70 lines
3.3 KiB
Vala
70 lines
3.3 KiB
Vala
using Xmpp.Core;
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namespace Xmpp.Xep.UserAvatars {
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private const string NS_URI = "urn:xmpp:avatar";
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private const string NS_URI_DATA = NS_URI + ":data";
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private const string NS_URI_METADATA = NS_URI + ":metadata";
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public class Module : XmppStreamModule {
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public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0084_user_avatars");
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public signal void received_avatar(XmppStream stream, string jid, string id);
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private PixbufStorage storage;
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public Module(PixbufStorage storage) {
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this.storage = storage;
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}
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public void publish_png(XmppStream stream, uint8[] image, int width, int height) {
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string sha1 = Checksum.compute_for_data(ChecksumType.SHA1, image);
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StanzaNode data_node = new StanzaNode.build("data", NS_URI_DATA).add_self_xmlns()
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.put_node(new StanzaNode.text(Base64.encode(image)));
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stream.get_module(Pubsub.Module.IDENTITY).publish(stream, null, NS_URI_DATA, NS_URI_DATA, sha1, data_node);
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StanzaNode metadata_node = new StanzaNode.build("metadata", NS_URI_METADATA).add_self_xmlns();
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StanzaNode info_node = new StanzaNode.build("info", NS_URI_METADATA)
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.put_attribute("bytes", image.length.to_string())
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.put_attribute("id", sha1)
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.put_attribute("width", width.to_string())
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.put_attribute("height", height.to_string())
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.put_attribute("type", "image/png");
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metadata_node.put_node(info_node);
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stream.get_module(Pubsub.Module.IDENTITY).publish(stream, null, NS_URI_METADATA, NS_URI_METADATA, sha1, metadata_node);
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}
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public override void attach(XmppStream stream) {
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Pubsub.Module.require(stream);
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stream.get_module(Pubsub.Module.IDENTITY).add_filtered_notification(stream, NS_URI_METADATA, on_event_result, storage);
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}
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public override void detach(XmppStream stream) { }
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public static void on_event_result(XmppStream stream, string jid, string id, StanzaNode node, Object? obj) {
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PixbufStorage? storage = obj as PixbufStorage;
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StanzaNode? info_node = node.get_subnode("info", NS_URI_METADATA);
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if (info_node == null || info_node.get_attribute("type") != "image/png") return;
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if (storage.has_image(id)) {
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stream.get_module(Module.IDENTITY).received_avatar(stream, jid, id);
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} else {
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stream.get_module(Pubsub.Module.IDENTITY).request(stream, jid, NS_URI_DATA, on_pubsub_data_response, storage);
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}
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}
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public static void require(XmppStream stream) {
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if (stream.get_module(IDENTITY) == null) stderr.printf("UserAvatarsModule required but not attached!\n");
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}
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public override string get_ns() { return NS_URI; }
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public override string get_id() { return IDENTITY.id; }
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private static void on_pubsub_data_response(XmppStream stream, string jid, string? id, StanzaNode? node, Object? o) {
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if (node == null) return;
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PixbufStorage storage = o as PixbufStorage;
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storage.store(id, Base64.decode(node.get_string_content()));
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stream.get_module(Module.IDENTITY).received_avatar(stream, jid, id);
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}
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}
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}
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