Implement !giveaway command

clients/twitch.py

@@ -1,5 +1,7 @@
+import datetime
 import functools
 import re
+import time
 import unicodedata
 
 import irc.bot
@@ -52,6 +54,17 @@ SUB_GIFTED_PATTERN = re.compile(r'''^
     (?P<receiver>.+)!\s+
     So\s+kind\s+<3\s+!$''', re.VERBOSE)
 
+# A giveaway for: $prize has started! $entitled can join!
+GIVEAWAY_STARTED_PATTERN = re.compile(r'''^
+    A\s+giveaway\s+for:\s+
+    (?P<prize>.+)\s+has\s+started!\s+
+    (?P<entitled>.+)\s+can\s+[jJ]oin!?$''', re.VERBOSE)
+
+# Entries have stopped for the giveaway! You can no longer enter!
+GIVEAWAY_ENDED_PATTERN = re.compile(r'''^
+    Entries\s+have\s+stopped\s+for\s+the\s+giveaway!\s+
+    You\s+can\s+no\s+longer\s+enter!$''', re.VERBOSE)
+
 
 class TwitchClient(irc.bot.SingleServerIRCBot):
     def __init__(self, config, logger, commands, extra_commands):
@@ -59,6 +72,7 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
         self.logger = logger
         self.commands = commands
         self.extra_commands = extra_commands
+        self.giveaway = None
         self.patterns = [
             (QUOTE_ADDED_PATTERN, self._add_quote),
             (QUOTE_EDITED_PATTERN, self._edit_quote),
@@ -66,6 +80,8 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
             (SUB_PATTERN, self._record_sub),
             (RESUB_PATTERN, self._record_resub),
             (SUB_GIFTED_PATTERN, self._record_gifted_sub),
+            (GIVEAWAY_STARTED_PATTERN, self._process_giveaway_start),
+            (GIVEAWAY_ENDED_PATTERN, self._process_giveaway_end),
         ]
         self.supported_commands = [
             (re.compile(r'^!lastquote$'), self._do_lastquote),
@@ -75,6 +91,7 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
             (re.compile(r'^!(bella(gram|pics)|insta(gram|bella))$'), self._do_bellagram),
             (re.compile(r'^!yt\s+(?P<q>")?(?P<query>.+)(?(q)")$'), self._do_yt),
             (re.compile(r'^!clip\s+(?P<q>")?(?P<filter>.+)(?(q)")$'), self._do_clip),
+            (re.compile(r'^!giveaway$'), self._do_giveaway),
             (re.compile(r'^!command\s+set\s+(?P<q1>")?(?P<cmd>.+?)(?(q1)")\s+'
                         r'(?P<q2>")?(?P<resp>.+)(?(q2)")$'), self._do_command_set),
             (re.compile(r'^!command\s+unset\s+(?P<q>")?(?P<cmd>.+)(?(q)")$'), self._do_command_unset),
@@ -186,6 +203,13 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
         except CommandError as e:
             self.logger.error('Failed to record gifted sub: %s', e)
 
+    def _process_giveaway_start(self, tags, send_response, prize, entitled, **kwargs):
+        starttime = kwargs.get('time', datetime.datetime.utcnow())
+        self.giveaway = (starttime, prize, entitled)
+
+    def _process_giveaway_end(self, tags, send_response, **kwargs):
+        self.giveaway = None
+
     def _do_lastquote(self, tags, send_response, **kwargs):
         try:
             quote = self.commands.last_quote()
@@ -264,6 +288,19 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
         else:
             send_response('{0}: {1}'.format(result['title'], result['url']))
 
+    def _do_giveaway(self, tags, send_response, **kwargs):
+        if not self.giveaway:
+            send_response('There is currently no giveaway in progress')
+            return
+        starttime, prize, entitled = self.giveaway
+        elapsed = (datetime.datetime.utcnow() - starttime).total_seconds()
+        if elapsed > 2 * 60 * 60:
+            self.giveaway = None
+            send_response('There is currently no giveaway in progress')
+            return
+        elapsed = time.strftime('%H:%M', time.gmtime(elapsed))
+        send_response('Giveaway for {0} is open (for {1})! {2} can join!'.format(prize, elapsed, entitled))
+
     def _do_command_set(self, tags, send_response, cmd, resp, **kwargs):
         if not self._is_mod(tags):
             send_response('Sorry @{0}, you are not allowed to do this'.format(tags['display-name']))