refactoring

1 files changed, 25 insertions, 23 deletions

diff --git a/track_status.py b/track_status.py
index f930f4c..2761b2b 100644
--- a/track_status.py
+++ b/track_status.py
@@ -2,10 +2,7 @@
 # This file is licensed under the terms of the MIT License.
 # See LICENSE.txt for details.
 
-import argparse
-import logging
-import time
-import sys
+import logging, time
 
 from api import *
 
@@ -55,36 +52,41 @@ def print_status_update(user):
     else:
         user_went_offline(user)
 
-def parse_timeout(source):
-    timeout = int(source)
-    if timeout < 1:
-        raise argparse.ArgumentTypeError(
-            'please specify a positive number of seconds as refresh timeout')
-    return timeout
+USER_FIELDS = User.Field.ONLINE, User.Field.LAST_SEEN
+
+def update_status(api, uids):
+    return {user.get_uid(): user for user in api.users_get(uids, USER_FIELDS)}
 
 DEFAULT_TIMEOUT=5
 
-def loop_update_status(api, user_ids, timeout=DEFAULT_TIMEOUT):
-    fields = User.Field.ONLINE, User.Field.LAST_SEEN
-    users = list(api.users_get(user_ids, fields))
-    for user in users:
-        print_status(user)
+def loop_update_status(api, uids, timeout=DEFAULT_TIMEOUT):
+    users = update_status(api, uids)
+    for uid in users:
+        print_status(users[uid])
     while True:
         time.sleep(timeout)
-        updated_users = list(api.users_get(user_ids, fields))
-        for i in range(len(updated_users)):
-            if users[i].is_online() != updated_users[i].is_online():
-                users[i] = updated_users[i]
-                print_status_update(updated_users[i])
+        updated_users = update_status(api, uids)
+        for uid in updated_users:
+            if users[uid].is_online() != updated_users[uid].is_online():
+                users[uid] = updated_users[uid]
+                print_status_update(updated_users[uid])
 
 if __name__ == '__main__':
+    import argparse, sys
+
+    def natural_number(s):
+        x = int(s)
+        if x < 1:
+            raise argparse.ArgumentTypeError()
+        return x
+
     parser = argparse.ArgumentParser(
         description='Track when people go online/offline.')
 
-    parser.add_argument(metavar='UID', dest='user_ids', nargs='+',
+    parser.add_argument(metavar='UID', dest='uids', nargs='+',
                         help='user IDs or "screen names"')
     parser.add_argument('-t', '--timeout', default=DEFAULT_TIMEOUT,
-                        type=parse_timeout,
+                        type=natural_number,
                         help='set refresh interval (seconds)')
     parser.add_argument('-l', '--log', type=argparse.FileType('w'),
                         default=sys.stdout,
@@ -99,7 +101,7 @@ if __name__ == '__main__':
     api = API(Language.EN)
 
     try:
-        loop_update_status(api, args.user_ids, timeout=args.timeout)
+        loop_update_status(api, args.uids, timeout=args.timeout)
     except KeyboardInterrupt:
         pass
     except Exception as e: