Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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from urlparse import urljoin

from django import forms

from django.utils.translation import ugettext as _

from django.contrib.auth.forms import UserCreationForm, AuthenticationForm, PasswordResetForm

from django.core.mail import send_mail

from django.contrib.auth.tokens import default_token_generator

from django.template import Context, loader

from django.utils.http import int_to_base36

from django.core.urlresolvers import reverse

from astakos.im.models import AstakosUser

from astakos.im.settings import INVITATIONS_PER_LEVEL, DEFAULT_FROM_EMAIL, BASEURL, SITENAME, RECAPTCHA_PRIVATE_KEY

from astakos.im.widgets import DummyWidget, RecaptchaWidget

import logging

import recaptcha.client.captcha as captcha

logger = logging.getLogger(__name__)

class LocalUserCreationForm(UserCreationForm):

    """

    Extends the built in UserCreationForm in several ways:

    * Adds email, first_name and last_name field.

    * The username field isn't visible and it is assigned a generated id.

    * User created is not active. 

    """

    recaptcha_challenge_field = forms.CharField(widget=DummyWidget)

    recaptcha_response_field = forms.CharField(widget=RecaptchaWidget, label='')

    class Meta:

        model = AstakosUser

        fields = ("email", "first_name", "last_name")

    def __init__(self, *args, **kwargs):

        """

        Changes the order of fields, and removes the username field.

        """

        if 'ip' in kwargs:

            self.ip = kwargs['ip']

            kwargs.pop('ip')

        super(LocalUserCreationForm, self).__init__(*args, **kwargs)

        self.fields.keyOrder = ['email', 'first_name', 'last_name',

                                'password1', 'password2',

                                'recaptcha_challenge_field',

                                'recaptcha_response_field']

    def clean_email(self):

        email = self.cleaned_data['email']

        if not email:

            raise forms.ValidationError(_("This field is required"))

        try:

            AstakosUser.objects.get(email = email)

            raise forms.ValidationError(_("Email is reserved"))

        except AstakosUser.DoesNotExist:

            return email

    def clean_recaptcha_response_field(self):

        if 'recaptcha_challenge_field' in self.cleaned_data:

            self.validate_captcha()

        return self.cleaned_data['recaptcha_response_field']

    def clean_recaptcha_challenge_field(self):

        if 'recaptcha_response_field' in self.cleaned_data:

            self.validate_captcha()

        return self.cleaned_data['recaptcha_challenge_field']

    def validate_captcha(self):

        rcf = self.cleaned_data['recaptcha_challenge_field']

        rrf = self.cleaned_data['recaptcha_response_field']

        check = captcha.submit(rcf, rrf, RECAPTCHA_PRIVATE_KEY, self.ip)

        if not check.is_valid:

            raise forms.ValidationError(_('You have not entered the correct words'))

    def save(self, commit=True):

        """

        Saves the email, first_name and last_name properties, after the normal

        save behavior is complete.

        """

        user = super(LocalUserCreationForm, self).save(commit=False)

        user.renew_token()

        if commit:

            user.save()

        logger.info('Created user %s', user)

        return user

class InvitedLocalUserCreationForm(LocalUserCreationForm):

    """

    Extends the LocalUserCreationForm: adds an inviter readonly field.

    """

    inviter = forms.CharField(widget=forms.TextInput(), label=_('Inviter Real Name'))

    class Meta:

        model = AstakosUser

        fields = ("email", "first_name", "last_name")

    def __init__(self, *args, **kwargs):

        """

        Changes the order of fields, and removes the username field.

        """

        super(InvitedLocalUserCreationForm, self).__init__(*args, **kwargs)

        self.fields.keyOrder = ['email', 'inviter', 'first_name',

                                'last_name', 'password1', 'password2']

        #set readonly form fields

        self.fields['inviter'].widget.attrs['readonly'] = True

        self.fields['email'].widget.attrs['readonly'] = True

        self.fields['username'].widget.attrs['readonly'] = True

    def save(self, commit=True):

        user = super(InvitedLocalUserCreationForm, self).save(commit=False)

        level = user.invitation.inviter.level + 1

        user.level = level

        user.invitations = INVITATIONS_PER_LEVEL[level]

        if commit:

            user.save()

        return user

class LoginForm(AuthenticationForm):

    username = forms.EmailField(label=_("Email"))

class ProfileForm(forms.ModelForm):

    """

    Subclass of ``ModelForm`` for permiting user to edit his/her profile.

    Most of the fields are readonly since the user is not allowed to change them.

    The class defines a save method which sets ``is_verified`` to True so as the user

    during the next login will not to be redirected to profile page.

    """

    renew = forms.BooleanField(label='Renew token', required=False)

    class Meta:

        model = AstakosUser

        fields = ('email', 'first_name', 'last_name', 'auth_token', 'auth_token_expires')

    def __init__(self, *args, **kwargs):

        super(ProfileForm, self).__init__(*args, **kwargs)

        instance = getattr(self, 'instance', None)

        ro_fields = ('auth_token', 'auth_token_expires', 'email')

        if instance and instance.id:

            for field in ro_fields:

                self.fields[field].widget.attrs['readonly'] = True

    def save(self, commit=True):

        user = super(ProfileForm, self).save(commit=False)

        user.is_verified = True

        if self.cleaned_data.get('renew'):

            user.renew_token()

        if commit:

            user.save()

        return user

class ThirdPartyUserCreationForm(ProfileForm):

    class Meta:

        model = AstakosUser

        fields = ('email', 'last_name', 'first_name', 'affiliation', 'provider', 'third_party_identifier')

    def __init__(self, *args, **kwargs):

        if 'ip' in kwargs:

            self.ip = kwargs['ip']

            kwargs.pop('ip')

        super(ThirdPartyUserCreationForm, self).__init__(*args, **kwargs)

        self.fields.keyOrder = ['email']

    def clean_email(self):

        email = self.cleaned_data['email']

        if not email:

            raise forms.ValidationError(_("This field is required"))

        try:

            user = AstakosUser.objects.get(email = email)

            raise forms.ValidationError(_("Email is reserved"))

        except AstakosUser.DoesNotExist:

            return email

    def save(self, commit=True):

        user = super(ThirdPartyUserCreationForm, self).save(commit=False)

        user.verified = False

        user.renew_token()

        if commit:

            user.save()

        logger.info('Created user %s', user)

        return user

class InvitedThirdPartyUserCreationForm(ThirdPartyUserCreationForm):

    def __init__(self, *args, **kwargs):

        super(InvitedThirdPartyUserCreationForm, self).__init__(*args, **kwargs)

        #set readonly form fields

        self.fields['email'].widget.attrs['readonly'] = True

class FeedbackForm(forms.Form):

    """

    Form for writing feedback.

    """

    feedback_msg = forms.CharField(widget=forms.Textarea(),

                                label=u'Message', required=False)

    feedback_data = forms.CharField(widget=forms.HiddenInput(),

                                label='', required=False)

class SendInvitationForm(forms.Form):

    """

    Form for sending an invitations

    """

    email = forms.EmailField(required = True, label = 'Email address')

    first_name = forms.EmailField(label = 'First name')

    last_name = forms.EmailField(label = 'Last name')

class ExtendedPasswordResetForm(PasswordResetForm):

    """

    Extends PasswordResetForm by overriding save method:

    passes a custom from_email in send_mail.

    Since Django 1.3 this is useless since ``django.contrib.auth.views.reset_password``

    accepts a from_email argument.

    """

    def save(self, domain_override=None, email_template_name='registration/password_reset_email.html',

             use_https=False, token_generator=default_token_generator, request=None):

        """

        Generates a one-use only link for resetting password and sends to the user.

        """

        for user in self.users_cache:

            url = urljoin(BASEURL,

                          '/im/local/reset/confirm/%s-%s' %(int_to_base36(user.id),

                                                            token_generator.make_token(user)))

            t = loader.get_template(email_template_name)

            c = {

                'email': user.email,

                'url': url,

                'site_name': SITENAME,

                'user': user,

                'baseurl': BASEURL

            }

            from_email = DEFAULT_FROM_EMAIL

            send_mail(_("Password reset on %s") % SITENAME,

                t.render(Context(c)), from_email, [user.email])