## $Id: utils.py 7831 2012-03-09 22:56:51Z henrik $
##
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
"""General helper utilities for Kofa.
"""
import os
import grok
import string
from zope.i18n import translate
from zope.interface import implements
from random import SystemRandom as r
from waeup.kofa.interfaces import IKofaUtils
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.smtp import send_mail as send_mail_internally

def send_mail(from_name,from_addr,rcpt_name,rcpt_addr,subject,body,config):
    """Wrapper for the real SMTP functionality in :mod:`waeup.kofa.smtp`.

    Merely here to stay compatible with lots of calls to this place.
    """
    mail_id = send_mail_internally(
        from_name, from_addr, rcpt_name, rcpt_addr,
        subject, body, config)
    return True

class KofaUtils(grok.GlobalUtility):
    """A collection of parameters and methods subject to customization.

    """
    grok.implements(IKofaUtils)
    # This the only place where we define the portal language
    # which is used for the translation of system messages
    # (e.g. object histories).
    PORTAL_LANGUAGE = 'en'

    PREFERRED_LANGUAGES_DICT = {
        'en':(1, u'English'),
        'fr':(2, u'Français'),
        'de':(3, u'Deutsch'),
        'ha':(4, u'Hausa'),
        'yo':(5, u'Yoruba'),
        'ig':(6, u'Igbo'),
        }

    def getInstTypeDict(self):
        """Provide a dictionary of study modes.
        """
        return {
        'faculty': 'Faculty of',
        'department': 'Department of',
        'school': 'School of',
        'office': 'Office for',
        'centre': 'Centre for',
        'institute': 'Institute of',
        'school_for': 'School for',
        }

    def getStudyModesDict(self):
        """Provide a dictionary of study modes.
        """
        return {
        'rmd_ft': 'Remedial with deficiencies',
        'dp_pt': 'Diploma Part Time',
        'ct_ft': 'Certificate Full Time',
        'dp_ft': 'Diploma Full Time',
        'de_pt': 'Direct Entry Part Time',
        'pg_ft': 'Postgraduate Full Time',
        'pg_pt': 'Postgraduate Part Time',
        'jm_ft': 'Joint Matriculation Full Time',
        'ume_ft': 'UME Full Time',
        'de_ft': 'Direct Entry Full Time',
        'ph_ft': 'Post Higher Education Full Time',
        'transfer_pt': 'Transfer Part Time',
        'ug_pt': 'Undergraduate Part Time',
        'transfer_ft': 'Transfer Full Time',
        'ct_pt': 'Certificate Part Time',
        'ug_ft': 'Undergraduate Full Time',
        'rm_ft': 'Remedial'
        }

    def getAppCatDict(self):
        """Provide a dictionary of study modes.
        """
        return {
        'basic': 'PUME, PDE, PCE, PRENCE',
        'no': 'no application',
        'pg': 'Postgraduate',
        'sandwich': 'Sandwich',
        'cest': 'Part-Time, Diploma, Certificate'
        }

    def getSemesterDict(self):
        """Provide a dictionary of semester or trimester types.
        """
        return {
        1: 'First Semester',
        2: 'Second Semester',
        3: 'Combined',
        9: 'N/A'
        }

    def sendContactForm(self,from_name,from_addr,rcpt_name,rcpt_addr,
                from_username,usertype,portal,body,subject):
        """Send an email with data provided by forms.
        """
        config = grok.getSite()['configuration']
        text = _(u"""Fullname: ${a}
User Id: ${b}
User Type: ${c}
Portal: ${d}

${e}
""")
        text = _(text,
            mapping = {
            'a':from_name,
            'b':from_username,
            'c':usertype,
            'd':portal,
            'e':body})
        body = translate(text, 'waeup.kofa',
            target_language=self.PORTAL_LANGUAGE)
        return send_mail(
            from_name,from_addr,rcpt_name,rcpt_addr,subject,body,config)

    def fullname(self,firstname,lastname,middlename=None):
        """Full name constructor.
        """
        # We do not necessarily have the middlename attribute
        if middlename:
            return string.capwords(
                '%s %s %s' % (firstname, middlename, lastname))
        else:
            return string.capwords(
                '%s %s' % (firstname, lastname))

    def genPassword(self, length=8, chars=string.letters + string.digits):
        """Generate a random password.
        """
        return ''.join([r().choice(chars) for i in range(length)])


    def sendCredentials(self, user, password=None, login_url=None, msg=None):
        """Send credentials as email.

        Input is the applicant for which credentials are sent and the
        password.

        Returns True or False to indicate successful operation.
        """
        subject = 'Your Kofa credentials'
        text = _(u"""Dear ${a},

${b}
Student Registration and Information Portal of
${c}.

Your user name: ${d}
Your password: ${e}
Login page: ${f}

Please remember your user name and keep
your password secret!

Please also note that passwords are case-sensitive.

Regards
""")
        config = grok.getSite()['configuration']
        from_name = config.name_admin
        from_addr = config.email_admin
        rcpt_name = user.title
        rcpt_addr = user.email
        text = _(text,
            mapping = {
            'a':rcpt_name,
            'b':msg,
            'c':config.name,
            'd':user.name,
            'e':password,
            'f':login_url})

        body = translate(text, 'waeup.kofa',
            target_language=self.PORTAL_LANGUAGE)
        return send_mail(
            from_name,from_addr,rcpt_name,rcpt_addr,subject,body,config)