import re, os
from urllib import quote_plus, unquote_plus


groupnamepat = re.compile(r"^g\.(\w+)\$")
def splitpadname (padid):
    m = groupnamepat.match(padid)
    if m:
        return(m.group(1), padid[m.end():])
    else:
        return (u"", padid)

def padpath (padid, pub_path=u"", group_path=u""):
    g, p = splitpadname(padid)
    if type(g) == unicode:
        g = g.encode("utf-8")
    if type(p) == unicode:
        p = p.encode("utf-8")
    p = quote_plus(p)
    # p = p.replace(" ", "_")
    # p = p.replace("*", "-")
    if g:
        return os.path.join(group_path, g, p)
    else:
        return os.path.join(pub_path, p)