Get original photo of an album highlight

Hi,

I'm searching a simple way, given an album ID, to get the original photo of the album highlight.

As far as i understand, I'm searching a way to:
- Get the thumbnail of the album (which is the 'highlight')
- Find the original photo that produced this thumbnail

Is there already a simple function that does the job ? I haven't found.

Thanks,
Aymerick

GalleryCoreApi::fetchThumbnailsByItemIds
see developers -> G2 API docs, or just take a look at modules/core/classes/GalleryCoreApi.class

to find the original photo:
$sourceEntity = $derivative->getSourceId();

$sourceEntity can be either a GalleryPhotoItem or a GalleryDerivative

$derivative->getParentId() returns the id of the album (the id for which this derivative is used).

Actually... nevermind. I think I got it.

But now I'm getting this error: "Warning: Cannot use a scalar value as an array in <my directory>/gallery/modules/core/classes/GalleryPhotoItem.class on line 236"

Yes, I hid my domain.

- to decide whether the link should point to an album page or a photo page, you need to find out whether the album has any sub-albums. you can use GalleryCoreApi::fetchChildAlbumItemIds( ... ) in your theme.inc function showAlbumPage for that. if it returns more than 0 child albums for the id you're testing against, you can generate a link to an album page. else query for the album's highlight item to generate a link to that item's photo page.

- to get the item id of the album's highlight, you need to do the following:
the problem is that a album's highlight image is not necessarily derived from any item / photo within the album. the highlight image might be a custom thumbnail. (see "thumbnail" module).
so you need to handle multiple cases:
a) the highlight's source is an item within the album: generate a link pointing to that item in the album.
b) the highlight's source is a custom thumbnail: generate a link pointing to the first item in the album. (fallback case)

- from the album itemId you get the album's thumbnail id (=highlight id): fetchThumbnailsByItemIds($albumId)
-- if the album has no highlight ($highlightId == null / not set), you need to fall back to loading the album's first item
- from the highlight id you can load the highlight entity object: loadEntitiesById($highlightId)
- from the $highlight entity object you get its source id with $sourceId = $highlight->getDerivativeSourceId();
- with the following code you get to the actual photo item...if there is one.

do {
    list ($ret, $source) = GalleryCoreApi::loadEntitiesById($source->getDerivativeSourceId());
} while (GalleryUtilities::isA($source, 'GalleryDerivative'));

if (GalleryUtilities::isA($source, 'GalleryItem') && $source->getParentId() == $albumId) {
    $itemIdForUrl = $source->getId();
} else {
    // fall back to the first child item of the album
    // e.g. use GalleryCoreApi::fetchChildIds() to get the album's children.
}

--------------
Documentation: Support / Troubleshooting | Installation, Upgrade, Configuration and Usage

Might be clumsy, but works for me. (Gallery 2.2.5)

list ($ret, $thumbs) = GalleryCoreApi::fetchThumbnailsByItemIds($childIds);
if ($ret) {
   return array($ret, null);
}
$counter = 0;
foreach ($childIds as $child) {
   if ($theme['children']){
      if ($theme['children'][$counter]['canContainChildren'] == 1) {
         list ($ret, $childEntity) = GalleryCoreApi::loadEntitiesById($child);
         list ($ret, $subChildren) = GalleryCoreApi::fetchChildItemIds($childEntity);
         if (count($subChildren) > 0 && $counter < count($thumbs)){
            list ($ret, $derivativeThumbnailObject) = GalleryCoreApi::loadEntitiesById($thumbs[$child]->getDerivativeSourceId());
            $theme['children'][$counter]['thumbnailSourceId'] = $derivativeThumbnailObject->getParentId();
         }
      }
   }
   $counter++;
}

Thanks for help.

P.S. Updated since my last post.