## Script (Python) "setI18NContentCookie"
##title=
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=lang,here_url=None,layer_url=None,available_languages=None,cookie=0

if not here_url: here_url=context.absolute_url()
if not layer_url: layer_url=context.retrieveI18NContentLayerURL()
if not available_languages: available_languages=context.retrieveFilteredLanguages().keys()

REQUEST=context.REQUEST
if cookie:
    REQUEST.RESPONSE.setCookie('I18N_CONTENT_LANGUAGE',lang, path='/')
elif REQUEST.cookies.get('I18N_CONTENT_LANGUAGE',None):
    REQUEST.RESPONSE.expireCookie('I18N_CONTENT_LANGUAGE', path='/')

redirect=layer_url

try: referrer=REQUEST.environ['HTTP_REFERER']
except: referrer=here_url

print "lang", lang
print "layer_url", layer_url
print "referrer", referrer[:len(layer_url)]

if referrer[:len(layer_url)] == layer_url:
    try: rest=referrer[len(layer_url):]
    except: rest=None
    print "r1", rest
    if rest and rest not in ('/','/index_html','/view'):
        rest=rest.split('/')
        print "rest", rest
        print "langs", available_languages
        if len(rest) > 1:
            rs = rest[1].split('?')
            if len(rs) > 1: q=rs[1]
            else: q=None
            r=rs[0]
            print "r, q", r,q
            if r in available_languages and lang in available_languages:
                if hasattr(context, lang):
                    if context.portal_membership.checkPermission('View', getattr(context, lang)):
                        r=lang
                    else:
                        r=None
                else:
                    r=None
            elif r == 'i18nlayer_languages_form':
                r=None
            else:
                #rest=[]
                r=None
            if not r:
                if q: rest.insert(2,'?'.join(('view',q)))
                else: rest.insert(2,'view')
                rest=rest[:3]
            if q and r and len(rest)>1: rest[1]='?'.join((r, q))
            elif r and len(rest)>1: rest[1]=r
            elif not r and len(rest)>1: del rest[1]
        redirect=layer_url+'/'.join(rest)

query={}
# parse current query
s = redirect.find('?')
if s >= 0:
    q = redirect[s+1:]
    redirect=redirect[:s]
    for e in q.split("&"):
        if e:
            k,v = e.split("=")
            query[k]=v

print "query", query

if lang:
    # no cookie support
    query['cl']=lang

qst="?"
for k, v in query.items():
    qst=qst+"%s=%s&" % (k, v)

redirect=redirect+qst[:-1]
print "redirect", redirect
REQUEST.RESPONSE.redirect(redirect)