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<?php |
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namespace JK\Sam\Task; |
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use Exception; |
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use JK\Sam\File\Locator; |
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use JK\Sam\Filter\FilterInterface; |
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use SplFileInfo; |
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class TaskRunner |
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{ |
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/** |
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* @var FilterInterface[] |
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*/ |
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protected $filters; |
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/** |
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* @var Locator |
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*/ |
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protected $locator; |
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/** |
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* TaskRunner constructor. |
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* |
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* @param FilterInterface[] $filters |
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* @param Locator $locator |
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*/ |
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public function __construct(array $filters, Locator $locator) |
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{ |
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$this->filters = $filters; |
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$this->locator = $locator; |
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} |
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/** |
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* Run a task, load its sources before and call the clean method on the filter. |
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* |
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* @param Task $task |
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* @throws Exception |
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*/ |
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public function run(Task $task) |
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{ |
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// get configured filters for this task |
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$filters = $task |
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->getConfiguration() |
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->getParameter('filters'); |
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// get sources files |
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$sources = $this->fetchSources($task); |
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$destinations = $this->fetchDestinations($task); |
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foreach ($filters as $filterName) { |
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// get current configured filter |
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$filter = $this->getFilter($filterName); |
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// filter the files supported by this filter |
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$filteredSources = $this->filterSources($sources, $filter); |
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// apply the filter |
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$updatedSources = $filter->run($filteredSources, $destinations); |
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if ($updatedSources === null) { |
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$updatedSources = []; |
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} |
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// clean the generated files by the filter |
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$filter->clean(); |
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// update new sources |
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$sources = $this->updateSources($sources, $filteredSources, $updatedSources); |
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} |
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} |
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/** |
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* Return a filter by its name. Throw an exception if it is not exists. |
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* |
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* @param string $name |
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* @return FilterInterface |
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* @throws Exception |
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*/ |
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protected function getFilter($name) |
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{ |
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// filters must exists in configured filters |
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if (!array_key_exists($name, $this->filters)) { |
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throw new Exception('Invalid filter '.$name.'. Check your mapping configuration'); |
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} |
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return $this->filters[$name]; |
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} |
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/** |
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* Fetch the source files from the task and return and array of SplInfo. |
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* |
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* @param Task $task |
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* @return array |
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*/ |
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protected function fetchSources(Task $task) |
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{ |
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$sources = []; |
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foreach ($task->getSources() as $source) { |
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// locate new resource and merge them to the existing sources |
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$sources = array_merge($sources, $this->locator->locate($source)); |
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} |
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return $sources; |
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} |
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/** |
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* Fetch the destination files from the task and return and array of SplInfo. |
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* |
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* @param Task $task |
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* @return SplFileInfo[] |
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*/ |
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protected function fetchDestinations(Task $task) |
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{ |
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$sources = []; |
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foreach ($task->getDestinations() as $source) { |
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// locate new resource and merge them to the existing sources |
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$sources[] = new SplFileInfo($source); |
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} |
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return $sources; |
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} |
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/** |
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* Filter only the sources supported by the current filter. |
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* |
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* @param SplFileInfo[] $sources |
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* @param FilterInterface $filter |
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* @return array |
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* @throws Exception |
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*/ |
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protected function filterSources(array $sources, FilterInterface $filter) |
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{ |
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$filteredSources = []; |
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// if the filter supports no extension, there is an error |
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if (!is_array($filter->getSupportedExtensions()) || !count($filter->getSupportedExtensions())) { |
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throw new Exception('No supported extensions found for the filter '.$filter->getName()); |
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} |
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// if the filter support all the files types, no need to filter |
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if (in_array('*', $filter->getSupportedExtensions())) { |
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return $sources; |
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} |
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foreach ($sources as $source) { |
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if (in_array($source->getExtension(), $filter->getSupportedExtensions())) { |
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$filteredSources[] = $source; |
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} |
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} |
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return $filteredSources; |
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} |
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/** |
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* Remove the filtered files from the sources, and merge with the new ones. |
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* |
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* @param SplFileInfo[] $originalSources |
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* @param SplFileInfo[] $filteredSources |
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* @param SplFileInfo[] $updatedSources |
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* @return SplFileInfo[] |
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* @throws Exception |
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*/ |
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protected function updateSources(array $originalSources, array $filteredSources, array $updatedSources) |
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{ |
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$sources = []; |
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// keep only the not filtered files |
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foreach ($originalSources as $source) { |
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if (!in_array($source, $filteredSources)) { |
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$sources[] = $source; |
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} |
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} |
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// check updated files |
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foreach ($updatedSources as $index => $source) { |
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if (is_string($source)) { |
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$updatedSources[$index] = new SplFileInfo($source); |
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} else if (!($source instanceof SplFileInfo)) { |
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throw new Exception('Invalid source file type '.gettype($source)); |
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} |
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} |
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// merge with the new sources |
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$sources = array_merge($sources, $updatedSources); |
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return $sources; |
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} |
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} |
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johnkrovitch /
Sam
