readd persistent peerId via sessionStorage

index.js

@@ -102,7 +102,8 @@ class SnapdropServer {
             type: 'display-name',
             message: {
                 displayName: peer.name.displayName,
-                deviceName: peer.name.deviceName
+                deviceName: peer.name.deviceName,
+                peerId: peer.id
             }
         });
     }
@@ -230,7 +231,7 @@ class Peer {
         this._setIP(request);
 
         // set peer id
-        this._setPeerId()
+        this._setPeerId(request)
 
         // is WebRTC supported ?
         this.rtcSupported = request.url.indexOf('webrtc') > -1;
@@ -297,8 +298,13 @@ class Peer {
         return false;
     }
 
-    _setPeerId() {
-        this.id = Peer.uuid();
+    _setPeerId(request) {
+        let peer_id = new URL(request.url, "http://server").searchParams.get("peer_id");
+        if (peer_id && /^([0-9]|[a-f]){8}-(([0-9]|[a-f]){4}-){3}([0-9]|[a-f]){12}$/.test(peer_id)) {
+            this.id = peer_id;
+        } else {
+            this.id = Peer.uuid();
+        }
     }
 
     toString() {

public/scripts/network.js

@@ -43,6 +43,7 @@ class ServerConnection {
                 this.send({ type: 'pong' });
                 break;
             case 'display-name':
+                sessionStorage.setItem("peer_id", msg.message.peerId);
                 Events.fire('display-name', msg);
                 break;
             default:
@@ -59,7 +60,11 @@ class ServerConnection {
         // hack to detect if deployment or development environment
         const protocol = location.protocol.startsWith('https') ? 'wss' : 'ws';
         const webrtc = window.isRtcSupported ? '/webrtc' : '/fallback';
-        return protocol + '://' + location.host + location.pathname + 'server' + webrtc;
+        let url = new URL(protocol + '://' + location.host + location.pathname + 'server' + webrtc);
+        if (sessionStorage.getItem('peer_id')) {
+            url.searchParams.append('peer_id', sessionStorage.getItem('peer_id'))
+        }
+        return url.toString();
     }
 
     _disconnect() {