Add file receiving via Jingle

This currently follows the same rules as HTTP file download for
accepting files.

2 files changed, 74 insertions, 3 deletions

diff --git a/libdino/src/service/file_manager.vala b/libdino/src/service/file_manager.vala
index 9873539a..049239f7 100644
--- a/libdino/src/service/file_manager.vala
+++ b/libdino/src/service/file_manager.vala
@@ -65,8 +65,8 @@ public class FileManager : StreamInteractionModule, Object {
 
         foreach (FileSender file_sender in file_senders) {
             if (file_sender.can_send(conversation, file_transfer)) {
-                // TODO(hrxi): Currently, this tries to send the file with every transfer available, but it should probably only select one.
                 file_sender.send_file(conversation, file_transfer);
+                return;
             }
         }
         received_file(file_transfer, conversation);
@@ -121,7 +121,9 @@ public class FileManager : StreamInteractionModule, Object {
     }
 
     public void add_sender(FileSender file_sender) {
-        file_senders.add(file_sender);
+        // Order file_senders in reverse order of adding them -- HTTP is added
+        // later than Jingle.
+        file_senders.insert(0, file_sender);
         file_sender.upload_available.connect((account) => {
             upload_available(account);
         });
diff --git a/libdino/src/service/jingle_file_manager.vala b/libdino/src/service/jingle_file_manager.vala
index 055f0758..bd470f0b 100644
--- a/libdino/src/service/jingle_file_manager.vala
+++ b/libdino/src/service/jingle_file_manager.vala
@@ -6,11 +6,13 @@ using Dino.Entities;
 
 namespace Dino {
 
-public class JingleFileManager : StreamInteractionModule, FileSender, Object {
+public class JingleFileManager : StreamInteractionModule, FileProvider, FileSender, Object {
     public static ModuleIdentity<JingleFileManager> IDENTITY = new ModuleIdentity<JingleFileManager>("jingle_files");
     public string id { get { return IDENTITY.id; } }
 
     private StreamInteractor stream_interactor;
+    private HashMap<string, Xmpp.Xep.JingleFileTransfer.FileTransfer> file_transfers
+        = new HashMap<string, Xmpp.Xep.JingleFileTransfer.FileTransfer>();
 
     public static void start(StreamInteractor stream_interactor) {
         JingleFileManager m = new JingleFileManager(stream_interactor);
@@ -21,6 +23,73 @@ public class JingleFileManager : StreamInteractionModule, FileSender, Object {
         this.stream_interactor = stream_interactor;
 
         stream_interactor.get_module(FileManager.IDENTITY).add_sender(this);
+        stream_interactor.get_module(FileManager.IDENTITY).add_provider(this);
+        stream_interactor.stream_negotiated.connect(on_stream_negotiated);
+    }
+
+    private void on_stream_negotiated(Account account, XmppStream stream) {
+        stream_interactor.module_manager.get_module(account, Xmpp.Xep.JingleFileTransfer.Module.IDENTITY).file_incoming.connect((stream, jingle_file_transfer) => {
+            Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(jingle_file_transfer.peer.bare_jid, account);
+            if (conversation == null) {
+                // TODO(hrxi): What to do?
+                return;
+            }
+            string id = random_uuid();
+
+            FileTransfer file_transfer = new FileTransfer();
+            file_transfer.account = account;
+            file_transfer.counterpart = jingle_file_transfer.peer.bare_jid;
+            file_transfer.ourpart = account.bare_jid;
+            file_transfer.encryption = Encryption.NONE;
+            file_transfer.time = new DateTime.now_utc();
+            file_transfer.local_time = new DateTime.now_utc();
+            file_transfer.direction = FileTransfer.DIRECTION_RECEIVED;
+            file_transfer.file_name = jingle_file_transfer.file_name;
+            file_transfer.size = (int)jingle_file_transfer.size; // TODO(hrxi): remove cast
+            file_transfer.state = FileTransfer.State.NOT_STARTED;
+            file_transfer.provider = 0; // TODO(hrxi): what is this?
+            file_transfer.info = id;
+            file_transfers[id] = jingle_file_transfer;
+
+            file_incoming(file_transfer, conversation);
+        });
+    }
+
+    async void get_meta_info(FileTransfer file_transfer) {
+        // TODO(hrxi): what is this function?
+    }
+    async void download(FileTransfer file_transfer, File file_) {
+        // TODO(hrxi) What should happen if `stream == null`?
+        XmppStream? stream = stream_interactor.get_stream(file_transfer.account);
+        Xmpp.Xep.JingleFileTransfer.FileTransfer jingle_file_transfer = file_transfers[file_transfer.info];
+        jingle_file_transfer.accept(stream);
+        file_transfer.input_stream = jingle_file_transfer.stream;
+
+        // TODO(hrxi): BEGIN: Copied from plugins/http-files/src/file_provider.vala
+        foreach (IncomingFileProcessor processor in stream_interactor.get_module(FileManager.IDENTITY).incoming_processors) {
+            if (processor.can_process(file_transfer)) {
+                processor.process(file_transfer);
+            }
+        }
+
+        // TODO(hrxi): should this be an &&?
+        File file = file_;
+        if (file_transfer.encryption == Encryption.PGP || file.get_path().has_suffix(".pgp")) {
+            file = File.new_for_path(file.get_path().substring(0, file.get_path().length - 4));
+        }
+        // TODO(hrxi): END: Copied from plugins/http-files/src/file_provider.vala
+
+        try {
+            OutputStream os = file.create(FileCreateFlags.REPLACE_DESTINATION);
+            yield os.splice_async(file_transfer.input_stream, OutputStreamSpliceFlags.CLOSE_SOURCE|OutputStreamSpliceFlags.CLOSE_TARGET);
+            file_transfer.path = file.get_basename();
+            file_transfer.input_stream = yield file.read_async();
+
+            file_transfer.state = FileTransfer.State.COMPLETE;
+        } catch (Error e) {
+            file_transfer.state = FileTransfer.State.FAILED;
+            return;
+        }
     }
 
     public bool is_upload_available(Conversation conversation) {