protected function getUndoContent($startContent, $stopContent, $currentContent)
{
if ($currentContent === $stopContent) {
return $startContent;
} else {
// 3-way merge
$ok = wfMerge($stopContent, $startContent, $currentContent, $result);
if ($ok) {
return $result;
} else {
return false;
}
}
}
/**
* Attempts to merge differences between three versions. Returns a new
* Content object for a clean merge and false for failure or a conflict.
*
* All three Content objects passed as parameters must have the same
* content model.
*
* This text-based implementation uses wfMerge().
*
* @param Content $oldContent The page's previous content.
* @param Content $myContent One of the page's conflicting contents.
* @param Content $yourContent One of the page's conflicting contents.
*
* @return Content|bool
*/
public function merge3(Content $oldContent, Content $myContent, Content $yourContent)
{
$this->checkModelID($oldContent->getModel());
$this->checkModelID($myContent->getModel());
$this->checkModelID($yourContent->getModel());
$format = $this->getDefaultFormat();
$old = $this->serializeContent($oldContent, $format);
$mine = $this->serializeContent($myContent, $format);
$yours = $this->serializeContent($yourContent, $format);
$ok = wfMerge($old, $mine, $yours, $result);
if (!$ok) {
return false;
}
if (!$result) {
return $this->makeEmptyContent();
}
$mergedContent = $this->unserializeContent($result, $format);
return $mergedContent;
}
/**
* @access private
* @todo document
*/
function mergeChangesInto(&$editText)
{
$fname = 'EditPage::mergeChangesInto';
wfProfileIn($fname);
$db =& wfGetDB(DB_MASTER);
// This is the revision the editor started from
$baseRevision = Revision::loadFromTimestamp($db, $this->mArticle->mTitle, $this->edittime);
if (is_null($baseRevision)) {
wfProfileOut($fname);
return false;
}
$baseText = $baseRevision->getText();
// The current state, we want to merge updates into it
$currentRevision = Revision::loadFromTitle($db, $this->mArticle->mTitle);
if (is_null($currentRevision)) {
wfProfileOut($fname);
return false;
}
$currentText = $currentRevision->getText();
if (wfMerge($baseText, $editText, $currentText, $result)) {
$editText = $result;
wfProfileOut($fname);
return true;
} else {
wfProfileOut($fname);
return false;
}
}
/**
* @param string $old Text as it was in the database
* @param string $mine Text submitted while user was editing
* @param string $yours Text submitted by the user
* @param bool $expectedMergeResult Whether the merge should be a success
* @param string $expectedText Text after merge has been completed
*
* @dataProvider provideMerge()
* @group medium
* @covers ::wfMerge
*/
public function testMerge($old, $mine, $yours, $expectedMergeResult, $expectedText)
{
$this->checkHasDiff3();
$mergedText = null;
$isMerged = wfMerge($old, $mine, $yours, $mergedText);
$msg = 'Merge should be a ';
$msg .= $expectedMergeResult ? 'success' : 'failure';
$this->assertEquals($expectedMergeResult, $isMerged, $msg);
if ($isMerged) {
// Verify the merged text
$this->assertEquals($expectedText, $mergedText, 'is merged text as expected?');
}
}
/**
* Get the text that needs to be saved in order to undo all revisions
* between $undo and $undoafter. Revisions must belong to the same page,
* must exist and must not be deleted
* @param $undo Revision
* @param $undoafter Revision Must be an earlier revision than $undo
* @return mixed string on success, false on failure
*/
public function getUndoText(Revision $undo, Revision $undoafter = null)
{
$currentRev = Revision::newFromTitle($this->mTitle);
if (!$currentRev) {
return false;
// no page
}
$undo_text = $undo->getText();
$undoafter_text = $undoafter->getText();
$cur_text = $currentRev->getText();
if ($cur_text == $undo_text) {
# No use doing a merge if it's just a straight revert.
return $undoafter_text;
}
$undone_text = '';
if (!wfMerge($undo_text, $undoafter_text, $cur_text, $undone_text)) {
return false;
}
return $undone_text;
}
/**
* @private
* @todo document
*
* @parma $editText string
*
* @return bool
*/
function mergeChangesInto(&$editText)
{
wfProfileIn(__METHOD__);
$db = wfGetDB(DB_MASTER);
// This is the revision the editor started from
$baseRevision = $this->getBaseRevision();
if (is_null($baseRevision)) {
wfProfileOut(__METHOD__);
return false;
}
$baseText = $baseRevision->getText();
// The current state, we want to merge updates into it
$currentRevision = Revision::loadFromTitle($db, $this->mTitle);
if (is_null($currentRevision)) {
wfProfileOut(__METHOD__);
return false;
}
$currentText = $currentRevision->getText();
$result = '';
if (wfMerge($baseText, $editText, $currentText, $result)) {
$editText = $result;
wfProfileOut(__METHOD__);
return true;
} else {
wfProfileOut(__METHOD__);
return false;
}
}
/**
* Get the text that needs to be saved in order to undo all revisions
* between $undo and $undoafter. Revisions must belong to the same page,
* must exist and must not be deleted
* @param $undo Revision
* @param $undoafter Revision Must be an earlier revision than $undo
* @return mixed string on success, false on failure
*/
public function getUndoText(Revision $undo, Revision $undoafter = null)
{
$cur_text = $this->getRawText();
if ($cur_text === false) {
return false;
// no page
}
$undo_text = $undo->getText();
$undoafter_text = $undoafter->getText();
if ($cur_text == $undo_text) {
# No use doing a merge if it's just a straight revert.
return $undoafter_text;
}
$undone_text = '';
if (!wfMerge($undo_text, $undoafter_text, $cur_text, $undone_text)) {
return false;
}
return $undone_text;
}
/**
* @desc Saving CSS content
* If there is more recent edit it will try to merge text and save.
* Returns false when conflict is found and cannot be resolved
*
* @param string $content
* @param string $summary
* @param bool $isMinor
* @param int $editTime timestamp
* @param User $user
* @return Status|bool
*/
public function saveCssFileContent($content, $summary, $isMinor, $editTime, $user)
{
$cssTitle = $this->getCssFileTitle();
$flags = 0;
if ($cssTitle instanceof Title) {
$aid = $cssTitle->getArticleID(Title::GAID_FOR_UPDATE);
$flags |= $aid == 0 ? EDIT_NEW : EDIT_UPDATE;
if ($isMinor) {
$flags |= EDIT_MINOR;
}
$db = wfGetDB(DB_MASTER);
$currentRevision = Revision::loadFromTitle($db, $cssTitle);
// we handle both - edit and creation conflicts below
if (!empty($currentRevision) && $editTime != $currentRevision->getTimestamp()) {
$result = '';
$currentText = $currentRevision->getText();
if (!$editTime) {
// the css did not exist when the editor was started, so the base revision for
// parallel edits is an empty file
$baseText = '';
} else {
$baseText = Revision::loadFromTimestamp($db, $this->getCssFileTitle(), $editTime)->getText();
}
// remove windows endlines from input before merging texts
$content = str_replace("\r", "", $content);
if (wfMerge($baseText, $content, $currentText, $result)) {
// This conflict can be resolved
$content = $result;
} else {
// We have real conflict here
return false;
}
}
$page = new WikiPage($cssTitle);
$status = $page->doEdit($content, $summary, $flags, false, $user);
return $status;
}
return Status::newFatal('special-css-saving-internal-error');
}