/**
* Function called before extension installation/update/removal procedure commences
*
* @param string $type The type of change (install, update or discover_install, not uninstall)
* @param JInstallerAdapter $parent The class calling this method
*
* @return boolean True on success
*
* @since 3.6
*/
public function preflight($type, $parent)
{
// Check for the minimum PHP version before continuing
if (!empty($this->minimumPhp) && !version_compare(PHP_VERSION, $this->minimumPhp, '>')) {
JLog::add(JText::sprintf('JLIB_INSTALLER_MINIMUM_PHP', $this->minimumPhp), JLog::WARNING, 'jerror');
}
// Check for the minimum Joomla version before continuing
if (!empty($this->minimumJoomla) && !version_compare(JVERSION, $this->minimumJoomla, '>')) {
JLog::add(JText::sprintf('JLIB_INSTALLER_MINIMUM_JOOMLA', $this->minimumJoomla), JLog::WARNING, 'jerror');
}
// Extension manifest file version
$this->release = $parent->get("manifest")->version;
$extensionType = substr($this->extension, 0, 3);
// Modules parameters are located in the module table - else in the extension table
if ($extensionType === 'mod') {
$this->paramTable = '#__modules';
} else {
$this->paramTable = '#__extensions';
}
// Abort if the extension being installed is not newer than the currently installed version
if (strtolower($type) == 'update' && !$this->allowDowngrades) {
$manifest = $this->getItemArray('manifest_cache', '#__extensions', 'element', JFactory::getDbo()->quote($this->extension));
$oldRelease = $manifest['version'];
if (version_compare($this->release, $oldRelease, '<')) {
JFactory::getApplication()->enqueueMessage(JText::sprintf('JLIB_INSTALLER_INCORRECT_SEQUENCE', $oldRelease, $this->release), 'error');
return false;
}
}
return true;
}
/**
* Shit happens. Patched function to bypass bug in package uninstaller
*
* @param JInstallerAdapter $parent Parent object
*
* @return void
*/
protected function loadManifest($parent)
{
$element = strtolower(str_replace('InstallerScript', '', get_called_class()));
$elementParts = explode('_', $element);
// Type not properly detected or not a package
if (count($elementParts) != 2 || strtolower($elementParts[0]) != 'pkg') {
$this->manifest = $parent->get('manifest');
return;
}
$rootPath = $parent->getParent()->getPath('extension_root');
$manifestPath = dirname($rootPath);
$manifestFile = $manifestPath . '/' . $element . '.xml';
// Package manifest found
if (file_exists($manifestFile)) {
$this->manifest = JFactory::getXML($manifestFile);
return;
}
$this->manifest = $parent->get('manifest');
}
