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<?php
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/**
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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/**
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 * WbLinkAbstract.php
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 *
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 * @category     Core
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 * @package      Core_Interfaces
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 * @subpackage   WbLink outputfilter
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 * @copyright    Manuela v.d.Decken <manuela@isteam.de>
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 * @author       Manuela v.d.Decken <manuela@isteam.de>
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 * @license      http://www.gnu.org/licenses/gpl.html   GPL License
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 * @version      0.0.1
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 * @revision     $Revision: 2070 $
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 * @link         $HeadURL: svn://isteam.dynxs.de/wb-archiv/branches/2.8.x/wb/framework/WbLinkAbstract.php $
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 * @lastmodified $Date: 2014-01-03 02:21:42 +0100 (Fri, 03 Jan 2014) $
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 * @since        File available since 03.11.2013
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 * @description  Interface definition for all addon/ * /WbLink.php
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 */
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abstract class WbLinkAbstract {
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/**
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 * @var object $oDb the active instance of WbDatabase 
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 */
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	protected $oDb    = null;
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/**
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 * @var object $oReg the active instance of WbAdaptor
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 */
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	protected $oReg   = null;
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/**
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 * @var string $sAddon the name of the addon, which extends this class
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 */
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	protected $sAddon = '';
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/**
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 * protected constructor
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 */
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	final public function __construct()
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	{
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		$this->oDb    = WbDatabase::getInstance();
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		$this->oReg   = WbAdaptor::getInstance();
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		$this->sAddon = preg_replace('/^.*?_([^_]+)_[^_]*?$/', '\1', get_class($this));
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	}
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	abstract public function makeLinkFromTag(array $aReplacement);
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	abstract public function &generateOptionsList();
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/**
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 * executeListGeneration
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 * @return array by reference
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 */
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	final protected function &_executeListGeneration()
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	{
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		$aAddonItems = array();
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		//generate news lists
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		$sql = 'SELECT `p`.`'.$this::FIELDNAME_ITEM_ID.'` `ItemId`, `p`.`'.$this::FIELDNAME_PAGE_ID.'` `PageId`, '
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		     .        '`s`.`section_id` `SectionId`, `p`.`'.$this::FIELDNAME_TITLE.'` `Title` '
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		     . 'FROM `'.$this->oDb->TablePrefix.'sections` `s` '
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			 . 'LEFT JOIN `'.$this->oDb->TablePrefix.$this::TABLE_NAME.'` `p` ON `s`.`section_id`= `p`.`'.$this::FIELDNAME_SECTION_ID.'` '
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			 . 'WHERE `s`.`module`=\''.$this->sAddon.'\' '
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		     . ($this::FIELDNAME_ACTIVE != '' ? 'AND `p`.`'.$this::FIELDNAME_ACTIVE.'`>0 ' : '')
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			 . 'ORDER BY `s`.`page_id`, `s`.`section_id`'.($this::FIELDNAME_TIMESTAMP != '' ? ', `p`.`'.$this::FIELDNAME_TIMESTAMP.'` DESC' : '');
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		if (( $oRes = $this->oDb->doQuery($sql))) {
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		// preset group changer flags
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			$iCurrentPage    = 0;
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			$iCurrentSection = 0;
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			$iSectionCounter = 0;
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			while ($aItem = $oRes->fetchRow(MYSQL_ASSOC)) {
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			// iterate all matches
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				if ($iCurrentPage != $aItem['PageId']) {
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				// change group by PageId
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					$iCurrentPage = $aItem['PageId'];
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					$aAddonItems[$iCurrentPage.'P'] = array();
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				}
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				if ($iCurrentSection != $aItem['SectionId']) {
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				// change group by SectionId
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					$iCurrentSection = $aItem['SectionId'];
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					$aAddonItems[$iCurrentPage.'P'][] = array();
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					$iSectionCounter = sizeof($aAddonItems[$iCurrentPage.'P'])-1;
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				}
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				// save current record
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				$aAddonItems[$iCurrentPage.'P'][$iSectionCounter][] = array(
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				    'wblink' => '[wblink'.$aItem['PageId'].'?addon='.$this->sAddon.'&item='.$aItem['ItemId'].']',
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				    'title'  => preg_replace("/\r?\n/", "\\n", $this->oDb->escapeString($aItem['Title']))
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				);
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			}
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		}
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		return $aAddonItems;
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	}
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/**
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 * makeLinkFromTag
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 * @param string $sBasePath
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 * @param array $aReplacement
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 * @return string a valid URL or '#' on error
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 */
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	protected function _makeLinkFromTag($sBasePath, array $aReplacement)
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	{
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	// set link on failure ('#' means, still stay on current page)
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		$sRetval = '#';
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	// search `link` from posts table and create absolute URL
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		$sql = 'SELECT `'.$this::FIELDNAME_LINK.'` '
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			 . 'FROM `'.$this->oDb->TablePrefix.$this::TABLE_NAME.'` '
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			 . 'WHERE `'.$this::FIELDNAME_ITEM_ID.'`='.$aReplacement['item'];
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		if (($sLink = $this->oDb->get_one($sql))) {
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			$sLink     = trim(str_replace('\\', '/', $sLink), '/');
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			$sBasePath = rtrim(str_replace('\\', '/', $sBasePath), '/').'/';
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		// test if valid accessfile is available
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			$sFilePath = $sBasePath.$sLink.$this->oReg->PageExtension;
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			if (is_readable($sFilePath)) {
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				$sRelPath = preg_replace('/^'.preg_quote($this->oReg->AppPath, '/').'/', '', $sFilePath);
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				$sRetval = $this->oReg->AppUrl.$sRelPath.$aReplacement['ancor'];
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			}
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		}
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		return $sRetval;
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	}
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} // end of class WbLinkAbstract
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