Complex classes like Router often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Router, and based on these observations, apply Extract Interface, too.
1 | <?php |
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28 | class Router |
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29 | { |
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30 | /** |
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31 | * @var bool true if this router dispatches itself when destroyed, false |
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32 | * otherwise |
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33 | */ |
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34 | public $isAutoDispatched = true; |
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35 | |||
36 | /** |
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37 | * @var bool true if this router accepts _method HTTP hacks for PUT and |
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38 | * DELETE via POST |
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39 | */ |
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40 | public $methodOverriding = false; |
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41 | |||
42 | /** |
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43 | * @var array An array of routines that must be applied to every route |
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44 | * instance |
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45 | */ |
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46 | protected $globalRoutines = array(); |
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47 | |||
48 | /** |
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49 | * @var array An array of main routes for this router |
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50 | */ |
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51 | protected $routes = array(); |
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52 | |||
53 | /** |
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54 | * @var array An array of side routes (errors, exceptions, etc) for this |
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55 | * router |
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56 | */ |
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57 | protected $sideRoutes = array(); |
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58 | |||
59 | /** |
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60 | * @var string The prefix for every requested URI starting with a slash |
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61 | */ |
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62 | protected $virtualHost = ''; |
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63 | |||
64 | /** |
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65 | * Compares two patterns and returns the first one according to |
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66 | * similarity or ocurrences of a subpattern |
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67 | * |
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68 | * @param string $patternA some pattern |
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69 | * @param string $patternB some pattern |
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70 | * @param string $sub pattern needle |
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71 | * |
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72 | * @return bool true if $patternA is before $patternB |
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73 | */ |
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74 | 10 | public static function compareOcurrences($patternA, $patternB, $sub) |
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79 | |||
80 | /** |
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81 | * Compares two patterns and returns the first one according to |
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82 | * similarity or presence of catch-all pattern |
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83 | * |
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84 | * @param string $patternA some pattern |
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85 | * @param string $patternB some pattern |
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86 | * |
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87 | * @return bool true if $patternA is before $patternB |
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88 | */ |
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89 | 25 | public static function comparePatternSimilarity($patternA, $patternB) |
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94 | |||
95 | /** |
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96 | * Compares two patterns and returns the first one according to |
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97 | * similarity, patterns or ocurrences of a subpattern |
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98 | * |
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99 | * @param string $patternA some pattern |
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100 | * @param string $patternB some pattern |
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101 | * @param string $sub pattern needle |
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102 | * |
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103 | * @return bool true if $patternA is before $patternB |
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104 | */ |
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105 | 25 | public static function compareRoutePatterns($patternA, $patternB, $sub) |
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110 | |||
111 | /** |
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112 | * Cleans up an return an array of extracted parameters |
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113 | * |
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114 | * @param array $params an array of params |
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115 | * |
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116 | * @see Respect\Rest\Request::$params |
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117 | * |
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118 | * @return array only the non-empty params |
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119 | */ |
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120 | 117 | protected static function cleanUpParams(array $params) |
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121 | { |
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122 | //using array_values to reset array keys |
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123 | 117 | return array_values( |
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124 | 117 | array_filter( |
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125 | 117 | $params, |
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126 | function ($param) { |
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127 | |||
128 | //remove any empty string param |
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129 | 69 | return $param !== ''; |
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130 | 117 | } |
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131 | ) |
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132 | ); |
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133 | } |
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134 | |||
135 | /** |
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136 | * Builds and appends many kinds of routes magically. |
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137 | * |
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138 | * @param string $method The HTTP method for the new route |
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139 | */ |
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140 | 113 | public function __call($method, $args) |
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141 | { |
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142 | 113 | if (count($args) < 2) { |
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143 | 5 | throw new InvalidArgumentException( |
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144 | 5 | 'Any route binding must at least 2 arguments' |
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145 | ); |
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146 | } |
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147 | |||
148 | 108 | list($path, $routeTarget) = $args; |
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149 | |||
150 | // Support multiple route definitions as array of paths |
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151 | 108 | if (is_array($path)) { |
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152 | $lastPath = array_pop($path); |
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153 | foreach ($path as $p) { |
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154 | $this->$method($p, $routeTarget); |
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155 | } |
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156 | |||
157 | return $this->$method($lastPath, $routeTarget); |
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158 | } |
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159 | |||
160 | //closures, func names, callbacks |
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161 | 108 | if (is_callable($routeTarget)) { |
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162 | //raw callback |
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163 | 69 | if (!isset($args[2])) { |
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164 | 67 | return $this->callbackRoute($method, $path, $routeTarget); |
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165 | } else { |
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166 | 2 | return $this->callbackRoute( |
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167 | 2 | $method, |
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168 | 2 | $path, |
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169 | 2 | $routeTarget, |
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170 | 2 | $args[2] |
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171 | ); |
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172 | } |
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173 | |||
174 | //direct instances |
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175 | 40 | } elseif ($routeTarget instanceof Routable) { |
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176 | 3 | return $this->instanceRoute($method, $path, $routeTarget); |
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177 | |||
178 | //static returns the argument itself |
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179 | 37 | } elseif (!is_string($routeTarget)) { |
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180 | 3 | return $this->staticRoute($method, $path, $routeTarget); |
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181 | |||
182 | //static returns the argument itself |
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183 | } elseif ( |
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184 | 34 | is_string($routeTarget) |
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185 | 34 | && !(class_exists($routeTarget) || interface_exists($routeTarget)) |
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186 | ) { |
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187 | 20 | return $this->staticRoute($method, $path, $routeTarget); |
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188 | |||
189 | //classes |
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190 | } else { |
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191 | //raw classnames |
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192 | 14 | if (!isset($args[2])) { |
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193 | 7 | return $this->classRoute($method, $path, $routeTarget); |
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194 | |||
195 | //classnames as factories |
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196 | 7 | } elseif (is_callable($args[2])) { |
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197 | 3 | return $this->factoryRoute( |
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198 | 3 | $method, |
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199 | 3 | $path, |
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200 | 3 | $routeTarget, |
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201 | 3 | $args[2] |
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202 | ); |
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203 | |||
204 | //classnames with constructor arguments |
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205 | } else { |
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206 | 4 | return $this->classRoute( |
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207 | 4 | $method, |
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208 | 4 | $path, |
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209 | 4 | $routeTarget, |
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210 | 4 | $args[2] |
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211 | ); |
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212 | } |
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213 | } |
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214 | } |
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215 | |||
216 | /** |
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217 | * @param mixed $virtualHost null for no virtual host or a string prefix |
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218 | * for every URI |
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219 | */ |
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220 | 148 | public function __construct($virtualHost = null) |
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224 | |||
225 | /** If $this->autoDispatched, dispatches the app */ |
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226 | 50 | public function __destruct() |
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234 | |||
235 | /** Runs the router and returns its output */ |
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236 | public function __toString() |
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247 | |||
248 | /** |
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249 | * Applies a routine to every route |
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250 | * |
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251 | * @param string $routineName a name of some routine (Accept, When, etc) |
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252 | * @param array $param1 some param |
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253 | * @param array $param2 some param |
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254 | * @param array $etc This function accepts infinite params |
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255 | * that will be passed to the routine instance |
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256 | * |
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257 | * @see Respect\Rest\Request::$params |
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258 | * |
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259 | * @return Router the router itself. |
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260 | */ |
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261 | 3 | public function always($routineName, $param1 = null, $param2 = null, $etc = null) |
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276 | |||
277 | /** |
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278 | * Appends a pre-built route to the dispatcher |
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279 | * |
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280 | * @param AbstractRoute $route Any route |
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281 | * |
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282 | * @return Router the router itself |
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283 | */ |
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284 | 141 | public function appendRoute(AbstractRoute $route) |
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298 | |||
299 | /** |
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300 | * Appends a pre-built side route to the dispatcher |
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301 | * |
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302 | * @param AbstractRoute $route Any route |
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303 | * |
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304 | * @return Router the router itself |
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305 | */ |
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306 | public function appendSideRoute(AbstractRoute $route) |
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316 | |||
317 | /** |
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318 | * Creates and returns a callback-based route |
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319 | * |
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320 | * @param string $method The HTTP method |
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321 | * @param string $path The URI pattern for this route |
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322 | * @param callable $callback Any callback for this route |
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323 | * @param array $arguments Additional arguments for the callback |
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324 | * |
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325 | * @return Respect\Rest\Routes\Callback The route instance |
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326 | */ |
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327 | 96 | public function callbackRoute( |
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338 | |||
339 | /** |
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340 | * Creates and returns a class-based route |
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341 | * |
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342 | * @param string $method The HTTP method |
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343 | * @param string $path The URI pattern for this route |
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344 | * @param string $class Some class name |
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345 | * @param array $arguments The class constructor arguments |
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346 | * |
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347 | * @return Respect\Rest\Routes\ClassName The route instance |
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348 | */ |
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349 | 12 | public function classRoute($method, $path, $class, array $arguments = array()) |
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356 | |||
357 | /** |
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358 | * Dispatches the router |
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359 | * |
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360 | * @param mixed $method null to infer it or an HTTP method (GET, POST, etc) |
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361 | * @param mixed $uri null to infer it or a request URI path (/foo/bar) |
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362 | * |
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363 | * @return mixed Whatever you returned from your model |
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364 | */ |
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365 | 98 | public function dispatch($method = null, $uri = null) |
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369 | |||
370 | /** |
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371 | * Dispatch the current route with a custom Request |
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372 | * |
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373 | * @param Request $request Some request |
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374 | * |
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375 | * @return mixed Whatever the dispatched route returns |
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376 | */ |
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377 | 134 | public function dispatchRequest(Request $request = null) |
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385 | |||
386 | /** |
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387 | * Creates and returns a side-route for catching exceptions |
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388 | * |
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389 | * @param string $className The name of the exception class you want to |
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390 | * catch. 'Exception' will catch them all. |
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391 | * @param string $callback The function to run when an exception is cautght |
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392 | * |
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393 | * @return Respect\Rest\Routes\Exception |
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394 | */ |
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395 | 1 | public function exceptionRoute($className, $callback = null) |
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402 | |||
403 | /** |
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404 | * Creates and returns a side-route for catching errors |
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405 | * |
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406 | * @param string $callback The function to run when an error is cautght |
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407 | * |
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408 | * @return Respect\Rest\Routes\Error |
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409 | */ |
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410 | 1 | public function errorRoute($callback) |
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417 | |||
418 | /** |
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419 | * Creates and returns an factory-based route |
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420 | * |
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421 | * @param string $method The HTTP metod (GET, POST, etc) |
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422 | * @param string $path The URI Path (/foo/bar...) |
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423 | * @param string $className The class name of the factored instance |
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424 | * @param string $factory Any callable |
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425 | * |
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426 | * @return Respect\Rest\Routes\Factory The route created |
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427 | */ |
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428 | 3 | public function factoryRoute($method, $path, $className, $factory) |
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435 | |||
436 | /** |
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437 | * Iterates over a list of routes and return the allowed methods for them |
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438 | * |
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439 | * @param array $routes an array of AbstractRoute |
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440 | * |
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441 | * @return array an array of unique allowed methods |
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442 | */ |
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443 | 134 | public function getAllowedMethods(array $routes) |
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453 | |||
454 | /** |
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455 | * Checks if router overrides the method with _method hack |
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456 | * |
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457 | * @return bool true if the router overrides current request method, false |
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458 | * otherwise |
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459 | */ |
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460 | 134 | public function hasDispatchedOverridenMethod() |
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467 | |||
468 | /** |
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469 | * Creates and returns an instance-based route |
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470 | * |
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471 | * @param string $method The HTTP metod (GET, POST, etc) |
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472 | * @param string $path The URI Path (/foo/bar...) |
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473 | * @param string $instance An instance of Routinable |
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474 | * |
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475 | * @return Respect\Rest\Routes\Instance The route created |
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476 | */ |
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477 | 8 | public function instanceRoute($method, $path, $instance) |
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484 | |||
485 | /** |
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486 | * Checks if request is a global OPTIONS (OPTIONS * HTTP/1.1) |
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487 | * |
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488 | * @return bool true if the request is a global options, false otherwise |
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489 | */ |
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490 | 134 | public function isDispatchedToGlobalOptionsMethod() |
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495 | |||
496 | /** |
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497 | * Checks if a request doesn't apply for routes at all |
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498 | * |
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499 | * @param Request $request A request |
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500 | * |
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501 | * @return bool true if the request doesn't apply for routes |
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502 | */ |
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503 | 134 | public function isRoutelessDispatch(Request $request = null) |
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527 | |||
528 | /** |
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529 | * Performs the main route dispatching mechanism |
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530 | */ |
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531 | 132 | public function routeDispatch() |
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551 | |||
552 | /** |
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553 | * Dispatches and get response with default request parameters |
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554 | * |
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555 | * @param Request $request Some request |
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556 | * |
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557 | * @return string the response string |
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558 | */ |
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559 | 18 | public function run(Request $request = null) |
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581 | |||
582 | /** |
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583 | * Creates and returns a static route |
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584 | * |
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585 | * @param string $method The HTTP method (GET, POST, etc) |
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586 | * @param string $path The URI Path (/foo/bar...) |
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587 | * @param string $staticValue Some static value to be printed |
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588 | * |
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589 | * @return Respect\Rest\Routes\StaticValue The route created |
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590 | */ |
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591 | 23 | public function staticRoute($method, $path, $staticValue) |
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598 | |||
599 | /** Applies the virtualHost prefix on the current request */ |
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600 | 132 | protected function applyVirtualHost() |
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610 | |||
611 | /** |
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612 | * Configures a request for a specific route with specific parameters |
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613 | * |
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614 | * @param Request $request Some request |
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615 | * @param AbstractRoute $route Some route |
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616 | * @param array $params A list of URI params |
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617 | * |
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618 | * @see Respect\Rest\Request::$params |
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619 | * |
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620 | * @return Request a configured Request instance |
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621 | */ |
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622 | 117 | protected function configureRequest( |
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632 | |||
633 | /** |
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634 | * Return routes matched by path |
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635 | * |
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636 | * @return SplObjectStorage a list of routes matched by path |
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637 | */ |
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638 | 132 | protected function getMatchedRoutesByPath() |
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650 | |||
651 | /** |
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652 | * Sends an Allow header with allowed methods from a list |
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653 | * |
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654 | * @param array $allowedMethods A list of allowed methods |
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655 | * |
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656 | * @return null sends an Allow header. |
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657 | */ |
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658 | 9 | protected function informAllowedMethods(array $allowedMethods) |
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662 | |||
663 | /** |
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664 | * Informs the PHP environment of a not allowed method alongside |
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665 | * its allowed methods for that path |
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666 | * |
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667 | * @param array $allowedMethods A list of allowed methods |
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668 | * |
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669 | * @return null sends HTTP Status Line and Allow header. |
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670 | */ |
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671 | 6 | protected function informMethodNotAllowed(array $allowedMethods) |
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682 | |||
683 | /** |
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684 | * Handles a OPTIONS request, inform of the allowed methods and |
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685 | * calls custom OPTIONS handler (if any). |
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686 | * |
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687 | * @param array $allowedMethods A list of allowed methods |
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688 | * @param \SplObjectStorage $matchedByPath A list of matched routes by path |
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689 | * |
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690 | * @return null sends Allow header. |
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691 | */ |
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692 | 3 | protected function handleOptionsRequest(array $allowedMethods, \SplObjectStorage $matchedByPath) |
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702 | |||
703 | /** |
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704 | * Checks if a route matches a method |
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705 | * |
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706 | * @param AbstractRoute $route A route instance |
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707 | * @param string $methodName Name of the method to match |
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708 | * |
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709 | * @return bool true if route matches |
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710 | */ |
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711 | 123 | protected function matchesMethod(AbstractRoute $route, $methodName) |
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721 | |||
722 | /** |
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723 | * Returns true if the passed route matches the passed request |
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724 | * |
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725 | * @param Request $request Some request |
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726 | * @param AbstractRoute $route Some route |
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727 | * @param array $params A list of URI params |
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728 | * |
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729 | * @see Respect\Rest\Request::$params |
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730 | * |
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731 | * @return bool true if the route matches the request with that params |
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732 | */ |
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733 | 129 | protected function matchRoute( |
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744 | |||
745 | /** |
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746 | * Checks if a route matches its routines |
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747 | * |
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748 | * @param \SplObjectStorage $matchedByPath A list of routes matched by path |
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749 | * |
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750 | * @return bool true if route matches its routines |
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751 | */ |
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752 | 123 | protected function routineMatch(\SplObjectStorage $matchedByPath) |
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773 | |||
774 | /** Sorts current routes according to path and parameters */ |
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775 | 141 | protected function sortRoutesByComplexity() |
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803 | } |
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804 |
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: