if value:

            if value.get('password'):

                try:

                    value['password'] = get_crypt_password(value['password'])

                except UnicodeEncodeError:

                    e_dict = {'password':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            if value.get('password_confirmation'):

                try:

                    value['password_confirmation'] = \

                        get_crypt_password(value['password_confirmation'])

                except UnicodeEncodeError:

                    e_dict = {'password_confirmation':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            if value.get('new_password'):

                try:

                    value['new_password'] = \

                        get_crypt_password(value['new_password'])

                except UnicodeEncodeError:

                    e_dict = {'new_password':_('Invalid characters in password')}

                    raise formencode.Invalid('', value, state, error_dict=e_dict)

            return value

class ValidPasswordsMatch(formencode.validators.FancyValidator):

    def validate_python(self, value, state):

        if value['password'] != value['password_confirmation']:

            e_dict = {'password_confirmation':

                   _('Password do not match')}

            raise formencode.Invalid('', value, state, error_dict=e_dict)

class ValidAuth(formencode.validators.FancyValidator):

    messages = {

            'invalid_password':_('invalid password'),

            'invalid_login':_('invalid user name'),

            'disabled_account':_('Your account is disabled')

            }

    #error mapping

    e_dict = {'username':messages['invalid_login'],

              'password':messages['invalid_password']}

    e_dict_disable = {'username':messages['disabled_account']}

    def validate_python(self, value, state):

        password = value['password']

        username = value['username']

        user = UserModel().get_by_username(username)

        if authenticate(username, password):

            return value

        else:

            if user and user.active is False:

                log.warning('user %s is disabled', username)

                raise formencode.Invalid(self.message('disabled_account',

                                         state=State_obj),

                                         value, state,

                                         error_dict=self.e_dict_disable)

            else:

                log.warning('user %s not authenticated', username)

                raise formencode.Invalid(self.message('invalid_password',

                                         state=State_obj), value, state,

                                         error_dict=self.e_dict)

class ValidRepoUser(formencode.validators.FancyValidator):

    def to_python(self, value, state):

        sa = meta.Session()

        try:

            self.user_db = sa.query(User)\

                .filter(User.active == True)\

                .filter(User.username == value).one()

        except Exception:

            raise formencode.Invalid(_('This username is not valid'),

                                     value, state)

        finally:

            meta.Session.remove()

        return value

def ValidRepoName(edit, old_data):

    class _ValidRepoName(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            repo_name = value.get('repo_name')

            slug = repo_name_slug(repo_name)

            if slug in ['_admin', '']:

                e_dict = {'repo_name': _('This repository name is disallowed')}

                raise formencode.Invalid('', value, state, error_dict=e_dict)

            # value needs to be aware of group name

            value['repo_name_full'] = repo_name_full

            if old_data.get('repo_name') != repo_name_full or not edit:

                    if RepoModel().get_by_repo_name(repo_name_full,):

                        e_dict = {'repo_name':_('This repository already '

                                                'exists in group "%s"') %

                                  gr.group_name}

                        raise formencode.Invalid('', value, state,

                                                 error_dict=e_dict)

                else:

                    if RepoModel().get_by_repo_name(repo_name_full):

                        raise formencode.Invalid('', value, state,

                                                 error_dict=e_dict)

            return value

    return _ValidRepoName

def SlugifyRepo():

    class _SlugifyRepo(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            return repo_name_slug(value)

    return _SlugifyRepo

def ValidCloneUri():

    from mercurial.httprepo import httprepository, httpsrepository

    from rhodecode.lib.utils import make_ui

    class _ValidCloneUri(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            if not value:

                pass

            elif value.startswith('https'):

                try:

                    httpsrepository(make_ui('db'), value).capabilities

                except Exception, e:

                    log.error(traceback.format_exc())

                    raise formencode.Invalid(_('invalid clone url'), value,

                                             state)

            elif value.startswith('http'):

                try:

                    httprepository(make_ui('db'), value).capabilities

                except Exception, e:

                    log.error(traceback.format_exc())

                    raise formencode.Invalid(_('invalid clone url'), value,

                                             state)

            else:

                raise formencode.Invalid(_('Invalid clone url, provide a '

                                           'valid clone http\s url'), value,

                                         state)

            return value

    return _ValidCloneUri

def ValidForkType(old_data):

    class _ValidForkType(formencode.validators.FancyValidator):

        def to_python(self, value, state):

            if old_data['repo_type'] != value:

                raise formencode.Invalid(_('Fork have to be the same '

                                           'type as original'), value, state)

            return value

    return _ValidForkType

class ValidPerms(formencode.validators.FancyValidator):

    messages = {'perm_new_member_name':_('This username or users group name'

                                         ' is not valid')}

    def to_python(self, value, state):

        perms_update = []

        perms_new = []

        #build a list of permission to update and new permission to create

        for k, v in value.items():

            #means new added member to permissions

            if k.startswith('perm_new_member'):

                new_perm = value.get('perm_new_member', False)

                new_member = value.get('perm_new_member_name', False)

                new_type = value.get('perm_new_member_type')

                if new_member and new_perm:

                    if (new_member, new_perm, new_type) not in perms_new:

                        perms_new.append((new_member, new_perm, new_type))

            elif k.startswith('u_perm_') or k.startswith('g_perm_'):

                member = k[7:]

                t = {'u':'user',

                     'g':'users_group'}[k[0]]

                if member == 'default':

                    if value['private']:

                        #set none for default when updating to private repo

                        v = 'repository.none'

                perms_update.append((member, v, t))

        value['perms_updates'] = perms_update

        value['perms_new'] = perms_new

        #update permissions

        sa = meta.Session

        for k, v, t in perms_new:

            try:

                if t is 'user':

                    self.user_db = sa.query(User)\

                        .filter(User.active == True)\

                        .filter(User.username == k).one()

                if t is 'users_group':