diff options
Diffstat (limited to 'modules/gallery/helpers/task.php')
| -rw-r--r-- | modules/gallery/helpers/task.php | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/modules/gallery/helpers/task.php b/modules/gallery/helpers/task.php new file mode 100644 index 0000000..5638faf --- /dev/null +++ b/modules/gallery/helpers/task.php @@ -0,0 +1,113 @@ +<?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 task_Core { + /** + * Get all available tasks + */ + static function get_definitions() { + $tasks = array(); + foreach (module::active() as $module) { + $class_name = "{$module->name}_task"; + if (class_exists($class_name) && method_exists($class_name, "available_tasks")) { + foreach (call_user_func(array($class_name, "available_tasks")) as $task) { + $tasks[$task->callback] = $task; + } + } + } + + return $tasks; + } + + static function start($task_callback, $context=array()) { + $tasks = task::get_definitions(); + $task = task::create($tasks[$task_callback], array()); + + $task->log(t("Task %task_name started (task id %task_id)", + array("task_name" => $task->name, "task_id" => $task->id))); + return $task; + } + + static function create($task_def, $context) { + $task = ORM::factory("task"); + $task->callback = $task_def->callback; + $task->name = $task_def->name; + $task->percent_complete = 0; + $task->status = ""; + $task->state = "started"; + $task->owner_id = identity::active_user()->id; + $task->context = serialize($context); + $task->save(); + + return $task; + } + + static function cancel($task_id) { + $task = ORM::factory("task", $task_id); + if (!$task->loaded()) { + throw new Exception("@todo MISSING_TASK"); + } + $task->done = 1; + $task->state = "cancelled"; + $task->log(t("Task %task_name cancelled (task id %task_id)", + array("task_name" => $task->name, "task_id" => $task->id))); + $task->save(); + + return $task; + } + + static function remove($task_id) { + $task = ORM::factory("task", $task_id); + if ($task->loaded()) { + $task->delete(); + } + } + + static function run($task_id) { + $task = ORM::factory("task", $task_id); + if (!$task->loaded()) { + throw new Exception("@todo MISSING_TASK"); + } + + try { + $task->state = "running"; + call_user_func_array($task->callback, array(&$task)); + if ($task->done) { + $task->log($task->status); + } + $task->save(); + } catch (Exception $e) { + Kohana_Log::add("error", (string)$e); + + // Ugh. I hate to use instanceof, But this beats catching the exception separately since + // we mostly want to treat it the same way as all other exceptions + if ($e instanceof ORM_Validation_Exception) { + Kohana_Log::add("error", "Validation errors: " . print_r($e->validation->errors(), 1)); + } + + $task->log((string)$e); + $task->state = "error"; + $task->done = true; + $task->status = substr($e->getMessage(), 0, 255); + $task->save(); + } + + return $task; + } +}
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