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<?php
/* Reminder: always indent with 4 spaces (no tabs). */
// +---------------------------------------------------------------------------+
// | Copyright (c) 2008, Demian Turner |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | o Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | o Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | o The names of the authors may not be used to endorse or promote |
// | products derived from this software without specific prior written |
// | permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
// | |
// +---------------------------------------------------------------------------+
// | Seagull 0.6 |
// +---------------------------------------------------------------------------+
// | BlockLoader.php |
// +---------------------------------------------------------------------------+
// | Author: Demian Turner <demian@phpkitchen.com> |
// +---------------------------------------------------------------------------+
// $Id: BlockLoader.php,v 1.7 2005/05/16 23:55:23 demian Exp $
/**
* BlockLoader manages units of content that can be dynamically positioned in a
* page's left or right columns.
*
* @package SGL
* @author Demian Turner <demian@phpkitchen.com>
* @version $Revision: 1.7 $
* @access public
*/
if (class_exists('SGL_BlockLoader') === false) {
class SGL_BlockLoader
{
/**
* Temporary container for processing blocks.
*
* @access private
* @var array
*/
var $_aData = array();
/**
* Array of processed blocks
*
* Left/right blocks stored as $this->aBlocks['left'],
* $this->aBlocks['right'].
*
* @access public
* @var array
*/
var $aBlocks = array();
/**
* The role id, used so blocks can be cached per role.
*
* @access private
* @var int
*/
var $_rid = 0;
/**
* SectionId is currently roughtly equivalent to page id.
*
* @access private
* @var int
* @todo change to pageId, also rename section table
*/
var $_currentSectionId = 0;
/**
* Constructor - sets the sectionId.
*
* @access public
* @return void
*/
public function SGL_BlockLoader($sectionId)
{
$this->_rid = (int)SGL_Session::get('rid');
if (isset($sectionId)) {
$this->_currentSectionId = $sectionId;
}
}
/**
* Initialises Block Mgr, loads blocks into temporary array
* $_aData for later processing.
*
* @author Andy Crain <apcrain@fuse.net>>
* @access private
* @return array array of block objects
*/
public function render(&$output)
{
// put data generated so far into class scope
$this->output = &$output;
$cache = SGL_Cache::singleton();
$currLang = (isset($output->currLang))
? $output->currLang
: '';
$charset = (isset($output->charset))
? $output->charset
: '';
$cacheId = $this->_currentSectionId . $this->_rid
. $currLang . $charset;
if ($data = $cache->get($cacheId, 'blocks')) {
$this->aBlocks = unserialize($data);
// update uncached blocks
$this->_loadBlocks(false);
SGL::logMessage('blocks from cache', PEAR_LOG_DEBUG);
} else {
$this->_loadBlocks();
$data = serialize($this->aBlocks);
$cache->save($data, $cacheId, 'blocks');
SGL::logMessage('blocks from db', PEAR_LOG_DEBUG);
}
return $this->aBlocks;
}
/**
* Loads blocks from DB.
*
* @access private
* @return void
*/
private function _loadBlocks($getAll = true)
{
$dbh = SGL_DB::singleton();
$addWhere = $getAll ? '' : "AND b.is_cached = 0 ";
$b = SGL_Config::get('table.block');
$ba = SGL_Config::get('table.block_assignment');
$br = SGL_Config::get('table.block_role');
$query = "
SELECT
b.block_id, b.name, b.title, b.title_class,
b.body_class, b.position, b.params, b.is_cached
FROM $b b, $ba ba, $br br
WHERE b.is_enabled = 1 " . $addWhere .
"AND (br.block_id = b.block_id AND
(br.role_id = '" . SGL_Session::getRoleId() . "' OR br.role_id = '" . SGL_ANY_ROLE . "')
)
AND b.block_id = ba.block_id
AND ( ba.section_id = ".SGL_ANY_SECTION." OR ba.section_id = " . $this->_currentSectionId . ' )
ORDER BY b.blk_order
';
$aResult = $dbh->getAll($query);
if (!SGL::isError($aResult)) {
$this->_aData = $aResult;
// render content from each class
$this->_buildBlocks();
} else {
SGL::raiseError('section ID not found', SGL_ERROR_NODATA);
}
}
/**
* With block structures in place, block contents are built.
*
* Each block is a class in the modules/block/classes/blocks directory,
* containing static HTML or dynamic content
*
* @access private
* @return void
*/
private function _buildBlocks()
{
// render content
if (count($this->_aData) > 0 ) {
foreach ($this->_aData as $index => $oBlock) {
$blockClass = $oBlock->name;
preg_match('/^(.*)_.*_(.*)$/', $blockClass, $aMatches);
@$blockPath = strtolower($aMatches[1]) . '/blocks/' . $aMatches[2];
// load CMS blocks if installed
if (SGL::moduleIsEnabled('cms') && $blockPath == 'navigation/blocks/Navigation') {
$blockPath = 'cms/blocks/Navigation';
$blockClass = 'Cms_Block_Navigation';
}
if (file_exists( SGL_MOD_DIR . '/' . $blockPath . '.php')) {
require_once SGL_MOD_DIR . '/' . $blockPath . '.php';
} else {
unset($this->_aData[$index]);
SGL::raiseError('cannot load ' . $blockClass . '; '
. $blockPath . '.php does not exist', SGL_ERROR_NOFILE);
}
if (!class_exists($blockClass)) {
unset($this->_aData[$index]);
SGL::raiseError($blockClass . ' is not a valid block classname',
SGL_ERROR_NOCLASS);
} else {
if (is_scalar($aParams = @unserialize($oBlock->params))) {
$aParams = array();
}
@$obj = new $blockClass();
///fix PHP 5.3
@$obj = &$obj;
if ($data = $obj->init($this->output, $oBlock->block_id, $aParams)) {
$this->_aData[$index]->content = $data;
} else {
// remove the whole block if a false is captured
unset($this->_aData[$index]);
}
}
}
$this->_sort();
}
}
/**
* Sorts tmp array $_aData into order within block positions.
*
* easier to manage in Controller
*
* @access private
* @return void
*/
public function _sort()
{
if (count($this->_aData) > 0) {
foreach ($this->_aData as $oBlock) {
$this->aBlocks[$oBlock->position][$oBlock->block_id] = $oBlock;
}
}
unset($this->_aData);
}
}
}
?>
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