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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2009 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 item_Core {
static function move($source, $target) {
access::required("view", $source);
access::required("view", $target);
access::required("edit", $source);
access::required("edit", $target);
$parent = $source->parent();
if ($parent->album_cover_item_id == $source->id) {
if ($parent->children_count() > 1) {
foreach ($parent->children(2) as $child) {
if ($child->id != $source->id) {
$new_cover_item = $child;
break;
}
}
item::make_album_cover($new_cover_item);
} else {
item::remove_album_cover($parent);
}
}
$source->move_to($target);
// If the target has no cover item, make this it.
if ($target->album_cover_item_id == null) {
item::make_album_cover($source);
}
}
static function make_album_cover($item) {
$parent = $item->parent();
access::required("view", $item);
access::required("view", $parent);
access::required("edit", $parent);
model_cache::clear();
$parent->album_cover_item_id = $item->is_album() ? $item->album_cover_item_id : $item->id;
$parent->thumb_dirty = 1;
$parent->save();
graphics::generate($parent);
$grand_parent = $parent->parent();
if ($grand_parent && $grand_parent->album_cover_item_id == null) {
item::make_album_cover($parent);
}
}
static function remove_album_cover($album) {
access::required("view", $album);
access::required("edit", $album);
@unlink($album->thumb_path());
model_cache::clear();
$album->album_cover_item_id = null;
$album->thumb_width = 0;
$album->thumb_height = 0;
$album->thumb_dirty = 1;
$album->save();
graphics::generate($album);
}
static function validate_no_slashes($input) {
if (strpos($input->value, "/") !== false) {
$input->add_error("no_slashes", 1);
}
}
static function validate_no_trailing_period($input) {
if (rtrim($input->value, ".") !== $input->value) {
$input->add_error("no_trailing_period", 1);
}
}
static function validate_url_safe($input) {
if (preg_match("/[^A-Za-z0-9-_]/", $input->value)) {
$input->add_error("not_url_safe", 1);
}
}
/**
* Sanitize a filename into something presentable as an item title
* @param string $filename
* @return string title
*/
static function convert_filename_to_title($filename) {
$title = strtr($filename, "_", " ");
$title = preg_replace("/\..*?$/", "", $title);
$title = preg_replace("/ +/", " ", $title);
return $title;
}
/**
* Convert a filename into something we can use as a url component.
* @param string $filename
*/
static function convert_filename_to_slug($filename) {
$result = pathinfo($filename, PATHINFO_FILENAME);
$result = preg_replace("/[^A-Za-z0-9-_]+/", "-", $result);
return trim($result, "-");
}
/**
* Display delete confirmation message and form
* @param object $item
* @return string form
*/
static function get_delete_form($item) {
$page_type = Input::instance()->get("page_type");
$form = new Forge(
"quick/delete/$item->id?page_type=$page_type", "", "post", array("id" => "g-confirm-delete"));
$group = $form->group("confirm_delete")->label(t("Confirm Deletion"));
$group->submit("")->value(t("Delete"));
return $form;
}
/**
* Get the next weight value
*/
static function get_max_weight() {
// Guard against an empty result when we create the first item. It's unfortunate that we
// have to check this every time.
// @todo: figure out a better way to bootstrap the weight.
$result = db::build()
->select("weight")->from("items")
->order_by("weight", "desc")->limit(1)
->execute()->current();
return ($result ? $result->weight : 0) + 1;
}
/**
* Add a set of restrictions to any following queries to restrict access only to items
* viewable by the active user.
* @chainable
*/
static function viewable($model) {
$view_restrictions = array();
if (!identity::active_user()->admin) {
foreach (identity::group_ids_for_active_user() as $id) {
$view_restrictions[] = array("items.view_$id", "=", access::ALLOW);
}
}
if (count($view_restrictions)) {
$model->and_open()->merge_or_where($view_restrictions)->close();
}
return $model;
}
/**
* Return the root Item_Model
* @return Item_Model
*/
static function root() {
return model_cache::get("item", 1);
}
/**
* Return a random Item_Model, with optional filters
*
* @param array (optional) where tuple
*/
static function random($where=null) {
$random = ((float)mt_rand()) / (float)mt_getrandmax();
// Pick a random number and find the item that's got nearest smaller number. In the rare case
// that we chose the smallest number in the system, choose the item with the smallest number.
// This approach works best when the random numbers in the system are roughly evenly
// distributed so this is going to be more efficient with larger data sets.
$items = ORM::factory("item")
->viewable()
->where("rand_key", "<", $random)
->merge_where($where)
->order_by("rand_key", "DESC")
->find_all(1);
if ($items->count() == 0) {
$items = ORM::factory("item")
->viewable()
->merge_where($where)
->order_by("rand_key", "ASC")
->find_all(1);
}
return $items;
}
}
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