"""GNUViech administration tool helper classes.

(c) 2004 Jan Dittberner <jan@gnuviech.info>
"""

import os

class GNVPrefs:
    """This class has static variables for the settings of the GNUViech
    administration tool. These settings can be customized in the file
    gvadm.preferences."""
    # define standard values
    PWDMINLENGTH = 6
    PWDMAXLENGTH = 12
    PWDCHARS = range(ord('a'), ord('z'))
    PWDCHARS.extend(range(ord('A'), ord('Z')))
    PWDCHARS.extend(range(ord('0'), ord('9')))
    PWDCHARS.extend((ord('@'), ord('#'), ord(','), ord('.'), ord('*'),
                     ord('+'), ord('-'), ord('='), ord('!'), ord('$'),
                     ord('"')))
    USERPREFIX    = "usr"
    BASEPREFIX    = ""
    GVADMDIR      = BASEPREFIX+"/etc/gvadm/"
    EXIMCONFDIR   = BASEPREFIX+"/etc/exim/"
    VIRTUALDOMDIR = EXIMCONFDIR+"virtual/"
    HOMEDIR       = BASEPREFIX+"/home"
    POPHOMEDIR    = HOMEDIR+"/mail/"
    WEBHOMEDIR    = HOMEDIR+"/www/"
    WEBLOGDIR     = WEBHOMEDIR+"logs/"
    WEBSTATSDIR   = WEBHOMEDIR+"stats/"
    # load custom settings
    execfile("gvadm.preferences")

    def __repr__(self):
        items = dir(self)
        items.sort()
        return "gnuviech.GNVPrefs\n\t" + "\n\t".join(["%s = %s" %
                                                      (item, getattr(self, item)) for item in items if getattr(self, item).__class__ in (str, int, list, dict)]) + "\n"
    
class NoAdmDirError(Exception):
    """This exception is raised if the admin directory does'nt exist."""
    pass

def setupDirs():
    """Setup the directories and files required for proper operation of the
    GNUViech administration tool."""
    for directory in (GNVPrefs.BASEPREFIX,
                      GNVPrefs.BASEPREFIX+"/etc",
                      GNVPrefs.GVADMDIR,
                      GNVPrefs.EXIMCONFDIR,
                      GNVPrefs.VIRTUALDOMDIR,
                      GNVPrefs.HOMEDIR,
                      GNVPrefs.POPHOMEDIR,
                      GNVPrefs.WEBHOMEDIR,
                      GNVPrefs.WEBLOGDIR,
                      GNVPrefs.WEBSTATSDIR):
        if (not os.access(directory, os.R_OK & os.X_OK)):
            print "making %s." % directory
            os.mkdir(directory)
    for required in (GNVPrefs.BASEPREFIX+"/etc/passwd",
                     GNVPrefs.BASEPREFIX+"/etc/shadow",
                     GNVPrefs.EXIMCONFDIR+"eximpasswords"):
        if (not os.access(required, os.R_OK)):
            print "creating %s." % required
            file = open(required, "w")
            file.close()