sensitive action `actionHiTech` of the current controller
-echo $this->createurl(['/date-time/fast-forward', 'id' => 105]); // url for action the case sensitive controller, `DateTimeController::actionFastForward`
+use yii\helpers\Url;
+
+echo Url::to(''); // currently active URL
+
+echo Url::toRoute(['view', 'id' => 'contact']); // same controller, different action
+echo Url::toRoute('post/index'); // same module, different controller and action
+echo Url::toRoute('/site/index'); // absolute route no matter what controller is making this call
+echo Url::toRoute('hi-tech'); // url for the case sensitive action `actionHiTech` of the current controller
+echo Url::toRoute(['/date-time/fast-forward', 'id' => 105]); // url for action the case sensitive controller, `DateTimeController::actionFastForward`
+
+echo Url::to('@web'); // get URL from alias
+
+echo Url::canonical(); // get canonical URL for the curent page
+echo Url::home(); // get home URL
+
+Url::remember(); // save URL to be used later
+Url::previous(); // get previously saved URL
 ```
 
 > **Tip**: In order to generate URL with a hashtag, for example `/index.php?r=site/page&id=100#title`, you need to
-  specify the parameter named `#` using `$this->createUrl(['post/read', 'id' => 100, '#' => 'title'])`.
+  specify the parameter named `#` using `Url::to(['post/read', 'id' => 100, '#' => 'title'])`.
 
 Customizing URLs
 ----------------
@@ -114,21 +124,25 @@ Let's use some examples to explain how URL rules work. We assume that our rule s
 ]
 ```
 
-- Calling `$this->createUrl('post/list')` generates `/index.php/posts`. The first rule is applied.
-- Calling `$this->createUrl(['post/read', 'id' => 100])` generates `/index.php/post/100`. The second rule is applied.
-- Calling `$this->createUrl(['post/read', 'year' => 2008, 'title' => 'a sample post'])` generates
+- Calling `Url::toRoute('post/list')` generates `/index.php/posts`. The first rule is applied.
+- Calling `Url::toRoute(['post/read', 'id' => 100])` generates `/index.php/post/100`. The second rule is applied.
+- Calling `Url::toRoute(['post/read', 'year' => 2008, 'title' => 'a sample post'])` generates
   `/index.php/post/2008/a%20sample%20post`. The third rule is applied.
-- Calling `$this->createUrl('post/read')` generates `/index.php/post/read`. None of the rules is applied, convention is used
+- Calling `Url::toRoute('post/read')` generates `/index.php/post/read`. None of the rules is applied, convention is used
   instead.
 
 In summary, when using `createUrl` to generate a URL, the route and the `GET` parameters passed to the method are used to
 decide which URL rule to be applied. If every parameter associated with a rule can be found in the `GET` parameters passed
 to `createUrl`, and if the route of the rule also matches the route parameter, the rule will be used to generate the URL.
 
-If the `GET` parameters passed to `createUrl` are more than those required by a rule, the additional parameters will appear in the query string. For example, if we call `$this->createUrl('post/read', ['id' => 100, 'year' => 2008])`, we will obtain `/index.php/post/100?year=2008`.
+If the `GET` parameters passed to `Url::toRoute` are more than those required by a rule, the additional parameters will
+appear in the query string. For example, if we call `Url::toRoute(['post/read', 'id' => 100, 'year' => 2008])`, we will
+obtain `/index.php/post/100?year=2008`.
 
-As we mentioned earlier, the other purpose of URL rules is to parse the requesting URLs. Naturally, this is an inverse process of URL creation. For example, when a user requests for `/index.php/post/100`, the second rule in the above example will apply, which resolves in the route `post/read` and the `GET` parameter `['id' => 100]` (accessible via
-`Yii::$app->request->getQueryParam('id')`).
+As we mentioned earlier, the other purpose of URL rules is to parse the requesting URLs. Naturally, this is an inverse
+process of URL creation. For example, when a user requests for `/index.php/post/100`, the second rule in the above example
+will apply, which resolves in the route `post/read` and the `GET` parameter `['id' => 100]` (accessible via
+`Yii::$app->request->get('id')`).
 
 ### Parameterizing Routes
 

framework/CHANGELOG.md

@@ -191,7 +191,11 @@ Yii Framework 2 Change Log
 - Chg #2544: Changed `DetailView`'s `name:format:label` to `attribute:format:label` to match `GridView` (samdark)
 - Chg #2603: `yii\base\ErrorException` now extends `\ErrorException` (samdark)
 - Chg #2629: `Module::controllerPath` is now read only, and all controller classes must be namespaced under `Module::controllerNamespace`. (qiangxue)
-- Chg #2630: `yii\heplers\Html::url` removed (samdark)
+- Chg #2630: API changes for URLs generation (samdark, qiangxue, cebe)
+	- Added `yii\helpers\Url`.
+	- Removed `yii\heplers\Html::url`, use `yii\helpers\Url::to` instead.
+	- Removed `yii\web\Controller::createUrl` and `yii\web\Controller::createAbsoluteUrl`, use `yii\helpers::toRoute` instead.
+	- Removed `yii\web\Controller::getCanonicalUrl`, use `yii\helpers::canonical` instead.
 - Chg: Renamed `yii\jui\Widget::clientEventsMap` to `clientEventMap` (qiangxue)
 - Chg: Renamed `ActiveRecord::getPopulatedRelations()` to `getRelatedRecords()` (qiangxue)
 - Chg: Renamed `attributeName` and `className` to `targetAttribute` and `targetClass` for `UniqueValidator` and `ExistValidator` (qiangxue)
@@ -231,7 +235,6 @@ Yii Framework 2 Change Log
 - New #1956: Implemented test fixture framework (qiangxue)
 - New #2149: Added `yii\base\DynamicModel` to support ad-hoc data validation (qiangxue)
 - New #2360: Added `AttributeBehavior` and `BlameableBehavior`, and renamed `AutoTimestamp` to `TimestampBehavior` (lucianobaraglia, qiangxue)
-- New #2630: Added `yii\helpers\Url` (samdark)
 - New: Yii framework now comes with core messages in multiple languages
 - New: Added yii\codeception\DbTestCase (qiangxue)
 

framework/helpers/BaseUrl.php

@@ -26,6 +26,14 @@ class BaseUrl
 	 * @param array|string $route route as a string or route and parameters in form of
 	 * ['route', 'param1' => 'value1', 'param2' => 'value2'].
 	 *
+	 * If there is a controller running relative routes are recognized:
+	 *
+	 * - If the route is an empty string, the current [[route]] will be used;
+	 * - If the route contains no slashes at all, it is considered to be an action ID
+	 *   of the current controller and will be prepended with [[uniqueId]];
+	 * - If the route has no leading slash, it is considered to be a route relative
+	 *   to the current module and will be prepended with the module's uniqueId.
+	 *
 	 * In case there is no controller, [[\yii\web\UrlManager::createUrl()]] will be used.
 	 *
 	 * @param string $schema URI schema to use. If specified absolute URL with the schema specified is returned.
@@ -39,10 +47,36 @@ class BaseUrl
 			throw new InvalidParamException('$route should contain at least one element.');
 		}
 		if (Yii::$app->controller instanceof \yii\web\Controller) {
-			return $schema === null ? Yii::$app->controller->createUrl($route) : Yii::$app->controller->createAbsoluteUrl($route, $schema);
-		} else {
+			$route[0] = static::getNormalizedRoute($route[0]);
+		}
 		return $schema === null ? Yii::$app->getUrlManager()->createUrl($route) : Yii::$app->getUrlManager()->createAbsoluteUrl($route, $schema);
 	}
+
+	/**
+	 * Normalizes route making it suitable for UrlManager. Absolute routes are staying as is
+	 * while relative routes are converted to absolute routes.
+	 *
+	 * A relative route is a route without a leading slash, such as "view", "post/view".
+	 *
+	 * - If the route is an empty string, the current [[route]] will be used;
+	 * - If the route contains no slashes at all, it is considered to be an action ID
+	 *   of the current controller and will be prepended with [[uniqueId]];
+	 * - If the route has no leading slash, it is considered to be a route relative
+	 *   to the current module and will be prepended with the module's uniqueId.
+	 *
+	 * @param string $route the route. This can be either an absolute route or a relative route.
+	 * @return string normalized route suitable for UrlManager
+	 */
+	private static function getNormalizedRoute($route)
+	{
+		if (strpos($route, '/') === false) {
+			// empty or an action ID
+			$route = $route === '' ? Yii::$app->controller->getRoute() : Yii::$app->controller->getUniqueId() . '/' . $route;
+		} elseif ($route[0] !== '/') {
+			// relative to module
+			$route = ltrim(Yii::$app->controller->module->getUniqueId() . '/' . $route, '/');
+		}
+		return $route;
 	}
 
 	/**
@@ -108,7 +142,7 @@ class BaseUrl
 	 * @param string $url URL to remember. Default is current URL.
 	 * @param string $name Name to use to remember URL. Defaults to `yii\web\User::returnUrlParam`.
 	 */
-	public function remember($url = '', $name = null)
+	public static function remember($url = '', $name = null)
 	{
 		if ($url === '') {
 			$url = Yii::$app->getRequest()->getUrl();
@@ -127,7 +161,7 @@ class BaseUrl
 	 * @param string $name Name used to remember URL. Defaults to `yii\web\User::returnUrlParam`.
 	 * @return string URL
 	 */
-	public function previous($name = null)
+	public static function previous($name = null)
 	{
 		if ($name === null) {
 			return Yii::$app->getUser()->getReturnUrl();
@@ -137,13 +171,22 @@ class BaseUrl
 	}
 
 	/**
-	 * Returns canonical URL for the current page
+	 * Returns the canonical URL of the currently requested page.
+	 * The canonical URL is constructed using current controller's [[yii\web\Controller::route]] and
+	 * [[yii\web\Controller::actionParams]]. You may use the following code in the layout view to add a link tag
+	 * about canonical URL:
+	 *
+	 * ```php
+	 * $this->registerLinkTag(['rel' => 'canonical', 'href' => Url::canonical()]);
+	 * ```
 	 *
-	 * @return string canonical URL
+	 * @return string the canonical URL of the currently requested page
 	 */
-	public function canonical()
+	public static function canonical()
 	{
-		return Yii::$app->controller->getCanonicalUrl();
+		$params = Yii::$app->controller->actionParams;
+		$params[0] = Yii::$app->controller->getRoute();
+		return Yii::$app->getUrlManager()->createAbsoluteUrl($params);
 	}
 
 	/**
@@ -152,7 +195,7 @@ class BaseUrl
 	 * @param string $schema URI schema to use. If specified absolute URL with the schema specified is returned.
 	 * @return string home URL
 	 */
-	public function home($schema = null)
+	public static function home($schema = null)
 	{
 		if ($schema === null) {
 			return Yii::$app->getHomeUrl();

framework/web/Controller.php

@@ -28,7 +28,7 @@ class Controller extends \yii\base\Controller
 	 */
 	public $enableCsrfValidation = true;
 	/**
-	 * @var array the parameters bound to the current action. This is mainly used by [[getCanonicalUrl()]].
+	 * @var array the parameters bound to the current action.
 	 */
 	public $actionParams = [];
 
@@ -119,101 +119,6 @@ class Controller extends \yii\base\Controller
 	}
 
 	/**
-	 * Normalizes route making it suitable for UrlManager. Absolute routes are staying as is
-	 * while relative routes are converted to absolute routes.
-	 *
-	 * A relative route is a route without a leading slash, such as "view", "post/view".
-	 *
-	 * - If the route is an empty string, the current [[route]] will be used;
-	 * - If the route contains no slashes at all, it is considered to be an action ID
-	 *   of the current controller and will be prepended with [[uniqueId]];
-	 * - If the route has no leading slash, it is considered to be a route relative
-	 *   to the current module and will be prepended with the module's uniqueId.
-	 *
-	 * @param string $route the route. This can be either an absolute route or a relative route.
-	 * @return string normalized route suitable for UrlManager
-	 */
-	protected function getNormalizedRoute($route)
-	{
-		if (strpos($route, '/') === false) {
-			// empty or an action ID
-			$route = $route === '' ? $this->getRoute() : $this->getUniqueId() . '/' . $route;
-		} elseif ($route[0] !== '/') {
-			// relative to module
-			$route = ltrim($this->module->getUniqueId() . '/' . $route, '/');
-		}
-		return $route;
-	}
-
-	/**
-	 * Creates a relative URL using the given route and parameters.
-	 *
-	 * This method enhances [[UrlManager::createUrl()]] by supporting relative routes.
-	 * A relative route is a route without a leading slash, such as "view", "post/view".
-	 *
-	 * - If the route is an empty string, the current [[route]] will be used;
-	 * - If the route contains no slashes at all, it is considered to be an action ID
-	 *   of the current controller and will be prepended with [[uniqueId]];
-	 * - If the route has no leading slash, it is considered to be a route relative
-	 *   to the current module and will be prepended with the module's uniqueId.
-	 *
-	 * After this route conversion, the method calls [[UrlManager::createUrl()]] to create a URL.
-	 *
-	 * @param string|array $params route as a string or route and parameters in form of ['route', 'param1' => 'value1', 'param2' => 'value2']
-	 * @return string the created relative URL
-	 */
-	public function createUrl($params)
-	{
-		$params = (array)$params;
-		$params[0] = $this->getNormalizedRoute($params[0]);
-		return Yii::$app->getUrlManager()->createUrl($params);
-	}
-
-	/**
-	 * Creates an absolute URL using the given route and parameters.
-	 *
-	 * This method enhances [[UrlManager::createAbsoluteUrl()]] by supporting relative routes.
-	 * A relative route is a route without a leading slash, such as "view", "post/view".
-	 *
-	 * - If the route is an empty string, the current [[route]] will be used;
-	 * - If the route contains no slashes at all, it is considered to be an action ID
-	 *   of the current controller and will be prepended with [[uniqueId]];
-	 * - If the route has no leading slash, it is considered to be a route relative
-	 *   to the current module and will be prepended with the module's uniqueId.
-	 *
-	 * After this route conversion, the method calls [[UrlManager::createUrl()]] to create a URL.
-	 *
-	 * @param string|array $params route as a string or route and parameters in form of ['route', 'param1' => 'value1', 'param2' => 'value2']
-	 * @param string $schema the schema to use for the url. e.g. 'http' or 'https'. If not specified
-	 * the schema of the current request will be used.
-	 * @return string the created absolute URL
-	 */
-	public function createAbsoluteUrl($params, $schema = null)
-	{
-		$params = (array)$params;
-		$params[0] = $this->getNormalizedRoute($params[0]);
-		return Yii::$app->getUrlManager()->createAbsoluteUrl($params, $schema);
-	}
-
-	/**
-	 * Returns the canonical URL of the currently requested page.
-	 * The canonical URL is constructed using [[route]] and [[actionParams]]. You may use the following code
-	 * in the layout view to add a link tag about canonical URL:
-	 *
-	 * ~~~
-	 * $this->registerLinkTag(['rel' => 'canonical', 'href' => Yii::$app->controller->canonicalUrl]);
-	 * ~~~
-	 *
-	 * @return string the canonical URL of the currently requested page
-	 */
-	public function getCanonicalUrl()
-	{
-		$params = $this->actionParams;
-		$params[0] = $this->getRoute();
-		return Yii::$app->getUrlManager()->createAbsoluteUrl($params);
-	}
-
-	/**
 	 * Redirects the browser to the specified URL.
 	 * This method is a shortcut to [[Response::redirect()]].
 	 *