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1 | <?php |
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2 | /** |
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3 | * @link http://www.yiiframework.com/ |
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4 | * @copyright Copyright (c) 2008 Yii Software LLC |
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5 | * @license http://www.yiiframework.com/license/ |
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6 | */ |
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7 | |||
8 | namespace yii\base; |
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9 | |||
10 | use Yii; |
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11 | |||
12 | /** |
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13 | * Controller is the base class for classes containing controller logic. |
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14 | * |
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15 | * For more details and usage information on Controller, see the [guide article on controllers](guide:structure-controllers). |
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16 | * |
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17 | * @property Module[] $modules All ancestor modules that this controller is located within. This property is |
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18 | * read-only. |
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19 | * @property string $route The route (module ID, controller ID and action ID) of the current request. This |
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20 | * property is read-only. |
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21 | * @property string $uniqueId The controller ID that is prefixed with the module ID (if any). This property is |
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22 | * read-only. |
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23 | * @property View|\yii\web\View $view The view object that can be used to render views or view files. |
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24 | * @property string $viewPath The directory containing the view files for this controller. |
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25 | * |
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26 | * @author Qiang Xue <[email protected]> |
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27 | * @since 2.0 |
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28 | */ |
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29 | class Controller extends Component implements ViewContextInterface |
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30 | { |
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31 | /** |
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32 | * @event ActionEvent an event raised right before executing a controller action. |
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33 | * You may set [[ActionEvent::isValid]] to be false to cancel the action execution. |
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34 | */ |
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35 | const EVENT_BEFORE_ACTION = 'beforeAction'; |
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36 | /** |
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37 | * @event ActionEvent an event raised right after executing a controller action. |
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38 | */ |
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39 | const EVENT_AFTER_ACTION = 'afterAction'; |
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40 | |||
41 | /** |
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42 | * @var string the ID of this controller. |
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43 | */ |
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44 | public $id; |
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45 | /** |
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46 | * @var Module the module that this controller belongs to. |
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47 | */ |
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48 | public $module; |
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49 | /** |
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50 | * @var string the ID of the action that is used when the action ID is not specified |
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51 | * in the request. Defaults to 'index'. |
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52 | */ |
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53 | public $defaultAction = 'index'; |
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54 | /** |
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55 | * @var null|string|false the name of the layout to be applied to this controller's views. |
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56 | * This property mainly affects the behavior of [[render()]]. |
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57 | * Defaults to null, meaning the actual layout value should inherit that from [[module]]'s layout value. |
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58 | * If false, no layout will be applied. |
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59 | */ |
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60 | public $layout; |
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61 | /** |
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62 | * @var Action the action that is currently being executed. This property will be set |
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63 | * by [[run()]] when it is called by [[Application]] to run an action. |
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64 | */ |
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65 | public $action; |
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66 | |||
67 | /** |
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68 | * @var View the view object that can be used to render views or view files. |
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69 | */ |
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70 | private $_view; |
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71 | /** |
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72 | * @var string the root directory that contains view files for this controller. |
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73 | */ |
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74 | private $_viewPath; |
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75 | |||
76 | |||
77 | /** |
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78 | * @param string $id the ID of this controller. |
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79 | * @param Module $module the module that this controller belongs to. |
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80 | * @param array $config name-value pairs that will be used to initialize the object properties. |
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81 | */ |
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82 | 248 | public function __construct($id, $module, $config = []) |
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83 | { |
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84 | 248 | $this->id = $id; |
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85 | 248 | $this->module = $module; |
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86 | 248 | parent::__construct($config); |
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87 | 248 | } |
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88 | |||
89 | /** |
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90 | * Declares external actions for the controller. |
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91 | * This method is meant to be overwritten to declare external actions for the controller. |
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92 | * It should return an array, with array keys being action IDs, and array values the corresponding |
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93 | * action class names or action configuration arrays. For example, |
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94 | * |
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95 | * ```php |
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96 | * return [ |
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97 | * 'action1' => 'app\components\Action1', |
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98 | * 'action2' => [ |
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99 | * 'class' => 'app\components\Action2', |
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100 | * 'property1' => 'value1', |
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101 | * 'property2' => 'value2', |
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102 | * ], |
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103 | * ]; |
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104 | * ``` |
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105 | * |
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106 | * [[\Yii::createObject()]] will be used later to create the requested action |
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107 | * using the configuration provided here. |
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108 | */ |
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109 | 130 | public function actions() |
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110 | { |
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111 | 130 | return []; |
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112 | } |
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113 | |||
114 | /** |
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115 | * Runs an action within this controller with the specified action ID and parameters. |
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116 | * If the action ID is empty, the method will use [[defaultAction]]. |
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117 | * @param string $id the ID of the action to be executed. |
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118 | * @param array $params the parameters (name-value pairs) to be passed to the action. |
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119 | * @return mixed the result of the action. |
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120 | * @throws InvalidRouteException if the requested action ID cannot be resolved into an action successfully. |
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121 | * @see createAction() |
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122 | */ |
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123 | 114 | public function runAction($id, $params = []) |
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124 | { |
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125 | 114 | $action = $this->createAction($id); |
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126 | 114 | if ($action === null) { |
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127 | throw new InvalidRouteException('Unable to resolve the request: ' . $this->getUniqueId() . '/' . $id); |
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128 | } |
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129 | |||
130 | 114 | Yii::trace('Route to run: ' . $action->getUniqueId(), __METHOD__); |
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131 | |||
132 | 114 | if (Yii::$app->requestedAction === null) { |
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133 | 114 | Yii::$app->requestedAction = $action; |
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134 | } |
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135 | |||
136 | 114 | $oldAction = $this->action; |
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137 | 114 | $this->action = $action; |
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138 | |||
139 | 114 | $modules = []; |
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140 | 114 | $runAction = true; |
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141 | |||
142 | // call beforeAction on modules |
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143 | 114 | foreach ($this->getModules() as $module) { |
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144 | 114 | if ($module->beforeAction($action)) { |
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145 | 114 | array_unshift($modules, $module); |
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146 | } else { |
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147 | $runAction = false; |
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148 | 114 | break; |
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149 | } |
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150 | } |
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151 | |||
152 | 114 | $result = null; |
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153 | |||
154 | 114 | if ($runAction && $this->beforeAction($action)) { |
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155 | // run the action |
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156 | 114 | $result = $action->runWithParams($params); |
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157 | |||
158 | 110 | $result = $this->afterAction($action, $result); |
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159 | |||
160 | // call afterAction on modules |
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161 | 110 | foreach ($modules as $module) { |
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162 | /* @var $module Module */ |
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163 | 110 | $result = $module->afterAction($action, $result); |
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164 | } |
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165 | } |
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166 | |||
167 | 110 | if ($oldAction !== null) { |
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168 | 4 | $this->action = $oldAction; |
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169 | } |
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170 | |||
171 | 110 | return $result; |
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172 | } |
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173 | |||
174 | /** |
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175 | * Runs a request specified in terms of a route. |
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176 | * The route can be either an ID of an action within this controller or a complete route consisting |
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177 | * of module IDs, controller ID and action ID. If the route starts with a slash '/', the parsing of |
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178 | * the route will start from the application; otherwise, it will start from the parent module of this controller. |
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179 | * @param string $route the route to be handled, e.g., 'view', 'comment/view', '/admin/comment/view'. |
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180 | * @param array $params the parameters to be passed to the action. |
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181 | * @return mixed the result of the action. |
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182 | * @see runAction() |
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183 | */ |
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184 | 95 | public function run($route, $params = []) |
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185 | { |
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186 | 95 | $pos = strpos($route, '/'); |
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187 | 95 | if ($pos === false) { |
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188 | 94 | return $this->runAction($route, $params); |
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189 | 1 | } elseif ($pos > 0) { |
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190 | 1 | return $this->module->runAction($route, $params); |
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191 | } |
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192 | return Yii::$app->runAction(ltrim($route, '/'), $params); |
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193 | } |
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194 | |||
195 | /** |
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196 | * Binds the parameters to the action. |
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197 | * This method is invoked by [[Action]] when it begins to run with the given parameters. |
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198 | * @param Action $action the action to be bound with parameters. |
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199 | * @param array $params the parameters to be bound to the action. |
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200 | * @return array the valid parameters that the action can run with. |
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201 | */ |
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202 | 3 | public function bindActionParams($action, $params) |
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203 | { |
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204 | 3 | return []; |
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205 | } |
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206 | |||
207 | /** |
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208 | * Creates an action based on the given action ID. |
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209 | * The method first checks if the action ID has been declared in [[actions()]]. If so, |
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210 | * it will use the configuration declared there to create the action object. |
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211 | * If not, it will look for a controller method whose name is in the format of `actionXyz` |
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212 | * where `Xyz` stands for the action ID. If found, an [[InlineAction]] representing that |
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213 | * method will be created and returned. |
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214 | * @param string $id the action ID. |
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215 | * @return Action|null the newly created action instance. Null if the ID doesn't resolve into any action. |
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216 | */ |
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217 | 122 | public function createAction($id) |
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218 | { |
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219 | 122 | if ($id === '') { |
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220 | 3 | $id = $this->defaultAction; |
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221 | } |
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222 | |||
223 | 122 | $actionMap = $this->actions(); |
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224 | 122 | if (isset($actionMap[$id])) { |
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225 | 7 | return Yii::createObject($actionMap[$id], [$id, $this]); |
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226 | 115 | } elseif (preg_match('/^[a-z0-9\\-_]+$/', $id) && strpos($id, '--') === false && trim($id, '-') === $id) { |
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227 | 115 | $methodName = 'action' . str_replace(' ', '', ucwords(implode(' ', explode('-', $id)))); |
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228 | 115 | if (method_exists($this, $methodName)) { |
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229 | 115 | $method = new \ReflectionMethod($this, $methodName); |
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230 | 115 | if ($method->isPublic() && $method->getName() === $methodName) { |
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231 | 115 | return new InlineAction($id, $this, $methodName); |
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232 | } |
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233 | } |
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234 | } |
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235 | |||
236 | return null; |
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237 | } |
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238 | |||
239 | /** |
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240 | * This method is invoked right before an action is executed. |
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241 | * |
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242 | * The method will trigger the [[EVENT_BEFORE_ACTION]] event. The return value of the method |
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243 | * will determine whether the action should continue to run. |
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244 | * |
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245 | * In case the action should not run, the request should be handled inside of the `beforeAction` code |
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246 | * by either providing the necessary output or redirecting the request. Otherwise the response will be empty. |
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247 | * |
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248 | * If you override this method, your code should look like the following: |
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249 | * |
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250 | * ```php |
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251 | * public function beforeAction($action) |
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252 | * { |
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253 | * // your custom code here, if you want the code to run before action filters, |
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254 | * // which are triggered on the [[EVENT_BEFORE_ACTION]] event, e.g. PageCache or AccessControl |
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255 | * |
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256 | * if (!parent::beforeAction($action)) { |
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257 | * return false; |
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258 | * } |
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259 | * |
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260 | * // other custom code here |
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261 | * |
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262 | * return true; // or false to not run the action |
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263 | * } |
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264 | * ``` |
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265 | * |
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266 | * @param Action $action the action to be executed. |
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267 | * @return bool whether the action should continue to run. |
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268 | */ |
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269 | 114 | public function beforeAction($action) |
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270 | { |
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271 | 114 | $event = new ActionEvent($action); |
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272 | 114 | $this->trigger(self::EVENT_BEFORE_ACTION, $event); |
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273 | 114 | return $event->isValid; |
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274 | } |
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275 | |||
276 | /** |
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277 | * This method is invoked right after an action is executed. |
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278 | * |
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279 | * The method will trigger the [[EVENT_AFTER_ACTION]] event. The return value of the method |
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280 | * will be used as the action return value. |
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281 | * |
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282 | * If you override this method, your code should look like the following: |
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283 | * |
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284 | * ```php |
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285 | * public function afterAction($action, $result) |
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286 | * { |
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287 | * $result = parent::afterAction($action, $result); |
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288 | * // your custom code here |
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289 | * return $result; |
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290 | * } |
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291 | * ``` |
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292 | * |
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293 | * @param Action $action the action just executed. |
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294 | * @param mixed $result the action return result. |
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295 | * @return mixed the processed action result. |
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296 | */ |
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297 | 110 | public function afterAction($action, $result) |
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298 | { |
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299 | 110 | $event = new ActionEvent($action); |
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300 | 110 | $event->result = $result; |
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301 | 110 | $this->trigger(self::EVENT_AFTER_ACTION, $event); |
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302 | 110 | return $event->result; |
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303 | } |
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304 | |||
305 | /** |
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306 | * Returns all ancestor modules of this controller. |
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307 | * The first module in the array is the outermost one (i.e., the application instance), |
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308 | * while the last is the innermost one. |
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309 | * @return Module[] all ancestor modules that this controller is located within. |
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310 | */ |
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311 | 114 | public function getModules() |
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312 | { |
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313 | 114 | $modules = [$this->module]; |
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314 | 114 | $module = $this->module; |
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315 | 114 | while ($module->module !== null) { |
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316 | array_unshift($modules, $module->module); |
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317 | $module = $module->module; |
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318 | } |
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319 | 114 | return $modules; |
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320 | } |
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321 | |||
322 | /** |
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323 | * Returns the unique ID of the controller. |
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324 | * @return string the controller ID that is prefixed with the module ID (if any). |
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325 | */ |
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326 | 142 | public function getUniqueId() |
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327 | { |
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328 | 142 | return $this->module instanceof Application ? $this->id : $this->module->getUniqueId() . '/' . $this->id; |
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329 | } |
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330 | |||
331 | /** |
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332 | * Returns the route of the current request. |
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333 | * @return string the route (module ID, controller ID and action ID) of the current request. |
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334 | */ |
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335 | 4 | public function getRoute() |
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336 | { |
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337 | 4 | return $this->action !== null ? $this->action->getUniqueId() : $this->getUniqueId(); |
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338 | } |
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339 | |||
340 | /** |
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341 | * Renders a view and applies layout if available. |
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342 | * |
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343 | * The view to be rendered can be specified in one of the following formats: |
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344 | * |
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345 | * - [path alias](guide:concept-aliases) (e.g. "@app/views/site/index"); |
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346 | * - absolute path within application (e.g. "//site/index"): the view name starts with double slashes. |
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347 | * The actual view file will be looked for under the [[Application::viewPath|view path]] of the application. |
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348 | * - absolute path within module (e.g. "/site/index"): the view name starts with a single slash. |
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349 | * The actual view file will be looked for under the [[Module::viewPath|view path]] of [[module]]. |
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350 | * - relative path (e.g. "index"): the actual view file will be looked for under [[viewPath]]. |
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351 | * |
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352 | * To determine which layout should be applied, the following two steps are conducted: |
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353 | * |
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354 | * 1. In the first step, it determines the layout name and the context module: |
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355 | * |
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356 | * - If [[layout]] is specified as a string, use it as the layout name and [[module]] as the context module; |
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357 | * - If [[layout]] is null, search through all ancestor modules of this controller and find the first |
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358 | * module whose [[Module::layout|layout]] is not null. The layout and the corresponding module |
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359 | * are used as the layout name and the context module, respectively. If such a module is not found |
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360 | * or the corresponding layout is not a string, it will return false, meaning no applicable layout. |
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361 | * |
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362 | * 2. In the second step, it determines the actual layout file according to the previously found layout name |
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363 | * and context module. The layout name can be: |
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364 | * |
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365 | * - a [path alias](guide:concept-aliases) (e.g. "@app/views/layouts/main"); |
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366 | * - an absolute path (e.g. "/main"): the layout name starts with a slash. The actual layout file will be |
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367 | * looked for under the [[Application::layoutPath|layout path]] of the application; |
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368 | * - a relative path (e.g. "main"): the actual layout file will be looked for under the |
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369 | * [[Module::layoutPath|layout path]] of the context module. |
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370 | * |
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371 | * If the layout name does not contain a file extension, it will use the default one `.php`. |
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372 | * |
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373 | * @param string $view the view name. |
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374 | * @param array $params the parameters (name-value pairs) that should be made available in the view. |
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375 | * These parameters will not be available in the layout. |
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376 | * @return string the rendering result. |
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377 | * @throws InvalidParamException if the view file or the layout file does not exist. |
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378 | */ |
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379 | 6 | public function render($view, $params = []) |
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380 | { |
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381 | 6 | $content = $this->getView()->render($view, $params, $this); |
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382 | 5 | return $this->renderContent($content); |
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383 | } |
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384 | |||
385 | /** |
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386 | * Renders a static string by applying a layout. |
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387 | * @param string $content the static string being rendered |
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388 | * @return string the rendering result of the layout with the given static string as the `$content` variable. |
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389 | * If the layout is disabled, the string will be returned back. |
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390 | * @since 2.0.1 |
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391 | */ |
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392 | 5 | public function renderContent($content) |
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393 | { |
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394 | 5 | $layoutFile = $this->findLayoutFile($this->getView()); |
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395 | 5 | if ($layoutFile !== false) { |
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396 | return $this->getView()->renderFile($layoutFile, ['content' => $content], $this); |
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397 | } |
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398 | 5 | return $content; |
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399 | } |
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400 | |||
401 | /** |
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402 | * Renders a view without applying layout. |
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403 | * This method differs from [[render()]] in that it does not apply any layout. |
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404 | * @param string $view the view name. Please refer to [[render()]] on how to specify a view name. |
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405 | * @param array $params the parameters (name-value pairs) that should be made available in the view. |
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406 | * @return string the rendering result. |
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407 | * @throws InvalidParamException if the view file does not exist. |
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408 | */ |
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409 | public function renderPartial($view, $params = []) |
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410 | { |
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411 | return $this->getView()->render($view, $params, $this); |
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412 | } |
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413 | |||
414 | /** |
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415 | * Renders a view file. |
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416 | * @param string $file the view file to be rendered. This can be either a file path or a [path alias](guide:concept-aliases). |
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417 | * @param array $params the parameters (name-value pairs) that should be made available in the view. |
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418 | * @return string the rendering result. |
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419 | * @throws InvalidParamException if the view file does not exist. |
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420 | */ |
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421 | 9 | public function renderFile($file, $params = []) |
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422 | { |
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423 | 9 | return $this->getView()->renderFile($file, $params, $this); |
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424 | } |
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425 | |||
426 | /** |
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427 | * Returns the view object that can be used to render views or view files. |
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428 | * The [[render()]], [[renderPartial()]] and [[renderFile()]] methods will use |
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429 | * this view object to implement the actual view rendering. |
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430 | * If not set, it will default to the "view" application component. |
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431 | * @return View|\yii\web\View the view object that can be used to render views or view files. |
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432 | */ |
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433 | 15 | public function getView() |
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434 | { |
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435 | 15 | if ($this->_view === null) { |
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436 | 15 | $this->_view = Yii::$app->getView(); |
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437 | } |
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438 | 15 | return $this->_view; |
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439 | } |
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440 | |||
441 | /** |
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442 | * Sets the view object to be used by this controller. |
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443 | * @param View|\yii\web\View $view the view object that can be used to render views or view files. |
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444 | */ |
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445 | public function setView($view) |
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446 | { |
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447 | $this->_view = $view; |
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448 | } |
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449 | |||
450 | /** |
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451 | * Returns the directory containing view files for this controller. |
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452 | * The default implementation returns the directory named as controller [[id]] under the [[module]]'s |
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453 | * [[viewPath]] directory. |
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454 | * @return string the directory containing the view files for this controller. |
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455 | */ |
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456 | 1 | public function getViewPath() |
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457 | { |
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458 | 1 | if ($this->_viewPath === null) { |
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459 | 1 | $this->_viewPath = $this->module->getViewPath() . DIRECTORY_SEPARATOR . $this->id; |
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460 | } |
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461 | 1 | return $this->_viewPath; |
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462 | } |
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463 | |||
464 | /** |
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465 | * Sets the directory that contains the view files. |
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466 | * @param string $path the root directory of view files. |
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467 | * @throws InvalidParamException if the directory is invalid |
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468 | * @since 2.0.7 |
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469 | */ |
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470 | public function setViewPath($path) |
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471 | { |
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472 | $this->_viewPath = Yii::getAlias($path); |
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It seems like
\Yii::getAlias($path) can also be of type boolean . However, the property $_viewPath is declared as type string . Maybe add an additional type check?
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable Either this assignment is in error or a type check should be added for that assignment. class Id
{
public $id;
public function __construct($id)
{
$this->id = $id;
}
}
class Account
{
/** @var Id $id */
public $id;
}
$account_id = false;
if (starsAreRight()) {
$account_id = new Id(42);
}
$account = new Account();
if ($account instanceof Id)
{
$account->id = $account_id;
}
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473 | } |
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474 | |||
475 | /** |
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476 | * Finds the applicable layout file. |
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477 | * @param View $view the view object to render the layout file. |
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478 | * @return string|bool the layout file path, or false if layout is not needed. |
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479 | * Please refer to [[render()]] on how to specify this parameter. |
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480 | * @throws InvalidParamException if an invalid path alias is used to specify the layout. |
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481 | */ |
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482 | 5 | public function findLayoutFile($view) |
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483 | { |
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484 | 5 | $module = $this->module; |
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485 | 5 | if (is_string($this->layout)) { |
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486 | $layout = $this->layout; |
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487 | 5 | } elseif ($this->layout === null) { |
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488 | while ($module !== null && $module->layout === null) { |
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489 | $module = $module->module; |
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490 | } |
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491 | if ($module !== null && is_string($module->layout)) { |
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492 | $layout = $module->layout; |
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493 | } |
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494 | } |
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495 | |||
496 | 5 | if (!isset($layout)) { |
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497 | 5 | return false; |
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498 | } |
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499 | |||
500 | if (strncmp($layout, '@', 1) === 0) { |
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501 | $file = Yii::getAlias($layout); |
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502 | } elseif (strncmp($layout, '/', 1) === 0) { |
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503 | $file = Yii::$app->getLayoutPath() . DIRECTORY_SEPARATOR . substr($layout, 1); |
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504 | } else { |
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505 | $file = $module->getLayoutPath() . DIRECTORY_SEPARATOR . $layout; |
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506 | } |
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507 | |||
508 | if (pathinfo($file, PATHINFO_EXTENSION) !== '') { |
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509 | return $file; |
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510 | } |
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511 | $path = $file . '.' . $view->defaultExtension; |
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512 | if ($view->defaultExtension !== 'php' && !is_file($path)) { |
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513 | $path = $file . '.php'; |
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514 | } |
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515 | |||
516 | return $path; |
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517 | } |
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518 | } |
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519 |
If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue.