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<?php
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/*
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* @param string $content : contains the full content of the current page
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* @return string
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* @description replace all "[wblink{page_id}{?addon=n&item=n...}]" with real links to accessfiles<br />
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* All modules must offer the class 'WbLink'(implementing 'WbLinkAbstract'), to be taken into consideration.
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*/
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function doFilterWbLink($sContent)
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{
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$oDb = WbDatabase::getInstance();
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$oReg = WbAdaptor::getInstance();
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$aReplaceList = array();
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$sPattern = '/\[wblink([0-9]+)\??([^\]]*)\]/is';
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if(preg_match_all($sPattern,$sContent,$aMatches))
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{
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// iterate through all found matches
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foreach($aMatches[0] as $iKey => $sKeyString )
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{
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$aReplaceList[$sKeyString] = array();
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// use original Tag to save PageId
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$aReplaceList[$sKeyString]['PageId'] = $aMatches[1][$iKey];
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// if there are additional arguments given
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if($aMatches[2][$iKey])
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{
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$aReplaceList[$sKeyString]['Args'] = array();
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$aArgs = explode('&', $aMatches[2][$iKey]);
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foreach($aArgs as $sArgument)
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{
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$aTmp = explode('=', $sArgument);
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$aReplaceList[$sKeyString]['Args'][$aTmp[0]] = $aTmp[1];
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}
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}
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}
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if(sizeof($aReplaceList) > 0)
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{ // iterate list if replacements are available
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foreach($aReplaceList as $sKey => $aReplacement)
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{
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// set link on failure ('#' means, still stay on current page)
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$aReplaceList[$sKey] = '#';
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// handle normal pages links
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if(!isset($aReplacement['Args']))
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{
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// read corresponding link from table 'pages'
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$sql = 'SELECT `link` FROM `'.$oDb->TablePrefix.'pages` WHERE `page_id` = '.(int)$aReplacement['PageId'];
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if(($sLink = $oDb->get_one($sql)))
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{
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$sLink = trim(str_replace('\\', '/', $sLink), '/');
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// test if valid accessfile is available
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if(is_readable($oReg->AppPath.$oReg->PagesDir.$sLink.$oReg->PageExtension))
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{
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// create absolute URL
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$aReplaceList[$sKey] = $oReg->AppUrl.$oReg->PagesDir.$sLink.$oReg->PageExtension;
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}
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}
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// handle links of modules
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}else
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{
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// build name of the needed class
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$sClass = 'm_'.$aReplacement['Args']['addon'].'_WbLink';
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// remove addon name from replacement array
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unset($aReplacement['Args']['addon']);
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if(class_exists($sClass))
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{
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// instantiate class
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$oWbLink = new $sClass();
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// the class must implement the interface
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if($oWbLink instanceof WbLinkAbstract)
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{
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// create real link from replacement data
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$aReplaceList[$sKey] = $oWbLink->makeLinkFromTag($aReplacement);
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}
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}
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}
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}
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// extract indexes into a new array
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$aSearchList = array_keys($aReplaceList);
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// replace all identified wblink-tags in content
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$sContent = str_replace($aSearchList, $aReplaceList, $sContent);
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}
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}
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return $sContent;
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}
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