2011-06-01 23:08:05 +00:00
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// SparkleShare, a collaboration and sharing tool.
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2011-05-19 16:05:58 +00:00
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// Copyright (C) 2010 Hylke Bons <hylkebons@gmail.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text.RegularExpressions;
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using System.Timers;
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2011-05-20 00:55:49 +00:00
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using System.Xml;
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2011-05-19 16:05:58 +00:00
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namespace SparkleLib {
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public enum SyncStatus {
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Idle,
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SyncUp,
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SyncDown,
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Error
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}
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public abstract class SparkleRepoBase {
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private FileSystemWatcher watcher;
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private SparkleListenerBase listener;
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2011-06-09 20:20:57 +00:00
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private Timer local_timer = new Timer () { Interval = 0.25 * 1000 };
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private Timer remote_timer = new Timer () { Interval = 10 * 1000 };
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2011-06-09 17:53:36 +00:00
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private DateTime last_poll = DateTime.Now;
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private TimeSpan poll_interval = new TimeSpan (0, 0, 10, 0);
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2011-05-19 16:05:58 +00:00
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private List <double> sizebuffer = new List<double> ();
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2011-06-09 17:53:36 +00:00
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private bool has_changed = false;
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private Object change_lock = new Object ();
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2011-05-19 16:05:58 +00:00
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2011-06-02 23:35:51 +00:00
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protected SyncStatus status;
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protected bool is_buffering = false;
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protected bool server_online = true;
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public readonly SparkleBackend Backend;
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public readonly string LocalPath;
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public readonly string Name;
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2011-05-19 16:05:58 +00:00
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public abstract bool AnyDifferences { get; }
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public abstract string Identifier { get; }
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public abstract string CurrentRevision { get; }
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public abstract bool SyncUp ();
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public abstract bool SyncDown ();
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public abstract bool HasUnsyncedChanges { get; set; }
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public delegate void SyncStatusChangedEventHandler (SyncStatus new_status);
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public event SyncStatusChangedEventHandler SyncStatusChanged;
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public delegate void NewChangeSetEventHandler (SparkleChangeSet change_set, string source_path);
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public event NewChangeSetEventHandler NewChangeSet;
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2011-05-22 14:46:15 +00:00
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public delegate void ConflictResolvedEventHandler ();
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2011-05-19 16:05:58 +00:00
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public event ConflictResolvedEventHandler ConflictResolved;
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2011-05-22 14:46:15 +00:00
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public delegate void ChangesDetectedEventHandler ();
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2011-05-19 16:05:58 +00:00
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public event ChangesDetectedEventHandler ChangesDetected;
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public SparkleRepoBase (string path, SparkleBackend backend)
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{
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LocalPath = path;
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Name = Path.GetFileName (LocalPath);
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Backend = backend;
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SyncStatusChanged += delegate (SyncStatus status) {
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this.status = status;
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};
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if (CurrentRevision == null) {
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CreateInitialChangeSet ();
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2011-05-23 03:06:07 +00:00
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HasUnsyncedChanges = true;
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2011-05-19 16:05:58 +00:00
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}
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2011-05-20 00:55:49 +00:00
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CreateWatcher ();
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2011-05-19 16:05:58 +00:00
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CreateListener ();
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this.local_timer.Elapsed += delegate (object o, ElapsedEventArgs args) {
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CheckForChanges ();
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};
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this.remote_timer.Elapsed += delegate {
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2011-06-09 20:20:57 +00:00
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bool time_to_poll = (DateTime.Compare (this.last_poll,
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DateTime.Now.Subtract (this.poll_interval)) < 0);
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2011-06-09 22:59:56 +00:00
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if (time_to_poll) {
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2011-06-09 20:20:57 +00:00
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this.last_poll = DateTime.Now;
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2011-05-19 16:05:58 +00:00
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if (CheckForRemoteChanges ())
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SyncDownBase ();
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}
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2011-05-22 17:37:36 +00:00
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// In the unlikely case that we haven't synced up our
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// changes or the server was down, sync up again
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if (HasUnsyncedChanges)
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2011-05-19 16:05:58 +00:00
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SyncUpBase ();
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};
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this.remote_timer.Start ();
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this.local_timer.Start ();
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// Sync up everything that changed
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2011-05-20 00:55:49 +00:00
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// since we've been offline
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2011-05-19 16:05:58 +00:00
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if (AnyDifferences) {
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2011-05-20 00:55:49 +00:00
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DisableWatching ();
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2011-05-19 16:05:58 +00:00
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SyncUpBase ();
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2011-05-20 00:55:49 +00:00
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2011-05-19 16:05:58 +00:00
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while (HasUnsyncedChanges)
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SyncUpBase ();
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2011-05-20 00:55:49 +00:00
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EnableWatching ();
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}
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}
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2011-05-22 14:46:15 +00:00
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public bool ServerOnline {
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get {
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return this.server_online;
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}
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}
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public SyncStatus Status {
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get {
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return this.status;
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}
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}
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2011-05-26 01:05:30 +00:00
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public string Domain {
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get {
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2011-06-08 01:04:54 +00:00
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Regex regex = new Regex (@"(@|://)([a-z0-9\.-]+)(/|:)");
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2011-05-26 22:41:55 +00:00
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Match match = regex.Match (SparkleConfig.DefaultConfig.GetUrlForFolder (Name));
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2011-05-26 01:05:30 +00:00
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if (match.Success)
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return match.Groups [2].Value;
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else
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return null;
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}
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}
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2011-05-22 14:46:15 +00:00
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protected void OnConflictResolved ()
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{
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2011-05-22 17:49:04 +00:00
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HasUnsyncedChanges = true;
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2011-05-22 14:46:15 +00:00
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if (ConflictResolved != null)
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ConflictResolved ();
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}
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2011-05-20 00:55:49 +00:00
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public virtual bool CheckForRemoteChanges () // HasRemoteChanges { get; } ?
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{
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return true;
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}
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public virtual List<SparkleChangeSet> GetChangeSets (int count) {
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return null;
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}
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public virtual bool UsesNotificationCenter {
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get {
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return true;
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}
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}
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public string RemoteName {
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get {
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2011-05-26 22:41:55 +00:00
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string url = SparkleConfig.DefaultConfig.GetUrlForFolder (Name);
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return Path.GetFileNameWithoutExtension (url);
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2011-05-19 16:05:58 +00:00
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}
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2011-05-20 00:55:49 +00:00
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}
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public bool IsBuffering {
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get {
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return this.is_buffering;
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}
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}
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// Disposes all resourses of this object
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public void Dispose ()
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{
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this.remote_timer.Dispose ();
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this.local_timer.Dispose ();
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this.listener.Dispose ();
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}
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private void CreateWatcher ()
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{
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this.watcher = new FileSystemWatcher (LocalPath) {
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IncludeSubdirectories = true,
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EnableRaisingEvents = true,
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Filter = "*"
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};
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this.watcher.Changed += new FileSystemEventHandler (OnFileActivity);
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this.watcher.Created += new FileSystemEventHandler (OnFileActivity);
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this.watcher.Deleted += new FileSystemEventHandler (OnFileActivity);
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this.watcher.Renamed += new RenamedEventHandler (OnFileActivity);
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2011-05-19 16:05:58 +00:00
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}
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private void CreateListener ()
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{
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2011-05-30 01:19:58 +00:00
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this.listener = SparkleListenerFactory.CreateIrcListener (Domain, Identifier,
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SparkleConfig.DefaultConfig.GetAnnouncementsForFolder (Name));
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2011-05-19 16:05:58 +00:00
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// Stop polling when the connection to the irc channel is succesful
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this.listener.Connected += delegate {
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2011-06-09 20:20:57 +00:00
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this.poll_interval = new TimeSpan (0, 0, 10, 0);
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this.last_poll = DateTime.Now;
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2011-05-19 16:05:58 +00:00
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// Check for changes manually one more time
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2011-05-22 15:05:11 +00:00
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if (CheckForRemoteChanges ())
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SyncDownBase ();
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2011-05-19 16:05:58 +00:00
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// Push changes that were made since the last disconnect
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if (HasUnsyncedChanges)
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SyncUpBase ();
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};
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// Start polling when the connection to the irc channel is lost
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this.listener.Disconnected += delegate {
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2011-06-09 20:20:57 +00:00
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this.poll_interval = new TimeSpan (0, 0, 3, 0);
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2011-05-22 14:46:15 +00:00
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SparkleHelpers.DebugInfo (Name, "Falling back to polling");
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2011-05-19 16:05:58 +00:00
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};
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// Fetch changes when there is a message in the irc channel
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2011-05-28 23:52:46 +00:00
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this.listener.Announcement += delegate (SparkleAnnouncement announcement) {
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2011-05-22 17:37:36 +00:00
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string identifier = Identifier;
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if (announcement.FolderIdentifier == identifier &&
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2011-05-22 00:02:16 +00:00
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!announcement.Message.Equals (CurrentRevision)) {
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if ((Status != SyncStatus.SyncUp) &&
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(Status != SyncStatus.SyncDown) &&
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2011-05-19 16:05:58 +00:00
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!this.is_buffering) {
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2011-05-22 17:37:36 +00:00
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while (this.listener.HasQueueDownAnnouncement (identifier))
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2011-05-19 16:05:58 +00:00
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SyncDownBase ();
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}
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}
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};
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2011-06-09 16:21:55 +00:00
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2011-05-19 16:05:58 +00:00
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// Start listening
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2011-06-09 16:21:55 +00:00
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if (!this.listener.IsConnected && !this.listener.IsConnecting) {
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2011-05-22 00:02:16 +00:00
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this.listener.Connect ();
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2011-06-09 16:21:55 +00:00
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}
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2011-05-19 16:05:58 +00:00
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}
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private void CheckForChanges ()
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{
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lock (this.change_lock) {
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if (this.has_changed) {
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2011-05-28 23:52:46 +00:00
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if (this.sizebuffer.Count >= 4)
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this.sizebuffer.RemoveAt (0);
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2011-05-19 16:05:58 +00:00
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DirectoryInfo dir_info = new DirectoryInfo (LocalPath);
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this.sizebuffer.Add (CalculateFolderSize (dir_info));
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2011-05-28 23:52:46 +00:00
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if (this.sizebuffer [0].Equals (this.sizebuffer [1]) &&
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this.sizebuffer [1].Equals (this.sizebuffer [2]) &&
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this.sizebuffer [2].Equals (this.sizebuffer [3])) {
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2011-05-19 16:05:58 +00:00
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SparkleHelpers.DebugInfo ("Local", "[" + Name + "] Changes have settled.");
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this.is_buffering = false;
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this.has_changed = false;
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DisableWatching ();
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while (AnyDifferences)
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2011-05-22 14:46:15 +00:00
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SyncUpBase ();
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2011-05-19 16:05:58 +00:00
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EnableWatching ();
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}
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}
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}
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}
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// Starts a timer when something changes
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2011-05-31 20:02:08 +00:00
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public void OnFileActivity (object o, FileSystemEventArgs args)
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2011-05-19 16:05:58 +00:00
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{
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2011-05-31 20:02:08 +00:00
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if (args.FullPath.Contains ("/."))
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2011-05-19 16:05:58 +00:00
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return;
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2011-05-29 12:53:09 +00:00
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WatcherChangeTypes wct = args.ChangeType;
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2011-05-19 16:05:58 +00:00
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if (AnyDifferences) {
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this.is_buffering = true;
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// Only fire the event if the timer has been stopped.
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// This prevents multiple events from being raised whilst "buffering".
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if (!this.has_changed) {
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if (ChangesDetected != null)
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ChangesDetected ();
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}
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2011-05-29 12:53:09 +00:00
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SparkleHelpers.DebugInfo ("Event", "[" + Name + "] " + wct.ToString () + " '" + args.Name + "'");
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SparkleHelpers.DebugInfo ("Event", "[" + Name + "] Changes found, checking if settled.");
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2011-05-19 16:05:58 +00:00
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this.remote_timer.Stop ();
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lock (this.change_lock) {
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this.has_changed = true;
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}
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}
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}
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2011-05-20 00:55:49 +00:00
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private void SyncUpBase ()
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2011-05-19 16:05:58 +00:00
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{
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try {
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this.local_timer.Stop ();
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this.remote_timer.Stop ();
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SparkleHelpers.DebugInfo ("SyncUp", "[" + Name + "] Initiated");
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2011-05-20 00:55:49 +00:00
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if (SyncStatusChanged != null)
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SyncStatusChanged (SyncStatus.SyncUp);
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2011-05-19 16:05:58 +00:00
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if (SyncUp ()) {
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SparkleHelpers.DebugInfo ("SyncUp", "[" + Name + "] Done");
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HasUnsyncedChanges = false;
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if (SyncStatusChanged != null)
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SyncStatusChanged (SyncStatus.Idle);
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2011-05-22 00:02:16 +00:00
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this.listener.AnnounceBase (new SparkleAnnouncement (Identifier, CurrentRevision));
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2011-05-22 16:51:48 +00:00
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|
|
|
2011-05-19 16:05:58 +00:00
|
|
|
} else {
|
|
|
|
SparkleHelpers.DebugInfo ("SyncUp", "[" + Name + "] Error");
|
|
|
|
|
|
|
|
HasUnsyncedChanges = true;
|
|
|
|
SyncDownBase ();
|
2011-05-22 17:06:28 +00:00
|
|
|
|
2011-05-22 17:12:40 +00:00
|
|
|
if (SyncUp ()) {
|
2011-05-22 17:06:28 +00:00
|
|
|
HasUnsyncedChanges = false;
|
2011-05-22 17:12:40 +00:00
|
|
|
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.Idle);
|
|
|
|
|
|
|
|
this.listener.AnnounceBase (new SparkleAnnouncement (Identifier, CurrentRevision));
|
|
|
|
|
|
|
|
} else {
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.Error);
|
|
|
|
}
|
2011-05-19 16:05:58 +00:00
|
|
|
}
|
2011-05-22 16:51:48 +00:00
|
|
|
|
2011-05-19 16:05:58 +00:00
|
|
|
} finally {
|
|
|
|
this.remote_timer.Start ();
|
|
|
|
this.local_timer.Start ();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
private void SyncDownBase ()
|
|
|
|
{
|
|
|
|
SparkleHelpers.DebugInfo ("SyncDown", "[" + Name + "] Initiated");
|
|
|
|
this.remote_timer.Stop ();
|
|
|
|
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.SyncDown);
|
|
|
|
|
|
|
|
if (SyncDown ()) {
|
|
|
|
SparkleHelpers.DebugInfo ("SyncDown", "[" + Name + "] Done");
|
|
|
|
this.server_online = true;
|
|
|
|
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.Idle);
|
2011-05-22 14:46:15 +00:00
|
|
|
|
2011-06-03 00:33:41 +00:00
|
|
|
if (NewChangeSet != null)
|
|
|
|
NewChangeSet (GetChangeSets (1) [0], LocalPath);
|
|
|
|
|
2011-05-22 17:49:04 +00:00
|
|
|
// There could be changes from a
|
2011-06-03 00:33:41 +00:00
|
|
|
// resolved conflict. Tries only once,
|
|
|
|
//then let the timer try again periodicallly
|
2011-05-22 14:46:15 +00:00
|
|
|
if (HasUnsyncedChanges)
|
|
|
|
SyncUp ();
|
2011-05-22 17:49:04 +00:00
|
|
|
|
2011-05-19 16:05:58 +00:00
|
|
|
} else {
|
|
|
|
SparkleHelpers.DebugInfo ("SyncDown", "[" + Name + "] Error");
|
|
|
|
this.server_online = false;
|
|
|
|
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.Error);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (SyncStatusChanged != null)
|
|
|
|
SyncStatusChanged (SyncStatus.Idle);
|
|
|
|
|
|
|
|
this.remote_timer.Start ();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
public void DisableWatching ()
|
|
|
|
{
|
|
|
|
this.watcher.EnableRaisingEvents = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
public void EnableWatching ()
|
|
|
|
{
|
|
|
|
this.watcher.EnableRaisingEvents = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-05-28 23:52:46 +00:00
|
|
|
// Create an initial change set when the
|
|
|
|
// user has fetched an empty remote folder
|
|
|
|
public virtual void CreateInitialChangeSet ()
|
|
|
|
{
|
|
|
|
string file_path = Path.Combine (LocalPath, "SparkleShare.txt");
|
|
|
|
TextWriter writer = new StreamWriter (file_path);
|
|
|
|
writer.WriteLine (":)");
|
|
|
|
writer.Close ();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-05-19 16:05:58 +00:00
|
|
|
// Recursively gets a folder's size in bytes
|
|
|
|
private double CalculateFolderSize (DirectoryInfo parent)
|
|
|
|
{
|
|
|
|
if (!System.IO.Directory.Exists (parent.ToString ()))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
double size = 0;
|
|
|
|
|
|
|
|
// Ignore the temporary 'rebase-apply' directory. This prevents potential
|
|
|
|
// crashes when files are being queried whilst the files have already been deleted.
|
|
|
|
if (parent.Name.Equals ("rebase-apply"))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
foreach (FileInfo file in parent.GetFiles()) {
|
|
|
|
if (!file.Exists)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
size += file.Length;
|
|
|
|
}
|
|
|
|
|
|
|
|
foreach (DirectoryInfo directory in parent.GetDirectories())
|
|
|
|
size += CalculateFolderSize (directory);
|
|
|
|
|
|
|
|
return size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|