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/*
* This file is part of gitg
*
* Copyright (C) 2013 - Jesse van den Kieboom
*
* gitg 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 2 of the License, or
* (at your option) any later version.
*
* gitg 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 gitg. If not, see <http://www.gnu.org/licenses/>.
*/
public class Gitg.AvatarCache : Object
{
private Gee.HashMap<string, Gdk.Pixbuf?> d_cache;
private static AvatarCache? s_instance;
construct
{
d_cache = new Gee.HashMap<string, Gdk.Pixbuf>();
}
private AvatarCache()
{
Object();
}
public static AvatarCache @default()
{
if (s_instance == null)
{
s_instance = new AvatarCache();
}
return s_instance;
}
public async Gdk.Pixbuf? load(string email, int size = 50, Cancellable? cancellable = null)
{
var id = Checksum.compute_for_string(ChecksumType.MD5, email.down());
var ckey = @"$id $size";
if (d_cache.has_key(ckey))
{
return d_cache[ckey];
}
var gravatar = @"https://www.gravatar.com/avatar/$(id)?d=404&s=$(size)";
var gfile = File.new_for_uri(gravatar);
var pixbuf = yield read_avatar_from_file(id, gfile, size, cancellable);
d_cache[ckey] = pixbuf;
return pixbuf;
}
private async Gdk.Pixbuf? read_avatar_from_file(string id,
File file,
int size,
Cancellable? cancellable)
{
InputStream stream;
try
{
stream = yield Gitg.PlatformSupport.http_get(file, cancellable);
}
catch(Error e)
{
debug("Can not retrieve avatar from %s: %s", file.get_path(), e.message);
return null;
}
uint8[] buffer = new uint8[4096];
var loader = new Gdk.PixbufLoader();
loader.set_size(size, size);
return yield read_avatar(id, stream, buffer, loader, cancellable);
}
private async Gdk.Pixbuf? read_avatar(string id,
InputStream stream,
uint8[] buffer,
Gdk.PixbufLoader loader,
Cancellable? cancellable)
{
ssize_t n;
try
{
n = yield stream.read_async(buffer, Priority.LOW, cancellable);
}
catch { return null; }
if (n != 0)
{
try
{
loader.write(buffer[0:n]);
}
catch { return null; }
return yield read_avatar(id, stream, buffer, loader, cancellable);
}
else
{
// Finished reading
try
{
loader.close();
} catch { return null; }
return loader.get_pixbuf();
}
}
}
// ex: ts=4 noet
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