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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2008 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 graphics_Core {
/**
* Add a new graphics rule.
*
* Rules are applied to targets (thumbnails and resizes) in priority order. Rules are functions
* in the graphics class. So for example, the following rule:
*
* graphics::add_rule("core", "thumb", "resize", array(200, 200, Image::AUTO), 100);
*
* Specifies that "core" is adding a rule to resize thumbnails down to a max of 200px on
* the longest side. The core module adds default rules at a priority of 100. You can set
* higher and lower priorities to perform operations before or after this fires.
*
* @param string $module_name the module that added the rule
* @param string $target the target for this operation ("thumb" or "resize")
* @param string $operation the name of the operation
* @param array $args arguments to the operation
* @param integer $priority the priority for this function (lower priorities are run first)
*/
public static function add_rule($module_name, $target, $operation, $args, $priority) {
$rule = ORM::factory("graphics_rule");
$rule->module_name = $module_name;
$rule->target = $target;
$rule->operation = $operation;
$rule->priority = $priority;
$rule->args = serialize($args);
$rule->save();
self::mark_all_dirty();
}
/**
* Remove all rules for this module
* @param string $module_name
*/
public static function remove_rules($module_name) {
$db = Database::instance();
$result = $db->query("DELETE FROM `graphics_rules` WHERE `module_name` = '$module_name'");
if ($result->count()) {
self::mark_all_dirty();
}
}
/**
* Rebuild the thumb and resize for the given item.
* @param Item_Model $item
*/
public static function generate($item) {
if ($item->type == "album") {
$cover = $item->album_cover();
if (!$cover) {
return;
}
$input_file = $cover->file_path();
} else {
$input_file = $item->file_path();
}
$ops = array();
if ($item->thumb_dirty) {
$ops["thumb"] = $item->thumb_path();
}
if ($item->resize_dirty && $item->type != "album") {
$ops["resize"] = $item->resize_path();
}
if (!$ops) {
return;
}
foreach (array("thumb" => $item->thumb_path(),
"resize" => $item->resize_path()) as $target => $output_file) {
foreach (ORM::factory("graphics_rule")
->where("target", $target)
->orderby("priority", "asc")
->find_all() as $rule) {
$args = array_merge(array($input_file, $output_file), unserialize($rule->args));
call_user_func_array(array("graphics", $rule->operation), $args);
}
}
if (!empty($ops["thumb"])) {
$dims = getimagesize($item->thumb_path());
$item->thumb_width = $dims[0];
$item->thumb_height = $dims[1];
$item->thumb_dirty = 0;
}
if (!empty($ops["resize"])) {
$dims = getimagesize($item->resize_path());
$item->resize_width = $dims[0];
$item->resize_height = $dims[1];
$item->resize_dirty = 0;
}
$item->save();
}
/**
* Wrapper around Image::resize
* @param string $input_file
* @param string $output_file
* @param integer $width
* @param integer $height
* @param integer $master Master Dimension constant from the Image class
*/
public static function resize($input_file, $output_file, $width, $height, $master) {
Image::factory($input_file)
->resize($width, $height, $master)
->save($output_file);
}
/**
* Return a query result that locates all items with dirty images.
* @return Database_Result Query result
*/
private static function _find_dirty_images_query() {
return Database::instance()->query(
"SELECT `id` FROM `items` " .
"WHERE (`thumb_dirty` = 1 AND (`type` <> 'album' OR `right` - `left` > 1))" .
" OR (`resize_dirty` = 1 AND `type` = 'photo')");
}
/**
* Mark all thumbnails and resizes as dirty. They will have to be rebuilt.
*
*/
public static function mark_all_dirty() {
$db = Database::instance();
$db->query("UPDATE `items` SET `thumb_dirty` = 1, `resize_dirty` = 1");
$count = self::_find_dirty_images_query()->count();
if ($count) {
message::warning(
sprintf(_("%d of your photos are out of date. %sClick here to fix them%s"),
$count, "<a href=\"" .
url::site("admin/maintenance/start/rebuild_images") .
"\" class=\"gDialogLink\">", "</a>"),
"graphics_dirty");
}
}
/**
* Task that rebuilds all dirty images.
* @param Task_Model the task
*/
public static function rebuild_dirty_images($task) {
$db = Database::instance();
$result = self::_find_dirty_images_query();
$remaining = $result->count();
$completed = $task->get("completed", 0);
$i = 0;
foreach ($result as $row) {
$item = ORM::factory("item", $row->id);
if ($item->loaded) {
self::generate($item);
}
$completed++;
$remaining--;
if ($i++ == 3) {
break;
}
}
$task->status = sprintf(
_("Updated %d out of %d images"), $completed, $remaining + $completed);
if ($completed + $remaining > 0) {
$task->percent_complete = (int)(100 * $completed / ($completed + $remaining));
} else {
$task->percent_complete = 100;
}
$task->set("completed", $completed);
$task->done = ($remaining == 0);
if ($task->done) {
message::clear_permanent("graphics_dirty");
}
}
}
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