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<?php
/**
* Get response from server.
*
* @return mixed
* @throws Exception
*/
function getResponse()
{
$serverUrl = "https://download.phplist.org/version.json";
$updateUrl = $serverUrl . '?version=' . VERSION;
$responseFromServer = fetchUrl($updateUrl,array(),259200); ## cache for three days
$responseFromServer = json_decode($responseFromServer, true);
return $responseFromServer;
}
/**
* Check for update and return a message only if there is an update available.
*
* @return string
* @throws Exception
*/
function checkForUpdate()
{
$serverResponse = getResponse();
$version = isset($serverResponse['version']) ? $serverResponse['version'] : '';
$enabledNotification = true;
if (strpos($version, 'RC') && (getConfig('rc_notification') == 0)) {
$enabledNotification = false;
}
$versionString = isset($serverResponse['versionstring']) ? $serverResponse['versionstring'] : '';
$myVersion = str_replace('-dev','',VERSION);
if ($version !== '' && $version !== $myVersion && version_compare($myVersion, $version) < 0 && $enabledNotification) {
$updateMessage = s('A new version of phpList is available: %s',htmlentities($versionString));
} else {
$updateMessage = '';
}
## why not just save it as epoch, makes calculations much easier
SaveConfig('lastcheckupdate', date('m/d/Y h:i:s', time()), 0, true);
return $updateMessage;
}
/**
* Check every 3 days for a new update
*
* @return bool
*/
function lastTimeCheck()
{
$doCheck = false;
$currentTime = date('m/d/Y h:i:s', time());
$lastCheckTime = getConfig('lastcheckupdate');
$lastTimeFormattedDateTime = new DateTime($lastCheckTime);
$currentTimeFormattedDateTime = new DateTime($currentTime);
$interval = $currentTimeFormattedDateTime->diff($lastTimeFormattedDateTime);
$dDiff = $interval->format('%a');
if ($dDiff >= '3') {
$doCheck = true;
}
return $doCheck;
}
/**
* Show notification every 3 days only
* @return bool
*/
function showUpdateNotification()
{
# we can show all the time, the fetching is cached for three days
return true;
if (lastTimeCheck()) {
return true;
}
return false;
}