Added WolframAlpha calculator module.

1 files changed, 72 insertions, 0 deletions

diff --git a/modules/wacalc.py b/modules/wacalc.py
new file mode 100644
index 0000000..4d40ade
--- /dev/null
+++ b/modules/wacalc.py
@@ -0,0 +1,72 @@
+info = {
+	'author': 'Jon Bergli Heier',
+	'title': 'WolframAlpha calculator',
+	'description': 'WolframAlpha calculator',
+}
+
+import urllib, urllib2, re
+from xml.etree.ElementTree import ElementTree
+
+whitespace_re = re.compile(r'\s+')
+
+class Module(object):
+	config_section = 'module/wacalc'
+
+	def __init__(self, bot):
+		self.irc = bot
+		if self.irc:
+			self.irc.register_keyword('!wacalc', self)
+			if config.has_option(self.config_section, 'register_gcalc'):
+				# Register gcalc trigger for the obsolete gcalc module
+				self.irc.register_keyword('!gcalc', self)
+
+	def keyword(self, nick, channel, kw, msg):
+		target = channel if not channel == self.irc.nickname else nick.split('!')[0]
+		if not len(msg.strip()):
+			self.irc.msg(target, 'Usage: !wacalc query')
+			return
+		query = {
+			'appid': config.get(self.config_section, 'api_key'),
+			'format': 'plaintext',
+			'input': msg,
+		}
+		if config.has_option(self.config_section, 'location'):
+			query['location'] = config.get(self.config_section, 'location')
+		u = urllib2.urlopen('http://api.wolframalpha.com/v2/query?%s' % urllib.urlencode(query))
+		xmldoc = ElementTree()
+		xmldoc.parse(u)
+		xml = xmldoc.getroot()
+		if xml.attrib['success'] != 'true':
+			tips = xml.find('tips')
+			dym = xml.find('didyoumeans')
+			message = None
+			if tips is not None and len(tips):
+				message = 'Tip: %s' % tips[0].attrib['text'].encode('utf-8')
+			elif dym is not None and len(dym):
+				# TODO: sort by score
+				message = 'Did you mean "%s"?' % dym[0].text.encode('utf-8')
+			if message:
+				message = 'No result (%s)' % message
+			else:
+				message = 'No result.'
+			self.irc.msg(target, message)
+			return
+
+		right = None
+		left = msg
+		def pod_plaintext(pod):
+			result = pod.find('subpod/plaintext')
+			if result is not None and result.text is not None:
+				text = result.text
+				text = whitespace_re.sub(' ', text)
+				return text.encode('utf-8')
+		for pod in xml.findall('pod'):
+			pod_id = pod.attrib['id']
+			if pod_id == 'Result':
+				right = pod_plaintext(pod)
+			elif pod_id == 'Input':
+				left = pod_plaintext(pod)
+		if left and right:
+			self.irc.msg(target, '%s = %s' % (left, right))
+		else:
+			self.irc.msg(target, 'Something failed.')