/**
* This function displays the difference between two page versions.
*
* @author Johannes Klose <*****@*****.**>
* @return void
**/
function opDiff()
{
$tpl =& singleton('template');
if (isset($this->get['orig'], $this->get['final'])) {
$orig = $this->get['orig'];
$final = $this->get['final'];
if (!preg_match('/^\\d+\\.\\d+\\.\\d+$/', $orig) || !preg_match('/^\\d+\\.\\d+\\.\\d+$/', $final)) {
if (preg_match('/^\\d+\\.\\d+\\.\\d+$/', $final)) {
$orig = diff::findPrevVersion($final, $this->pageVersions);
if ($orig === false) {
$this->opList();
return;
}
} else {
$this->opList();
return;
}
}
if (!isset($this->pageVersions[$orig]) || !isset($this->pageVersions[$final])) {
$this->opList();
return;
}
$origText = diff::createVersion($this->page['page_text'], $this->pageVersions, $orig);
$finalText = diff::createVersion($this->page['page_text'], $this->pageVersions, $final);
$diff = diff::makeDiff($origText, $finalText, $this->pageVersions);
$tpl->assign('diff_orig', $diff['orig']);
$tpl->assign('diff_final', $diff['final']);
$this->historyTemplate = 'action_history_diff.tpl';
$this->lang['history_original'] = sprintf($this->lang['history_original'], $orig, $final, $this->pageVersions[$final]['log_time']);
$this->lang['history_final'] = sprintf($this->lang['history_final'], $orig, $final, $this->pageVersions[$final]['log_time']);
return;
} else {
$this->opList();
}
}
