зеркало из https://github.com/mozilla/gecko-dev.git
1154 строки
42 KiB
JavaScript
1154 строки
42 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
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* vim: sw=2 ts=2 sts=2 expandtab filetype=javascript
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cr = Components.results;
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const Cu = Components.utils;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/PlacesUtils.jsm");
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this.EXPORTED_SYMBOLS = [ "PlacesDBUtils" ];
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////////////////////////////////////////////////////////////////////////////////
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//// Constants
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const FINISHED_MAINTENANCE_TOPIC = "places-maintenance-finished";
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const BYTES_PER_MEBIBYTE = 1048576;
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////////////////////////////////////////////////////////////////////////////////
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//// Smart getters
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XPCOMUtils.defineLazyGetter(this, "DBConn", function() {
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return PlacesUtils.history.QueryInterface(Ci.nsPIPlacesDatabase).DBConnection;
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});
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////////////////////////////////////////////////////////////////////////////////
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//// PlacesDBUtils
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this.PlacesDBUtils = {
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/**
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* Executes a list of maintenance tasks.
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* Once finished it will pass a array log to the callback attached to tasks.
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* FINISHED_MAINTENANCE_TOPIC is notified through observer service on finish.
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*
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* @param aTasks
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* Tasks object to execute.
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*/
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_executeTasks: function PDBU__executeTasks(aTasks)
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{
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if (PlacesDBUtils._isShuttingDown) {
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aTasks.log("- We are shutting down. Will not schedule the tasks.");
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aTasks.clear();
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}
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let task = aTasks.pop();
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if (task) {
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task.call(PlacesDBUtils, aTasks);
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}
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else {
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// All tasks have been completed.
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// Telemetry the time it took for maintenance, if a start time exists.
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if (aTasks._telemetryStart) {
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Services.telemetry.getHistogramById("PLACES_IDLE_MAINTENANCE_TIME_MS")
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.add(Date.now() - aTasks._telemetryStart);
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aTasks._telemetryStart = 0;
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}
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if (aTasks.callback) {
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let scope = aTasks.scope || Cu.getGlobalForObject(aTasks.callback);
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aTasks.callback.call(scope, aTasks.messages);
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}
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// Notify observers that maintenance finished.
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Services.obs.notifyObservers(null, FINISHED_MAINTENANCE_TOPIC, null);
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}
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},
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_isShuttingDown : false,
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shutdown: function PDBU_shutdown() {
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PlacesDBUtils._isShuttingDown = true;
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},
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/**
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* Executes integrity check and common maintenance tasks.
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*
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* @param [optional] aCallback
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* Callback to be invoked when done. The callback will get a array
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* of log messages.
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* @param [optional] aScope
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* Scope for the callback.
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*/
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maintenanceOnIdle: function PDBU_maintenanceOnIdle(aCallback, aScope)
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{
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let tasks = new Tasks([
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this.checkIntegrity
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, this.checkCoherence
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, this._refreshUI
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]);
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tasks._telemetryStart = Date.now();
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tasks.callback = function() {
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Services.prefs.setIntPref("places.database.lastMaintenance",
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parseInt(Date.now() / 1000));
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if (aCallback)
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aCallback();
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}
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tasks.scope = aScope;
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this._executeTasks(tasks);
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},
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/**
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* Executes integrity check, common and advanced maintenance tasks (like
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* expiration and vacuum). Will also collect statistics on the database.
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*
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* @param [optional] aCallback
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* Callback to be invoked when done. The callback will get a array
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* of log messages.
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* @param [optional] aScope
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* Scope for the callback.
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*/
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checkAndFixDatabase: function PDBU_checkAndFixDatabase(aCallback, aScope)
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{
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let tasks = new Tasks([
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this.checkIntegrity
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, this.checkCoherence
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, this.expire
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, this.vacuum
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, this.stats
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, this._refreshUI
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]);
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tasks.callback = aCallback;
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tasks.scope = aScope;
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this._executeTasks(tasks);
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},
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/**
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* Forces a full refresh of Places views.
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*
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* @param [optional] aTasks
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* Tasks object to execute.
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*/
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_refreshUI: function PDBU__refreshUI(aTasks)
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{
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let tasks = new Tasks(aTasks);
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// Send batch update notifications to update the UI.
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PlacesUtils.history.runInBatchMode({
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runBatched: function (aUserData) {}
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}, null);
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PlacesDBUtils._executeTasks(tasks);
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},
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_handleError: function PDBU__handleError(aError)
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{
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Cu.reportError("Async statement execution returned with '" +
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aError.result + "', '" + aError.message + "'");
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},
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/**
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* Tries to execute a REINDEX on the database.
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*
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* @param [optional] aTasks
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* Tasks object to execute.
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*/
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reindex: function PDBU_reindex(aTasks)
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{
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let tasks = new Tasks(aTasks);
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tasks.log("> Reindex");
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let stmt = DBConn.createAsyncStatement("REINDEX");
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stmt.executeAsync({
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handleError: PlacesDBUtils._handleError,
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handleResult: function () {},
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handleCompletion: function (aReason)
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{
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if (aReason == Ci.mozIStorageStatementCallback.REASON_FINISHED) {
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tasks.log("+ The database has been reindexed");
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}
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else {
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tasks.log("- Unable to reindex database");
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}
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PlacesDBUtils._executeTasks(tasks);
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}
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});
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stmt.finalize();
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},
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/**
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* Checks integrity but does not try to fix the database through a reindex.
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*
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* @param [optional] aTasks
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* Tasks object to execute.
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*/
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_checkIntegritySkipReindex: function PDBU__checkIntegritySkipReindex(aTasks)
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this.checkIntegrity(aTasks, true),
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/**
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* Checks integrity and tries to fix the database through a reindex.
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*
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* @param [optional] aTasks
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* Tasks object to execute.
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* @param [optional] aSkipdReindex
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* Whether to try to reindex database or not.
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*/
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checkIntegrity: function PDBU_checkIntegrity(aTasks, aSkipReindex)
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{
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let tasks = new Tasks(aTasks);
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tasks.log("> Integrity check");
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// Run a integrity check, but stop at the first error.
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let stmt = DBConn.createAsyncStatement("PRAGMA integrity_check(1)");
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stmt.executeAsync({
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handleError: PlacesDBUtils._handleError,
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_corrupt: false,
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handleResult: function (aResultSet)
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{
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let row = aResultSet.getNextRow();
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this._corrupt = row.getResultByIndex(0) != "ok";
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},
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handleCompletion: function (aReason)
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{
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if (aReason == Ci.mozIStorageStatementCallback.REASON_FINISHED) {
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if (this._corrupt) {
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tasks.log("- The database is corrupt");
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if (aSkipReindex) {
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tasks.log("- Unable to fix corruption, database will be replaced on next startup");
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Services.prefs.setBoolPref("places.database.replaceOnStartup", true);
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tasks.clear();
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}
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else {
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// Try to reindex, this often fixed simple indices corruption.
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// We insert from the top of the queue, they will run inverse.
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tasks.push(PlacesDBUtils._checkIntegritySkipReindex);
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tasks.push(PlacesDBUtils.reindex);
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}
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}
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else {
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tasks.log("+ The database is sane");
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}
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}
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else {
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tasks.log("- Unable to check database status");
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tasks.clear();
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}
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PlacesDBUtils._executeTasks(tasks);
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}
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});
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stmt.finalize();
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},
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/**
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* Checks data coherence and tries to fix most common errors.
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*
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* @param [optional] aTasks
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* Tasks object to execute.
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*/
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checkCoherence: function PDBU_checkCoherence(aTasks)
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{
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let tasks = new Tasks(aTasks);
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tasks.log("> Coherence check");
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let stmts = PlacesDBUtils._getBoundCoherenceStatements();
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DBConn.executeAsync(stmts, stmts.length, {
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handleError: PlacesDBUtils._handleError,
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handleResult: function () {},
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handleCompletion: function (aReason)
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{
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if (aReason == Ci.mozIStorageStatementCallback.REASON_FINISHED) {
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tasks.log("+ The database is coherent");
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}
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else {
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tasks.log("- Unable to check database coherence");
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tasks.clear();
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}
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PlacesDBUtils._executeTasks(tasks);
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}
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});
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stmts.forEach(function (aStmt) aStmt.finalize());
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},
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_getBoundCoherenceStatements: function PDBU__getBoundCoherenceStatements()
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{
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let cleanupStatements = [];
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// MOZ_ANNO_ATTRIBUTES
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// A.1 remove obsolete annotations from moz_annos.
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// The 'weave0' idiom exploits character ordering (0 follows /) to
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// efficiently select all annos with a 'weave/' prefix.
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let deleteObsoleteAnnos = DBConn.createAsyncStatement(
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`DELETE FROM moz_annos
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WHERE anno_attribute_id IN (
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SELECT id FROM moz_anno_attributes
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WHERE name BETWEEN 'weave/' AND 'weave0'
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)`);
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cleanupStatements.push(deleteObsoleteAnnos);
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// A.2 remove obsolete annotations from moz_items_annos.
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let deleteObsoleteItemsAnnos = DBConn.createAsyncStatement(
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`DELETE FROM moz_items_annos
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WHERE anno_attribute_id IN (
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SELECT id FROM moz_anno_attributes
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WHERE name = 'sync/children'
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OR name = 'placesInternal/GUID'
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OR name BETWEEN 'weave/' AND 'weave0'
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)`);
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cleanupStatements.push(deleteObsoleteItemsAnnos);
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// A.3 remove unused attributes.
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let deleteUnusedAnnoAttributes = DBConn.createAsyncStatement(
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`DELETE FROM moz_anno_attributes WHERE id IN (
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SELECT id FROM moz_anno_attributes n
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WHERE NOT EXISTS
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(SELECT id FROM moz_annos WHERE anno_attribute_id = n.id LIMIT 1)
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AND NOT EXISTS
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(SELECT id FROM moz_items_annos WHERE anno_attribute_id = n.id LIMIT 1)
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)`);
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cleanupStatements.push(deleteUnusedAnnoAttributes);
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// MOZ_ANNOS
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// B.1 remove annos with an invalid attribute
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let deleteInvalidAttributeAnnos = DBConn.createAsyncStatement(
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`DELETE FROM moz_annos WHERE id IN (
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SELECT id FROM moz_annos a
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WHERE NOT EXISTS
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(SELECT id FROM moz_anno_attributes
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WHERE id = a.anno_attribute_id LIMIT 1)
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)`);
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cleanupStatements.push(deleteInvalidAttributeAnnos);
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// B.2 remove orphan annos
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let deleteOrphanAnnos = DBConn.createAsyncStatement(
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`DELETE FROM moz_annos WHERE id IN (
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SELECT id FROM moz_annos a
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WHERE NOT EXISTS
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(SELECT id FROM moz_places WHERE id = a.place_id LIMIT 1)
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)`);
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cleanupStatements.push(deleteOrphanAnnos);
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// Bookmarks roots
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// C.1 fix missing Places root
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// Bug 477739 shows a case where the root could be wrongly removed
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// due to an endianness issue. We try to fix broken roots here.
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let selectPlacesRoot = DBConn.createStatement(
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"SELECT id FROM moz_bookmarks WHERE id = :places_root");
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selectPlacesRoot.params["places_root"] = PlacesUtils.placesRootId;
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if (!selectPlacesRoot.executeStep()) {
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// We are missing the root, try to recreate it.
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let createPlacesRoot = DBConn.createAsyncStatement(
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`INSERT INTO moz_bookmarks (id, type, fk, parent, position, title,
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guid)
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VALUES (:places_root, 2, NULL, 0, 0, :title, :guid)`);
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createPlacesRoot.params["places_root"] = PlacesUtils.placesRootId;
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createPlacesRoot.params["title"] = "";
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createPlacesRoot.params["guid"] = PlacesUtils.bookmarks.rootGuid;
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cleanupStatements.push(createPlacesRoot);
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// Now ensure that other roots are children of Places root.
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let fixPlacesRootChildren = DBConn.createAsyncStatement(
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`UPDATE moz_bookmarks SET parent = :places_root WHERE guid IN
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( :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid )`);
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fixPlacesRootChildren.params["places_root"] = PlacesUtils.placesRootId;
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fixPlacesRootChildren.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
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fixPlacesRootChildren.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
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fixPlacesRootChildren.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
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fixPlacesRootChildren.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
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cleanupStatements.push(fixPlacesRootChildren);
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}
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selectPlacesRoot.finalize();
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// C.2 fix roots titles
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// some alpha version has wrong roots title, and this also fixes them if
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// locale has changed.
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let updateRootTitleSql = `UPDATE moz_bookmarks SET title = :title
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WHERE id = :root_id AND title <> :title`;
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// root
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let fixPlacesRootTitle = DBConn.createAsyncStatement(updateRootTitleSql);
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fixPlacesRootTitle.params["root_id"] = PlacesUtils.placesRootId;
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fixPlacesRootTitle.params["title"] = "";
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cleanupStatements.push(fixPlacesRootTitle);
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// bookmarks menu
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let fixBookmarksMenuTitle = DBConn.createAsyncStatement(updateRootTitleSql);
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fixBookmarksMenuTitle.params["root_id"] = PlacesUtils.bookmarksMenuFolderId;
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fixBookmarksMenuTitle.params["title"] =
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PlacesUtils.getString("BookmarksMenuFolderTitle");
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cleanupStatements.push(fixBookmarksMenuTitle);
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// bookmarks toolbar
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let fixBookmarksToolbarTitle = DBConn.createAsyncStatement(updateRootTitleSql);
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fixBookmarksToolbarTitle.params["root_id"] = PlacesUtils.toolbarFolderId;
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fixBookmarksToolbarTitle.params["title"] =
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PlacesUtils.getString("BookmarksToolbarFolderTitle");
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cleanupStatements.push(fixBookmarksToolbarTitle);
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// unsorted bookmarks
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let fixUnsortedBookmarksTitle = DBConn.createAsyncStatement(updateRootTitleSql);
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fixUnsortedBookmarksTitle.params["root_id"] = PlacesUtils.unfiledBookmarksFolderId;
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fixUnsortedBookmarksTitle.params["title"] =
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PlacesUtils.getString("UnsortedBookmarksFolderTitle");
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cleanupStatements.push(fixUnsortedBookmarksTitle);
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// tags
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let fixTagsRootTitle = DBConn.createAsyncStatement(updateRootTitleSql);
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fixTagsRootTitle.params["root_id"] = PlacesUtils.tagsFolderId;
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fixTagsRootTitle.params["title"] =
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PlacesUtils.getString("TagsFolderTitle");
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cleanupStatements.push(fixTagsRootTitle);
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// MOZ_BOOKMARKS
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// D.1 remove items without a valid place
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// if fk IS NULL we fix them in D.7
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let deleteNoPlaceItems = DBConn.createAsyncStatement(
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`DELETE FROM moz_bookmarks WHERE guid NOT IN (
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:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
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) AND id IN (
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SELECT b.id FROM moz_bookmarks b
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WHERE fk NOT NULL AND b.type = :bookmark_type
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AND NOT EXISTS (SELECT url FROM moz_places WHERE id = b.fk LIMIT 1)
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)`);
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deleteNoPlaceItems.params["bookmark_type"] = PlacesUtils.bookmarks.TYPE_BOOKMARK;
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deleteNoPlaceItems.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
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deleteNoPlaceItems.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
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deleteNoPlaceItems.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
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deleteNoPlaceItems.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
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deleteNoPlaceItems.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
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cleanupStatements.push(deleteNoPlaceItems);
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// D.2 remove items that are not uri bookmarks from tag containers
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let deleteBogusTagChildren = DBConn.createAsyncStatement(
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`DELETE FROM moz_bookmarks WHERE guid NOT IN (
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:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
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) AND id IN (
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SELECT b.id FROM moz_bookmarks b
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WHERE b.parent IN
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(SELECT id FROM moz_bookmarks WHERE parent = :tags_folder)
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AND b.type <> :bookmark_type
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)`);
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deleteBogusTagChildren.params["tags_folder"] = PlacesUtils.tagsFolderId;
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deleteBogusTagChildren.params["bookmark_type"] = PlacesUtils.bookmarks.TYPE_BOOKMARK;
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deleteBogusTagChildren.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
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deleteBogusTagChildren.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
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deleteBogusTagChildren.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
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deleteBogusTagChildren.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
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deleteBogusTagChildren.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
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cleanupStatements.push(deleteBogusTagChildren);
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// D.3 remove empty tags
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let deleteEmptyTags = DBConn.createAsyncStatement(
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`DELETE FROM moz_bookmarks WHERE guid NOT IN (
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:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
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) AND id IN (
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SELECT b.id FROM moz_bookmarks b
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WHERE b.id IN
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(SELECT id FROM moz_bookmarks WHERE parent = :tags_folder)
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AND NOT EXISTS
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(SELECT id from moz_bookmarks WHERE parent = b.id LIMIT 1)
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)`);
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deleteEmptyTags.params["tags_folder"] = PlacesUtils.tagsFolderId;
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deleteEmptyTags.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
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deleteEmptyTags.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
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deleteEmptyTags.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
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deleteEmptyTags.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
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deleteEmptyTags.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
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cleanupStatements.push(deleteEmptyTags);
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// D.4 move orphan items to unsorted folder
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let fixOrphanItems = DBConn.createAsyncStatement(
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`UPDATE moz_bookmarks SET parent = :unsorted_folder WHERE guid NOT IN (
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:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
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) AND id IN (
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SELECT b.id FROM moz_bookmarks b
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WHERE NOT EXISTS
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(SELECT id FROM moz_bookmarks WHERE id = b.parent LIMIT 1)
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)`);
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fixOrphanItems.params["unsorted_folder"] = PlacesUtils.unfiledBookmarksFolderId;
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fixOrphanItems.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
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fixOrphanItems.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
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fixOrphanItems.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
|
|
fixOrphanItems.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
|
|
fixOrphanItems.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
|
|
cleanupStatements.push(fixOrphanItems);
|
|
|
|
// D.6 fix wrong item types
|
|
// Folders and separators should not have an fk.
|
|
// If they have a valid fk convert them to bookmarks. Later in D.9 we
|
|
// will move eventual children to unsorted bookmarks.
|
|
let fixBookmarksAsFolders = DBConn.createAsyncStatement(
|
|
`UPDATE moz_bookmarks SET type = :bookmark_type WHERE guid NOT IN (
|
|
:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
|
|
) AND id IN (
|
|
SELECT id FROM moz_bookmarks b
|
|
WHERE type IN (:folder_type, :separator_type)
|
|
AND fk NOTNULL
|
|
)`);
|
|
fixBookmarksAsFolders.params["bookmark_type"] = PlacesUtils.bookmarks.TYPE_BOOKMARK;
|
|
fixBookmarksAsFolders.params["folder_type"] = PlacesUtils.bookmarks.TYPE_FOLDER;
|
|
fixBookmarksAsFolders.params["separator_type"] = PlacesUtils.bookmarks.TYPE_SEPARATOR;
|
|
fixBookmarksAsFolders.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
|
|
fixBookmarksAsFolders.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
|
|
fixBookmarksAsFolders.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
|
|
fixBookmarksAsFolders.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
|
|
fixBookmarksAsFolders.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
|
|
cleanupStatements.push(fixBookmarksAsFolders);
|
|
|
|
// D.7 fix wrong item types
|
|
// Bookmarks should have an fk, if they don't have any, convert them to
|
|
// folders.
|
|
let fixFoldersAsBookmarks = DBConn.createAsyncStatement(
|
|
`UPDATE moz_bookmarks SET type = :folder_type WHERE guid NOT IN (
|
|
:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
|
|
) AND id IN (
|
|
SELECT id FROM moz_bookmarks b
|
|
WHERE type = :bookmark_type
|
|
AND fk IS NULL
|
|
)`);
|
|
fixFoldersAsBookmarks.params["bookmark_type"] = PlacesUtils.bookmarks.TYPE_BOOKMARK;
|
|
fixFoldersAsBookmarks.params["folder_type"] = PlacesUtils.bookmarks.TYPE_FOLDER;
|
|
fixFoldersAsBookmarks.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
|
|
fixFoldersAsBookmarks.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
|
|
fixFoldersAsBookmarks.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
|
|
fixFoldersAsBookmarks.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
|
|
fixFoldersAsBookmarks.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
|
|
cleanupStatements.push(fixFoldersAsBookmarks);
|
|
|
|
// D.9 fix wrong parents
|
|
// Items cannot have separators or other bookmarks
|
|
// as parent, if they have bad parent move them to unsorted bookmarks.
|
|
let fixInvalidParents = DBConn.createAsyncStatement(
|
|
`UPDATE moz_bookmarks SET parent = :unsorted_folder WHERE guid NOT IN (
|
|
:rootGuid, :menuGuid, :toolbarGuid, :unfiledGuid, :tagsGuid /* skip roots */
|
|
) AND id IN (
|
|
SELECT id FROM moz_bookmarks b
|
|
WHERE EXISTS
|
|
(SELECT id FROM moz_bookmarks WHERE id = b.parent
|
|
AND type IN (:bookmark_type, :separator_type)
|
|
LIMIT 1)
|
|
)`);
|
|
fixInvalidParents.params["unsorted_folder"] = PlacesUtils.unfiledBookmarksFolderId;
|
|
fixInvalidParents.params["bookmark_type"] = PlacesUtils.bookmarks.TYPE_BOOKMARK;
|
|
fixInvalidParents.params["separator_type"] = PlacesUtils.bookmarks.TYPE_SEPARATOR;
|
|
fixInvalidParents.params["rootGuid"] = PlacesUtils.bookmarks.rootGuid;
|
|
fixInvalidParents.params["menuGuid"] = PlacesUtils.bookmarks.menuGuid;
|
|
fixInvalidParents.params["toolbarGuid"] = PlacesUtils.bookmarks.toolbarGuid;
|
|
fixInvalidParents.params["unfiledGuid"] = PlacesUtils.bookmarks.unfiledGuid;
|
|
fixInvalidParents.params["tagsGuid"] = PlacesUtils.bookmarks.tagsGuid;
|
|
cleanupStatements.push(fixInvalidParents);
|
|
|
|
// D.10 recalculate positions
|
|
// This requires multiple related statements.
|
|
// We can detect a folder with bad position values comparing the sum of
|
|
// all distinct position values (+1 since position is 0-based) with the
|
|
// triangular numbers obtained by the number of children (n).
|
|
// SUM(DISTINCT position + 1) == (n * (n + 1) / 2).
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
`CREATE TEMP TABLE IF NOT EXISTS moz_bm_reindex_temp (
|
|
id INTEGER PRIMARY_KEY
|
|
, parent INTEGER
|
|
, position INTEGER
|
|
)`
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
`INSERT INTO moz_bm_reindex_temp
|
|
SELECT id, parent, 0
|
|
FROM moz_bookmarks b
|
|
WHERE parent IN (
|
|
SELECT parent
|
|
FROM moz_bookmarks
|
|
GROUP BY parent
|
|
HAVING (SUM(DISTINCT position + 1) - (count(*) * (count(*) + 1) / 2)) <> 0
|
|
)
|
|
ORDER BY parent ASC, position ASC, ROWID ASC`
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
`CREATE INDEX IF NOT EXISTS moz_bm_reindex_temp_index
|
|
ON moz_bm_reindex_temp(parent)`
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
`UPDATE moz_bm_reindex_temp SET position = (
|
|
ROWID - (SELECT MIN(t.ROWID) FROM moz_bm_reindex_temp t
|
|
WHERE t.parent = moz_bm_reindex_temp.parent)
|
|
)`
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
`CREATE TEMP TRIGGER IF NOT EXISTS moz_bm_reindex_temp_trigger
|
|
BEFORE DELETE ON moz_bm_reindex_temp
|
|
FOR EACH ROW
|
|
BEGIN
|
|
UPDATE moz_bookmarks SET position = OLD.position WHERE id = OLD.id;
|
|
END`
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
"DELETE FROM moz_bm_reindex_temp "
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
"DROP INDEX moz_bm_reindex_temp_index "
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
"DROP TRIGGER moz_bm_reindex_temp_trigger "
|
|
));
|
|
cleanupStatements.push(DBConn.createAsyncStatement(
|
|
"DROP TABLE moz_bm_reindex_temp "
|
|
));
|
|
|
|
// D.12 Fix empty-named tags.
|
|
// Tags were allowed to have empty names due to a UI bug. Fix them
|
|
// replacing their title with "(notitle)".
|
|
let fixEmptyNamedTags = DBConn.createAsyncStatement(
|
|
`UPDATE moz_bookmarks SET title = :empty_title
|
|
WHERE length(title) = 0 AND type = :folder_type
|
|
AND parent = :tags_folder`
|
|
);
|
|
fixEmptyNamedTags.params["empty_title"] = "(notitle)";
|
|
fixEmptyNamedTags.params["folder_type"] = PlacesUtils.bookmarks.TYPE_FOLDER;
|
|
fixEmptyNamedTags.params["tags_folder"] = PlacesUtils.tagsFolderId;
|
|
cleanupStatements.push(fixEmptyNamedTags);
|
|
|
|
// MOZ_FAVICONS
|
|
// E.1 remove orphan icons
|
|
let deleteOrphanIcons = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_favicons WHERE id IN (
|
|
SELECT id FROM moz_favicons f
|
|
WHERE NOT EXISTS
|
|
(SELECT id FROM moz_places WHERE favicon_id = f.id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(deleteOrphanIcons);
|
|
|
|
// MOZ_HISTORYVISITS
|
|
// F.1 remove orphan visits
|
|
let deleteOrphanVisits = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_historyvisits WHERE id IN (
|
|
SELECT id FROM moz_historyvisits v
|
|
WHERE NOT EXISTS
|
|
(SELECT id FROM moz_places WHERE id = v.place_id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(deleteOrphanVisits);
|
|
|
|
// MOZ_INPUTHISTORY
|
|
// G.1 remove orphan input history
|
|
let deleteOrphanInputHistory = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_inputhistory WHERE place_id IN (
|
|
SELECT place_id FROM moz_inputhistory i
|
|
WHERE NOT EXISTS
|
|
(SELECT id FROM moz_places WHERE id = i.place_id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(deleteOrphanInputHistory);
|
|
|
|
// MOZ_ITEMS_ANNOS
|
|
// H.1 remove item annos with an invalid attribute
|
|
let deleteInvalidAttributeItemsAnnos = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_items_annos WHERE id IN (
|
|
SELECT id FROM moz_items_annos t
|
|
WHERE NOT EXISTS
|
|
(SELECT id FROM moz_anno_attributes
|
|
WHERE id = t.anno_attribute_id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(deleteInvalidAttributeItemsAnnos);
|
|
|
|
// H.2 remove orphan item annos
|
|
let deleteOrphanItemsAnnos = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_items_annos WHERE id IN (
|
|
SELECT id FROM moz_items_annos t
|
|
WHERE NOT EXISTS
|
|
(SELECT id FROM moz_bookmarks WHERE id = t.item_id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(deleteOrphanItemsAnnos);
|
|
|
|
// MOZ_KEYWORDS
|
|
// I.1 remove unused keywords
|
|
let deleteUnusedKeywords = DBConn.createAsyncStatement(
|
|
`DELETE FROM moz_keywords WHERE id IN (
|
|
SELECT id FROM moz_keywords k
|
|
WHERE NOT EXISTS
|
|
(SELECT 1 FROM moz_places h WHERE k.place_id = h.id)
|
|
)`);
|
|
cleanupStatements.push(deleteUnusedKeywords);
|
|
|
|
// MOZ_PLACES
|
|
// L.1 fix wrong favicon ids
|
|
let fixInvalidFaviconIds = DBConn.createAsyncStatement(
|
|
`UPDATE moz_places SET favicon_id = NULL WHERE id IN (
|
|
SELECT id FROM moz_places h
|
|
WHERE favicon_id NOT NULL
|
|
AND NOT EXISTS
|
|
(SELECT id FROM moz_favicons WHERE id = h.favicon_id LIMIT 1)
|
|
)`);
|
|
cleanupStatements.push(fixInvalidFaviconIds);
|
|
|
|
// L.2 recalculate visit_count and last_visit_date
|
|
let fixVisitStats = DBConn.createAsyncStatement(
|
|
`UPDATE moz_places
|
|
SET visit_count = (SELECT count(*) FROM moz_historyvisits
|
|
WHERE place_id = moz_places.id AND visit_type NOT IN (0,4,7,8)),
|
|
last_visit_date = (SELECT MAX(visit_date) FROM moz_historyvisits
|
|
WHERE place_id = moz_places.id)
|
|
WHERE id IN (
|
|
SELECT h.id FROM moz_places h
|
|
WHERE visit_count <> (SELECT count(*) FROM moz_historyvisits v
|
|
WHERE v.place_id = h.id AND visit_type NOT IN (0,4,7,8))
|
|
OR last_visit_date <> (SELECT MAX(visit_date) FROM moz_historyvisits v
|
|
WHERE v.place_id = h.id)
|
|
)`);
|
|
cleanupStatements.push(fixVisitStats);
|
|
|
|
// L.3 recalculate hidden for redirects.
|
|
let fixRedirectsHidden = DBConn.createAsyncStatement(
|
|
`UPDATE moz_places
|
|
SET hidden = 1
|
|
WHERE id IN (
|
|
SELECT h.id FROM moz_places h
|
|
JOIN moz_historyvisits src ON src.place_id = h.id
|
|
JOIN moz_historyvisits dst ON dst.from_visit = src.id AND dst.visit_type IN (5,6)
|
|
LEFT JOIN moz_bookmarks on fk = h.id AND fk ISNULL
|
|
GROUP BY src.place_id HAVING count(*) = visit_count
|
|
)`);
|
|
cleanupStatements.push(fixRedirectsHidden);
|
|
|
|
// L.4 recalculate foreign_count.
|
|
let fixForeignCount = DBConn.createAsyncStatement(
|
|
`UPDATE moz_places SET foreign_count =
|
|
(SELECT count(*) FROM moz_bookmarks WHERE fk = moz_places.id )`);
|
|
cleanupStatements.push(fixForeignCount);
|
|
|
|
// MAINTENANCE STATEMENTS SHOULD GO ABOVE THIS POINT!
|
|
|
|
return cleanupStatements;
|
|
},
|
|
|
|
/**
|
|
* Tries to vacuum the database.
|
|
*
|
|
* @param [optional] aTasks
|
|
* Tasks object to execute.
|
|
*/
|
|
vacuum: function PDBU_vacuum(aTasks)
|
|
{
|
|
let tasks = new Tasks(aTasks);
|
|
tasks.log("> Vacuum");
|
|
|
|
let DBFile = Services.dirsvc.get("ProfD", Ci.nsILocalFile);
|
|
DBFile.append("places.sqlite");
|
|
tasks.log("Initial database size is " +
|
|
parseInt(DBFile.fileSize / 1024) + " KiB");
|
|
|
|
let stmt = DBConn.createAsyncStatement("VACUUM");
|
|
stmt.executeAsync({
|
|
handleError: PlacesDBUtils._handleError,
|
|
handleResult: function () {},
|
|
|
|
handleCompletion: function (aReason)
|
|
{
|
|
if (aReason == Ci.mozIStorageStatementCallback.REASON_FINISHED) {
|
|
tasks.log("+ The database has been vacuumed");
|
|
let vacuumedDBFile = Services.dirsvc.get("ProfD", Ci.nsILocalFile);
|
|
vacuumedDBFile.append("places.sqlite");
|
|
tasks.log("Final database size is " +
|
|
parseInt(vacuumedDBFile.fileSize / 1024) + " KiB");
|
|
}
|
|
else {
|
|
tasks.log("- Unable to vacuum database");
|
|
tasks.clear();
|
|
}
|
|
|
|
PlacesDBUtils._executeTasks(tasks);
|
|
}
|
|
});
|
|
stmt.finalize();
|
|
},
|
|
|
|
/**
|
|
* Forces a full expiration on the database.
|
|
*
|
|
* @param [optional] aTasks
|
|
* Tasks object to execute.
|
|
*/
|
|
expire: function PDBU_expire(aTasks)
|
|
{
|
|
let tasks = new Tasks(aTasks);
|
|
tasks.log("> Orphans expiration");
|
|
|
|
let expiration = Cc["@mozilla.org/places/expiration;1"].
|
|
getService(Ci.nsIObserver);
|
|
|
|
Services.obs.addObserver(function (aSubject, aTopic, aData) {
|
|
Services.obs.removeObserver(arguments.callee, aTopic);
|
|
tasks.log("+ Database cleaned up");
|
|
PlacesDBUtils._executeTasks(tasks);
|
|
}, PlacesUtils.TOPIC_EXPIRATION_FINISHED, false);
|
|
|
|
// Force an orphans expiration step.
|
|
expiration.observe(null, "places-debug-start-expiration", 0);
|
|
},
|
|
|
|
/**
|
|
* Collects statistical data on the database.
|
|
*
|
|
* @param [optional] aTasks
|
|
* Tasks object to execute.
|
|
*/
|
|
stats: function PDBU_stats(aTasks)
|
|
{
|
|
let tasks = new Tasks(aTasks);
|
|
tasks.log("> Statistics");
|
|
|
|
let DBFile = Services.dirsvc.get("ProfD", Ci.nsILocalFile);
|
|
DBFile.append("places.sqlite");
|
|
tasks.log("Database size is " + parseInt(DBFile.fileSize / 1024) + " KiB");
|
|
|
|
[ "user_version"
|
|
, "page_size"
|
|
, "cache_size"
|
|
, "journal_mode"
|
|
, "synchronous"
|
|
].forEach(function (aPragma) {
|
|
let stmt = DBConn.createStatement("PRAGMA " + aPragma);
|
|
stmt.executeStep();
|
|
tasks.log(aPragma + " is " + stmt.getString(0));
|
|
stmt.finalize();
|
|
});
|
|
|
|
// Get maximum number of unique URIs.
|
|
try {
|
|
let limitURIs = Services.prefs.getIntPref(
|
|
"places.history.expiration.transient_current_max_pages");
|
|
tasks.log("History can store a maximum of " + limitURIs + " unique pages");
|
|
} catch(ex) {}
|
|
|
|
let stmt = DBConn.createStatement(
|
|
"SELECT name FROM sqlite_master WHERE type = :type");
|
|
stmt.params.type = "table";
|
|
while (stmt.executeStep()) {
|
|
let tableName = stmt.getString(0);
|
|
let countStmt = DBConn.createStatement(
|
|
`SELECT count(*) FROM ${tableName}`);
|
|
countStmt.executeStep();
|
|
tasks.log("Table " + tableName + " has " + countStmt.getInt32(0) + " records");
|
|
countStmt.finalize();
|
|
}
|
|
stmt.reset();
|
|
|
|
stmt.params.type = "index";
|
|
while (stmt.executeStep()) {
|
|
tasks.log("Index " + stmt.getString(0));
|
|
}
|
|
stmt.reset();
|
|
|
|
stmt.params.type = "trigger";
|
|
while (stmt.executeStep()) {
|
|
tasks.log("Trigger " + stmt.getString(0));
|
|
}
|
|
stmt.finalize();
|
|
|
|
PlacesDBUtils._executeTasks(tasks);
|
|
},
|
|
|
|
/**
|
|
* Collects telemetry data.
|
|
*
|
|
* There are essentially two modes of collection and the mode is
|
|
* determined by the presence of aHealthReportCallback. If
|
|
* aHealthReportCallback is not defined (the default) then we are in
|
|
* "Telemetry" mode. Results will be reported to Telemetry. If we are
|
|
* in "Health Report" mode only the probes with a true healthreport
|
|
* flag will be collected and the results will be reported to the
|
|
* aHealthReportCallback.
|
|
*
|
|
* @param [optional] aTasks
|
|
* Tasks object to execute.
|
|
* @param [optional] aHealthReportCallback
|
|
* Function to receive data relevant for Firefox Health Report.
|
|
*/
|
|
telemetry: function PDBU_telemetry(aTasks, aHealthReportCallback=null)
|
|
{
|
|
let tasks = new Tasks(aTasks);
|
|
|
|
let isTelemetry = !aHealthReportCallback;
|
|
|
|
// This will be populated with one integer property for each probe result,
|
|
// using the histogram name as key.
|
|
let probeValues = {};
|
|
|
|
// The following array contains an ordered list of entries that are
|
|
// processed to collect telemetry data. Each entry has these properties:
|
|
//
|
|
// histogram: Name of the telemetry histogram to update.
|
|
// query: This is optional. If present, contains a database command
|
|
// that will be executed asynchronously, and whose result will
|
|
// be added to the telemetry histogram.
|
|
// callback: This is optional. If present, contains a function that must
|
|
// return the value that will be added to the telemetry
|
|
// histogram. If a query is also present, its result is passed
|
|
// as the first argument of the function. If the function
|
|
// raises an exception, no data is added to the histogram.
|
|
// healthreport: Boolean indicating whether this probe is relevant
|
|
// to Firefox Health Report.
|
|
//
|
|
// Since all queries are executed in order by the database backend, the
|
|
// callbacks can also use the result of previous queries stored in the
|
|
// probeValues object.
|
|
let probes = [
|
|
{ histogram: "PLACES_PAGES_COUNT",
|
|
healthreport: true,
|
|
query: "SELECT count(*) FROM moz_places" },
|
|
|
|
{ histogram: "PLACES_BOOKMARKS_COUNT",
|
|
healthreport: true,
|
|
query: `SELECT count(*) FROM moz_bookmarks b
|
|
JOIN moz_bookmarks t ON t.id = b.parent
|
|
AND t.parent <> :tags_folder
|
|
WHERE b.type = :type_bookmark` },
|
|
|
|
{ histogram: "PLACES_TAGS_COUNT",
|
|
query: `SELECT count(*) FROM moz_bookmarks
|
|
WHERE parent = :tags_folder` },
|
|
|
|
{ histogram: "PLACES_KEYWORDS_COUNT",
|
|
query: "SELECT count(*) FROM moz_keywords" },
|
|
|
|
{ histogram: "PLACES_SORTED_BOOKMARKS_PERC",
|
|
query: `SELECT IFNULL(ROUND((
|
|
SELECT count(*) FROM moz_bookmarks b
|
|
JOIN moz_bookmarks t ON t.id = b.parent
|
|
AND t.parent <> :tags_folder AND t.parent > :places_root
|
|
WHERE b.type = :type_bookmark
|
|
) * 100 / (
|
|
SELECT count(*) FROM moz_bookmarks b
|
|
JOIN moz_bookmarks t ON t.id = b.parent
|
|
AND t.parent <> :tags_folder
|
|
WHERE b.type = :type_bookmark
|
|
)), 0)` },
|
|
|
|
{ histogram: "PLACES_TAGGED_BOOKMARKS_PERC",
|
|
query: `SELECT IFNULL(ROUND((
|
|
SELECT count(*) FROM moz_bookmarks b
|
|
JOIN moz_bookmarks t ON t.id = b.parent
|
|
AND t.parent = :tags_folder
|
|
) * 100 / (
|
|
SELECT count(*) FROM moz_bookmarks b
|
|
JOIN moz_bookmarks t ON t.id = b.parent
|
|
AND t.parent <> :tags_folder
|
|
WHERE b.type = :type_bookmark
|
|
)), 0)` },
|
|
|
|
{ histogram: "PLACES_DATABASE_FILESIZE_MB",
|
|
callback: function () {
|
|
let DBFile = Services.dirsvc.get("ProfD", Ci.nsILocalFile);
|
|
DBFile.append("places.sqlite");
|
|
return parseInt(DBFile.fileSize / BYTES_PER_MEBIBYTE);
|
|
}
|
|
},
|
|
|
|
{ histogram: "PLACES_DATABASE_PAGESIZE_B",
|
|
query: "PRAGMA page_size /* PlacesDBUtils.jsm PAGESIZE_B */" },
|
|
|
|
{ histogram: "PLACES_DATABASE_SIZE_PER_PAGE_B",
|
|
query: "PRAGMA page_count",
|
|
callback: function (aDbPageCount) {
|
|
// Note that the database file size would not be meaningful for this
|
|
// calculation, because the file grows in fixed-size chunks.
|
|
let dbPageSize = probeValues.PLACES_DATABASE_PAGESIZE_B;
|
|
let placesPageCount = probeValues.PLACES_PAGES_COUNT;
|
|
return Math.round((dbPageSize * aDbPageCount) / placesPageCount);
|
|
}
|
|
},
|
|
|
|
{ histogram: "PLACES_ANNOS_BOOKMARKS_COUNT",
|
|
query: "SELECT count(*) FROM moz_items_annos" },
|
|
|
|
{ histogram: "PLACES_ANNOS_PAGES_COUNT",
|
|
query: "SELECT count(*) FROM moz_annos" },
|
|
|
|
{ histogram: "PLACES_MAINTENANCE_DAYSFROMLAST",
|
|
callback: function () {
|
|
try {
|
|
let lastMaintenance = Services.prefs.getIntPref("places.database.lastMaintenance");
|
|
let nowSeconds = parseInt(Date.now() / 1000);
|
|
return parseInt((nowSeconds - lastMaintenance) / 86400);
|
|
} catch (ex) {
|
|
return 60;
|
|
}
|
|
}
|
|
},
|
|
];
|
|
|
|
let params = {
|
|
tags_folder: PlacesUtils.tagsFolderId,
|
|
type_folder: PlacesUtils.bookmarks.TYPE_FOLDER,
|
|
type_bookmark: PlacesUtils.bookmarks.TYPE_BOOKMARK,
|
|
places_root: PlacesUtils.placesRootId
|
|
};
|
|
|
|
let outstandingProbes = [];
|
|
|
|
for (let i = 0; i < probes.length; i++) {
|
|
let probe = probes[i];
|
|
|
|
if (!isTelemetry && !probe.healthreport) {
|
|
continue;
|
|
}
|
|
|
|
let promiseDone = new Promise((resolve, reject) => {
|
|
if (!("query" in probe)) {
|
|
resolve([probe]);
|
|
return;
|
|
}
|
|
|
|
let stmt = DBConn.createAsyncStatement(probe.query);
|
|
for (let param in params) {
|
|
if (probe.query.indexOf(":" + param) > 0) {
|
|
stmt.params[param] = params[param];
|
|
}
|
|
}
|
|
|
|
try {
|
|
stmt.executeAsync({
|
|
handleError: reject,
|
|
handleResult: function (aResultSet) {
|
|
let row = aResultSet.getNextRow();
|
|
resolve([probe, row.getResultByIndex(0)]);
|
|
},
|
|
handleCompletion: function () {}
|
|
});
|
|
} finally{
|
|
stmt.finalize();
|
|
}
|
|
});
|
|
|
|
// Report the result of the probe through Telemetry.
|
|
// The resulting promise cannot reject.
|
|
promiseDone = promiseDone.then(
|
|
// On success
|
|
([aProbe, aValue]) => {
|
|
let value = aValue;
|
|
try {
|
|
if ("callback" in aProbe) {
|
|
value = aProbe.callback(value);
|
|
}
|
|
probeValues[aProbe.histogram] = value;
|
|
Services.telemetry.getHistogramById(aProbe.histogram).add(value);
|
|
} catch (ex) {
|
|
Components.utils.reportError("Error adding value " + value +
|
|
" to histogram " + aProbe.histogram +
|
|
": " + ex);
|
|
}
|
|
},
|
|
// On failure
|
|
this._handleError);
|
|
|
|
outstandingProbes.push(promiseDone);
|
|
}
|
|
|
|
if (aHealthReportCallback) {
|
|
Promise.all(outstandingProbes).then(() =>
|
|
aHealthReportCallback(probeValues)
|
|
);
|
|
}
|
|
|
|
PlacesDBUtils._executeTasks(tasks);
|
|
},
|
|
|
|
/**
|
|
* Runs a list of tasks, notifying log messages to the callback.
|
|
*
|
|
* @param aTasks
|
|
* Array of tasks to be executed, in form of pointers to methods in
|
|
* this module.
|
|
* @param [optional] aCallback
|
|
* Callback to be invoked when done. It will receive an array of
|
|
* log messages.
|
|
*/
|
|
runTasks: function PDBU_runTasks(aTasks, aCallback) {
|
|
let tasks = new Tasks(aTasks);
|
|
tasks.callback = aCallback;
|
|
PlacesDBUtils._executeTasks(tasks);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* LIFO tasks stack.
|
|
*
|
|
* @param [optional] aTasks
|
|
* Array of tasks or another Tasks object to clone.
|
|
*/
|
|
function Tasks(aTasks)
|
|
{
|
|
if (aTasks) {
|
|
if (Array.isArray(aTasks)) {
|
|
this._list = aTasks.slice(0, aTasks.length);
|
|
}
|
|
// This supports passing in a Tasks-like object, with a "list" property,
|
|
// for compatibility reasons.
|
|
else if (typeof(aTasks) == "object" &&
|
|
(Tasks instanceof Tasks || "list" in aTasks)) {
|
|
this._list = aTasks.list;
|
|
this._log = aTasks.messages;
|
|
this.callback = aTasks.callback;
|
|
this.scope = aTasks.scope;
|
|
this._telemetryStart = aTasks._telemetryStart;
|
|
}
|
|
}
|
|
}
|
|
|
|
Tasks.prototype = {
|
|
_list: [],
|
|
_log: [],
|
|
callback: null,
|
|
scope: null,
|
|
_telemetryStart: 0,
|
|
|
|
/**
|
|
* Adds a task to the top of the list.
|
|
*
|
|
* @param aNewElt
|
|
* Task to be added.
|
|
*/
|
|
push: function T_push(aNewElt)
|
|
{
|
|
this._list.unshift(aNewElt);
|
|
},
|
|
|
|
/**
|
|
* Returns and consumes next task.
|
|
*
|
|
* @return next task or undefined if no task is left.
|
|
*/
|
|
pop: function T_pop() this._list.shift(),
|
|
|
|
/**
|
|
* Removes all tasks.
|
|
*/
|
|
clear: function T_clear()
|
|
{
|
|
this._list.length = 0;
|
|
},
|
|
|
|
/**
|
|
* Returns array of tasks ordered from the next to be run to the latest.
|
|
*/
|
|
get list() this._list.slice(0, this._list.length),
|
|
|
|
/**
|
|
* Adds a message to the log.
|
|
*
|
|
* @param aMsg
|
|
* String message to be added.
|
|
*/
|
|
log: function T_log(aMsg)
|
|
{
|
|
this._log.push(aMsg);
|
|
},
|
|
|
|
/**
|
|
* Returns array of log messages ordered from oldest to newest.
|
|
*/
|
|
get messages() this._log.slice(0, this._log.length),
|
|
}
|