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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>
* Philip Withnall <philip.withnall@collabora.co.uk>
*/
using GLib;
using Folks;
using Folks.Backends.Kf;
/**
* A persona store which is associated with a single simple key file. It will
* create a {@link Persona} for each of the groups in the key file.
*/
public class Folks.Backends.Kf.PersonaStore : Folks.PersonaStore
{
private HashTable<string, Persona> _personas;
private File file;
private GLib.KeyFile key_file;
private uint first_unused_id = 0;
/**
* {@inheritDoc}
*/
public override string type_id { get; private set; }
/**
* {@inheritDoc}
*/
public override string display_name { get; private set; }
/**
* {@inheritDoc}
*/
public override string id { get; private set; }
/**
* {@inheritDoc}
*/
public override HashTable<string, Persona> personas
{
get { return this._personas; }
}
/**
* Create a new PersonaStore.
*
* Create a new persona store to expose the {@link Persona}s provided by the
* different groups in the key file given by `key_file`.
*/
public PersonaStore (File key_file)
{
this.type_id = "key-file";
this.id = key_file.get_basename ();
this.display_name = this.id; /* the user should _never_ see this */
this.trust_level = PersonaStoreTrust.FULL;
this.file = key_file;
this._personas = new HashTable<string, Persona> (str_hash, str_equal);
}
public override async void prepare ()
{
string filename = this.file.get_path ();
this.key_file = new GLib.KeyFile ();
/* Load or create the file */
while (true)
{
/* Load the file; if this fails due to the file not existing or having
* been deleted in the meantime, we can continue below and try to
* create it instead. */
try
{
string contents = null;
size_t length = 0;
yield this.file.load_contents_async (null, out contents,
out length);
if (length > 0)
{
this.key_file.load_from_data (contents, length,
KeyFileFlags.KEEP_COMMENTS);
}
break;
}
catch (Error e1)
{
if (!(e1 is IOError.NOT_FOUND))
{
warning ("The relationship key file '%s' could not be " +
"loaded: %s", filename, e1.message);
this.removed ();
return;
}
}
/* Ensure the parent directory tree exists for the new file */
File parent_dir = this.file.get_parent ();
try
{
/* Recursively create the directory */
parent_dir.make_directory_with_parents ();
}
catch (Error e3)
{
if (!(e3 is IOError.EXISTS))
{
warning ("The relationship key file directory '%s' could " +
"not be created: %s", parent_dir.get_path (), e3.message);
this.removed ();
return;
}
}
/* Create a new file; if this fails due to the file having been
* created in the meantime, we can loop back round and try and load
* it. */
try
{
/* Create the file */
FileOutputStream stream = yield this.file.create_async (
FileCreateFlags.PRIVATE, Priority.DEFAULT);
yield stream.close_async (Priority.DEFAULT);
}
catch (Error e2)
{
if (!(e2 is IOError.EXISTS))
{
warning ("The relationship key file '%s' could not be " +
"created: %s", filename, e2.message);
this.removed ();
return;
}
}
}
/* We've loaded or created a key file by now, so cycle through the groups:
* each group is a persona which we have to create and emit */
string[] groups = this.key_file.get_groups ();
foreach (string persona_id in groups)
{
if (persona_id.to_int () == this.first_unused_id)
this.first_unused_id++;
Persona persona = new Kf.Persona (this.key_file, persona_id, this);
this._personas.insert (persona.iid, persona);
}
if (this._personas.size () > 0)
{
/* FIXME: Groups.ChangeReason is not the right enum to use here */
this.personas_changed (this._personas.get_values (), null, null, null,
Groups.ChangeReason.NONE);
}
}
/**
* {@inheritDoc}
*/
public override async void remove_persona (Folks.Persona persona)
{
debug ("Removing Persona '%s' (IID '%s', group '%s')", persona.uid,
persona.iid, persona.display_id);
try
{
this.key_file.remove_group (persona.display_id);
yield this.save_key_file ();
/* Signal the removal of the Persona */
GLib.List<Folks.Persona> personas = new GLib.List<Folks.Persona> ();
personas.prepend (persona);
this.personas_changed (null, personas, null, null, 0);
}
catch (KeyFileError e)
{
/* Ignore the error, since it's only about a missing group */
}
}
/**
* {@inheritDoc}
*/
public override async Folks.Persona? add_persona_from_details (
HashTable<string, Value?> details) throws Folks.PersonaStoreError
{
unowned Value val = details.lookup ("im-addresses");
unowned HashTable<string, GenericArray<string>> im_addresses =
(HashTable<string, GenericArray<string>>) val.get_boxed ();
if (im_addresses == null || im_addresses.size () == 0)
{
throw new PersonaStoreError.INVALID_ARGUMENT (
"persona store (%s, %s) requires the following details:\n" +
" im-addresses (provided: '%p')\n",
this.type_id, this.id, im_addresses);
}
debug ("Adding Persona from details.");
/* Find the first unused ID, taking into account that the IDs in the key
* file may not be contiguous. */
string persona_id = null;
do
{
persona_id = this.first_unused_id.to_string ();
this.first_unused_id++;
}
while (this.key_file.has_group (persona_id) == true);
/* Create a new persona and set its im-addresses property to update the
* key file */
Persona persona = new Kf.Persona (this.key_file, persona_id, this);
this._personas.insert (persona.iid, persona);
persona.im_addresses = im_addresses;
/* FIXME: Groups.ChangeReason is not the right enum to use here */
GLib.List<Persona> personas = new GLib.List<Persona> ();
personas.prepend (persona);
this.personas_changed (personas, null, null, null,
Groups.ChangeReason.NONE);
return persona;
}
internal async void save_key_file ()
{
string key_file_data = this.key_file.to_data ();
debug ("Saving key file '%s'.", this.file.get_path ());
try
{
/* Note: We have to use key_file_data.size () here to get its length
* in _bytes_ rather than _characters_. bgo#628930 */
yield this.file.replace_contents_async (key_file_data,
key_file_data.size (), null, false, FileCreateFlags.PRIVATE);
}
catch (Error e)
{
warning ("Could not write updated key file '%s': %s",
this.file.get_path (), e.message);
}
}
}
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