From d20dc4df2ab191c19394a38a5a3091cce9007a4f Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Mon, 21 Sep 2020 23:06:26 +0300
Subject: Start refactoring functions

---
 iss.py | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/iss.py b/iss.py
index 3678f7a..fa4aeff 100644
--- a/iss.py
+++ b/iss.py
@@ -1,21 +1,23 @@
 from skyfield.api import Topos, load
 
-stations_url = 'http://celestrak.com/NORAD/elements/stations.txt'
-satellites = load.tle_file(stations_url)
-print('Loaded', len(satellites), 'satellites')
+TEL_AVIV = Topos('32.0853 N', '34.7817 E')
+ISS = "ISS (ZARYA)"
 
-by_name = {sat.name: sat for sat in satellites}
-satellite = by_name['ISS (ZARYA)']
-print(satellite)
+def init_stations():
+    stations_url = 'http://celestrak.com/NORAD/elements/stations.txt'
+    return load.tle_file(stations_url)
 
-tlv = Topos('32.0853 N', '34.7817 E')
+def get_predictions(location=TEL_AVIV, satellite_name=ISS):
+    satellites = init_stations()
+    by_name = {sat.name: sat for sat in satellites}
+    satellite = by_name[satellite_name]
 
-ts = load.timescale()
-t0 = ts.utc(2020, 9, 20)
-t1 = ts.utc(2020, 9, 30)
+    ts = load.timescale()
+    t0 = ts.now()
+    t1 = ts.utc(2020, 9, 30)
 
-t, events = satellite.find_events(tlv, t0, t1, altitude_degrees=60.0)
-for ti, event in zip(t, events):
-    name = ('rise above 30°', 'culminate', 'set below 30°')[event]
-    print(ti)
-    print(ti.utc_strftime('%Y %b %d %H:%M:%S'), name)
+    t, events = satellite.find_events(location, t0, t1, altitude_degrees=60.0)
+    for ti, event in zip(t, events):
+        name = ('rise above 30°', 'culminate', 'set below 30°')[event]
+        print(ti)
+        print(ti.utc_strftime('%Y %b %d %H:%M:%S'), name)
-- 
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