/**
* updates the internal link ADA-html internal link tag with the new node id to ling to.
* e.g. <LINK TYPE="INTERNAL" VALUE="8"> will be converted in <LINK TYPE="INTERNAL" VALUE="NEWID">
*
* @param int $courseNewID
*
* @access private
*/
private function _updateInternalLinksInNodes($courseNewID)
{
$this->_logMessage(__METHOD__ . ' Updating nodes that have an internal link');
$this->_logMessage(__METHOD__ . ' Timestamp used to select node to update is: ' . $this->_importStartTime);
$nodesToUpdate = $this->_dh->get_nodes_with_internal_link_for_course($courseNewID, $this->_importStartTime);
if (!AMA_DB::isError($nodesToUpdate)) {
$this->_logMessage(__METHOD__ . " Candidates for updating: \n" . print_r($nodesToUpdate, true));
$this->_logMessage(__METHOD__ . " This is the replacement NODE ids array \n" . print_r($this->_courseNodeIDMapping, true));
/**
* build up source and replacements array
* replacements are going to have a random string as
* a fake attribute to prevent cyclic substitutions
* e.g. if we have in text:
*
* blablabla... value='1'.... blablabla.... value='7'...blablabla value='1'...
*
* and in the mapping array: 1=>7 .... 7=>23....
*
* the result will be that all 1 become 7, and all 7 become 23 and at the and
* all of the three links will point to 23.
*/
$randomStr = '#' . substr(md5(time()), 0, 8);
$prefix = '<LINK TYPE="INTERNAL" VALUE="';
$suffix = '">';
$suffix2 = '"' . $randomStr . '>';
$search = array();
$replace = array();
foreach ($this->_courseNodeIDMapping as $oldID => $newID) {
$oldID = str_replace($this->_courseOldID . self::$courseSeparator, '', $oldID);
$newID = str_replace($courseNewID . self::$courseSeparator, '', $newID);
$search[] = $prefix . $oldID . $suffix;
$replace[] = $prefix . $newID . $suffix2;
}
foreach ($nodesToUpdate as $arrElem) {
foreach ($arrElem as $nodeID) {
$this->_logMessage(__METHOD__ . ' UPDATING NODE id=' . $nodeID);
$nodeInfo = $this->_dh->get_node_info($nodeID);
$nodeInfo['text'] = str_ireplace($search, $replace, $nodeInfo['text']);
// strip off the random fake attribute
$nodeInfo['text'] = str_ireplace($randomStr, '', $nodeInfo['text']);
$this->_dh->set_node_text($nodeID, $nodeInfo['text']);
}
}
}
}
