Cache data for 30 seconds

Signed-off-by: Markus Birth <markus@birth-online.de>

main.py

@@ -1,6 +1,7 @@
 from microdot import Microdot
 from microdot.utemplate import Template
 import tflcountdown as tfl
+import time
 
 # utemplate doc: https://github.com/pfalcon/utemplate
 
@@ -21,12 +22,22 @@ LINE_IDS = {
 
 app = Microdot()
 tflc = tfl.TflCountdown(API_KEY)
+cached_data = {}
+cached_time = -1
 
 @app.route("/")
 async def index(request):
-    response = tflc.get_countdown(["1597", "1598", "11333", "11334", "R0199"])
-    data = tflc.parse_countdown(response.text)
-    print(repr(data))
+    global cached_data, cached_time
+    now = time.time()
+    if now - cached_time > 30:
+        response = tflc.get_countdown(["1597", "1598", "11333", "11334", "R0199"])
+        data = tflc.parse_countdown(response.text)
+        print(repr(data))
+        cached_data = data
+        cached_time = now
+    else:
+        print("Cache hit!")
+        data = cached_data
     return Template("index.html").render(data), {"Content-Type": "text/html"}
 
 app.run(port=5001, debug=True)