Add reactions plugin

plugins/reactions.py

@@ -0,0 +1,51 @@
+# react.py
+# Necessary plugin for productive Slack orgs.
+# Eryn Wells <eryn@erynwells.me>
+
+import logging
+import re
+import requests
+
+LOGGER = logging.getLogger('react')
+
+EXTENSIONS = ('', '.gif', '.png', '.jpg')
+MESSAGE_RE = re.compile(r'(!react)\s+(\w+)')
+
+#
+# rtmbot interface
+#
+
+config = None
+outputs = []
+
+def process_message(data):
+    LOGGER.debug(config)
+    if 'reactions_root' not in config:
+        LOGGER.error('Please define the root URL where reactions live in config.reactions_root')
+        return
+
+    try:
+        text = data['text']
+    except KeyError:
+        LOGGER.debug('Missing "text" key in data.')
+        return
+
+    # find the message
+    match = MESSAGE_RE.match(text)
+    if not match:
+        return
+    reaction = match.group(2)
+    if not reaction:
+        LOGGER.info('Reaction command but no reaction.')
+
+    for ext in EXTENSIONS:
+        url = '{}/{}{}'.format(config['reactions_root'], reaction, ext)
+        LOGGER.debug('Checking url: %s', url)
+        r = requests.head(url)
+        if r.status_code != 200:
+            continue
+        outputs.append([data['channel'], url])
+        break
+    else:
+        outputs.append([data['channel'], 'Sorry, no reaction by that name'])
+