mirror of
https://gitlab.gnome.org/GNOME/gitg
synced 2024-08-27 11:59:17 +00:00
132 lines
3 KiB
Vala
132 lines
3 KiB
Vala
/*
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* This file is part of gitg
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*
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* Copyright (C) 2013 - Jesse van den Kieboom
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*
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* gitg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* gitg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gitg. If not, see <http://www.gnu.org/licenses/>.
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*/
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public class Gitg.AvatarCache : Object
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{
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private Gee.HashMap<string, Gdk.Pixbuf?> d_cache;
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private static AvatarCache? s_instance;
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construct
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{
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d_cache = new Gee.HashMap<string, Gdk.Pixbuf>();
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}
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private AvatarCache()
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{
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Object();
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}
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public static AvatarCache @default()
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{
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if (s_instance == null)
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{
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s_instance = new AvatarCache();
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}
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return s_instance;
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}
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public async Gdk.Pixbuf? load(string email, Cancellable? cancellable = null)
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{
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var id = Checksum.compute_for_string(ChecksumType.MD5, email.down());
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if (d_cache.has_key(id))
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{
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return d_cache[id];
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}
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var gravatar = @"http://www.gravatar.com/avatar/$(id)?d=404&s=50";
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var gfile = File.new_for_uri(gravatar);
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var pixbuf = yield read_avatar_from_file(id, gfile, cancellable);
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if (pixbuf == null && (cancellable == null || !cancellable.is_cancelled()))
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{
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gravatar = @"http://robohash.org/$(id).png?size=50x50";
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gfile = File.new_for_uri(gravatar);
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pixbuf = yield read_avatar_from_file(id, gfile, cancellable);
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}
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d_cache[id] = pixbuf;
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return pixbuf;
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}
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private async Gdk.Pixbuf? read_avatar_from_file(string id,
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File file,
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Cancellable? cancellable)
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{
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InputStream stream;
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try
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{
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stream = yield file.read_async(Priority.LOW, cancellable);
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}
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catch
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{
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return null;
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}
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uint8[] buffer = new uint8[4096];
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var loader = new Gdk.PixbufLoader();
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loader.set_size(50, 50);
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return yield read_avatar(id, stream, buffer, loader, cancellable);
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}
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private async Gdk.Pixbuf? read_avatar(string id,
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InputStream stream,
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uint8[] buffer,
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Gdk.PixbufLoader loader,
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Cancellable? cancellable)
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{
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ssize_t n;
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try
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{
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n = yield stream.read_async(buffer, Priority.LOW, cancellable);
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}
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catch { return null; }
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if (n != 0)
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{
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try
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{
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loader.write(buffer[0:n]);
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}
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catch { return null; }
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return yield read_avatar(id, stream, buffer, loader, cancellable);
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}
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else
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{
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// Finished reading
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try
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{
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loader.close();
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} catch { return null; }
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return loader.get_pixbuf();
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}
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}
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}
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// ex: ts=4 noet
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