split blob in to functions & add update utility

event_feed.py

@@ -11,6 +11,7 @@ import shutil
 from slugify import slugify
 from natural import date
 from event_feed_config import calendar_url, output_dir
+import arrow
 
 cal = Calendar(requests.get(calendar_url).text)
 
@@ -25,66 +26,92 @@ template = env.get_template('event_template.md')
 
 existing_posts = os.listdir(output_dir)
 
+def create_metadata(event):
+    #construct a formatted dict of event metadata for in a post
+    event_metadata = {
+    'name':event.name,
+    'created':event.created.format(),
+    'description': event.description,
+    'localized_begin': '           '.join(localize_time(event.begin)), #non-breaking space characters to defeat markdown
+    'begin': event.begin.format(),
+    'end': event.end.format(),
+    'duration': date.compress(event.duration),
+    'location': event.location,
+    'uid': event.uid
+    }
+
+    return event_metadata
+
+def localize_time(date):
+    # Dates need to be displayed for the various TZs
+    # takes arrow objects
+
+    # 3 PM Kassel, Germany, 4 PM Ramallah/Jerusalem, Palestina (QoF),
+    # 8 AM Bogota, Colombia (MaMa), 8 PM Jakarta, Indonesia (Gudskul),
+    # 1 PM (+1day) Wellington, New Zealand (Fafswag), 9 AM Havana, Cuba (Instar).
+
+    tzs = [
+          ('Kassel','Europe/Berlin'),
+          ('Bamako', 'Europe/London'),
+          ('Palestine','Asia/Jerusalem'),
+          ('Bogota','America/Bogota'),
+          ('Jakarta','Asia/Jakarta'),
+          ('Makassar','Asia/Makassar'),
+          ('Wellington', 'Pacific/Auckland')
+          ]
+
+    localized_begins =[]
+    for location, tz in tzs:
+        localized_begins.append( #javascript formatting because of string creation from hell
+            '__{}__ {}'.format(
+                str(location),
+                str(date.to(tz).format("YYYY-MM-DD __HH:mm__"))
+                )
+            )
+    return localized_begins
+
+def create_event_post(post_dir, event):
+    
+    event_metadata = create_metadata(event)
+
+    if not os.path.exists(post_dir):
+        os.mkdir(post_dir)
+
+    with open(os.path.join(post_dir,'index.md'),'w') as f:
+        post = template.render(event = event_metadata)
+        f.write(post)
+        print('created post for', event.name, '({})'.format(event.uid))
+
+    with open(os.path.join(post_dir,'.timestamp'),'w') as f:
+        f.write(event_metadata['created'])
+
+
+def update_event_post(post_dir, event):
+    if os.path.exists(post_dir):
+        old_timestamp = open(os.path.join(post_dir,'.timestamp')).read()
+        if event.created > arrow.get(old_timestamp):
+            print('Updating', event.name, '({})'.format(event.uid))
+            create_event_post(post_dir, event)
+        else:
+            print('Event current: ', event.name, '({})'.format(event.uid))
 
-# Dates need to be displayed for the various TZs
-# 3 PM Kassel, Germany, 4 PM Ramallah/Jerusalem, Palestina (QoF),
-# 8 AM Bogota, Colombia (MaMa), 8 PM Jakarta, Indonesia (Gudskul),
-# 1 PM (+1day) Wellington, New Zealand (Fafswag), 9 AM Havana, Cuba (Instar).
+for event in list(cal.events):
 
-tzs = [
-	  ('Kassel','Europe/Berlin'),
-	  ('Bamako', 'Europe/London'),
-	  ('Palestine','Asia/Jerusalem'),
-	  ('Bogota','America/Bogota'),
-	  ('Jakarta','Asia/Jakarta'),
-	  ('Makassar','Asia/Makassar'),
-	  ('Wellington', 'Pacific/Auckland')
-	  ]
+    post_dir = os.path.join(output_dir, event.uid)
 
+    if event.uid not in existing_posts: 
+        #if there is an event we dont already have, make it
+        create_event_post(post_dir, event)
 
-for event in list(cal.events):
+    elif event.uid in existing_posts: 
+        #if we already have it, update
+        update_event_post(post_dir, event)
+        existing_posts.remove(event.uid) # create list of posts which have not been returned by the calendar
+        
 
-	localized_begins =[]
-	for i in tzs:
-		localized_begins.append( #javascript formatting because of string creation from hell
-			'__{}__ {}'.format(
-				str(i[0]),
-				str(event.begin.to(i[1]).format("YYYY-MM-DD __HH:mm__"))
-				)
-			)
-
-
-	event_metadata = {
-	'name':event.name,
-	'created':event.created.format(),
-	'description': event.description,
-	'localized_begin': '           '.join(localized_begins), #non-breaking space characters to defeat markdown
-	'begin': event.begin.format(),
-	'end': event.end.format(),
-	'duration': date.compress(event.duration),
-	'location': event.location
-	}
-
-
-	if event.uid not in existing_posts: #if there is an event we dont already have, make it
-		post_dir = os.path.join(output_dir, event.uid )
-
-		if not os.path.exists(post_dir):
-			os.mkdir(post_dir)
-		
-		with open(os.path.join(post_dir,'index.md'),'w') as f:
-			post = template.render(event = event_metadata)
-			f.write(post)
-			print('created post for', event.name, '({})'.format(event.uid))
-
-	elif event.uid in existing_posts: #if we already have it, update
-
-		existing_posts.remove(event.uid) # create list of posts which have not been returned by the calendar
-		#FIXME: An update logic? e.g. exists but creation date is altered.
-		print(event.uid, 'already exists')
-
-for post in existing_posts: #remove events that have been deleted 
-    print('deleted', post) #rm posts not returned 
+for post in existing_posts: 
+    #remove events not returned by the calendar (deletion) 
+    print('deleted', post) 
     shutil.rmtree(os.path.join(output_dir,post))