Complex classes like Connection 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 Connection, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 37 | class Connection extends Component |
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| 38 | { |
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| 39 | const EVENT_AFTER_OPEN = 'afterOpen'; |
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| 40 | |||
| 41 | /** |
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| 42 | * @var array Config |
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| 43 | */ |
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| 44 | public $config = []; |
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| 45 | |||
| 46 | /** |
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| 47 | * @var Handler |
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| 48 | */ |
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| 49 | protected static $_handler = null; |
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| 50 | |||
| 51 | /** |
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| 52 | * @var array authorization config |
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| 53 | */ |
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| 54 | protected $_auth = []; |
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| 55 | |||
| 56 | /** |
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| 57 | * @var bool is auth disabled |
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| 58 | */ |
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| 59 | protected $_disabledAuth = false; |
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| 60 | |||
| 61 | /** |
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| 62 | * @var Closure Callback to test if API response has error |
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| 63 | * The function signature: `function ($response)` |
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| 64 | * Must return `null`, if the response does not contain an error. |
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| 65 | */ |
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| 66 | protected $_errorChecker; |
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| 67 | |||
| 68 | public function setAuth($auth) |
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| 72 | |||
| 73 | /** |
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| 74 | * Returns auth settings. |
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| 75 | * @return array |
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| 76 | */ |
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| 77 | 2 | public function getAuth() |
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| 88 | |||
| 89 | public function disableAuth() |
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| 93 | |||
| 94 | public function enableAuth() |
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| 98 | |||
| 99 | /** |
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| 100 | * {@inheritdoc} |
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| 101 | * @throws InvalidConfigException |
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| 102 | */ |
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| 103 | 2 | public function init() |
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| 113 | |||
| 114 | /** |
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| 115 | * Closes the connection when this component is being serialized. |
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| 116 | * @return array |
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| 117 | */ |
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| 118 | public function __sleep() |
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| 122 | |||
| 123 | /** |
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| 124 | * Returns the name of the DB driver for the current [[dsn]]. |
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| 125 | * |
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| 126 | * @return string name of the DB driver |
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| 127 | */ |
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| 128 | public function getDriverName() |
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| 132 | |||
| 133 | /** |
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| 134 | * Creates a command for execution. |
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| 135 | * |
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| 136 | * @param array $config the configuration for the Command class |
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| 137 | * |
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| 138 | * @return Command the DB command |
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| 139 | */ |
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| 140 | public function createCommand($config = []) |
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| 147 | |||
| 148 | /** |
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| 149 | * Creates new query builder instance. |
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| 150 | * |
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| 151 | * @return QueryBuilder |
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| 152 | */ |
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| 153 | public function getQueryBuilder() |
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| 157 | |||
| 158 | /** |
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| 159 | * Performs GET HTTP request. |
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| 160 | * @param string $url URL |
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| 161 | * @param array $query query options |
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| 162 | * @param string $body request body |
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| 163 | * @param bool $raw if response body contains JSON and should be decoded |
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| 164 | * @throws HiArtException |
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| 165 | * @throws \yii\base\InvalidConfigException |
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| 166 | * @return mixed response |
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| 167 | */ |
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| 168 | 2 | public function get($url, $query = [], $body = null, $raw = false) |
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| 172 | |||
| 173 | /** |
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| 174 | * Performs HEAD HTTP request. |
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| 175 | * @param string $url URL |
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| 176 | * @param array $query query options |
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| 177 | * @param string $body request body |
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| 178 | * @throws HiArtException |
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| 179 | * @throws \yii\base\InvalidConfigException |
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| 180 | * @return mixed response |
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| 181 | */ |
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| 182 | public function head($url, $query = [], $body = null) |
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| 186 | |||
| 187 | /** |
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| 188 | * Performs POST HTTP request. |
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| 189 | * @param string $url URL |
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| 190 | * @param array $query query options |
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| 191 | * @param string $body request body |
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| 192 | * @param bool $raw if response body contains JSON and should be decoded |
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| 193 | * @throws HiArtException |
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| 194 | * @throws \yii\base\InvalidConfigException |
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| 195 | * @return mixed response |
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| 196 | */ |
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| 197 | public function post($url, $query = [], $body = null, $raw = false) |
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| 201 | |||
| 202 | /** |
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| 203 | * Performs PUT HTTP request. |
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| 204 | * @param string $url URL |
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| 205 | * @param array $query query options |
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| 206 | * @param string $body request body |
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| 207 | * @param bool $raw if response body contains JSON and should be decoded |
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| 208 | * @throws HiArtException |
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| 209 | * @throws \yii\base\InvalidConfigException |
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| 210 | * @return mixed response |
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| 211 | */ |
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| 212 | public function put($url, $query = [], $body = null, $raw = false) |
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| 216 | |||
| 217 | /** |
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| 218 | * Performs DELETE HTTP request. |
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| 219 | * @param string $url URL |
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| 220 | * @param array $query query options |
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| 221 | * @param string $body request body |
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| 222 | * @param bool $raw if response body contains JSON and should be decoded |
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| 223 | * @throws HiArtException |
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| 224 | * @throws \yii\base\InvalidConfigException |
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| 225 | * @return mixed response |
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| 226 | */ |
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| 227 | public function delete($url, $query = [], $body = null, $raw = false) |
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| 231 | |||
| 232 | /** |
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| 233 | * XXX DEPRECATED in favour of post(). |
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| 234 | * @param $url |
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| 235 | * @param array $query |
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| 236 | * @return mixed |
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| 237 | */ |
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| 238 | public function perform($url, $body = []) |
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| 242 | |||
| 243 | /** |
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| 244 | * Make request and check for error. |
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| 245 | * @param string $url URL |
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| 246 | * @param array $query query options, (GET parameters) |
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| 247 | * @param string $body request body, (POST parameters) |
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| 248 | * @param bool $raw if response body contains JSON and should be decoded |
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| 249 | * @throws HiArtException |
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| 250 | * @throws \yii\base\InvalidConfigException |
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| 251 | * @return mixed response |
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| 252 | */ |
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| 253 | 2 | public function makeRequest($method, $url, $query = [], $body = null, $raw = false) |
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| 259 | |||
| 260 | /** |
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| 261 | * Creates URL. |
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| 262 | * @param mixed $path path |
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| 263 | * @param array $query query options |
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| 264 | * @return array |
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| 265 | */ |
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| 266 | 2 | private function prepareUrl($path, array $query = []) |
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| 276 | |||
| 277 | /** |
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| 278 | * Handles the request with handler. |
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| 279 | * Returns array or raw response content, if $raw is true. |
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| 280 | * |
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| 281 | * @param string $method POST, GET, etc |
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| 282 | * @param string $url the URL for request, not including proto and site |
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| 283 | * @param array|string $body the request body. When array - will be sent as POST params, otherwise - as RAW body. |
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| 284 | * @param bool $raw Whether to decode data, when response is decodeable (JSON). |
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| 285 | * @return array|string |
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| 286 | */ |
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| 287 | 2 | protected function handleRequest($method, $url, $body = null, $raw = false) |
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| 303 | |||
| 304 | /** |
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| 305 | * Returns the request handler (Guzzle client for the moment). |
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| 306 | * Creates and setups handler if not set. |
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| 307 | * @return Handler |
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| 308 | */ |
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| 309 | 2 | public function getHandler() |
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| 317 | |||
| 318 | /** |
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| 319 | * Set handler manually. |
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| 320 | * @param Handler $value |
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| 321 | * @return void |
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| 322 | */ |
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| 323 | 2 | public function setHandler($value) |
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| 327 | |||
| 328 | /** |
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| 329 | * @return boolean |
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| 330 | */ |
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| 331 | public function isDisabledAuth() |
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| 335 | |||
| 336 | /** |
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| 337 | * @param boolean $disabledAuth |
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| 338 | */ |
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| 339 | public function setDisabledAuth($disabledAuth) |
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| 343 | |||
| 344 | /** |
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| 345 | * Try to decode error information if it is valid json, return it if not. |
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| 346 | * @param $body |
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| 347 | * @return mixed |
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| 348 | */ |
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| 349 | protected function decodeErrorBody($body) |
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| 363 | |||
| 364 | /** |
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| 365 | * Setter for errorChecker. |
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| 366 | * @param Closure|array $value |
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| 367 | * @return void |
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| 368 | */ |
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| 369 | 2 | public function setErrorChecker($value) |
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| 373 | |||
| 374 | /** |
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| 375 | * Checks response with checkError method and raises exception if error. |
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| 376 | * @param array $response response data from API |
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| 377 | * @param string $url request URL |
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| 378 | * @param array $options request data |
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| 379 | * @throws ErrorResponseException |
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| 380 | * @return array |
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| 381 | */ |
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| 382 | 2 | protected function checkResponse($response, $url, $options) |
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| 395 | |||
| 396 | /** |
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| 397 | * Checks response with errorChecker callback and returns not null if error. |
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| 398 | * @param array $response response data from API |
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| 399 | * @return null|string |
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| 400 | */ |
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| 401 | 2 | public function checkError($response) |
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| 409 | } |
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| 410 |
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..