gctools-outilsgc / gcconnex

	 * @param int $guid GUID of the current image

	 * @return TidypicsImage

	 */

	public function getPreviousImage($guid) {

		$imageList = $this->getImageList();

		$key = array_search($guid, $imageList);

		if ($key === FALSE) {

			return null;

		}

		$key--;

		if ($key < 0) {

			return get_entity(end($imageList));

		}

		return get_entity($imageList[$key]);

	}

	/**

	 * Get the next image in the album. Wraps around to the first image if given the last.

	 * @param int $guid GUID of the current image

	 * @return TidypicsImage

	 */

	public function getNextImage($guid) {

		$imageList = $this->getImageList();

		$key = array_search($guid, $imageList);

		if ($key === FALSE) {

			return null;

		}

		$key++;

		if ($key >= count($imageList)) {

			return get_entity($imageList[0]);

		}

		return get_entity($imageList[$key]);

	}

	/**

	 * Get the index into the album for a particular image