function test_tag($string)
{
$tag = PinholeTagFactory::get($string);
if ($tag) {
echo "=> ", $tag, ': "', $tag->getTitle(), "\"\n";
echo " Photos: ";
foreach ($tag->getPhotos() as $photo) {
echo $photo->id, ' ';
}
echo "\n";
if ($tag instanceof PinholeIterableTag) {
echo " Iterable: ", $tag->prev()->getTitle(), " <=> ", $tag->next()->getTitle(), "\n";
}
} else {
echo "=> {$string}: *** error loading tag ***\n";
}
}
/**
* Sets the default database used by the tag factory
*
* @param MDB2_Driver_Common the default database used by the tag factory.
*/
public static function setDefaultDatabase(MDB2_Driver_Common $db)
{
self::$default_database = $db;
}
/**
* Adds a tag to this tag list
*
* If this list has a database set through the
* {@link PinholeTagList::setDatabase()} method and the tag to be
* added is not already contained in this list, the database will be
* set on the added tag as well.
*
* @param string|PinholeAbstractTag $tag either a tag string or a tag
* object to add to this list.
*
* @return PinholeAbstractTag the added tag object, or the existing tag
* object if this list already contains the
* given tag. If the added tag is specified as
* a tag string and the tag string could not be
* parsed, null is returned.
*
* @throws SwatInvalidClassException if the <i>$tag</i> parameter is
* neither a string nor a
* PinholeAbstractTag.
*/
public function add($tag)
{
$added_tag = null;
if (is_string($tag)) {
$tag = PinholeTagFactory::get($tag, $this->db, $this->app->getInstance());
} elseif ($tag instanceof PinholeTagDataObject) {
$tag = new PinholeTag($this->app->getInstance(), $tag);
} elseif (!$tag instanceof PinholeAbstractTag) {
throw new SwatInvalidClassException('$tag must be either a string or a PinholeAbstractTag', 0, $tag);
}
if ($tag !== null) {
if ($this->contains($tag)) {
$added_tag = $this->get($tag);
} else {
if ($this->db instanceof MDB2_Driver_Common) {
$tag->setDatabase($this->db);
}
$this->tag_keys[] = $tag->__toString();
$this->tags[$tag->__toString()] = $tag;
$added_tag = $tag;
}
}
return $added_tag;
}