from django import template
import re

register = template.Library()

def makelinks(pageTitle, pageUrl, titleSeparator="|"):
    """Generates a quick-and-dirty navigation bar with a Django filter."""
    
    # Assume direct mapping between the flatpages <title> and the url hierarchy
    pageTitles = [p.strip() for p in pageTitle.split(titleSeparator)]
    pageUrls = pageUrl.strip("/").split("/")
    
    outputText = []
    c = 1
    
    # Return blank if in the root directory
    if pageTitles[0] == '':
        return ''
    
    try:
        for title in pageTitles:
            outputText.append(' &raquo; <a href="/%s">%s</a>' % ('/'.join(pageUrls[0:c]), title.lower()))
            c += 1
    except:
        pass

    return ''.join(outputText)
    
register.filter(makelinks)