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/* -*- js-indent-level: 2; indent-tabs-mode: nil -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = ["TaskScheduler"];
const { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
const lazy = {};
XPCOMUtils.defineLazyModuleGetters(lazy, {
WinImpl: "resource://gre/modules/TaskSchedulerWinImpl.jsm",
MacOSImpl: "resource://gre/modules/TaskSchedulerMacOSImpl.jsm",
});
XPCOMUtils.defineLazyGetter(lazy, "gImpl", () => {
if (AppConstants.platform == "win") {
return lazy.WinImpl;
}
if (AppConstants.platform == "macosx") {
return lazy.MacOSImpl;
}
// Stubs for unsupported platforms
return {
registerTask() {},
deleteTask() {},
deleteAllTasks() {},
};
});
const { AppConstants } = ChromeUtils.importESModule(
"resource://gre/modules/AppConstants.sys.mjs"
);
/**
* Interface to a system task scheduler, capable of running a command line at an interval
* independent of the application.
*
* The expected consumer of this component wants to run a periodic short-lived maintenance task.
* These periodic maintenance tasks will be per-OS-level user and run with the OS-level user's
* permissions. (These still need to work across systems with multiple users and the various
* ownership and permission combinations that we see.) This component does not help schedule
* maintenance daemons, meaning long-lived processes.
*
* Currently only implemented for Windows and macOS, on other platforms these calls do nothing.
*
* The implementation will only interact with tasks from the same install of this application.
* - On Windows the native tasks are named like "\<vendor>\<id> <install path hash>",
* e.g. "\Mozilla\Task Identifier 308046B0AF4A39CB"
* - On macOS the native tasks are labeled like "<macOS bundle ID>.<install path hash>.<id>",
* e.g. "org.mozilla.nightly.308046B0AF4A39CB.Task Identifier".
*/
var TaskScheduler = {
MIN_INTERVAL_SECONDS: 1800,
/**
* Create a scheduled task that will run a command indepedent of the application.
*
* It will run every intervalSeconds seconds, starting intervalSeconds seconds from now.
*
* If the task is unable to run one or more scheduled times (e.g. if the computer is
* off, or the owning user is not logged in), then the next time a run is possible the task
* will be run once.
*
* An existing task with the same `id` will be replaced.
*
* Only one instance of the task will run at once, though this does not affect different
* tasks from the same application.
*
* @param id
* A unique string (including a UUID is recommended) to distinguish the task among
* other tasks from this installation.
* This string will also be visible to system administrators, so it should be a legible
* description, but it does not need to be localized.
*
* @param command
* Full path to the executable to run.
*
* @param intervalSeconds
* Interval at which to run the command, in seconds. Minimum 1800 (30 minutes).
*
* @param options
* Optional, as are all of its properties:
* {
* args
* Array of arguments to pass on the command line. Does not include the command
* itself even if that is considered part of the command line. If missing, no
* argument list is generated.
*
* workingDirectory
* Working directory for the command. If missing, no working directory is set.
*
* description
* A description string that will be visible to system administrators. This should
* be localized. If missing, no description is set.
*
* disabled
* If true the task will be created disabled, so that it will not be run.
* Ignored on macOS: see comments in TaskSchedulerMacOSImpl.jsm.
* Default false, intended for tests.
*
* executionTimeoutSec
* Specifies how long (in seconds) the scheduled task can execute for before it is
* automatically stopped by the task scheduler. If a value <= 0 is given, it will be
* ignored.
* This is not currently implemented on macOS.
* On Windows, the default timeout is 72 hours.
* }
* }
*/
async registerTask(id, command, intervalSeconds, options) {
if (typeof id !== "string") {
throw new Error("id is not a string");
}
if (!Number.isInteger(intervalSeconds)) {
throw new Error("Interval is not an integer");
}
if (intervalSeconds < this.MIN_INTERVAL_SECONDS) {
throw new Error("Interval is too short");
}
return lazy.gImpl.registerTask(id, command, intervalSeconds, options);
},
/**
* Delete a scheduled task previously created with registerTask.
*
* @throws NS_ERROR_FILE_NOT_FOUND if the task does not exist.
*/
async deleteTask(id) {
return lazy.gImpl.deleteTask(id);
},
/**
* Delete all tasks registered by this application.
*/
async deleteAllTasks() {
return lazy.gImpl.deleteAllTasks();
},
/**
* Checks if a task exists.
*
* @param id
* A string representing the identifier of the task to look for.
*
* @return
* true if the task exists, otherwise false.
*/
async taskExists(id) {
return lazy.gImpl.taskExists(id);
},
};
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