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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2013 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class Tag_Model_Core extends ORM {
protected $has_and_belongs_to_many = array("items");
public function __construct($id=null) {
parent::__construct($id);
if (!$this->loaded()) {
// Set reasonable defaults
$this->count = 0;
}
}
/**
* Return all viewable items associated with this tag.
* @param integer $limit number of rows to limit result to
* @param integer $offset offset in result to start returning rows from
* @param string $where an array of arrays, each compatible with ORM::where()
* @return ORM_Iterator
*/
public function items($limit=null, $offset=null, $where=array()) {
if (is_scalar($where)) {
// backwards compatibility
$where = array(array("items.type", "=", $where));
}
return ORM::factory("item")
->viewable()
->join("items_tags", "items.id", "items_tags.item_id")
->where("items_tags.tag_id", "=", $this->id)
->merge_where($where)
->order_by("items.id", DESC)
->find_all($limit, $offset);
}
/**
* Return the count of all viewable items associated with this tag.
* @param string $where an array of arrays, each compatible with ORM::where()
* @return integer
*/
public function items_count($where=array()) {
if (is_scalar($where)) {
// backwards compatibility
$where = array(array("items.type", "=", $where));
}
return $model = ORM::factory("item")
->viewable()
->join("items_tags", "items.id", "items_tags.item_id")
->where("items_tags.tag_id", "=", $this->id)
->merge_where($where)
->count_all();
}
/**
* Overload ORM::save() to trigger an item_related_update event for all items that are related
* to this tag.
*/
public function save() {
// Check to see if another tag exists with the same name
$duplicate_tag = ORM::factory("tag")
->where("name", "=", $this->name)
->where("id", "!=", $this->id)
->find();
if ($duplicate_tag->loaded()) {
// If so, tag its items with this tag so as to merge it
$duplicate_tag_items = ORM::factory("item")
->join("items_tags", "items.id", "items_tags.item_id")
->where("items_tags.tag_id", "=", $duplicate_tag->id)
->find_all();
foreach ($duplicate_tag_items as $item) {
$this->add($item);
}
// ... and remove the duplicate tag
$duplicate_tag->delete();
}
if (isset($this->object_relations["items"])) {
$added = array_diff($this->changed_relations["items"], $this->object_relations["items"]);
$removed = array_diff($this->object_relations["items"], $this->changed_relations["items"]);
if (isset($this->changed_relations["items"])) {
$changed = array_merge($added, $removed);
}
$this->count = count($this->object_relations["items"]) + count($added) - count($removed);
}
$result = parent::save();
if (!empty($changed)) {
foreach (ORM::factory("item")->where("id", "IN", $changed)->find_all() as $item) {
module::event("item_related_update", $item);
}
}
return $result;
}
/**
* Overload ORM::delete() to trigger an item_related_update event for all items that are
* related to this tag, and delete all items_tags relationships.
*/
public function delete($ignored_id=null) {
$related_item_ids = array();
foreach (db::build()
->select("item_id")
->from("items_tags")
->where("tag_id", "=", $this->id)
->execute() as $row) {
$related_item_ids[$row->item_id] = 1;
}
db::build()->delete("items_tags")->where("tag_id", "=", $this->id)->execute();
$result = parent::delete();
if ($related_item_ids) {
foreach (ORM::factory("item")
->where("id", "IN", array_keys($related_item_ids))
->find_all() as $item) {
module::event("item_related_update", $item);
}
}
return $result;
}
/**
* Return the server-relative url to this item, eg:
* /gallery3/index.php/tags/35/Bob
*
* @param string $query the query string (eg "page=3")
*/
public function url($query=null) {
$url = url::site("tag/{$this->id}/" . urlencode($this->name));
if ($query) {
$url .= "?$query";
}
return $url;
}
/**
* Return the full url to this item, eg:
* http://example.com/gallery3/index.php/tags/35/Bob
*
* @param string $query the query string (eg "page=3")
*/
public function abs_url($query=null) {
$url = url::abs_site("tag/{$this->id}/" . urlencode($this->name));
if ($query) {
$url .= "?$query";
}
return $url;
}
}
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