beginning of mobile site

ui/mobile/ws/Connection.js

@@ -0,0 +1,62 @@
+class Connection {
+    connectionTries = 0
+    ws;
+    linkCreated;
+    wsStatus;
+
+    constructor(receiveCB) {
+        this.init()
+        this.receiveCB = receiveCB
+    }
+    
+    init() {
+        if(window.location.hostname === "localhost") {
+            this.ws = new WebSocket("ws://" + "localhost:3003")
+        } else {
+            this.ws = new WebSocket("wss://" + window.location.hostname + window.location.pathname)
+        }
+        this.ws.addEventListener('open', () => {
+            this.connectionTries = 0
+            console.log("Websocket connection established.");
+            this.ws.addEventListener('message', this.receiveCB)
+        });
+        this.ws.addEventListener("close", () => {
+            this.checkOpen();
+            console.log('Websocket Closed')
+        })
+    }
+    
+    async checkOpen() {
+        if (this.ws.readyState === WebSocket.OPEN) {
+            return true
+        } else {
+            await this.sleep(this.connectionTries < 20 ? 5000 : 60000)
+            this.connectionTries++
+            console.log('Reestablishing connection')
+            this.init()
+        }
+    }
+
+    sleep = (time) => {
+        return new Promise(resolve => {
+            setTimeout(resolve, time);
+        });
+    }
+    
+    send = (msg) => {
+        console.log("sending")
+        if (this.ws.readyState === WebSocket.OPEN) {
+            this.ws.send(msg);
+        }
+        else if(this.connectionTries === 0) {
+            setTimeout(() => {
+                this.send(msg)
+            }, 100)
+        }
+        else {
+            console.error('No websocket connection: Cannot send message');
+        }
+    }
+}
+
+export default Connection