Updated to have a cache that survives the restart of the application

Added ability to call the api to let the filecache refresh every night

cache.py

@@ -1,4 +1,10 @@
 from datetime import datetime, timedelta
+import os.path
+from pathlib import Path
+import time
+import json
+
+from models.location import JsonEncoder
 
 cache = {}
 
@@ -29,6 +35,33 @@ class CacheObj:
         self.time=datetime.now()
     
     def isOlderThanHours(self, hours):
-        #print(f'checking time cacheobject {self.time} < {datetime.now() - timedelta(hours=hours)}')
+        print('checking time cacheobject ' + self.key + ': ' + str(self.time) + " < " + str(datetime.now() - timedelta(hours=hours)))
         return self.time < datetime.now() - timedelta(hours=hours)
-    
+  
+      
+class FileCache():
+  def get(key, notOlderThanHours = 24):
+      
+      filepath = "./filecache/" + key + ".json"
+      cachefile = Path(filepath)
+      if cachefile.is_file():
+        ti_m = os.path.getmtime(filepath)
+        #checks last modified age of file, and removes it if it is too old
+        print('checking time cachefile ' + filepath + ': ' + str(ti_m) + " < " + str(time.time() - (3600 * notOlderThanHours)))
+        if(ti_m < time.time() - (3600 * notOlderThanHours)):
+          print()
+          os.remove(filepath);
+          return None;
+        
+        with open(filepath) as json_file:
+          json_data = json.load(json_file);
+          print('returning json data from cachefile: ' + key)
+          return json_data;
+        
+      return None
+
+  def add(key, obj):
+        print(str(datetime.now()) + ' adding filecacheobject ' + key);
+        json_data = JsonEncoder().encode(obj)
+        with open("./filecache/" + key + ".json", 'w') as f:
+          f.write(json_data)