nextcloud /
server
| Total Complexity | 41 |
| Total Lines | 324 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like RegistrationContext 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.
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 RegistrationContext, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 37 | class RegistrationContext { |
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| 38 | |||
| 39 | /** @var array[] */ |
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| 40 | private $capabilities = []; |
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| 41 | |||
| 42 | /** @var array[] */ |
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| 43 | private $crashReporters = []; |
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| 44 | |||
| 45 | /** @var array[] */ |
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| 46 | private $services = []; |
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| 47 | |||
| 48 | /** @var array[] */ |
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| 49 | private $aliases = []; |
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| 50 | |||
| 51 | /** @var array[] */ |
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| 52 | private $parameters = []; |
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| 53 | |||
| 54 | /** @var array[] */ |
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| 55 | private $eventListeners = []; |
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| 56 | |||
| 57 | /** @var array[] */ |
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| 58 | private $middlewares = []; |
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| 59 | |||
| 60 | /** @var array[] */ |
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| 61 | private $searchProviders = []; |
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| 62 | |||
| 63 | /** @var ILogger */ |
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| 64 | private $logger; |
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| 65 | |||
| 66 | public function __construct(ILogger $logger) { |
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| 68 | } |
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| 69 | |||
| 70 | public function for(string $appId): IRegistrationContext { |
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| 71 | return new class($appId, $this) implements IRegistrationContext { |
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| 72 | /** @var string */ |
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| 73 | private $appId; |
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| 74 | |||
| 75 | /** @var RegistrationContext */ |
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| 76 | private $context; |
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| 77 | |||
| 78 | public function __construct(string $appId, RegistrationContext $context) { |
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| 79 | $this->appId = $appId; |
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| 80 | $this->context = $context; |
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| 81 | } |
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| 82 | |||
| 83 | public function registerCapability(string $capability): void { |
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| 84 | $this->context->registerCapability( |
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| 85 | $this->appId, |
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| 86 | $capability |
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| 87 | ); |
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| 88 | } |
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| 89 | |||
| 90 | public function registerCrashReporter(string $reporterClass): void { |
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| 91 | $this->context->registerCrashReporter( |
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| 92 | $this->appId, |
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| 93 | $reporterClass |
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| 94 | ); |
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| 95 | } |
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| 96 | |||
| 97 | public function registerService(string $name, callable $factory, bool $shared = true): void { |
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| 98 | $this->context->registerService( |
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| 99 | $this->appId, |
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| 100 | $name, |
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| 101 | $factory, |
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| 102 | $shared |
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| 103 | ); |
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| 104 | } |
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| 105 | |||
| 106 | public function registerServiceAlias(string $alias, string $target): void { |
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| 107 | $this->context->registerServiceAlias( |
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| 108 | $this->appId, |
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| 109 | $alias, |
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| 110 | $target |
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| 111 | ); |
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| 112 | } |
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| 113 | |||
| 114 | public function registerParameter(string $name, $value): void { |
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| 115 | $this->context->registerParameter( |
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| 116 | $this->appId, |
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| 117 | $name, |
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| 118 | $value |
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| 119 | ); |
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| 120 | } |
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| 121 | |||
| 122 | public function registerEventListener(string $event, string $listener, int $priority = 0): void { |
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| 123 | $this->context->registerEventListener( |
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| 124 | $this->appId, |
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| 125 | $event, |
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| 126 | $listener, |
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| 127 | $priority |
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| 128 | ); |
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| 129 | } |
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| 130 | |||
| 131 | public function registerMiddleware(string $class): void { |
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| 132 | $this->context->registerMiddleware( |
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| 133 | $this->appId, |
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| 134 | $class |
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| 135 | ); |
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| 136 | } |
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| 137 | |||
| 138 | public function registerSearchProvider(string $class): void { |
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| 139 | $this->context->registerSearchProvider( |
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| 140 | $this->appId, |
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| 141 | $class |
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| 142 | ); |
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| 143 | } |
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| 144 | }; |
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| 145 | } |
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| 146 | |||
| 147 | public function registerCapability(string $appId, string $capability): void { |
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| 151 | ]; |
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| 152 | } |
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| 153 | |||
| 154 | public function registerCrashReporter(string $appId, string $reporterClass): void { |
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| 155 | $this->crashReporters[] = [ |
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| 156 | 'appId' => $appId, |
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| 157 | 'class' => $reporterClass, |
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| 158 | ]; |
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| 159 | } |
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| 160 | |||
| 161 | public function registerService(string $appId, string $name, callable $factory, bool $shared = true): void { |
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| 162 | $this->services[] = [ |
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| 163 | "appId" => $appId, |
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| 164 | "name" => $name, |
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| 165 | "factory" => $factory, |
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| 166 | "sharred" => $shared, |
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| 167 | ]; |
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| 168 | } |
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| 169 | |||
| 170 | public function registerServiceAlias(string $appId, string $alias, string $target): void { |
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| 175 | ]; |
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| 176 | } |
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| 177 | |||
| 178 | public function registerParameter(string $appId, string $name, $value): void { |
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| 179 | $this->parameters[] = [ |
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| 180 | "appId" => $appId, |
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| 181 | "name" => $name, |
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| 182 | "value" => $value, |
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| 183 | ]; |
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| 184 | } |
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| 185 | |||
| 186 | public function registerEventListener(string $appId, string $event, string $listener, int $priority = 0): void { |
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| 187 | $this->eventListeners[] = [ |
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| 188 | "appId" => $appId, |
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| 189 | "event" => $event, |
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| 190 | "listener" => $listener, |
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| 191 | "priority" => $priority, |
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| 192 | ]; |
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| 193 | } |
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| 194 | |||
| 195 | public function registerMiddleware(string $appId, string $class): void { |
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| 196 | $this->middlewares[] = [ |
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| 197 | "appId" => $appId, |
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| 198 | "class" => $class, |
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| 199 | ]; |
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| 200 | } |
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| 201 | |||
| 202 | public function registerSearchProvider(string $appId, string $class) { |
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| 203 | $this->searchProviders[] = [ |
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| 204 | 'appId' => $appId, |
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| 205 | 'class' => $class, |
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| 206 | ]; |
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| 207 | } |
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| 208 | |||
| 209 | /** |
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| 210 | * @param App[] $apps |
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| 211 | */ |
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| 212 | public function delegateCapabilityRegistrations(array $apps): void { |
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| 213 | foreach ($this->capabilities as $registration) { |
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| 214 | try { |
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| 215 | $apps[$registration['appId']] |
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| 216 | ->getContainer() |
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| 217 | ->registerCapability($registration['capability']); |
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| 218 | } catch (Throwable $e) { |
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| 219 | $appId = $registration['appId']; |
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| 220 | $this->logger->logException($e, [ |
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| 221 | 'message' => "Error during capability registration of $appId: " . $e->getMessage(), |
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| 222 | 'level' => ILogger::ERROR, |
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| 223 | ]); |
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| 224 | } |
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| 225 | } |
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| 226 | } |
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| 227 | |||
| 228 | /** |
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| 229 | * @param App[] $apps |
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| 230 | */ |
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| 231 | public function delegateCrashReporterRegistrations(array $apps, Registry $registry): void { |
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| 232 | foreach ($this->crashReporters as $registration) { |
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| 233 | try { |
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| 234 | $registry->registerLazy($registration['class']); |
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| 235 | } catch (Throwable $e) { |
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| 236 | $appId = $registration['appId']; |
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| 237 | $this->logger->logException($e, [ |
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| 238 | 'message' => "Error during crash reporter registration of $appId: " . $e->getMessage(), |
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| 239 | 'level' => ILogger::ERROR, |
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| 240 | ]); |
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| 241 | } |
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| 242 | } |
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| 243 | } |
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| 244 | |||
| 245 | public function delegateEventListenerRegistrations(IEventDispatcher $eventDispatcher): void { |
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| 246 | foreach ($this->eventListeners as $registration) { |
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| 247 | try { |
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| 248 | if (isset($registration['priority'])) { |
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| 249 | $eventDispatcher->addServiceListener( |
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| 250 | $registration['event'], |
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| 251 | $registration['listener'], |
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| 252 | $registration['priority'] |
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| 253 | ); |
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| 254 | } else { |
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| 255 | $eventDispatcher->addServiceListener( |
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| 256 | $registration['event'], |
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| 257 | $registration['listener'] |
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| 258 | ); |
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| 259 | } |
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| 260 | } catch (Throwable $e) { |
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| 261 | $appId = $registration['appId']; |
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| 262 | $this->logger->logException($e, [ |
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| 263 | 'message' => "Error during event listener registration of $appId: " . $e->getMessage(), |
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| 264 | 'level' => ILogger::ERROR, |
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| 265 | ]); |
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| 266 | } |
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| 267 | } |
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| 268 | } |
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| 269 | |||
| 270 | /** |
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| 271 | * @param App[] $apps |
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| 272 | */ |
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| 273 | public function delegateContainerRegistrations(array $apps): void { |
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| 274 | foreach ($this->services as $registration) { |
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| 275 | try { |
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| 276 | /** |
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| 277 | * Register the service and convert the callable into a \Closure if necessary |
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| 278 | */ |
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| 279 | $apps[$registration['appId']] |
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| 280 | ->getContainer() |
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| 281 | ->registerService( |
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| 282 | $registration['name'], |
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| 283 | Closure::fromCallable($registration['factory']), |
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| 284 | $registration['shared'] ?? true |
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| 285 | ); |
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| 286 | } catch (Throwable $e) { |
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| 287 | $appId = $registration['appId']; |
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| 288 | $this->logger->logException($e, [ |
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| 289 | 'message' => "Error during service registration of $appId: " . $e->getMessage(), |
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| 290 | 'level' => ILogger::ERROR, |
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| 291 | ]); |
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| 292 | } |
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| 293 | } |
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| 294 | |||
| 295 | foreach ($this->aliases as $registration) { |
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| 296 | try { |
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| 297 | $apps[$registration['appId']] |
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| 298 | ->getContainer() |
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| 299 | ->registerAlias( |
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| 300 | $registration['alias'], |
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| 301 | $registration['target'] |
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| 302 | ); |
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| 303 | } catch (Throwable $e) { |
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| 304 | $appId = $registration['appId']; |
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| 305 | $this->logger->logException($e, [ |
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| 306 | 'message' => "Error during service alias registration of $appId: " . $e->getMessage(), |
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| 307 | 'level' => ILogger::ERROR, |
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| 308 | ]); |
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| 309 | } |
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| 310 | } |
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| 311 | |||
| 312 | foreach ($this->parameters as $registration) { |
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| 313 | try { |
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| 314 | $apps[$registration['appId']] |
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| 315 | ->getContainer() |
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| 316 | ->registerParameter( |
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| 317 | $registration['name'], |
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| 318 | $registration['value'] |
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| 319 | ); |
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| 320 | } catch (Throwable $e) { |
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| 321 | $appId = $registration['appId']; |
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| 322 | $this->logger->logException($e, [ |
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| 323 | 'message' => "Error during service alias registration of $appId: " . $e->getMessage(), |
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| 324 | 'level' => ILogger::ERROR, |
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| 325 | ]); |
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| 326 | } |
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| 327 | } |
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| 328 | } |
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| 329 | |||
| 330 | /** |
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| 331 | * @param App[] $apps |
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| 332 | */ |
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| 333 | public function delegateMiddlewareRegistrations(array $apps): void { |
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| 344 | ]); |
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| 345 | } |
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| 346 | } |
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| 347 | } |
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| 348 | |||
| 349 | /** |
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| 350 | * @param App[] $apps |
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| 351 | */ |
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| 352 | public function delegateSearchProviderRegistration(array $apps, SearchComposer $searchComposer): void { |
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| 361 | ]); |
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| 362 | } |
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| 363 | } |
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| 364 | } |
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| 365 | } |
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| 366 |
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.