Package Products :: Package ZenUtils :: Module Ext |
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# Source Code for Module Products.ZenUtils.Ext

     1  ###########################################################################
     2  #
     3  # This program is part of Zenoss Core, an open source monitoring platform.
     4  # Copyright (C) 2007, Zenoss Inc.
     5  #
     6  # This program is free software; you can redistribute it and/or modify it
     7  # under the terms of the GNU General Public License version 2 as published by
     8  # the Free Software Foundation.
     9  #
    10  # For complete information please visit: http://www.zenoss.com/oss/
    11  #
    12  ###########################################################################
    13
    14  # Functions to simplify form submission return values.
    15
    16  import transaction
    17
    18  from Products.ZenUtils.jsonutils import json, unjson
    19  from Products.ZenUtils.extdirect.zope.router import ZopeDirectRouter
    20  from Products.ZenUtils.extdirect.router import DirectResponse
    21
    22 -class FormResponse(object):
    23      """
    24      Builds a response for an Ext form.
    25      """
    26      _errors = None
    27      _redirect = None
    28
    29 -    def has_errors(self):
    30          return bool(self._errors)
    31
    32 -    def redirect(self, url):
    33          self._redirect = url
    34
    35 -    def error(self, field_name, error_text):
    36          if self._errors is None:
    37              self._errors = {}
    38          self._errors[field_name] = error_text
    39
    40      @json
    41 -    def get_response(self):
    42          return {
    43              'success':  not self.has_errors(),
    44              'redirect': self._redirect,
    45              'errors':   self._errors or {}
    46          }
    47
    48
    49 -def form_action(f):
    50      """
    51      Decorator for methods that are the targets of Ext form submission.
    52
    53      Provides transaction rollback, so methods can be used as their own
    54      validation without harm.
    55      """
    56      def inner(*args, **kwargs):
    57          savepoint = transaction.savepoint()
    58          result = f(*args, **kwargs)
    59          if isinstance(result, FormResponse):
    60              if result.has_errors():
    61                  savepoint.rollback()
    62              return result.get_response()
    63          return result
    64      return inner
    65
    66
    67 -class DirectRouter(ZopeDirectRouter):
    68      _asof = None
    69
    70 -    def _set_asof(self, asof):
    71          self._asof = asof
    72
    73 -    def __call__(self):
    74          result = unjson(super(DirectRouter, self).__call__())
    75          return json(result)
    76