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/*
DownloadService.vala
Copyright (C) 2010 Maia Kozheva <sikon@ubuntu.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY 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;
namespace Steadyflow.Core {
public class DownloadService : GLib.Object, IDownloadService {
private Gee.List<IDownloadFile> _files;
private int last_uid;
public Gee.List<IDownloadFile> files {
owned get { return _files.read_only_view; }
}
public DownloadService () {
_files = new ArrayList<IDownloadFile> ();
last_uid = 0;
load_state ();
}
~DownloadService () {
save_state ();
}
public IDownloadFile? get_file_by_uid (int uid) {
foreach (IDownloadFile file in files) {
if (file.uid == uid)
return file;
}
return null;
}
public IDownloadFile add_file (string url, string local_name, IDownloadFile.FinishAction finish_action,
string? finish_command) throws Error {
IDownloadFile file = new GioDownloadFile (url, local_name, last_uid, finish_action, finish_command);
last_uid++;
file.start (false);
_files.add (file);
file_added (file);
file.status_changed.connect ((status) => { save_state (); });
return file;
}
public void remove_file (IDownloadFile file) {
_files.remove (file);
save_state ();
file_removed (file);
}
private File get_state_file () {
string config_dir = Environment.get_user_data_dir ();
File subdir = File.new_for_path (config_dir).get_child ("steadyflow");
try {
if (!subdir.query_exists (null)) {
subdir.make_directory_with_parents (null);
} else if (subdir.query_file_type (FileQueryInfoFlags.NONE, null) != FileType.DIRECTORY) {
throw new FileError.NOTDIR (_(
"Cannot create settings directory - a non-directory with that name already exists"));
}
} catch (Error e) {
Util.fatal_error (e);
}
return subdir.get_child ("downloads.ini");
}
private void load_state () {
KeyFile keys = new KeyFile ();
int max_uid = 0;
try {
keys.load_from_file (get_state_file ().get_path (), KeyFileFlags.NONE);
foreach (string group in keys.get_groups ()) {
if (group == "ROOT")
continue;
bool should_start = false;
int uid = int.parse(group);
IDownloadFile file = GioDownloadFile.deserialize (keys, uid, out should_start);
if (uid > max_uid)
max_uid = uid;
_files.add (file);
file.status_changed.connect ((status) => { save_state (); });
if (should_start)
file.start ();
}
last_uid = max_uid + 1;
} catch (Error e) {
// cannot load state, alas
}
}
private void save_state () {
KeyFile keys = new KeyFile ();
foreach (IDownloadFile file in files) {
file.serialize (keys);
}
string file_contents = keys.to_data ();
try {
get_state_file ().replace_contents (file_contents.data, null, false, FileCreateFlags.NONE, null);
} catch (Error e) {
stderr.printf ("Cannot save downloads state");
}
}
}
}
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