preparing webrtc signaling layer

doc/api.oa3

@@ -3649,6 +3649,11 @@ paths:
           description: account disabled
         '500':
           description: internal server error
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
 
   /talk/calls/{callId}:
     put:

net/server/internal/api_addCall.go

@@ -1,9 +1,70 @@
 package databag
 
 import (
+  "databag/internal/store"
+  "github.com/google/uuid"
+  "encoding/hex"
+  "github.com/theckman/go-securerandom"
+  "gorm.io/gorm"
   "net/http"
+  "errors"
 )
 
 //AddCall adds an active call with ice signal and relay
 func AddCall(w http.ResponseWriter, r *http.Request) {
+
+  account, code, err := ParamAgentToken(r, false)
+  if err != nil {
+    ErrResponse(w, code, err)
+    return
+  }
+
+  var cardId string
+  if err := ParseRequest(r, w, &cardId); err != nil {
+    ErrResponse(w, http.StatusBadRequest, err)
+    return
+  }
+
+  // verify card is present
+  var cardSlot store.CardSlot
+  if err := store.DB.Preload("Card.CardSlot").Where("account_id = ? AND card_slot_id = ?", account.ID, cardId).First(&cardSlot).Error; err != nil {
+    if !errors.Is(err, gorm.ErrRecordNotFound) {
+      ErrResponse(w, http.StatusInternalServerError, err)
+    } else {
+      ErrResponse(w, http.StatusNotFound, err)
+    }
+    return
+  }
+  if cardSlot.Card == nil {
+    ErrResponse(w, http.StatusNotFound, errors.New("card has been deleted"))
+    return
+  }
+
+  // generate call params
+  callerBin, callerErr := securerandom.Bytes(APPTokenSize)
+  if callerErr != nil {
+    ErrResponse(w, http.StatusInternalServerError, callerErr)
+    return
+  }
+  calleeBin, calleeErr := securerandom.Bytes(APPTokenSize)
+  if calleeErr != nil {
+    ErrResponse(w, http.StatusInternalServerError, calleeErr)
+    return
+  }
+  callId := uuid.New().String()
+
+  // allocate bridge
+  callerToken := hex.EncodeToString(callerBin);
+  calleeToken := hex.EncodeToString(calleeBin);
+  bridgeRelay.AddBridge(callId, callerToken, calleeToken);
+
+  // create response
+  call := Call{
+    Id: callId,
+    CardId: cardId,
+    CallerToken: callerToken,
+    CalleeToken: calleeToken,
+    KeepAlive: BridgeKeepAlive,
+  }
+  WriteResponse(w, call);
 }

net/server/internal/api_signal.go

@@ -7,7 +7,6 @@ import (
   "errors"
 )
 
-var bridgeRelay BridgeRelay;
 var relayUpgrader = websocket.Upgrader{}
 
 //Status handler for websocket connection

net/server/internal/bridge.go

@@ -7,14 +7,15 @@ import (
   "time"
 )
 
-const bridgeKeepAlive = 6
+var bridgeRelay BridgeRelay;
+const BridgeKeepAlive = 6
 
 type BridgeStatus struct {
   status string
 }
 
 type Bridge struct {
-  bridgeId string
+  callId string
   expires int64
   callerToken string
   calleeToken string
@@ -27,12 +28,12 @@ type BridgeRelay struct {
   bridges []Bridge
 }
 
-func (s BridgeRelay) AddBridge(bridgeId string, callerToken string, calleeToken string) {
+func (s *BridgeRelay) AddBridge(callId string, callerToken string, calleeToken string) {
   s.sync.Lock()
   defer s.sync.Unlock()
   bridge := Bridge{
-    bridgeId: bridgeId,
+    callId: callId,
-    expires: time.Now().Unix() + (bridgeKeepAlive * 3),
+    expires: time.Now().Unix() + (BridgeKeepAlive * 3),
     callerToken: callerToken,
     calleeToken: calleeToken,
   }
@@ -53,7 +54,7 @@ func setStatus(bridge Bridge, status string) {
   }
 }
 
-func (s BridgeRelay) KeepAlive(bridgeId string) {
+func (s *BridgeRelay) KeepAlive(callId string) {
   s.sync.Lock()
   defer s.sync.Unlock()
   now := time.Now().Unix()
@@ -61,8 +62,8 @@ func (s BridgeRelay) KeepAlive(bridgeId string) {
   for _, bridge := range s.bridges {
     if bridge.expires > now {
       bridges = append(bridges, bridge)
-      if bridge.bridgeId == bridgeId {
+      if bridge.callId == callId {
-        bridge.expires = now + (bridgeKeepAlive * 3)
+        bridge.expires = now + (BridgeKeepAlive * 3)
         if bridge.caller != nil {
           if err := bridge.caller.WriteMessage(websocket.PingMessage, nil); err != nil {
             LogMsg("failed to ping caller signal");
@@ -81,12 +82,12 @@ func (s BridgeRelay) KeepAlive(bridgeId string) {
   s.bridges = bridges
 }
 
-func (s BridgeRelay) RemoveBridge(bridgeId string) {
+func (s *BridgeRelay) RemoveBridge(callId string) {
   s.sync.Lock()
   defer s.sync.Unlock()
   var bridges []Bridge
   for _, bridge := range s.bridges {
-    if bridge.bridgeId == bridgeId {
+    if bridge.callId == callId {
       setStatus(bridge, "closed");
     } else {
       bridges = append(bridges, bridge)
@@ -95,7 +96,7 @@ func (s BridgeRelay) RemoveBridge(bridgeId string) {
   s.bridges = bridges
 }
 
-func (s BridgeRelay) SetConnection(conn *websocket.Conn, token string) {
+func (s *BridgeRelay) SetConnection(conn *websocket.Conn, token string) {
   s.sync.Lock()
   defer s.sync.Unlock()
   for _, bridge := range s.bridges {
@@ -118,7 +119,7 @@ func (s BridgeRelay) SetConnection(conn *websocket.Conn, token string) {
 	}
 }
 
-func (s BridgeRelay) ClearConnection(conn *websocket.Conn) {
+func (s *BridgeRelay) ClearConnection(conn *websocket.Conn) {
   s.sync.Lock()
   defer s.sync.Unlock()
   for _, bridge := range s.bridges {
@@ -133,7 +134,7 @@ func (s BridgeRelay) ClearConnection(conn *websocket.Conn) {
 	}
 }
 
-func (s BridgeRelay) RelayMessage(conn *websocket.Conn, msg []byte) {
+func (s *BridgeRelay) RelayMessage(conn *websocket.Conn, msg []byte) {
   s.sync.Lock()
   defer s.sync.Unlock()
   for _, bridge := range s.bridges {
@@ -149,3 +150,4 @@ func (s BridgeRelay) RelayMessage(conn *websocket.Conn, msg []byte) {
     }
   }
 }
+