/**
* Samples a random thumb from the specified gallery and compares dimensions against Config settings
* @param Integer Gallery ID
* @return Boolean True if size has changed, false if not.
*/
function thumbSizeChanged($gid)
{
global $rsgConfig;
$gallery = rsgGalleryManager::_get($gid);
$images = $gallery->items();
foreach ($images as $image) {
$imgname[] = $image->name;
}
$image = array_rand($imgname);
$imgdata = getimagesize(imgUtils::getImgThumb($imgname[$image], true));
if ($imgdata[0] == $rsgConfig->get('thumb_width')) {
return false;
} else {
return true;
}
}
/**
* Function will regenerate thumbs for a specific gallery or set of galleries
* @todo Check if width really changed, else no resize needed.
* Perhaps by sampling the oldest thumb from the gallery and checking dimensions against current setting.
*/
function executeRegenerateImages()
{
global $rsgConfig, $mainframe;
$error = 0;
$gid = rsgInstance::getVar('gid', array());
if (empty($gid)) {
$mainframe->redirect("index2.php?option=com_rsgallery2&rsgOption=maintenance&task=regenerateThumbs", JText::_('NO_GALLERY_SELECTED'));
return;
}
foreach ($gid as $id) {
if ($id > 0) {
//Check if resize is really needed. It takes a lot of resources when changing thumbs when dimensions did not change!
if (!rsg2_maintenance::thumbSizeChanged($id)) {
$mainframe->redirect("index2.php?option=com_rsgallery2&rsgOption=maintenance&task=regenerateThumbs", JText::_('THUMBNAIL_SIZE_DID_NOT_CHANGE_REGENERATION_NOT_NEEDED'));
return;
} else {
$gallery = rsgGalleryManager::_get($id);
$images = $gallery->items();
foreach ($images as $image) {
$imagename = imgUtils::getImgOriginal($image->name, true);
if (!imgUtils::makeThumbImage($imagename)) {
//Error counter
$error++;
}
}
}
}
}
if ($error > 0) {
$msg = JText::_('MAINT_REGEN_ERRORS');
} else {
$msg = JText::_('MAINT_REGEN_NO_ERRORS');
}
$mainframe->redirect("index2.php?option=com_rsgallery2&rsgOption=maintenance&task=regenerateThumbs", $msg);
}
/**
* returns an array of galleries from an array of IDs
* @param id of the gallery
*/
function _getArray($cid)
{
$galleries = array();
foreach ($cid as $gid) {
$galleries[] = rsgGalleryManager::_get($gid);
}
return $galleries;
}
