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<?php |
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/** |
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* \AppserverIo\Doppelgaenger\StreamFilters\IntroductionFilter |
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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 Bernhard Wick <[email protected]> |
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* @copyright 2015 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/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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namespace AppserverIo\Doppelgaenger\StreamFilters; |
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/** |
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* This filter will add given interfaces to already defined classes |
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* |
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* @author Bernhard Wick <[email protected]> |
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* @copyright 2015 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/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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class IntroductionFilter extends AbstractFilter |
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{ |
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/** |
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* Order number if filters are used as a stack, higher means below others |
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* |
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* @const integer FILTER_ORDER |
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*/ |
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const FILTER_ORDER = 00; |
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/** |
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* The main filter method. |
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* Implemented according to \php_user_filter class. Will loop over all stream buckets, buffer them and perform |
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* the needed actions. |
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* |
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* @param resource $in Incoming bucket brigade we need to filter |
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* @param resource $out Outgoing bucket brigade with already filtered content |
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* @param integer $consumed The count of altered characters as buckets pass the filter |
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* @param boolean $closing Is the stream about to close? |
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* |
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* @throws \AppserverIo\Doppelgaenger\Exceptions\GeneratorException |
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* |
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* @return integer |
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* |
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* @link http://www.php.net/manual/en/php-user-filter.filter.php |
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*/ |
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public function filter($in, $out, & $consumed, $closing) |
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{ |
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// get all the introductions of a structure definition |
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$introductions = $this->params; |
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// Get our buckets from the stream |
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$interfaceHook = ''; |
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$keywordNeeded = true; |
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while ($bucket = stream_bucket_make_writeable($in)) { |
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// Has to be done only once at the beginning of the definition |
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if (empty($interfaceHook) && $introductions->count() > 0) { |
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// Get the tokens |
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$tokens = token_get_all($bucket->data); |
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// Go through the tokens and check what we found |
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$tokensCount = count($tokens); |
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for ($i = 0; $i < $tokensCount; $i++) { |
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// We need something to hook into, right after class header seems fine |
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if (is_array($tokens[$i]) && $tokens[$i][0] === T_CLASS && $tokens[$i - 1][0] !== T_PAAMAYIM_NEKUDOTAYIM) { |
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for ($j = $i; $j < $tokensCount; $j++) { |
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// If we got the opening bracket we can break |
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if ($tokens[$j] === '{' || $tokens[$j][0] === T_CURLY_OPEN) { |
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break; |
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} |
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if (is_array($tokens[$j])) { |
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// we have to check if there already are interfaces |
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if ($tokens[$j][0] === T_IMPLEMENTS) { |
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$keywordNeeded = false; |
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} |
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$interfaceHook .= $tokens[$j][1]; |
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} else { |
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$interfaceHook .= $tokens[$j]; |
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} |
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} |
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// build up the injected code and make the injection |
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if ($keywordNeeded) { |
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$implementsCode = ' implements '; |
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} else { |
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$implementsCode = ', '; |
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} |
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$useCode = ''; |
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$interfaces = array(); |
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foreach ($introductions as $introduction) { |
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$interfaces[] = $introduction->getInterface(); |
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// build up code for the trait usage |
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$useCode .= 'use ' . $introduction->getImplementation() . '; |
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'; |
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} |
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$implementsCode .= implode(', ', $interfaces); |
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// add the "use" code |
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$bucket->data = str_replace( |
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$interfaceHook . '{', |
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$interfaceHook . '{' . $useCode, |
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$bucket->data |
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); |
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// add the "implements" code |
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$bucket->data = str_replace( |
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$interfaceHook, |
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$interfaceHook . $implementsCode, |
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$bucket->data |
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); |
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} |
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} |
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} |
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// Tell them how much we already processed, and stuff it back into the output |
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$consumed += $bucket->datalen; |
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stream_bucket_append($out, $bucket); |
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} |
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return PSFS_PASS_ON; |
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} |
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/** |
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* Will filter the given params and create a clean array of interface names from them |
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* |
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* @return array |
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*/ |
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protected function filterParams() |
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{ |
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$interfaces = array(); |
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// filter the params |
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if (is_array($this->params)) { |
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$interfaces = $this->params; |
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} else { |
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$interfaces[] = $this->params; |
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} |
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// filter out everything which might not be right |
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foreach ($interfaces as $key => $interfaceCandidate) { |
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if (!is_string($interfaceCandidate)) { |
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unset($interfaces[$key]); |
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} |
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} |
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return $interfaces; |
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} |
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} |
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appserver-io /
doppelgaenger
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