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/*
* Copyright (C) 2010 Collabora Ltd.
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Travis Reitter <travis.reitter@collabora.co.uk>
* Marco Barisione <marco.barisione@collabora.co.uk>
*/
using GLib;
using Gee;
using Folks;
using Folks.Backends.Sw;
using SocialWebClient;
extern const string BACKEND_NAME;
/**
* A backend which connects to libsocialweb and creates a {@link PersonaStore}
* for each service.
*/
public class Folks.Backends.Sw.Backend : Folks.Backend
{
private bool _is_prepared = false;
private bool _prepare_pending = false;
private bool _is_quiescent = false;
private Client _client;
private HashMap<string, PersonaStore> _persona_stores;
private Map<string, PersonaStore> _persona_stores_ro;
/**
* {@inheritDoc}
*/
public override string name { get { return BACKEND_NAME; } }
/**
* {@inheritDoc}
*/
public override Map<string, PersonaStore> persona_stores
{
get { return this._persona_stores_ro; }
}
/**
* {@inheritDoc}
*/
public Backend ()
{
Object ();
}
construct
{
this._persona_stores = new HashMap<string, PersonaStore> ();
this._persona_stores_ro = this._persona_stores.read_only_view;
}
/**
* Whether this Backend has been prepared.
*
* See {@link Folks.Backend.is_prepared}.
*/
public override bool is_prepared
{
get { return this._is_prepared; }
}
/**
* Whether this Backend has reached a quiescent state.
*
* See {@link Folks.Backend.is_quiescent}.
*
* @since 0.6.2
*/
public override bool is_quiescent
{
get { return this._is_quiescent; }
}
/**
* {@inheritDoc}
*/
public override async void prepare () throws GLib.Error
{
lock (this._is_prepared)
{
if (!this._is_prepared && !this._prepare_pending)
{
this._prepare_pending = true;
/* Hold a ref. on the Backend while we wait for the callback from
* this._client.get_services() to prevent the Backend being
* destroyed in the mean time. See: bgo#665039. */
this.ref ();
this._client = new Client ();
this._client.get_services((client, services) =>
{
foreach (var service_name in services)
this.add_service (service_name);
this._is_prepared = true;
this._prepare_pending = false;
this.notify_property ("is-prepared");
this._is_quiescent = true;
this.notify_property ("is-quiescent");
this.unref ();
});
}
}
}
/**
* {@inheritDoc}
*/
public override async void unprepare () throws GLib.Error
{
lock (this._is_prepared)
{
if (!this._is_prepared || this._prepare_pending)
{
return;
}
this._prepare_pending = true;
foreach (var store in this._persona_stores.values)
{
store.removed.disconnect (this.store_removed_cb);
this.persona_store_removed (store);
}
this._client = null;
this._persona_stores.clear ();
this.notify_property ("persona-stores");
this._is_quiescent = false;
this.notify_property ("is-quiescent");
this._is_prepared = false;
this._prepare_pending = false;
this.notify_property ("is-prepared");
}
}
private void add_service (string service_name)
{
if (this._persona_stores.get (service_name) != null)
return;
var store = new Swf.PersonaStore (this._client.get_service (service_name));
this._persona_stores.set (store.id, store);
store.removed.connect (this.store_removed_cb);
this.persona_store_added (store);
}
private void store_removed_cb (Folks.PersonaStore store)
{
this.persona_store_removed (store);
this._persona_stores.unset (store.id);
}
}
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