Added serverside modeling

cache.py

@@ -0,0 +1,34 @@
+from datetime import datetime, timedelta
+
+cache = {}
+
+class Cache():
+    def get(key, notOlderThanHours = 24):
+       #print('get key ' + key)
+       if key in cache:
+           cacheobj = cache[key] 
+           if(not cache):
+               return None
+           if(cacheobj.isOlderThanHours(notOlderThanHours)):
+               print('removing cacheobject ' + key)
+               del cache[key]
+               return None
+           #print('returning cacheobject ' + key)
+           return cacheobj.obj
+
+    def add(key, obj):
+        print('adding cacheobject ' + key)
+        cacheobj = CacheObj(key, obj)
+        cache[key] = cacheobj
+
+
+class CacheObj:
+    def __init__(self, key, obj):
+        self.key = key
+        self.obj = obj
+        self.time=datetime.now()
+    
+    def isOlderThanHours(self, hours):
+        #print(f'checking time cacheobject {self.time} < {datetime.now() - timedelta(hours=hours)}')
+        return self.time < datetime.now() - timedelta(hours=hours)
+