#!/usr/bin/env python

import os, re

class TemplateWriter:
	templatefile = "gerippe.tmpl"
	tmpldir = "./placeholder"
	contentdir = "./content"
	tmplfileext = ".tmpl"
	outfileext = ".html"
	## regular expressions of not-wanted file/directory names
	## for now: no svn, no vi-swap files, no backup files
	ignore_items = [ r'\.svn', r'\.swp$', r'~$' ]

	def __init__(self):
		pass
	

	def get_sorted(self, flist):
		result = flist[:]
		result.sort()
		return result


	def get_filtered(self, flist):
		result = []
		for item in flist:
			found = False
			for expression in self.ignore_items:
				if re.search(expression, item):
					found = True
					continue
			if not found:
				result.append(item)
		return result


	def string_replace(self, infile, outfile):
		template = open(infile).read()
		open(outfile, "w").write(template)
		text = {}
		for tmpl in self.get_sorted(self.get_filtered(os.listdir(self.tmpldir))):
			tmplfile = str(os.path.join(self.tmpldir, tmpl))
			if not os.path.isfile(tmplfile):
				print "    str.repl: cancelling %s - not a file" % tmplfile
			else:
				template = open(outfile).read()
				print "    str.repl: using %s"  % tmplfile
				newcontent = open(tmplfile).read()
				text[tmpl] = template.replace("<!-- $%s$ -->" % tmpl, newcontent)
				open(outfile, "w").write(text[tmpl])
		return


	def build_sites(self):
		'''use all files ending with .tmpl'''
		for tmplfile in self.get_sorted(self.get_filtered(os.listdir("./"))):
			if tmplfile.rfind(self.tmplfileext) >= 1:
				infile = tmplfile
				(tmplfilename, tmplfileext)=os.path.splitext(tmplfile)
				outfile = tmplfilename + self.outfileext
				print "building: %s -> %s" % (tmplfile, outfile)
				self.string_replace(infile, outfile)
		return


	def build_sites_from_gerippe(self):
		print "Let's build some html files from: %s" % self.templatefile
		for html in self.get_sorted(self.get_filtered(os.listdir(self.contentdir))):
			print "  building: %s%s" % (html, self.outfileext)
			entries = ""
			for entry in self.get_sorted(self.get_filtered(os.listdir(os.path.join(self.contentdir, html)))):
				print "    adding entry: %s " % entry
				entries += open(os.path.join(self.contentdir, html, entry)).read()

			template = open(self.templatefile).read()
			text = template.replace("<!-- $entries$ -->", entries)
			infile = html+".tmp"
			open(infile,"w").write(text)
			outfile = html+self.outfileext
			self.string_replace(infile, outfile)
			os.unlink(infile)
		return


if __name__ == "__main__":
	TemplateWriter().build_sites_from_gerippe()