#vim: tabstop=4 shiftwidth=4 expandtab
"""
tagger.py
Create your own tagging markup

Inside your stories, you can use markup like so:
"B00082IJ08"[amazon]

In your flavour_dir or datadir or wherever you keep your templates,
create a file called format.content_type (replace content type with
whatever content_type (html, rss, etc))

Inside format.content_type, have this:
	
#amazon
text = '<a href="http://www.amazon.com/exec/obidos/ASIN/%s"><img src="http://images.amazon.com/images/P/%s.01.MZZZZZZZ.jpg" align="left"/></a>' % (text, text)

The tagging plugin will exec the code and replace the information inside the quotes.

You can specify exec code on more than one line. For instance, an image link:
"/images/cover.jpg;http://www.yahoo.com"[imagelink]

And inside the format file:

#imagelink
(imagesrc,linksrc) = text.split(';')
text = '<a href="%s"><img src="%s" /></a>' % (linksrc, imagesrc)

You can also group tags. They will be executed from left to right. So you can have:
"Text that will be bold and italic"[b,i]

format.content_type:
#b
text = "<b>%s</b>" % text

#i
text = "<i>$s</i>" % text

The tag idea was originally used in the magiclink plugin for blosxom. I made it a bit more flexible and converted it to python.

Questions, comments and fixes can be sent to joe@terrarum.net
"""

__author__ = 'Joe Topjian <joe@terrarum.net>'
__version__ = "$Id: tagger.py, v 1 2005/0/29 joe Exp $"
__url__ = "http://joe.terrarum.net"
PREFORMATTER_ID = 'tagger'

import re, os.path
formats = { }
def replace(text,format):
	if ',' in format:
		for f in format.split(','):
			if formats.has_key(f): exec(formats[f])
	else:
		if formats.has_key(format): exec(formats[format])
	return text

def cb_start(args):
	code = []
	r = args["request"]
	config = r.getConfiguration()
	data = r.getData()
	form = r.getForm()
	data['flavour'] = (form.has_key('flav') and form['flav'].value or config.get('default_flavour', 'html'))
	if config.has_key("flavourdir"):
		flavourpath = config["flavourdir"]
	else:
		flavourpath = config["datadir"]

	filelocation = os.path.join(flavourpath, "format.%s" % data["flavour"])
	if not os.path.isfile(filelocation): return 0
	file = open(filelocation)
	for line in file:
		if line[0] == '#':
			if code:
				formats[curr] = "\n".join(code)
				code = []
			curr = line.replace('#','').rstrip()
		else:
			code.append(line)
	formats[curr] = "\n".join(code)

def cb_preformat(args):
	if args['parser'] == PREFORMATTER_ID:
		return parse(''.join(args['story']))

def parse(text):
	formatre = re.compile(r'"([\w\s\-\.\+\:\/\;\~\=\?\&\# ]+)"\[([\,\w]+)\]')
	m = formatre.search(text)
	while m:
		tmp = replace(m.group(1), m.group(2))
		text = formatre.sub(tmp, text, count=1)
		m = formatre.search(text)
	return text