silverstripe /
silverstripe-framework
Complex classes like ConfigManifest 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 ConfigManifest, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 18 | class ConfigManifest |
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| 19 | { |
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| 20 | |||
| 21 | /** @var string - The base path used when building the manifest */ |
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| 22 | protected $base; |
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| 23 | |||
| 24 | /** @var string - A string to prepend to all cache keys to ensure all keys are unique to just this $base */ |
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| 25 | protected $key; |
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| 26 | |||
| 27 | /** @var bool - Whether `test` directories should be searched when searching for configuration */ |
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| 28 | protected $includeTests; |
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| 29 | |||
| 30 | /** |
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| 31 | * @var Zend_Cache_Core |
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| 32 | */ |
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| 33 | protected $cache; |
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| 34 | |||
| 35 | /** |
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| 36 | * All the values needed to be collected to determine the correct combination of fragements for |
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| 37 | * the current environment. |
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| 38 | * @var array |
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| 39 | */ |
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| 40 | protected $variantKeySpec = false; |
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| 41 | |||
| 42 | /** |
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| 43 | * All the _config.php files. Need to be included every request & can't be cached. Not variant specific. |
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| 44 | * @var array |
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| 45 | */ |
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| 46 | protected $phpConfigSources = array(); |
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| 47 | |||
| 48 | /** |
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| 49 | * All the _config/*.yml fragments pre-parsed and sorted in ascending include order. Not variant specific. |
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| 50 | * @var array |
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| 51 | */ |
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| 52 | protected $yamlConfigFragments = array(); |
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| 53 | |||
| 54 | /** |
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| 55 | * The calculated config from _config/*.yml, sorted, filtered and merged. Variant specific. |
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| 56 | * @var array |
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| 57 | */ |
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| 58 | public $yamlConfig = array(); |
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| 59 | |||
| 60 | /** |
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| 61 | * The variant key state as when yamlConfig was loaded |
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| 62 | * @var string |
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| 63 | */ |
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| 64 | protected $yamlConfigVariantKey = null; |
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| 65 | |||
| 66 | /** |
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| 67 | * @var [callback] A list of callbacks to be called whenever the content of yamlConfig changes |
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| 68 | */ |
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| 69 | protected $configChangeCallbacks = array(); |
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| 70 | |||
| 71 | /** |
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| 72 | * A side-effect of collecting the _config fragments is the calculation of all module directories, since |
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| 73 | * the definition of a module is "a directory that contains either a _config.php file or a _config directory |
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| 74 | * @var array |
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| 75 | */ |
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| 76 | public $modules = array(); |
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| 77 | |||
| 78 | /** |
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| 79 | * Adds a path as a module |
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| 80 | * |
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| 81 | * @param string $path |
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| 82 | */ |
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| 83 | public function addModule($path) |
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| 91 | |||
| 92 | /** |
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| 93 | * Returns true if the passed module exists |
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| 94 | * |
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| 95 | * @param string $module |
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| 96 | * @return bool |
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| 97 | */ |
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| 98 | public function moduleExists($module) |
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| 102 | |||
| 103 | /** |
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| 104 | * Constructs and initialises a new configuration object, either loading |
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| 105 | * from the cache or re-scanning for classes. |
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| 106 | * |
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| 107 | * @param string $base The project base path. |
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| 108 | * @param bool $includeTests |
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| 109 | * @param bool $forceRegen Force the manifest to be regenerated. |
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| 110 | */ |
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| 111 | public function __construct($base, $includeTests = false, $forceRegen = false) |
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| 136 | |||
| 137 | /** |
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| 138 | * Provides a hook for mock unit tests despite no DI |
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| 139 | * @return Zend_Cache_Core |
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| 140 | */ |
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| 141 | protected function getCache() |
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| 148 | |||
| 149 | /** |
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| 150 | * Register a callback to be called whenever the calculated merged config changes |
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| 151 | * |
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| 152 | * In some situations the merged config can change - for instance, code in _config.php can cause which Only |
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| 153 | * and Except fragments match. Registering a callback with this function allows code to be called when |
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| 154 | * this happens. |
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| 155 | * |
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| 156 | * @param callback $callback |
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| 157 | */ |
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| 158 | public function registerChangeCallback($callback) |
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| 162 | |||
| 163 | /** |
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| 164 | * Includes all of the php _config.php files found by this manifest. Called by SS_Config when adding this manifest |
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| 165 | * @return void |
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| 166 | */ |
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| 167 | public function activateConfig() |
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| 177 | |||
| 178 | /** |
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| 179 | * Gets the (merged) config value for the given class and config property name |
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| 180 | * |
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| 181 | * @param string $class - The class to get the config property value for |
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| 182 | * @param string $name - The config property to get the value for |
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| 183 | * @param mixed $default - What to return if no value was contained in any YAML file for the passed $class and $name |
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| 184 | * @return mixed The merged set of all values contained in all the YAML configuration files for the passed |
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| 185 | * $class and $name, or $default if there are none |
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| 186 | */ |
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| 187 | public function get($class, $name, $default = null) |
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| 194 | |||
| 195 | /** |
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| 196 | * Returns the string that uniquely identifies this variant. The variant is the combination of classes, modules, |
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| 197 | * environment, environment variables and constants that selects which yaml fragments actually make it into the |
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| 198 | * configuration because of "only" |
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| 199 | * and "except" rules. |
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| 200 | * |
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| 201 | * @return string |
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| 202 | */ |
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| 203 | public function variantKey() |
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| 225 | |||
| 226 | /** |
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| 227 | * Completely regenerates the manifest file. Scans through finding all php _config.php and yaml _config/*.ya?ml |
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| 228 | * files,parses the yaml files into fragments, sorts them and figures out what values need to be checked to pick |
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| 229 | * the correct variant. |
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| 230 | * |
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| 231 | * Does _not_ build the actual variant |
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| 232 | * |
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| 233 | * @param bool $includeTests |
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| 234 | * @param bool $cache Cache the result. |
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| 235 | */ |
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| 236 | public function regenerate($includeTests = false, $cache = true) |
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| 269 | |||
| 270 | /** |
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| 271 | * Handle finding a php file. We just keep a record of all php files found, we don't include them |
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| 272 | * at this stage |
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| 273 | * |
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| 274 | * Public so that ManifestFileFinder can call it. Not for general use. |
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| 275 | * |
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| 276 | * @param string $basename |
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| 277 | * @param string $pathname |
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| 278 | * @param int $depth |
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| 279 | */ |
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| 280 | public function addSourceConfigFile($basename, $pathname, $depth) |
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| 286 | |||
| 287 | /** |
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| 288 | * Handle finding a yml file. Parse the file by spliting it into header/fragment pairs, |
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| 289 | * and normalising some of the header values (especially: give anonymous name if none assigned, |
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| 290 | * splt/complete before and after matchers) |
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| 291 | * |
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| 292 | * Public so that ManifestFileFinder can call it. Not for general use. |
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| 293 | * |
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| 294 | * @param string $basename |
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| 295 | * @param string $pathname |
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| 296 | * @param int $depth |
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| 297 | */ |
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| 298 | public function addYAMLConfigFile($basename, $pathname, $depth) |
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| 380 | |||
| 381 | /** |
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| 382 | * Sorts the YAML fragments so that the "before" and "after" rules are met. |
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| 383 | * Throws an error if there's a loop |
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| 384 | * |
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| 385 | * We can't use regular sorts here - we need a topological sort. Easiest |
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| 386 | * way is with a DAG, so build up a DAG based on the before/after rules, then |
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| 387 | * sort that. |
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| 388 | * |
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| 389 | * @return void |
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| 390 | */ |
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| 391 | protected function sortYamlFragments() |
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| 440 | |||
| 441 | /** |
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| 442 | * Return a string "after", "before" or "undefined" depending on whether the YAML fragment array element passed |
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| 443 | * as $a should be positioned after, before, or either compared to the YAML fragment array element passed as $b |
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| 444 | * |
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| 445 | * @param array $a A YAML config fragment as loaded by addYAMLConfigFile |
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| 446 | * @param array $b A YAML config fragment as loaded by addYAMLConfigFile |
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| 447 | * @return string "after", "before" or "undefined" |
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| 448 | */ |
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| 449 | protected function relativeOrder($a, $b) |
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| 506 | |||
| 507 | /** |
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| 508 | * This function filters the loaded yaml fragments, removing any that can't ever have their "only" and "except" |
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| 509 | * rules match. |
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| 510 | * |
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| 511 | * Some tests in "only" and "except" rules need to be checked per request, but some are manifest based - |
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| 512 | * these are invariant over requests and only need checking on manifest rebuild. So we can prefilter these before |
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| 513 | * saving yamlConfigFragments to speed up the process of checking the per-request variant/ |
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| 514 | */ |
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| 515 | public function prefilterYamlFragments() |
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| 537 | |||
| 538 | /** |
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| 539 | * Returns false if the prefilterable parts of the rule aren't met, and true if they are |
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| 540 | * |
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| 541 | * @param $rules array - A hash of rules as allowed in the only or except portion of a config fragment header |
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| 542 | * @return bool - True if the rules are met, false if not. (Note that depending on whether we were passed an |
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| 543 | * only or an except rule, |
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| 544 | * which values means accept or reject a fragment |
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| 545 | */ |
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| 546 | public function matchesPrefilterVariantRules($rules) |
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| 571 | |||
| 572 | /** |
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| 573 | * Builds the variant key spec - the list of values that need to be build to give a key that uniquely identifies |
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| 574 | * this variant. |
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| 575 | */ |
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| 576 | public function buildVariantKeySpec() |
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| 589 | |||
| 590 | /** |
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| 591 | * Adds any variables referenced in the passed rules to the $this->variantKeySpec array |
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| 592 | * |
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| 593 | * @param array $rules |
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| 594 | */ |
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| 595 | public function addVariantKeySpecRules($rules) |
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| 634 | |||
| 635 | /** |
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| 636 | * Calculates which yaml config fragments are applicable in this variant, and merge those all together into |
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| 637 | * the $this->yamlConfig propperty |
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| 638 | * |
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| 639 | * Checks cache and takes care of loading yamlConfigFragments if they aren't already present, but expects |
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| 640 | * $variantKeySpec to already be set |
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| 641 | * |
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| 642 | * @param bool $cache |
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| 643 | */ |
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| 644 | public function buildYamlConfigVariant($cache = true) |
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| 692 | |||
| 693 | /** |
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| 694 | * Returns false if the non-prefilterable parts of the rule aren't met, and true if they are |
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| 695 | * |
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| 696 | * @param array $rules |
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| 697 | * @return bool|string |
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| 698 | */ |
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| 699 | public function matchesVariantRules($rules) |
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| 748 | |||
| 749 | /** |
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| 750 | * Recursively merge a yaml fragment's configuration array into the primary merged configuration array. |
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| 751 | * @param $into |
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| 752 | * @param $fragment |
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| 753 | * @return void |
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| 754 | */ |
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| 755 | public function mergeInYamlFragment(&$into, $fragment) |
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| 763 | } |
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| 764 |
Loading history...
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..