attempting to subscribe to client desktop file path notifications

1 files changed, 152 insertions, 0 deletions

diff --git a/src/familiar-players-db.vala b/src/familiar-players-db.vala
new file mode 100644
index 0000000..5ed209b
--- /dev/null
+++ b/src/familiar-players-db.vala
@@ -0,0 +1,152 @@
+/*
+Copyright 2010 Canonical Ltd.
+
+Authors:
+    Conor Curran <conor.curran@canonical.com>
+
+This program is free software: you can redistribute it and/or modify it
+under the terms of the GNU General Public License version 3, as published
+by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranties of
+MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+using Gee;
+using GLib.Path;
+using GLib.DirUtils;
+using GLib.FileUtils;
+using GLib.Timeout;
+using GLib.Environment;
+
+// TODO: more refactoring needed here
+public class FamiliarPlayersDB : GLib.Object
+{
+	private const string GROUP_NAME = "Seen Database";
+	private const string KEY_NAME = "DesktopFiles";	
+	private HashMap<string, bool> players_DB;
+	private string file_name;
+	private string dir_name;
+	private KeyFile key_file;
+	private uint write_id;
+	
+	public FamiliarPlayersDB()
+	{
+		this.write_id = 0;
+		this.players_DB = new HashMap<string, bool>();		
+		this.dir_name = build_filename(get_user_cache_dir(), "indicators", "sound");
+		this.file_name = build_filename(this.dir_name, "familiar-players-db.keyfile");
+		if(create_key_file() && check_for_keys() && load_data_from_key_file()){
+			debug("keyfiles in place and ready for action");			
+		}
+		else{
+			this.key_file = null;
+			warning("FamiliarPlayersDB:: problems loading key file - can't go any further");
+		}		
+	}
+
+	private bool create_key_file(){
+		if (test(this.file_name, GLib.FileTest.EXISTS)) {
+			this.key_file = new KeyFile();
+			try{
+				if (this.key_file.load_from_file(this.file_name, KeyFileFlags.NONE) == true) {
+					return true;
+				}
+			}
+			catch(FileError e){
+				warning("FamiliarPlayersDB - error trying to load KeyFile");
+			}
+		}
+		return false;
+	}
+
+	private bool check_for_keys(){
+		try{
+			if(this.key_file.has_key(GROUP_NAME, KEY_NAME) == true){
+				return true;
+			}
+		}
+		catch(KeyFileError e){
+				return false;			
+		}
+		warning("Seen DB '%s' does not have key '%s' in group '%s'", this.file_name, KEY_NAME, GROUP_NAME);
+		return false;		
+	}
+		
+	private bool load_data_from_key_file()
+	{
+		try{
+			string[] desktops = this.key_file.get_string_list(GROUP_NAME,
+				                                          			KEY_NAME);
+				                                          			
+			int i = 0;
+			while (desktops[i] != null) {
+				this.players_DB.set(desktops[i], true);  
+			}
+			return true;
+		}
+		catch(FileError error){
+			warning("Error loading the Desktop string list");				
+			return false;
+		}
+	}
+
+	private bool write_db()
+	{
+		KeyFile  keyfile = new KeyFile();
+		string[] desktops = {};
+		//Set<string> keys = this.players_DB.keys;
+		foreach(string key in this.players_DB.keys){
+			desktops += key;
+		}
+		keyfile.set_string_list(GROUP_NAME,
+	                          KEY_NAME,
+		                        desktops);
+		size_t data_length;
+		string data = null;
+		try{
+			data  = keyfile.to_data(out data_length);
+		}
+		catch(Error e){
+			warning("Problems dumping keyfile to a string");
+			return false;
+		}
+		
+		if(create_with_parents(this.dir_name, 0700) != 0){
+			warning("Unable to make directory: %s", this.dir_name);
+			return false;
+		}
+
+		try{
+			if(set_contents(this.file_name, data, (ssize_t)data_length) == false){
+				warning("Unable to write out file '%s'", this.file_name);			
+			}
+		}
+		catch(FileError err){
+			warning("Unable to write out file '%s'", this.file_name);			
+		}
+		return true;
+	}
+
+	public void db_add(string desktop)
+	{
+		if(already_familiar(desktop) == false){
+			if(this.write_id != 0){
+				Source.remove(this.write_id);
+				this.write_id = 0;
+			}
+			this.write_id = Timeout.add_seconds(60, write_db);
+			this.players_DB.set(desktop.dup(), true);
+		}
+	}
+	
+	public bool already_familiar(string desktop)
+	{
+		return this.players_DB.get(desktop);
+	}
+}
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