# -*- coding: utf-8 -*-

"""
	MoinMoin - show plugin with fall-back for non-native languages

	@copyright: 2007 by Daniel de Kok
	@license: GNU GPL
"""

from MoinMoin.Page import Page

nonEnglishLangs = ['es', 'fr', 'nl']
unknownPageMessages = {
	'nl': 'Er bestaat geen vertaling van deze pagina, daarom wordt de ' + \
		'Engelstalige pagina getoond!',
}


def execute(pagename, request):
	page = Page(request, pagename)

	# If the requested page exists, all is fine, and we can return
	if page.exists():
		page.send_page(request)
		return

	# Does the page name have the form <lang>/Foo/Bar?
	pageParts = pagename.split('/')
	if len(pageParts) > 0 and pageParts[0] in nonEnglishLangs:
		# Seems that a non-English page was requested that does
		# not exist, look if the English page exists. If so, show it.
	
		lang = pageParts[0]
	
		# pageParts[0] = 'en'
		del pageParts[0]
		
		# Bogus page request?
		if pageParts[0] in nonEnglishLangs:
		    page.send_page(request)
		    return

		tryPage = Page(request, '/'.join(pageParts))
		if tryPage.exists():
			if unknownPageMessages.has_key(lang):
				msg = unknownPageMessages[lang]
			else:
				msg = 'Currently, there is no translation available for this page, ' + \
					'the English page is shown instead!'
			tryPage.send_page(request, msg = msg)
			return

	# The page does not exist, and an English page is also absent.
	page.send_page(request)