Sketch loading events from Faacebook Graph API

These changes add an utility call (and a Makefile call) to fetch
events from Pyladies Facebook Pages.

Makefile

@@ -144,5 +144,8 @@ endif
 virtualenv:
 	$(VIRTUALENV) $(VENV)
 
+load-facebook-events:
+	$(PY) -c "import utils; utils.load_facebook_events(utils.PYLADIES_FACEBOOK_PAGES)"
+
 
 .PHONY: up html help clean regenerate serve serve-global devserver publish github newpost newpage

requirements.txt

@@ -3,3 +3,4 @@ Markdown==2.6.7
 ghp-import==0.4.1
 PyYAML==3.12
 beautifulsoup4==4.5.1
+facebook-sdk==2.0.0

utils/__init__.py

@@ -0,0 +1,89 @@
+import os
+from datetime import datetime
+
+import yaml
+from facebook import GraphAPI
+
+
+PYLADIES_FACEBOOK_PAGES = [
+    'pyladies',
+    'PyLadiesBrazil',
+    'PyLadiesSP',
+    'pyladiescps',
+    'PyLadiesTeresina',
+    'PyLadiesNatal',
+    'PyLadiesDuqueDeCaxias',
+    'pyladiesvale',
+    'pyladiesfloripa',
+    'PyLadiesCuritiba',
+    'pyladiesdf',
+    'pyladiesrp',
+    'PyLadiesSaoCarlos',
+    'pyladiesbh',
+    'pyladiespucrio',
+    'PyLadiesFortaleza',
+    'pyLadiesPHB',
+    'fundao.pyladies',
+    'pyladiesrio',
+    'PyLadiesPicos',
+    'pyladiesbelem',
+    'PyLadiesSalvador',
+    'pyladiesrecife',
+    'PyLadiesMaceio',
+    'pyladiespoa',
+    'PyLadiesSLZ',
+]
+
+
+def load_facebook_events(nodes, token=os.environ.get('FACEBOOK_TOKEN')):
+    """
+    Load events from Facebook pages to the events file.
+
+    ..important:
+
+        In order for this function to work, you need to to provide a valid
+        Facebook Graph API token. You can get yours easily on
+        https://developers.facebook.com/tools/explorer
+
+    :param nodes: Facebook nodes to load public events from.
+    :param token: Facebook Graph API token.
+    """
+
+    # Facebook settings
+    graph = GraphAPI(access_token=token)
+
+    with open('data/events.yml', 'r') as events_file:
+        existing_events = yaml.load(events_file)
+
+    # Get facebook metadata on existing entries
+    facebook_ids = {entry.get('facebook-id') for entry in existing_events}
+
+    fetched_events = []
+
+    for node in nodes:
+        event_node = "{}/events".format(node)
+        node_events = graph.get_object(event_node, limit=1000)
+
+        for event in node_events['data']:
+
+            # If event already exists, just ignore
+            if event['id'] in facebook_ids:
+                continue
+
+            format_date = datetime.strptime(event['start_time'],
+                                            '%Y-%m-%dT%H:%M:%S%z')
+
+            fetched_events.append({
+                'name': event['name'],
+                'url': 'https://facebook.com/{}'.format(event['id']),
+                'local': event.get('place', {}).get('name', ''),
+                'date': format_date.strftime('%d-%m-%Y'),
+                'facebook_id': str(event['id'])
+            })
+
+    with open('data/events.yml', 'a') as events_file:
+        for entry in fetched_events:
+            events_file.write('\n')
+            yaml.dump([entry], events_file,
+                      default_flow_style=False,
+                      allow_unicode=True)