setup client to make calls to servers api for webrtc data management

RelayClient/MainPage.xaml.cs

@@ -32,7 +32,7 @@ public partial class MainPage : ContentPage
         }
 
         _wsc = new WebSocket("ws://localhost:1337/");
-
+        
         _wsc.OnMessage += WscOnMessage;
         _wsc.Connect();
 
@@ -42,6 +42,7 @@ public partial class MainPage : ContentPage
         _wsc.Send("GET_CHANNELS");
         
         hybridWebView.SetInvokeJavaScriptTarget(this);
+        ServerAPI.setupClient();
 
     }
 
@@ -353,21 +354,58 @@ public partial class MainPage : ContentPage
         }
     }
 
-    public void JoinRtcChannel()
+    public async Task<bool> JoinRtcChannel()
     {
         //TODO: get bool value for if channel ID has an active call
         //TODO: Join RTC using current channel ID
+        hybridWebView.SendRawMessage($"Attempting to join RTC Channel {_currentChannelName}");
+        bool active = await ServerAPI.GetIsChannelActiveAsync(_currentChannelId);
+        hybridWebView.SendRawMessage($"Rtc Channel {_currentChannelName} is active: {active}");
+        return active;
+        //await hybridWebView.EvaluateJavaScriptAsync($"window.channelCallJoin({active})");
+
+    }
+    public async void WriteRtcOffer(string json)
+    {
+        try
+        {
+            RtcDescription? description = JsonSerializer.Deserialize<RtcDescription>(json);
+            DBOffer offer = new DBOffer
+            {
+                ChannelId = _currentChannelId,
+                Username = _username,
+                SessionDescription = description
+            };
+            await ServerAPI.PostOfferAsync(offer);
+        }
+        catch (Exception ex)
+        {
+            hybridWebView.SendRawMessage(ex.Message);
+        }
+
+    }
+    public async Task<string> GetRtcOffer()
+    {
+        RtcDescription? offer = await ServerAPI.GetOffersForChannelAsync(_currentChannelId);
+        return JsonSerializer.Serialize(offer);
+    }
+    public async void WriteRtcAnswer(string json)
+    {
+        RtcDescription? description = JsonSerializer.Deserialize<RtcDescription>(json);
+        DBOffer answer = new DBOffer
+        {
+            ChannelId = _currentChannelId,
+            Username = _username,
+            SessionDescription = description
+        };
+        await ServerAPI.PostAnswerAsync(answer);
     }
 
-    public void WriteRtcOffer(string json)
+    public async void AnswerCallback(RtcDescription answer)
     {
-        RTCOffer? offer = JsonSerializer.Deserialize<RTCOffer>(json);
-    }
-    private class RTCOffer
-    {
-        private string type { get; set; }
-        private string sdp { get; set; }
+        await hybridWebView.EvaluateJavaScriptAsync($"window.AnswerCallback({answer})");
     }
+    
     private void OnSendMessageButtonClicked(object sender, EventArgs e)
     {
         hybridWebView.SendRawMessage($"Hello from C#!");