/**
* Save tag substitutions
*
* @param string $tag_string
* @return boolean
*/
public function saveSubstitutions($tag_string = '')
{
// Get the old list of substitutions
$subs = array();
foreach ($this->substitutes()->rows() as $sub) {
$subs[$sub->get('tag')] = $sub;
}
// Add the specified tags as substitutes if not
// already a substitute
$raw_tags = trim($tag_string);
$raw_tags = preg_split("/(,|;)/", $raw_tags);
$tags = array();
foreach ($raw_tags as $raw_tag) {
$nrm = $this->normalize($raw_tag);
$tags[] = $nrm;
if (isset($subs[$nrm])) {
continue;
// Substitution already exists
}
$sub = Substitute::blank();
$sub->set('raw_tag', trim($raw_tag));
$sub->set('tag', trim($nrm));
$sub->set('tag_id', $this->get('id'));
if (!$sub->save()) {
$this->addError($sub->getError());
}
}
// Run through the old list of substitutions, finding any
// not in the new list and delete them
foreach ($subs as $key => $sub) {
if (!in_array($key, $tags)) {
if (!$sub->destroy()) {
$this->addError($sub->getError());
return false;
}
}
}
// Get all possibly existing tags that are now aliases
$ids = self::all()->whereIn('tag', $tags)->rows();
// Move associations on tag and delete tag
foreach ($ids as $tag) {
if ($tag->get('id') != $this->get('id')) {
// Get all the associations to this tag
// Loop through the associations and link them to a different tag
Object::moveTo($tag->get('id'), $this->get('id'));
// Get all the substitutions to this tag
// Loop through the records and link them to a different tag
Substitute::moveTo($tag->get('id'), $this->get('id'));
// Delete the tag
$tag->destroy();
}
}
$this->set('objects', $this->objects()->total());
$this->set('substitutes', $this->substitutes()->total());
$this->save();
return true;
}
