/**
* This method is indirectly called by WP if one edits
* an article in the WP clone. It starts and controls the
* merge process and returns its result.
*
* @param $title
* @param $newWPText
* @param $currentUPText
* @return unknown_type
*/
public function merge($title, $newWPText, $currentUPText)
{
wfProfileIn('WUMMergeController->merge');
if ($this->checkIgnoreNewWPVersion($currentUPText)) {
return $currentUPText;
}
$overwrite = $this->checkOverwriteUPVersion($newWPText);
if ($overwrite !== false) {
return $overwrite;
}
//get the last WP version
$originalWPText = $this->getOriginalWPText($title);
$newWPText = $this->prepareText($newWPText);
$originalWPText = $this->prepareText($originalWPText);
$currentUPText = $this->prepareText($currentUPText);
if (strlen($originalWPText) == 0) {
return $newWPText . "\n" . $currentUPText;
}
//check whether to use the table based merger
global $wumUseTableBasedMerger;
if ($wumUseTableBasedMerger) {
$tbm = WUMTableBasedMerger::getInstance();
list($newWPText, $currentUPText, $originalWPText) = $tbm->merge($title, $newWPText, $currentUPText, $originalWPText);
//wfProfileOut('WUMMergeController->merge');
//return $currentUPText;
}
//do three way merge
$twmResult = WUMThreeWayBasedMerger::getInstance()->merge($originalWPText, $newWPText, $currentUPText);
//do section based merge if merge faults occured during three way merge
if (count($twmResult['mergeFaults']) == 0) {
$text = $twmResult['mergedText'];
} else {
$text = WUMSectionBasedMerger::getInstance()->merge($originalWPText, $newWPText, $currentUPText, $twmResult['mergedText'], $twmResult['mergeFaults']);
}
//finalize merge result, i.e. replace temporary characters
$text = WUMThreeWayBasedMerger::getInstance()->finalizeMergeResult($text);
wfProfileOut('WUMMergeController->merge');
return $text;
}
/**
* singleton
*
* @return WUMTableBasedMerger
*/
public static function getInstance()
{
if (self::$instance == null) {
self::$instance = new self();
}
return self::$instance;
}