WIP Note Directory Watcher Patch (was Watch for Changes Patch)

This is an updated version of the Note Directory Watcher Patch.  This
version is now useful.

It can detect changes to notes in ~/.tomboy.  It CANNOT detect new
notes or notes that have been deleted.  I will finish that tonight or
next week.

[watch.patch]

---

diff --git a/Tomboy/Addins/Makefile.am b/Tomboy/Addins/Makefile.am
index 57f5f56..9520b67 100644
--- a/Tomboy/Addins/Makefile.am
+++ b/Tomboy/Addins/Makefile.am
@@ -13,5 +13,6 @@ SUBDIRS = \
  SshSyncService \
  StickyNoteImport \
  Tasque \
+ NoteDirectoryWatcher \
  WebDavSyncService
 
diff --git a/Tomboy/Addins/NoteDirectoryWatcher/Makefile.am b/Tomboy/Addins/NoteDirectoryWatcher/Makefile.am
new file mode 100644
index 0000000..8250fd2
--- /dev/null
+++ b/Tomboy/Addins/NoteDirectoryWatcher/Makefile.am
@@ -0,0 +1,39 @@
+include $(top_srcdir)/Makefile.include
+
+CSFLAGS = \
+ -debug \
+ -define:DEBUG \
+ -target:library
+
+ASSEMBLIES = \
+ $(LINK_TOMBOY_EXE) \
+ $(GTKSHARP_LIBS) \
+ $(LINK_MONO_ADDINS) \
+ -r:Mono.Posix
+
+ADDIN_NAME = NoteDirectoryWatcher
+TARGET = $(ADDIN_NAME).dll
+CSFILES = \
+ $(srcdir)/NoteDirectoryWatcherApplicationAddin.cs
+RESOURCES = \
+ -resource:$(srcdir)/$(ADDIN_NAME).addin.xml
+
+$(TARGET).mdb: $(TARGET)
+
+$(TARGET): $(CSFILES) $(top_builddir)/Tomboy/Tomboy.exe
+ $(CSC) -out:$@ $(CSFLAGS) $(ASSEMBLIES) $(CSFILES) $(RESOURCES)
+
+
+addinsdir = $(pkglibdir)/addins
+addins_DATA = \
+ $(TARGET) \
+ $(TARGET).mdb
+
+EXTRA_DIST =             \
+ $(CSFILES) \
+ $(srcdir)/$(ADDIN_NAME).addin.xml
+
+CLEANFILES = \
+ $(TARGET).mdb \
+ $(TARGET)
+
diff --git a/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcher.addin.xml b/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcher.addin.xml
new file mode 100644
index 0000000..6bfd500
--- /dev/null
+++ b/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcher.addin.xml
@@ -0,0 +1,22 @@
+<Addin id="NoteDirectoryWatcher"
+ namespace="Tomboy"
+ name="Note Directory Watcher"
+ author="Tomboy Project"
+ description="Watch your Tomboy note directory for changes to your notes."
+ category="Tools"
+ defaultEnabled="false"
+ version="0.1">
+
+ <Runtime>
+ <Import assembly="NoteDirectoryWatcher.dll" />
+ </Runtime>
+
+ <Dependencies>
+ <Addin id="Tomboy" version="0.10" />
+ </Dependencies>
+
+ <Extension path="/Tomboy/ApplicationAddins">
+ <ApplicationAddin type="Tomboy.NoteDirectoryWatcher.NoteDirectoryWatcherApplicationAddin" />
+ </Extension>
+
+</Addin>
diff --git a/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcherApplicationAddin.cs b/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcherApplicationAddin.cs
new file mode 100644
index 0000000..c63cf93
--- /dev/null
+++ b/Tomboy/Addins/NoteDirectoryWatcher/NoteDirectoryWatcherApplicationAddin.cs
@@ -0,0 +1,160 @@
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+using Tomboy;
+
+namespace Tomboy.NoteDirectoryWatcher
+{
+ class NoteFileChangeRecord {
+ public DateTime last_change;
+ public bool deleted;
+ public bool changed;
+ }
+
+ public class NoteDirectoryWatcherApplicationAddin : ApplicationAddin
+ {
+ private FileSystemWatcher file_system_watcher;
+ private bool initialized;
+
+ private Dictionary<string, NoteFileChangeRecord> file_change_records;
+
+ public override void Initialize ()
+ {
+ string note_path = Tomboy.DefaultNoteManager.NoteDirectoryPath;
+
+ file_change_records = new Dictionary<string, NoteFileChangeRecord>();
+
+ file_system_watcher = new FileSystemWatcher (note_path);
+
+ file_system_watcher.Changed += HandleFileSystemChangeEvent;
+ file_system_watcher.Deleted += HandleFileSystemChangeEvent;
+ file_system_watcher.Created += HandleFileSystemChangeEvent;
+ file_system_watcher.Renamed += HandleFileSystemChangeEvent;
+
+ file_system_watcher.Error += HandleFileSystemErrorEvent;
+
+ // Setting to true will starts the FileSystemWatcher.
+ file_system_watcher.EnableRaisingEvents = true;
+
+ initialized = true;
+ }
+
+ public override void Shutdown ()
+ {
+ file_system_watcher.EnableRaisingEvents = false;
+
+ initialized = false;
+ }
+
+ public override bool Initialized
+ {
+ get {
+ return initialized;
+ }
+ }
+
+ private void HandleFileSystemErrorEvent (Object sender, ErrorEventArgs arg) {
+ // TODO Rescan the local notes in case some of them have changed.
+ Console.WriteLine("Handling error event: " + arg);
+ }
+
+ private void HandleFileSystemChangeEvent (Object sender, FileSystemEventArgs arg) {
+ // Record that the file has been added/changed/deleted.  adds/changes trump
+ // deletes.  Record the date.
+ lock (file_change_records)
+ {
+ string note_id = GetId(arg.FullPath);
+
+ NoteFileChangeRecord record = null;
+
+ if (file_change_records.ContainsKey(note_id)) {
+ record = file_change_records[note_id];
+ } else {
+ record = new NoteFileChangeRecord();
+ file_change_records[note_id] = record;
+ }
+
+ if (arg.ChangeType == WatcherChangeTypes.Changed) {
+ record.changed = true;
+ } else if (arg.ChangeType == WatcherChangeTypes.Created) {
+ record.changed = true;
+ } else if (arg.ChangeType == WatcherChangeTypes.Deleted) {
+ if (!record.changed) {
+ record.deleted = true;
+ }
+ } else {
+ throw new Exception("Unexpected WatcherChangeType " + arg.ChangeType);
+ }
+
+ record.last_change = DateTime.Now;
+ }
+
+ GLib.Timeout.Add(5000, new GLib.TimeoutHandler(HandleTimeout));
+ }
+
+ private bool HandleTimeout() {
+ lock (file_change_records) {
+ List<string> keysToRemove = new List<string>(file_change_records.Count);
+
+ foreach (KeyValuePair<string, NoteFileChangeRecord> pair in file_change_records) {
+ if (pair.Key != "") { // TODO
+ if (DateTime.Now > pair.Value.last_change.Add (new TimeSpan(4000)) ) {
+ Console.WriteLine(pair);
+ if (pair.Value.deleted) {
+ DeleteNote(pair.Key);
+ } else {
+ AddOrUpdateNote(pair.Key);
+ }
+
+ keysToRemove.Add(pair.Key);
+ }
+ }
+ }
+
+ foreach (string note_id in keysToRemove) {
+ file_change_records.Remove(note_id);
+ }
+ }
+
+ return false;
+ }
+
+ private static void DeleteNote(string note_id) {
+ // TODO Delete the note.
+ }
+
+ private static void AddOrUpdateNote(string note_id) {
+ bool found = false;
+
+ foreach (Note note in Tomboy.DefaultNoteManager.Notes) {
+ if (note.Id == note_id) {
+ found = true;
+
+ string note_path = Tomboy.DefaultNoteManager.NoteDirectoryPath +
+ Path.DirectorySeparatorChar + note_id + ".note";
+ string note_url = "note://tomboy/" + note_id;
+
+ NoteData data = NoteArchiver.Instance.ReadFile(note_path, note_url);
+
+ if (data.Text != note.XmlContent) {
+ note.XmlContent = data.Text;
+ note.Title = data.Title;
+ }
+ }
+ }
+
+ if (!found) {
+ // TODO Add the note.
+ }
+ }
+
+ private static string GetId(string path) {
+ int lastSlash = path.LastIndexOf(Path.DirectorySeparatorChar);
+ int firstPeriod = path.IndexOf('.', lastSlash);
+
+ return path.Substring(lastSlash + 1, firstPeriod - lastSlash - 1);
+ }
+ }
+}
diff --git a/configure.in b/configure.in
index ab9b951..8563e58 100644
--- a/configure.in
+++ b/configure.in
@@ -333,6 +333,7 @@ Tomboy/Addins/SshSyncService/Makefile
 Tomboy/Addins/StickyNoteImport/Makefile
 Tomboy/Addins/Tasque/Makefile
 Tomboy/Addins/WebDavSyncService/Makefile
+Tomboy/Addins/NoteDirectoryWatcher/Makefile
 test/Makefile
 po/Makefile.in
 ])

---

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