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""" this is forms validation classes
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http://formencode.org/module-formencode.validators.html
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for list off all availible validators
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we can create our own validators
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The table below outlines the options which can be used in a schema in addition to the validators themselves
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pre_validators [] These validators will be applied before the schema
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chained_validators [] These validators will be applied after the schema
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allow_extra_fields False If True, then it is not an error when keys that aren't associated with a validator are present
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filter_extra_fields False If True, then keys that aren't associated with a validator are removed
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if_key_missing NoDefault If this is given, then any keys that aren't available but are expected will be replaced with this value (and then validated). This does not override a present .if_missing attribute on validators. NoDefault is a special FormEncode class to mean that no default values has been specified and therefore missing keys shouldn't take a default value.
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ignore_key_missing False If True, then missing keys will be missing in the result, if the validator doesn't have .if_missing on it already
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<name> = formencode.validators.<name of validator>
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<name> must equal form name
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list=[1,2,3,4,5]
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for SELECT use formencode.All(OneOf(list), Int())
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"""
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from formencode import All
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from formencode.validators import UnicodeString, OneOf, Int, Number, Regex, \
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Email, Bool, StringBoolean
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from pylons import session
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from pylons.i18n.translation import _
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from pylons_app.lib.auth import get_crypt_password
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import pylons_app.lib.helpers as h
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from pylons_app.model import meta
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from pylons_app.model.db import User, Repository
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from sqlalchemy.exc import OperationalError
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from sqlalchemy.orm.exc import NoResultFound, MultipleResultsFound
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from webhelpers.pylonslib.secure_form import authentication_token
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import datetime
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import formencode
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import logging
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log = logging.getLogger(__name__)
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#this is needed to translate the messages using _() in validators
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class State_obj(object):
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_ = staticmethod(_)
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#===============================================================================
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# VALIDATORS
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#===============================================================================
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class ValidAuthToken(formencode.validators.FancyValidator):
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messages = {'invalid_token':_('Token mismatch')}
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def validate_python(self, value, state):
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if value != authentication_token():
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raise formencode.Invalid(self.message('invalid_token', state,
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search_number=value), value, state)
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class ValidUsername(formencode.validators.FancyValidator):
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def validate_python(self, value, state):
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pass
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class ValidPassword(formencode.validators.FancyValidator):
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def to_python(self, value, state):
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return get_crypt_password(value)
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class ValidAuth(formencode.validators.FancyValidator):
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messages = {
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'invalid_password':_('invalid password'),
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'invalid_login':_('invalid user name'),
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'disabled_account':_('Your acccount is disabled')
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}
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#error mapping
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e_dict = {'username':messages['invalid_login'],
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'password':messages['invalid_password']}
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e_dict_disable = {'username':messages['disabled_account']}
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def validate_python(self, value, state):
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sa = meta.Session
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crypted_passwd = get_crypt_password(value['password'])
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username = value['username']
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try:
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user = sa.query(User).filter(User.username == username).one()
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except (NoResultFound, MultipleResultsFound, OperationalError) as e:
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log.error(e)
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user = None
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raise formencode.Invalid(self.message('invalid_password',
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state=State_obj), value, state,
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error_dict=self.e_dict)
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if user:
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if user.active:
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if user.username == username and user.password == crypted_passwd:
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from pylons_app.lib.auth import AuthUser
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auth_user = AuthUser()
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auth_user.username = username
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auth_user.is_authenticated = True
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auth_user.is_admin = user.admin
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auth_user.user_id = user.user_id
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session['hg_app_user'] = auth_user
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session.save()
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log.info('user %s is now authenticated', username)
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try:
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user.last_login = datetime.datetime.now()
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sa.add(user)
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sa.commit()
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except (OperationalError) as e:
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log.error(e)
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sa.rollback()
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return value
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else:
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log.warning('user %s not authenticated', username)
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raise formencode.Invalid(self.message('invalid_password',
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state=State_obj), value, state,
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error_dict=self.e_dict)
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else:
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log.warning('user %s is disabled', username)
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raise formencode.Invalid(self.message('disabled_account',
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state=State_obj),
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value, state,
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error_dict=self.e_dict_disable)
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class ValidRepoUser(formencode.validators.FancyValidator):
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def to_python(self, value, state):
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sa = meta.Session
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try:
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self.user_db = sa.query(User).filter(User.username == value).one()
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except Exception:
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raise formencode.Invalid(_('This username is not valid'),
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value, state)
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return self.user_db.user_id
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def ValidRepoName(edit=False):
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class _ValidRepoName(formencode.validators.FancyValidator):
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def to_python(self, value, state):
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slug = h.repo_name_slug(value)
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sa = meta.Session
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if sa.query(Repository).get(slug) and not edit:
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raise formencode.Invalid(_('This repository already exists'),
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value, state)
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return slug
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return _ValidRepoName
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#===============================================================================
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# FORMS
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#===============================================================================
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class LoginForm(formencode.Schema):
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allow_extra_fields = True
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filter_extra_fields = True
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username = UnicodeString(
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strip=True,
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min=3,
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not_empty=True,
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messages={
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'empty':_('Please enter a login'),
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'tooShort':_('Enter a value %(min)i characters long or more')}
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)
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password = UnicodeString(
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strip=True,
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min=3,
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not_empty=True,
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messages={
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'empty':_('Please enter a password'),
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'tooShort':_('Enter a value %(min)i characters long or more')}
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)
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#chained validators have access to all data
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chained_validators = [ValidAuth]
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def UserForm(edit=False):
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class _UserForm(formencode.Schema):
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allow_extra_fields = True
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filter_extra_fields = True
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username = All(UnicodeString(strip=True, min=3, not_empty=True), ValidUsername)
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if edit:
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new_password = All(UnicodeString(strip=True, min=3, not_empty=False), ValidPassword)
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else:
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password = All(UnicodeString(strip=True, min=3, not_empty=False), ValidPassword)
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active = StringBoolean(if_missing=False)
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name = UnicodeString(strip=True, min=3, not_empty=True)
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lastname = UnicodeString(strip=True, min=3, not_empty=True)
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email = Email(not_empty=True)
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return _UserForm
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def RepoForm(edit=False):
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class _RepoForm(formencode.Schema):
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allow_extra_fields = True
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filter_extra_fields = True
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repo_name = All(UnicodeString(strip=True, min=1, not_empty=True), ValidRepoName(edit))
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description = UnicodeString(strip=True, min=3, not_empty=True)
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private = StringBoolean(if_missing=False)
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if edit:
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user = All(Int(not_empty=True), ValidRepoUser)
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return _RepoForm
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