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/* 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/. */
var EXPORTED_SYMBOLS = ["CalDeletedItems"];
var { cal } = ChromeUtils.import("resource:///modules/calendar/calUtils.jsm");
var { FileUtils } = ChromeUtils.importESModule("resource://gre/modules/FileUtils.sys.mjs");
/**
* Handles remembering deleted items.
*
* This is (currently) not a real trashcan. Only ids and time deleted is stored.
* Note also that the code doesn't strictly check the calendar of the item,
* except when a calendar id is passed to getDeletedDate.
*/
function CalDeletedItems() {
this.wrappedJSObject = this;
this.completedNotifier = {
handleResult() {},
handleError() {},
handleCompletion() {},
};
}
var calDeletedItemsClassID = Components.ID("{8e6799af-e7e9-4e6c-9a82-a2413e86d8c3}");
var calDeletedItemsInterfaces = [Ci.calIDeletedItems, Ci.nsIObserver, Ci.calIObserver];
CalDeletedItems.prototype = {
classID: calDeletedItemsClassID,
QueryInterface: cal.generateQI(["calIDeletedItems", "nsIObserver", "calIObserver"]),
classInfo: cal.generateCI({
classID: calDeletedItemsClassID,
contractID: "@mozilla.org/calendar/deleted-items-manager;1",
classDescription: "Database containing information about deleted items",
interfaces: calDeletedItemsInterfaces,
flags: Ci.nsIClassInfo.SINGLETON,
}),
DB_SCHEMA_VERSION: 1,
STALE_TIME: (30 * 24 * 60 * 60) / 1000 /* 30 days */,
// To make the tests more failsafe, we have an internal notifier function.
// As the deleted items store is just meant to be a hint, this should not
// be used in real code.
completedNotifier: null,
flush() {
this.ensureStatements();
this.stmtFlush.params.stale_time = cal.dtz.now().nativeTime - this.STALE_TIME;
this.stmtFlush.executeAsync(this.completedNotifier);
},
getDeletedDate(aId, aCalId) {
this.ensureStatements();
let stmt;
if (aCalId) {
stmt = this.stmtGetWithCal;
stmt.params.calId = aCalId;
} else {
stmt = this.stmtGet;
}
stmt.params.id = aId;
try {
if (stmt.executeStep()) {
let date = cal.createDateTime();
date.nativeTime = stmt.row.time_deleted;
return date.getInTimezone(cal.dtz.defaultTimezone);
}
} catch (e) {
cal.ERROR(e);
} finally {
stmt.reset();
}
return null;
},
markDeleted(aItem) {
this.ensureStatements();
this.stmtMarkDelete.params.calId = aItem.calendar.id;
this.stmtMarkDelete.params.id = aItem.id;
this.stmtMarkDelete.params.time = cal.dtz.now().nativeTime;
this.stmtMarkDelete.params.rid = (aItem.recurrenceId && aItem.recurrenceId.nativeTime) || "";
this.stmtMarkDelete.executeAsync(this.completedNotifier);
},
unmarkDeleted(aItem) {
this.ensureStatements();
this.stmtUnmarkDelete.params.id = aItem.id;
this.stmtUnmarkDelete.executeAsync(this.completedNotifier);
},
initDB() {
if (this.mDB) {
// Looks like we've already initialized, exit early
return;
}
let file = FileUtils.getFile("ProfD", ["calendar-data", "deleted.sqlite"]);
this.mDB = Services.storage.openDatabase(file);
// If this database needs changing, please start using a real schema
// management, i.e using PRAGMA user_version and upgrading
if (!this.mDB.tableExists("cal_deleted_items")) {
const v1_schema = "cal_id TEXT, id TEXT, time_deleted INTEGER, recurrence_id INTEGER";
const v1_index =
"CREATE INDEX idx_deleteditems ON cal_deleted_items(id,cal_id,recurrence_id)";
this.mDB.createTable("cal_deleted_items", v1_schema);
this.mDB.executeSimpleSQL(v1_index);
this.mDB.executeSimpleSQL("PRAGMA user_version = 1");
}
// We will not init the statements now, we can still do that the
// first time this interface is used. What we should do though is
// to clean up at shutdown
cal.addShutdownObserver(this.shutdown.bind(this));
},
observe(aSubject, aTopic, aData) {
if (aTopic == "profile-after-change") {
// Make sure to observe calendar changes so we know when things are
// deleted. We don't initialize the statements until first use.
cal.manager.addCalendarObserver(this);
}
},
ensureStatements() {
if (!this.mDB) {
this.initDB();
}
if (!this.stmtMarkDelete) {
let stmt =
"INSERT OR REPLACE INTO cal_deleted_items (cal_id, id, time_deleted, recurrence_id) VALUES(:calId, :id, :time, :rid)";
this.stmtMarkDelete = this.mDB.createStatement(stmt);
}
if (!this.stmtUnmarkDelete) {
let stmt = "DELETE FROM cal_deleted_items WHERE id = :id";
this.stmtUnmarkDelete = this.mDB.createStatement(stmt);
}
if (!this.stmtGetWithCal) {
let stmt = "SELECT time_deleted FROM cal_deleted_items WHERE cal_id = :calId AND id = :id";
this.stmtGetWithCal = this.mDB.createStatement(stmt);
}
if (!this.stmtGet) {
let stmt = "SELECT time_deleted FROM cal_deleted_items WHERE id = :id";
this.stmtGet = this.mDB.createStatement(stmt);
}
if (!this.stmtFlush) {
let stmt = "DELETE FROM cal_deleted_items WHERE time_deleted < :stale_time";
this.stmtFlush = this.mDB.createStatement(stmt);
}
},
shutdown() {
try {
let stmts = [
this.stmtMarkDelete,
this.stmtUnmarkDelete,
this.stmtGet,
this.stmtGetWithCal,
this.stmtFlush,
];
for (let stmt of stmts) {
stmt.finalize();
}
if (this.mDB) {
this.mDB.asyncClose();
this.mDB = null;
}
} catch (e) {
cal.ERROR("Error closing deleted items database: " + e);
}
cal.manager.removeCalendarObserver(this);
},
// calIObserver
onStartBatch() {},
onEndBatch() {},
onModifyItem() {},
onError() {},
onPropertyChanged() {},
onPropertyDeleting() {},
onAddItem(aItem) {
this.unmarkDeleted(aItem);
},
onDeleteItem(aItem) {
this.markDeleted(aItem);
},
onLoad() {
this.flush();
},
};
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