/**
* Displays the "versioning preview".
* The functions checks:
* - if the extension "version" is loaded
* - if a BE_user is logged in
* - the plausibility of the requested "version preview".
* If this is all OK, "displaySingle()" is executed to display the "versioning preview".
*
* @return string html code for the "versioning preview"
*/
function displayVersionPreview()
{
$piADMCMD = FALSE;
$content = '';
if ($this->versioningEnabled) {
$vPrev = t3lib_div::_GP('ADMCMD_vPrev');
if ($this->piVars['ADMCMD_vPrev']) {
$piADMCMD = unserialize(rawurldecode($this->piVars['ADMCMD_vPrev']));
}
if ((is_array($vPrev) || is_array($piADMCMD)) && is_object($GLOBALS['BE_USER'])) {
// check if ADMCMD_vPrev is set and if a BE_user is logged in. $this->piVars['ADMCMD_vPrev'] is needed for previewing a "single view with pagebrowser"
if (!is_array($vPrev)) {
$vPrev = $piADMCMD;
}
list($table, $t3ver_oid) = explode(':', key($vPrev));
if ($table == 'tt_news') {
if ($testrec = $this->pi_getRecord('tt_news', intval($vPrev[key($vPrev)]))) {
// check if record exists before doing anything
if ($testrec['t3ver_oid'] == intval($t3ver_oid) && $testrec['pid'] == -1) {
// check if requested t3ver_oid is the t3ver_oid of the requested tt_news record, and if the pid of the record is -1 (=non-plublic version)
$this->tsfe->set_no_cache();
// version preview will never be cached
// make version preview message with a link to the public version of hte record which is previewed
$vPrevHeader = $this->local_cObj->stdWrap($this->pi_getLL('versionPreviewMessage') . $this->local_cObj->typolink($this->local_cObj->stdWrap($this->pi_getLL('versionPreviewMessageLinkToOriginal'), $this->conf['versionPreviewMessageLinkToOriginal_stdWrap.']), array('parameter' => $this->config['singlePid'] . ' _blank', 'additionalParams' => '&tx_ttnews[tt_news]=' . $t3ver_oid, 'no_cache' => 1)), $this->conf['versionPreviewMessage_stdWrap.']);
$this->tt_news_uid = intval($vPrev[key($vPrev)]);
$this->piVars['tt_news'] = $this->tt_news_uid;
$this->piVars['ADMCMD_vPrev'] = rawurlencode(serialize(array($table . ':' . $t3ver_oid => $this->tt_news_uid)));
$this->theCode = 'SINGLE';
$this->vPrev = true;
$content = $vPrevHeader . $this->displaySingle();
} else {
// error: t3ver_oid mismatch
$GLOBALS['TT']->setTSlogMessage('tt_news: ERROR! The "t3ver_oid" of requested tt_news record and the "t3ver_oid" from GPvars doesn\'t match.');
}
}
}
}
}
if ($this->debugTimes) {
$this->hObj->getParsetime(__METHOD__);
}
return $content;
}
