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<?php |
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/** |
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* TechDivision\Import\Subjects\FileResolver\BunchFileResolver |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2016 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/techdivision/import |
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* @link http://www.techdivision.com |
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*/ |
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namespace TechDivision\Import\Subjects\FileResolver; |
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use TechDivision\Import\Utils\BunchKeys; |
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use TechDivision\Import\Exceptions\LineNotFoundException; |
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use TechDivision\Import\Exceptions\MissingOkFileException; |
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/** |
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* Plugin that processes the subjects. |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2016 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/techdivision/import |
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* @link http://www.techdivision.com |
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*/ |
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class SimpleFileResolver extends AbstractFileResolver |
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{ |
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/** |
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* The regular expression used to load the files with. |
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* |
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* @var string |
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*/ |
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private $regex = '/^.*\/%s\\.%s$/'; |
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/** |
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* The matches for the last processed CSV filename. |
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* |
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* @var array |
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*/ |
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private $matches = array(); |
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/** |
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* Returns the regular expression used to load the files with. |
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* |
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* @return string The regular expression |
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*/ |
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protected function getRegex() |
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{ |
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return $this->regex; |
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} |
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/** |
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* Returns the number of matches found. |
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* |
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* @return integer The number of matches |
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*/ |
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protected function countMatches() |
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{ |
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return sizeof($this->matches); |
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} |
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/** |
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* Adds the passed match to the array with the matches. |
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* |
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* @param string $name The name of the match |
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* @param string $match The match itself |
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* |
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* @return void |
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*/ |
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protected function addMatch($name, $match) |
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{ |
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$this->matches[strtolower($name)] = $match; |
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} |
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/** |
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* Returns the match with the passed name. |
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* |
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* @param string $name The name of the match to return |
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* |
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* @return string|null The match itself |
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*/ |
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protected function getMatch($name) |
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{ |
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if (isset($this->matches[$name])) { |
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return $this->matches[$name]; |
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} |
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} |
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/** |
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* Returns the elements the filenames consists of, converted to lowercase. |
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* |
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* @return array The array with the filename elements |
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*/ |
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protected function getPatternKeys() |
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{ |
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// load the pattern keys from the configuration |
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$patternKeys = $this->getPatternElements(); |
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// make sure that they are all lowercase |
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array_walk($patternKeys, function (&$value) { |
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$value = strtolower($value); |
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}); |
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// return the pattern keys |
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return $patternKeys; |
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} |
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/** |
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* Remove's the passed line from the file with the passed name. |
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* |
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* @param string $line The line to be removed |
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* @param string $filename The name of the file the line has to be removed |
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* |
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* @return void |
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* @throws \Exception Is thrown, if the file doesn't exists, the line is not found or can not be removed |
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*/ |
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protected function removeLineFromFile($line, $filename) |
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{ |
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$this->getApplication()->removeLineFromFile($line, $filename); |
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} |
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/** |
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* Returns the values to create the regex pattern from. |
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* |
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* @return array The array with the pattern values |
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*/ |
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protected function resolvePatternValues() |
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{ |
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// initialize the array |
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$elements = array(); |
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// prepare the pattern values |
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foreach ($this->getPatternKeys() as $element) { |
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$elements[] = sprintf('(?<%s>%s)', $element, $this->resolvePatternValue($element)); |
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} |
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// return the pattern values |
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return $elements; |
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} |
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/** |
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* Resolves the pattern value for the given element name. |
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* |
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* @param string $element The element name to resolve the pattern value for |
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* |
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* @return string|null The resolved pattern value |
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*/ |
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protected function resolvePatternValue($element) |
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{ |
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// query whether or not matches has been found OR the counter element has been passed |
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if ($this->countMatches() === 0 || BunchKeys::COUNTER === $element) { |
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// prepare the method name for the callback to load the pattern value with |
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$methodName = sprintf('get%s', ucfirst($element)); |
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// load the pattern value |
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if (in_array($methodName, get_class_methods($this->getFileResolverConfiguration()))) { |
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return call_user_func(array($this->getFileResolverConfiguration(), $methodName)); |
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} |
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// stop processing |
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return; |
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} |
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// try to load the pattern value from the matches |
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return $this->getMatch($element); |
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} |
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/** |
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* Prepares and returns the pattern for the regex to load the files from the |
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* source directory for the passed subject. |
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* |
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* @return string The prepared regex pattern |
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*/ |
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protected function preparePattern() |
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{ |
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return sprintf($this->getRegex(), implode($this->getElementSeparator(), $this->resolvePatternValues()), $this->getSuffix()); |
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} |
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/** |
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* Prepares and returns an OK filename from the passed parts. |
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* |
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* @param array $parts The parts to concatenate the OK filename from |
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* |
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* @return string The OK filename |
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*/ |
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protected function prepareOkFilename(array $parts) |
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{ |
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return sprintf('%s/%s.%s', $this->getSourceDir(), implode($this->getElementSeparator(), $parts), $this->getOkFileSuffix()); |
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} |
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/** |
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* Query whether or not the basename, without suffix, of the passed filenames are equal. |
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* |
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* @param string $filename1 The first filename to compare |
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* @param string $filename2 The second filename to compare |
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* |
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* @return boolean TRUE if the passed files basename are equal, else FALSE |
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*/ |
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protected function isEqualFilename($filename1, $filename2) |
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{ |
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return $this->stripSuffix($filename1, $this->getSuffix()) === $this->stripSuffix($filename2, $this->getOkFileSuffix()); |
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} |
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/** |
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* Strips the passed suffix, including the (.), from the filename and returns it. |
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* |
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* @param string $filename The filename to return the suffix from |
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* @param string $suffix The suffix to return |
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* |
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* @return string The filname without the suffix |
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*/ |
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protected function stripSuffix($filename, $suffix) |
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{ |
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return basename($filename, sprintf('.%s', $suffix)); |
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} |
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/** |
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* Return's an array with the names of the expected OK files for the actual subject. |
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* |
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* @return array The array with the expected OK filenames |
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*/ |
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protected function getOkFilenames() |
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{ |
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// initialize the array for the available okFilenames |
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$okFilenames = array(); |
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// prepare the OK filenames based on the found CSV file information |
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for ($i = 1; $i <= sizeof($patternKeys = $this->getPatternKeys()); $i++) { |
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// intialize the array for the parts of the names (prefix, filename + counter) |
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$parts = array(); |
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// load the parts from the matches |
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for ($z = 0; $z < $i; $z++) { |
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// append the part |
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$parts[] = $this->getMatch($patternKeys[$z]); |
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} |
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// query whether or not, the OK file exists, if yes append it |
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if (file_exists($okFilename = $this->prepareOkFilename($parts))) { |
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$okFilenames[] = $okFilename; |
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} |
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} |
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// prepare and return the pattern for the OK file |
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return $okFilenames; |
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} |
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/** |
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* Resets the file resolver to parse another source directory for new files. |
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* |
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* @return void |
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*/ |
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public function reset() |
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{ |
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$this->matches = array(); |
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} |
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/** |
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* Returns the matches. |
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* |
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* @return array The array with the matches |
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*/ |
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public function getMatches() |
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{ |
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return array_merge(array(BunchKeys::FILENAME => date('Ymd-His'), BunchKeys::COUNTER => 1), $this->matches); |
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} |
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/** |
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* Queries whether or not, the passed filename should be handled by the subject. |
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* |
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* @param string $filename The filename to query for |
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* |
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* @return boolean TRUE if the file should be handled, else FALSE |
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*/ |
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public function shouldBeHandled($filename) |
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{ |
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// initialize the array with the matches |
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$matches = array(); |
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// update the matches, if the pattern matches |
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if ($result = preg_match($this->preparePattern(), $filename, $matches)) { |
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foreach ($matches as $name => $match) { |
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$this->addMatch($name, $match); |
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} |
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} |
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// stop processing, if the filename doesn't match |
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return (boolean) $result; |
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} |
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/** |
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* Query whether or not, the passed CSV filename is in the OK file. If the filename was found, |
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* the OK file will be cleaned-up. |
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* |
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* @param string $filename The filename to be cleaned-up |
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* |
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* @return void |
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* @throws \Exception Is thrown, if the passed filename is NOT in the OK file or the OK can not be cleaned-up |
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*/ |
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public function cleanUpOkFile($filename) |
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{ |
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// query whether or not the subject needs an OK file, if yes remove the filename from the file |
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if ($this->getSubjectConfiguration()->isOkFileNeeded() === false) { |
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return; |
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} |
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try { |
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// try to load the expected OK filenames |
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if (sizeof($okFilenames = $this->getOkFilenames()) === 0) { |
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throw new MissingOkFileException(sprintf('Can\'t find a OK filename for file %s', $filename)); |
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} |
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// iterate over the found OK filenames (should usually be only one, but could be more) |
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foreach ($okFilenames as $okFilename) { |
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// if the OK filename matches the CSV filename AND the OK file is empty |
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if ($this->isEqualFilename($filename, $okFilename) && filesize($okFilename) === 0) { |
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unlink($okFilename); |
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return; |
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} |
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// else, remove the CSV filename from the OK file |
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$this->removeLineFromFile(basename($filename), $fh = fopen($okFilename, 'r+')); |
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fclose($fh); |
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// if the OK file is empty, delete the file |
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if (filesize($okFilename) === 0) { |
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unlink($okFilename); |
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} |
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// return immediately |
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return; |
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} |
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// throw an exception if either no OK file has been found, |
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// or the CSV file is not in one of the OK files |
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throw new \Exception( |
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sprintf( |
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'Can\'t found filename %s in one of the expected OK files: %s', |
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$filename, |
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implode(', ', $okFilenames) |
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) |
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); |
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} catch (LineNotFoundException $lne) { |
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// wrap and re-throw the exception |
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throw new \Exception( |
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sprintf( |
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'Can\'t remove filename %s from OK file: %s', |
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$filename, |
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$okFilename |
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), |
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null, |
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$lne |
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); |
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} |
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} |
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} |
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If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: