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"use strict";
var {classes: Cc, interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/ExtensionUtils.jsm");
var {
EventManager,
} = ExtensionUtils;
// WeakMap[Extension -> Map[name -> Alarm]]
var alarmsMap = new WeakMap();
// WeakMap[Extension -> Set[callback]]
var alarmCallbacksMap = new WeakMap();
// Manages an alarm created by the extension (alarms API).
function Alarm(extension, name, alarmInfo) {
this.extension = extension;
this.name = name;
this.when = alarmInfo.when;
this.delayInMinutes = alarmInfo.delayInMinutes;
this.periodInMinutes = alarmInfo.periodInMinutes;
this.canceled = false;
let delay, scheduledTime;
if (this.when) {
scheduledTime = this.when;
delay = this.when - Date.now();
} else {
if (!this.delayInMinutes) {
this.delayInMinutes = this.periodInMinutes;
}
delay = this.delayInMinutes * 60 * 1000;
scheduledTime = Date.now() + delay;
}
this.scheduledTime = scheduledTime;
let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
timer.init(this, delay, Ci.nsITimer.TYPE_ONE_SHOT);
this.timer = timer;
}
Alarm.prototype = {
clear() {
this.timer.cancel();
alarmsMap.get(this.extension).delete(this.name);
this.canceled = true;
},
observe(subject, topic, data) {
if (this.canceled) {
return;
}
for (let callback of alarmCallbacksMap.get(this.extension)) {
callback(this);
}
if (!this.periodInMinutes) {
this.clear();
return;
}
let delay = this.periodInMinutes * 60 * 1000;
this.scheduledTime = Date.now() + delay;
this.timer.init(this, delay, Ci.nsITimer.TYPE_ONE_SHOT);
},
get data() {
return {
name: this.name,
scheduledTime: this.scheduledTime,
periodInMinutes: this.periodInMinutes,
};
},
};
/* eslint-disable mozilla/balanced-listeners */
extensions.on("startup", (type, extension) => {
alarmsMap.set(extension, new Map());
alarmCallbacksMap.set(extension, new Set());
});
extensions.on("shutdown", (type, extension) => {
if (alarmsMap.has(extension)) {
for (let alarm of alarmsMap.get(extension).values()) {
alarm.clear();
}
alarmsMap.delete(extension);
alarmCallbacksMap.delete(extension);
}
});
/* eslint-enable mozilla/balanced-listeners */
extensions.registerSchemaAPI("alarms", "addon_parent", context => {
let {extension} = context;
return {
alarms: {
create: function(name, alarmInfo) {
name = name || "";
let alarms = alarmsMap.get(extension);
if (alarms.has(name)) {
alarms.get(name).clear();
}
let alarm = new Alarm(extension, name, alarmInfo);
alarms.set(alarm.name, alarm);
},
get: function(name) {
name = name || "";
let alarms = alarmsMap.get(extension);
if (alarms.has(name)) {
return Promise.resolve(alarms.get(name).data);
}
return Promise.resolve();
},
getAll: function() {
let result = Array.from(alarmsMap.get(extension).values(), alarm => alarm.data);
return Promise.resolve(result);
},
clear: function(name) {
name = name || "";
let alarms = alarmsMap.get(extension);
if (alarms.has(name)) {
alarms.get(name).clear();
return Promise.resolve(true);
}
return Promise.resolve(false);
},
clearAll: function() {
let cleared = false;
for (let alarm of alarmsMap.get(extension).values()) {
alarm.clear();
cleared = true;
}
return Promise.resolve(cleared);
},
onAlarm: new EventManager(context, "alarms.onAlarm", fire => {
let callback = alarm => {
fire(alarm.data);
};
alarmCallbacksMap.get(extension).add(callback);
return () => {
alarmCallbacksMap.get(extension).delete(callback);
};
}).api(),
},
};
});
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