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using Xmpp;
namespace Xmpp.Xep.StatelessFileSharing {
public const string STANZA_NAME = "file-transfer";
public interface SfsSource: Object {
public abstract string type();
public abstract string serialize();
public abstract StanzaNode to_stanza_node();
}
public class HttpSource: Object, SfsSource {
public string url;
public const string HTTP_NS_URI = "http://jabber.org/protocol/url-data";
public const string HTTP_STANZA_NAME = "url-data";
public const string HTTP_URL_ATTRIBUTE = "target";
public const string SOURCE_TYPE = "http";
public string type() {
return SOURCE_TYPE;
}
public string serialize() {
return this.to_stanza_node().to_xml();
}
public StanzaNode to_stanza_node() {
StanzaNode node = new StanzaNode.build(HTTP_STANZA_NAME, HTTP_NS_URI).add_self_xmlns();
node.put_attribute(HTTP_URL_ATTRIBUTE, this.url);
return node;
}
public static async HttpSource deserialize(string data) {
StanzaNode node = yield new StanzaReader.for_string(data).read_stanza_node();
HttpSource source = HttpSource.from_stanza_node(node);
assert(source != null);
return source;
}
public static HttpSource? from_stanza_node(StanzaNode node) {
string? url = node.get_attribute(HTTP_URL_ATTRIBUTE);
if (url == null) {
return null;
}
HttpSource source = new HttpSource();
source.url = url;
return source;
}
public static Gee.List<HttpSource> extract_sources(StanzaNode node) {
Gee.List<HttpSource> sources = new Gee.ArrayList<HttpSource>();
foreach (StanzaNode http_node in node.get_subnodes(HTTP_STANZA_NAME, HTTP_NS_URI)) {
HttpSource? source = HttpSource.from_stanza_node(http_node);
if (source != null) {
sources.add(source);
}
}
return sources;
}
}
public class SfsElement {
public Xep.FileMetadataElement.FileMetadata metadata = new Xep.FileMetadataElement.FileMetadata();
public Gee.List<SfsSource> sources = new Gee.ArrayList<SfsSource>();
public static SfsElement? from_stanza_node(StanzaNode node) {
SfsElement element = new SfsElement();
StanzaNode? metadata_node = node.get_subnode("file", Xep.FileMetadataElement.NS_URI);
if (metadata_node == null) {
return null;
}
Xep.FileMetadataElement.FileMetadata metadata = Xep.FileMetadataElement.FileMetadata.from_stanza_node(metadata_node);
if (metadata == null) {
return null;
}
element.metadata = metadata;
StanzaNode? sources_node = node.get_subnode("sources");
if (sources_node == null) {
return null;
}
Gee.List<HttpSource> sources = HttpSource.extract_sources(sources_node);
if (sources.is_empty) {
return null;
}
element.sources = sources;
return element;
}
public StanzaNode to_stanza_node() {
StanzaNode node = new StanzaNode.build(STANZA_NAME, NS_URI).add_self_xmlns();
node.put_node(this.metadata.to_stanza_node());
StanzaNode sources_node = new StanzaNode.build("sources", NS_URI);
Gee.List<StanzaNode> sources = new Gee.ArrayList<StanzaNode>();
foreach (SfsSource source in this.sources) {
sources.add(source.to_stanza_node());
}
sources_node.sub_nodes = sources;
node.put_node(sources_node);
return node;
}
}
public class SfsSourceAttachment {
public string sfs_id;
public Gee.List<SfsSource> sources = new Gee.ArrayList<SfsSource>();
public const string ATTACHMENT_NS_URI = "urn:xmpp:message-attaching:1";
public const string ATTACH_TO_STANZA_NAME = "attach-to";
public const string SOURCES_STANZA_NAME = "sources";
public const string ID_ATTRIBUTE_NAME = "id";
public static SfsSourceAttachment? from_message_stanza(MessageStanza stanza) {
StanzaNode? attach_to = stanza.stanza.get_subnode(ATTACH_TO_STANZA_NAME, ATTACHMENT_NS_URI);
StanzaNode? sources = stanza.stanza.get_subnode(SOURCES_STANZA_NAME, NS_URI);
if (attach_to == null || sources == null) {
return null;
}
string? id = attach_to.get_attribute(ID_ATTRIBUTE_NAME, ATTACHMENT_NS_URI);
if (id == null) {
return null;
}
SfsSourceAttachment attachment = new SfsSourceAttachment();
attachment.sfs_id = id;
Gee.List<HttpSource> http_sources = HttpSource.extract_sources(sources);
if (http_sources.is_empty) {
return null;
}
attachment.sources = http_sources;
return attachment;
}
public MessageStanza to_message_stanza(Jid to, string message_type) {
MessageStanza stanza = new MessageStanza() { to=to, type_=message_type };
Xep.MessageProcessingHints.set_message_hint(stanza, Xep.MessageProcessingHints.HINT_STORE);
StanzaNode attach_to = new StanzaNode.build(ATTACH_TO_STANZA_NAME, ATTACHMENT_NS_URI);
attach_to.add_attribute(new StanzaAttribute.build(ATTACHMENT_NS_URI, "id", this.sfs_id));
stanza.stanza.put_node(attach_to);
StanzaNode sources = new StanzaNode.build(SOURCES_STANZA_NAME, NS_URI);
Gee.List<StanzaNode> sources_nodes = new Gee.ArrayList<StanzaNode>();
foreach (SfsSource source in this.sources) {
sources_nodes.add(source.to_stanza_node());
}
sources.sub_nodes = sources_nodes;
stanza.stanza.put_node(sources);
return stanza;
}
}
public class MessageFlag : Xmpp.MessageFlag {
public const string ID = "stateless_file_sharing";
public static MessageFlag? get_flag(MessageStanza message) {
return (MessageFlag) message.get_flag(NS_URI, ID);
}
public override string get_ns() {
return NS_URI;
}
public override string get_id() {
return ID;
}
}
public class Module : XmppStreamModule {
public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "stateless_file_sharing");
public signal void received_sfs(Jid from, Jid to, SfsElement sfs_element, MessageStanza message);
public signal void received_sfs_attachment(Jid from, Jid to, SfsSourceAttachment attachment, MessageStanza message);
public void send_stateless_file_transfer(XmppStream stream, MessageStanza sfs_message, SfsElement sfs_element) {
StanzaNode sfs_node = sfs_element.to_stanza_node();
printerr(sfs_node.to_ansi_string(true));
sfs_message.stanza.put_node(sfs_node);
printerr("Sending message:\n");
printerr(sfs_message.stanza.to_ansi_string(true));
stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, sfs_message);
}
public void send_stateless_file_transfer_attachment(XmppStream stream, Jid to, string message_type, SfsSourceAttachment attachment) {
MessageStanza message = attachment.to_message_stanza(to, message_type);
printerr("Sending message:\n");
printerr(message.stanza.to_ansi_string(true));
stream.get_module(MessageModule.IDENTITY).send_message.begin(stream, message);
}
private void on_received_message(XmppStream stream, MessageStanza message) {
StanzaNode? sfs_node = message.stanza.get_subnode(STANZA_NAME, NS_URI);
if (sfs_node != null) {
SfsElement? sfs_element = SfsElement.from_stanza_node(sfs_node);
if (sfs_element == null) {
return;
}
message.add_flag(new MessageFlag());
received_sfs(message.from, message.to, sfs_element, message);
}
SfsSourceAttachment? attachment = SfsSourceAttachment.from_message_stanza(message);
if (attachment != null) {
received_sfs_attachment(message.from, message.to, attachment, message);
}
}
public override void attach(XmppStream stream) {
stream.get_module(MessageModule.IDENTITY).received_message.connect(on_received_message);
}
public override void detach(XmppStream stream) {
stream.get_module(MessageModule.IDENTITY).received_message.disconnect(on_received_message);
}
public override string get_ns() { return NS_URI; }
public override string get_id() { return IDENTITY.id; }
}
}
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