Dockerized and fixed errors

app/broadcast/__init__.py

@@ -0,0 +1 @@
+# Placeholder

app/broadcast/b_in.py

@@ -0,0 +1,71 @@
+import requests
+
+import logging
+logger = logging.getLogger(__name__)
+
+class FetchUpdates:
+    """Fetches updates from the main server and relays them to the clock"""
+
+    def __init__(self, server_ip, port):
+        """Both methods return a list as python-object. This should be then converted to a numpy array."""
+        # self.server_ip = server_ip
+        self.base_url = server_ip + ":" + port
+        # self.modules gets added through the caller
+        self.update_calls = 0
+        self.last_fetch = {}
+
+
+    def start(self):
+        # dummy for errorless launching
+        pass
+    
+
+    def get_updates(self):
+        update_url = "http://" + self.base_url + "/getupdates"
+        result = self.call_api(update_url)
+
+        return result
+
+
+    def get_last(self):
+        update_url = "http://" + self.base_url + "/getlast"
+        result = self.call_api(update_url)
+
+        return result
+    
+
+    def fetch_data(self):
+        try:
+            if self.update_calls == 0:
+                fetch = self.get_last()   
+            else:
+                fetch = self.get_updates()
+                if not fetch["is_new"]:
+                    fetch = self.last_fetch
+                else:
+                    self.last_fetch = fetch
+            
+            data = fetch["data"]
+            has_queue = fetch["has_queue"]
+        except:
+            data = {}
+            has_queue = False
+            
+        self.update_calls += 1
+
+        return has_queue, data
+
+
+
+    def call_api(self, url):
+        ret = {}
+        try:
+            result = requests.get(url)
+            result = result.json()
+
+            if result.pop("status") == "ok":
+                ret = result
+        except:
+            logger.error("Bad api call for method {}.".format(url[url.rfind("/"):]))
+
+        return ret

app/broadcast/b_out.py

@@ -0,0 +1,86 @@
+import flask
+from flask import request, jsonify
+import numpy as np
+from threading import Thread
+
+
+import logging
+log = logging.getLogger('werkzeug')
+log.setLevel(logging.ERROR)
+# hide the info-messages of each GET-request
+
+
+
+
+class BroadcastUpdates:
+    """Broadcasts (out) updates for the hw-handler to be fetched periodically"""
+    
+    def __init__(self, port):
+        """"""
+        self.last_show = ""
+
+        self.queue = [] #[{"matrices" : [np.full((16,16,3), 10).tolist(), np.full((16,16,3), 100).tolist(), np.full((16,16,3), 200).tolist()]} for _ in range(4)]
+        self.port = port
+
+
+    def start(self):
+        t = Thread(target=self.run)
+        t.start()
+
+
+    def run(self):
+        app = flask.Flask(__name__)
+        
+        @app.route('/getupdates', methods=['GET'])
+        def get_updates():
+            return self.get_updates()
+        @app.route('/getlast', methods=['GET'])
+        def get_last():
+            return self.get_last()
+        
+        app.run('0.0.0.0', port=self.port)
+    
+    
+    def get_updates(self):
+        try:
+            data = self.queue.pop(0)
+            self.last_show = data
+            is_new = True
+            has_queue = len(self.queue) > 0
+        except:
+            data = ""
+            is_new = False
+            has_queue = False
+        
+        return self.generate_response(
+            is_new = is_new,
+            data = data,
+            has_queue = has_queue
+        )
+
+
+
+    def get_last(self):
+        try:
+            try:
+                data = self.queue[-1]
+                self.queue = []
+            except: # list empty
+               data = self.last_show,
+        except:
+            data = ""
+        return self.generate_response(
+            data = data,
+            has_queue = False,
+        )
+
+
+
+    def generate_response(self, **kwargs):
+        ret = {
+            "status" : "ok",
+            **kwargs
+        }
+        
+        return jsonify(ret)
+