From b98e064c24562de8401d720c09d3be5f34a79a1a Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 15 Aug 2012 16:06:33 +0200
Subject: Initial version

---
 mensahl.py | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100755 mensahl.py

diff --git a/mensahl.py b/mensahl.py
new file mode 100755
index 0000000..9f167a3
--- /dev/null
+++ b/mensahl.py
@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import html.parser
+import json
+import re
+import sys
+
+from datetime import datetime, timedelta
+from urllib.request import urlopen
+
+
+### Config ###
+mensa_url = 'http://www.uni-kiel.de/stwsh/seiten_essen/plan_mensa_luebeck.html'
+encoding = 'ISO-8859-1'
+meal_types = ['Eintopf', 'Hauptgericht', 'Vegetarisches Hauptgericht', 'Beilagen']
+### Config end ###
+
+
+class Mensa:
+	def __init__(self):
+		self._HTMLparser = html.parser.HTMLParser()
+
+		self._re_data_match = re.compile(r'^.*?<table[^>]*>.*?<td[^>]*>.*?(\d+)\.(\d+)\. ?- ?\d+\.\d+\.(\d+).*?</td>.*?<td[^>]*>Freitag</td>\s*</tr>(.*?)</table>.*$', re.DOTALL|re.IGNORECASE)
+		self._re_day_match = re.compile(r'.*?<tr[^>]*>(.*?)</tr>.*?<tr[^>]*>(.*?)</tr>', re.DOTALL|re.IGNORECASE)
+		self._re_meal_match = re.compile(r'.*?<td[^>]*>(.*?)</td>', re.DOTALL|re.IGNORECASE)
+
+	def _unescape_strip(self, s):
+		s = self._HTMLparser.unescape(s)
+		s = s.replace('<br />', ' ')
+		s = re.sub(r'-\s+', '-', s)
+		s = re.sub(r'\s+', ' ', s)
+		s = re.sub(r'([a-zäöüß])-([a-zäöüß])', r'\1\2', s)
+		s = re.sub(r'<img[^>]*logo_bio[^>]*>', 'Bio', s)
+		s = re.sub(r'<[^>]*>', '', s)
+		return s.strip()
+
+	def _handle_data_row(self, data, pos):
+		match = self._re_day_match.match(data, pos)
+
+		if not match:
+			return None
+
+		ret = []
+		mealpos = 0
+		pricepos = 0
+
+		for day in range(0,5):
+			mealmatch = self._re_meal_match.match(match.group(1), mealpos)
+			pricematch = self._re_meal_match.match(match.group(2), pricepos)
+
+			if not mealmatch or not pricematch:
+				return None
+
+			ret.append((self._unescape_strip(mealmatch.group(1)), self._unescape_strip(pricematch.group(1))))
+			mealpos = mealmatch.end()
+			pricepos = pricematch.end()
+
+		return (ret, match.end())
+
+	def handle_data(self, data):
+		match = self._re_data_match.match(data)
+
+		if not match:
+			return None
+
+		firstday = datetime.strptime('%s-%s-%s' % (match.group(3), match.group(2), match.group(1)), '%Y-%m-%d').date()
+
+		data = match.group(4)
+
+		meals = []
+		pos = 0
+
+		for i in range(0, len(meal_types)):
+			row = self._handle_data_row(data, pos)
+
+			if not row:
+				break
+
+			meals.append(row[0])
+			pos = row[1]
+
+		if len(meals) == 0:
+			return None
+
+		while len(meals) < len(meal_types):
+			meals.append([[None], [None], [None], [None], [None]])
+
+		ret = []
+
+		for weekday in range(0, 5):
+			mealdict = dict()
+
+			for i in range(0, len(meal_types)):
+				if meals[i][weekday][0]:
+					mealdict[meal_types[i]] = {
+						'name' : meals[i][weekday][0],
+						'price' : meals[i][weekday][1],
+						}
+
+			if (len(mealdict) > 0) or True:
+				daydict = dict()
+				daydict['date'] = (firstday + timedelta(weekday)).strftime('%Y-%m-%d')
+				daydict['meals'] = mealdict
+
+				ret.append(daydict)
+
+		return ret
+
+
+if __name__ == '__main__':
+	try:
+		data = urlopen(mensa_url, None, 20).read().decode(encoding)
+	except:
+		data = None
+
+	if not data:
+		print("Could not read Mensa data", file=sys.stderr)
+		sys.exit(1)
+
+	meals = Mensa().handle_data(data)
+	if not meals:
+		print("No or invalid Mensa data was returned", file=sys.stderr)
+		sys.exit(1)
+
+	json.dump(meals, sys.stdout, ensure_ascii=False)
-- 
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