gecko-dev/dom/alarm/AlarmDB.jsm

157 строки
4.6 KiB
JavaScript

/* 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";
this.EXPORTED_SYMBOLS = ["AlarmDB"];
/* static functions */
const DEBUG = false;
function debug(aStr) {
if (DEBUG)
dump("AlarmDB: " + aStr + "\n");
}
const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/IndexedDBHelper.jsm");
const ALARMDB_NAME = "alarms";
const ALARMDB_VERSION = 1;
const ALARMSTORE_NAME = "alarms";
this.AlarmDB = function AlarmDB(aGlobal) {
debug("AlarmDB()");
this._global = aGlobal;
}
AlarmDB.prototype = {
__proto__: IndexedDBHelper.prototype,
init: function init(aGlobal) {
debug("init()");
this.initDBHelper(ALARMDB_NAME, ALARMDB_VERSION, [ALARMSTORE_NAME], aGlobal);
},
upgradeSchema: function upgradeSchema(aTransaction, aDb, aOldVersion, aNewVersion) {
debug("upgradeSchema()");
let objectStore = aDb.createObjectStore(ALARMSTORE_NAME, { keyPath: "id", autoIncrement: true });
objectStore.createIndex("date", "date", { unique: false });
objectStore.createIndex("ignoreTimezone", "ignoreTimezone", { unique: false });
objectStore.createIndex("timezoneOffset", "timezoneOffset", { unique: false });
objectStore.createIndex("data", "data", { unique: false });
objectStore.createIndex("pageURL", "pageURL", { unique: false });
objectStore.createIndex("manifestURL", "manifestURL", { unique: false });
debug("Created object stores and indexes");
},
/**
* @param aAlarm
* The record to be added.
* @param aSuccessCb
* Callback function to invoke with result ID.
* @param aErrorCb [optional]
* Callback function to invoke when there was an error.
*/
add: function add(aAlarm, aSuccessCb, aErrorCb) {
debug("add()");
this.newTxn(
"readwrite",
ALARMSTORE_NAME,
function txnCb(aTxn, aStore) {
debug("Going to add " + JSON.stringify(aAlarm));
aStore.put(aAlarm).onsuccess = function setTxnResult(aEvent) {
aTxn.result = aEvent.target.result;
debug("Request successful. New record ID: " + aTxn.result);
};
},
aSuccessCb,
aErrorCb
);
},
/**
* @param aId
* The ID of record to be removed.
* @param aManifestURL
* The manifest URL of the app that alarm belongs to.
* If null, directly remove the ID record; otherwise,
* need to check if the alarm belongs to this app.
* @param aSuccessCb
* Callback function to invoke with result.
* @param aErrorCb [optional]
* Callback function to invoke when there was an error.
*/
remove: function remove(aId, aManifestURL, aSuccessCb, aErrorCb) {
debug("remove()");
this.newTxn(
"readwrite",
ALARMSTORE_NAME,
function txnCb(aTxn, aStore) {
debug("Going to remove " + aId);
// Look up the existing record and compare the manifestURL
// to see if the alarm to be removed belongs to this app.
aStore.get(aId).onsuccess = function doRemove(aEvent) {
let alarm = aEvent.target.result;
if (!alarm) {
debug("Alarm doesn't exist. No need to remove it.");
return;
}
if (aManifestURL && aManifestURL != alarm.manifestURL) {
debug("Cannot remove the alarm added by other apps.");
return;
}
aStore.delete(aId);
};
},
aSuccessCb,
aErrorCb
);
},
/**
* @param aManifestURL
* The manifest URL of the app that alarms belong to.
* If null, directly return all alarms; otherwise,
* only return the alarms that belong to this app.
* @param aSuccessCb
* Callback function to invoke with result array.
* @param aErrorCb [optional]
* Callback function to invoke when there was an error.
*/
getAll: function getAll(aManifestURL, aSuccessCb, aErrorCb) {
debug("getAll()");
this.newTxn(
"readonly",
ALARMSTORE_NAME,
function txnCb(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = [];
}
let index = aStore.index("manifestURL");
index.mozGetAll(aManifestURL).onsuccess = function setTxnResult(aEvent) {
aTxn.result = aEvent.target.result;
debug("Request successful. Record count: " + aTxn.result.length);
};
},
aSuccessCb,
aErrorCb
);
}
};