Implement file sending via Jingle

This is still disabled by default until prioritization is implemented;
otherwise this could be preferred to HTTP uploads.

File sending only works via Jingle In-Band-Bytestreams right now, more
transports are going to be implemented.

To test this, uncomment the line with `JingleFileTransfer` in
libdino/src/application.vala.

1 files changed, 52 insertions, 0 deletions

diff --git a/libdino/src/service/jingle_file_manager.vala b/libdino/src/service/jingle_file_manager.vala
new file mode 100644
index 00000000..055f0758
--- /dev/null
+++ b/libdino/src/service/jingle_file_manager.vala
@@ -0,0 +1,52 @@
+using Gdk;
+using Gee;
+
+using Xmpp;
+using Dino.Entities;
+
+namespace Dino {
+
+public class JingleFileManager : StreamInteractionModule, FileSender, Object {
+    public static ModuleIdentity<JingleFileManager> IDENTITY = new ModuleIdentity<JingleFileManager>("jingle_files");
+    public string id { get { return IDENTITY.id; } }
+
+    private StreamInteractor stream_interactor;
+
+    public static void start(StreamInteractor stream_interactor) {
+        JingleFileManager m = new JingleFileManager(stream_interactor);
+        stream_interactor.add_module(m);
+    }
+
+    private JingleFileManager(StreamInteractor stream_interactor) {
+        this.stream_interactor = stream_interactor;
+
+        stream_interactor.get_module(FileManager.IDENTITY).add_sender(this);
+    }
+
+    public bool is_upload_available(Conversation conversation) {
+        // TODO(hrxi) Here and in `send_file`: What should happen if `stream == null`?
+        XmppStream? stream = stream_interactor.get_stream(conversation.account);
+        foreach (Jid full_jid in stream.get_flag(Presence.Flag.IDENTITY).get_resources(conversation.counterpart)) {
+            if (stream.get_module(Xep.JingleFileTransfer.Module.IDENTITY).is_available(stream, full_jid)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    public bool can_send(Conversation conversation, FileTransfer file_transfer) {
+        return file_transfer.encryption != Encryption.OMEMO;
+    }
+    public void send_file(Conversation conversation, FileTransfer file_transfer) {
+        XmppStream? stream = stream_interactor.get_stream(file_transfer.account);
+        foreach (Jid full_jid in stream.get_flag(Presence.Flag.IDENTITY).get_resources(conversation.counterpart)) {
+            // TODO(hrxi): Prioritization of transports (and resources?).
+            if (!stream.get_module(Xep.JingleFileTransfer.Module.IDENTITY).is_available(stream, full_jid)) {
+                continue;
+            }
+            stream.get_module(Xep.JingleFileTransfer.Module.IDENTITY).offer_file_stream(stream, full_jid, file_transfer.input_stream, file_transfer.file_name, file_transfer.size);
+            return;
+        }
+    }
+}
+
+}