X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=icalparse.py;h=cc41353903e8f4af09f9eb654509162d738dad31;hb=85843643c1e11a84cf8583ab58b07af8eba4057e;hp=780750b6fca4b82a26fc3ebe54c00d27d2275eec;hpb=06d5abddbe03b0f029e866e1e5cadf19e4aa66cc;p=frenchie%2Ficalparse.git

diff --git a/icalparse.py b/icalparse.py
index 780750b..cc41353 100755
--- a/icalparse.py
+++ b/icalparse.py
@@ -70,6 +70,19 @@ def lineFolder(oldcal, length=75):
 	return cal
 
 
+def splitFields(cal):
+	'''Takes a list of lines in a calendar file and returns a list of key, value pairs'''
+
+	ical = [tuple(x.split(':',1)) for x in cal]
+
+	# Check that we got 2 items on every line
+	for line in ical:
+		if not len(line) == 2:
+			raise InvalidICS, "Didn't find a content key on: %s"%(line)
+
+	return ical
+
+
 def getContent(url='',stdin=False):
 	'''Generic content retriever, DO NOT use this function in a CGI script as
 	it can read from the local disk (which you probably don't want it to).
@@ -97,7 +110,7 @@ def getContent(url='',stdin=False):
 		res = urllib2.urlopen(url)
 		content = res.read()
 		res.close()
-	except (urllib2.URLError, ValueError), e:
+	except (urllib2.URLError, OSError), e:
 		sys.stderr.write('%s\n'%e)
 		sys.exit(1)
 	return content
@@ -131,12 +144,56 @@ def getHTTPContent(url='',cache='.httplib2-cache'):
 	try:
 		content = urllib2.urlopen(url).read()
 		return content
-	except urllib2.URLError, e:
+	except (urllib2.URLError, OSError), e:
 		sys.stderr.write('%s\n'%e)
 		sys.exit(1)
 
 	return ''
 
+
+def generateRules():
+	'''Attempts to load a series of rules into a list'''
+	try:
+		import parserrules
+	except ImportError:
+		return []
+
+	rules = [getattr(parserrules, rule) for rule in dir(parserrules) if callable(getattr(parserrules, rule))]
+	return rules
+
+
+def applyRules(ical, rules=[], verbose=False):
+	'Runs a series of rules on the lines in ical and mangles its output'
+
+	for rule in rules:
+		output = []
+		if rule.__doc__ and verbose:
+			print(rule.__doc__)
+		for line in ical:
+			try:
+				out = rule(line[0],line[1])
+			except TypeError, e:
+				output.append(line)
+				print(e)
+				continue
+
+			# Drop lines that are boolean False
+			if not out and not out == None: continue
+
+			# If the rule did something and is a tuple or a list we'll accept it
+			# otherwise, pay no attention to the man behind the curtain
+			try:
+				if tuple(out) == out or list(out) == out and len(out) == 2:
+					output.append(tuple(out))
+				else:
+					output.append(line)
+			except TypeError, e:
+				output.append(line)
+
+		ical = output
+
+	return ical
+
 if __name__ == '__main__':
 	from optparse import OptionParser
 	# If the user passed us a 'stdin' argument, we'll go with that,
@@ -160,4 +217,5 @@ if __name__ == '__main__':
 
 	content = getContent(url, options.stdin)
 	cal = lineJoiner(content)
-	print cal
+	ical = applyRules(splitFields(cal), generateRules())
+	print ical