From b9a329c8f0403f0fa801b2c5d8f3a941a6e26e25 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Wed, 22 Apr 2020 18:29:00 +0200
Subject: [PATCH] Start streaming

---
 lib/helpers/calls_helper.dart   |  4 ++++
 lib/ui/screens/call_screen.dart | 39 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/lib/helpers/calls_helper.dart b/lib/helpers/calls_helper.dart
index 92ed4a6..d98a670 100644
--- a/lib/helpers/calls_helper.dart
+++ b/lib/helpers/calls_helper.dart
@@ -62,4 +62,8 @@ class CallsHelper {
         "type": "CANDIDATE",
         "data": jsonEncode(candidate.toMap())
       });
+
+  /// Mark ourselves as ready to stream to other peers
+  static Future<void> markPeerReady(int callID) async =>
+      await ws("calls/mark_ready", {"callID": callID});
 }
diff --git a/lib/ui/screens/call_screen.dart b/lib/ui/screens/call_screen.dart
index ed64ac3..33ff9be 100644
--- a/lib/ui/screens/call_screen.dart
+++ b/lib/ui/screens/call_screen.dart
@@ -200,6 +200,39 @@ class _CallScreenState extends SafeState<CallScreen> {
       await _renderers[userID()].initialize();
       _renderers[userID()].srcObject = _localStream;
       setState(() {});
+
+      // Open stream
+      final peerConnection = await createPeerConnection(_conf.pluginConfig, {
+        "mandatory": {},
+        "optional": [],
+      });
+
+      _peersConnections[userID()] = peerConnection;
+      await peerConnection.addStream(_localStream);
+
+      peerConnection.onAddStream =
+          (s) => throw Exception("Got a new stream on main peer connection!");
+      peerConnection.onIceCandidate =
+          (c) => CallsHelper.sendIceCandidate(convID, userID(), c);
+      peerConnection.onIceConnectionState = (c) {
+        print("New connection state: $c");
+
+        if (c == RTCIceConnectionState.RTCIceConnectionStateConnected)
+          CallsHelper.markPeerReady(convID);
+      };
+      peerConnection.onSignalingState = (c) => print("New signaling state: $c");
+
+      // Create & send offer
+      final offer = await peerConnection.createOffer({
+        "mandatory": {
+          "OfferToReceiveAudio": true,
+          "OfferToReceiveVideo": true,
+        },
+        "optional": [],
+      });
+      await peerConnection.setLocalDescription(offer);
+
+      await CallsHelper.sendSessionDescription(convID, userID(), offer);
     } catch (e, stack) {
       print("Could not start streaming! $e\n$stack");
       showSimpleSnack(context, tr("Could not start streaming!"));
@@ -208,6 +241,12 @@ class _CallScreenState extends SafeState<CallScreen> {
 
   /// Stop local streaming
   Future<void> _stopStreaming() async {
+    // Close peer connection
+    if (_peersConnections.containsKey(userID())) {
+      _peersConnections[userID()].close();
+      _peersConnections.remove(userID());
+    }
+
     // Stop local stream
     if (_localStream != null) {
       await _localStream.dispose();