Implemented sync view

consumer_api/views/sync_view.py

@@ -1,7 +1,32 @@
+import json
+from flask import request, current_app, jsonify
 from flask_classful import FlaskView
+from db import redis_client  # ez nagyon otvar
 
 
 class SyncView(FlaskView):
 
-    def get(self):
-        return "SyncView"
+    def post(self):
+        remote_uuid = request.json['uuid']
+        remote_ip = request.remote_addr
+
+        consumer_list = json.loads((redis_client.get("consumer_list") or b"{}").decode('utf-8'))
+
+        # Log something about it
+        if remote_uuid not in consumer_list.keys():
+            current_app.logger.info(f"New consumer registered (unknown UUID): {remote_uuid} at {remote_ip}")
+        else:  # known
+            if consumer_list[remote_uuid]['ip'] != remote_ip:
+                current_app.logger.info(f"Address of consumer {remote_uuid} changed to {remote_ip}")
+
+        consumer_list.update(
+            {remote_uuid: {"ip": remote_ip}}
+        )
+
+        redis_client.set("consumer_list", json.dumps(consumer_list).encode('utf-8'))
+
+        response = {
+            "uuid": current_app.config['LOCAL_UUID']
+        }
+
+        return jsonify(response)