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<?php |
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namespace mindplay\walkway; |
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use Closure; |
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/** |
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* This class represents the root of an independent collection of Routes. |
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* |
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* @see Route |
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*/ |
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class Module extends Route |
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{ |
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/** |
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* A map of regular expression pattern substitutions to apply to every |
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* pattern encountered, as a means fo pre-processing patterns. Provides a |
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* useful means of adding your own custom patterns for convenient reuse. |
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* |
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* @var Closure[] map where full regular expression => substitution closure |
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* |
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* @see $symbols |
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* @see preparePattern() |
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* @see init() |
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*/ |
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public $substitutions = array(); |
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/** |
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* Symbols used by the built-in standard substitution pattern, which provides |
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* a convenient short-hand syntax for placeholder tokens. The built-in standard |
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* symbols are: |
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* |
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* <pre> |
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* 'int' => '\d+' |
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* 'slug' => '[a-z0-9-]+' |
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* </pre> |
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* |
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* Which provides support for simplified named routes, such as: |
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* |
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* <pre> |
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* 'user/<user_id:int>' |
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* 'tags/<tag:slug>' |
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* </pre> |
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* |
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* For which the resulting patterns would be: |
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* |
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* <pre> |
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* 'user/(?<user_id:\d+>)' |
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* 'tags/(?<slug:[a-z0-9-]>)' |
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* </pre> |
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* |
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* @var string[] map where symbol name => partial regular expression |
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* |
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* @see init() |
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*/ |
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public $symbols = array(); |
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/** |
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* @var Closure|null event-handler for diagnostic messages |
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*/ |
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public $onLog = null; |
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/** |
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* @var InvokerInterface |
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*/ |
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public $invoker; |
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/** |
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* @param InvokerInterface|null $invoker optional custom invoker |
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*/ |
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public function __construct(InvokerInterface $invoker = null) |
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{ |
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$this->module = $this; |
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$this->invoker = $invoker ?: $this->createDefaultInvoker(); |
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$this->init(); |
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} |
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/** |
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* Prepares a regular expression pattern by applying the patterns and callbacks |
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* defined by {@link $substitutions} to it. |
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* |
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* @param string $pattern unprocessed pattern |
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* |
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* @return string pre-processed pattern |
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* |
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* @throws RoutingException if the regular expression fails to execute |
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*/ |
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public function preparePattern($pattern) |
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{ |
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foreach ($this->substitutions as $subpattern => $fn) { |
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$pattern = @preg_replace_callback($subpattern, $fn, $pattern); |
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if ($pattern === null) { |
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throw new RoutingException("invalid substitution pattern: {$subpattern}"); |
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} |
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} |
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return $pattern; |
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} |
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/** |
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* Initialize the Module upon construction - override as needed. |
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*/ |
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protected function init() |
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{ |
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$module = $this; |
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$this->vars['route'] = $this; |
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$this->vars['module'] = $this; |
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// define a default pattern-substitution with support for some common symbols: |
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$this->substitutions['/(?<!\(\?)<([^\:]+)\:([^>]+)>/'] = function ($matches) use ($module) { |
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if (isset($module->symbols[$matches[2]])) { |
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$matches[2] = $module->symbols[$matches[2]]; |
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} |
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return "(?<{$matches[1]}>{$matches[2]})"; |
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}; |
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// define common symbols for the default pattern-substitution: |
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$this->symbols = array( |
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'int' => '\d+', |
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'slug' => '[a-z0-9-]+', |
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); |
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} |
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/** |
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* @return InvokerInterface |
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*/ |
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protected function createDefaultInvoker() |
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{ |
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return new Invoker(); |
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} |
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} |
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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..