wrw/util.py

   1 import inspect
   2 import req, dispatch, session, form
   3
   4 def wsgiwrap(callable):
   5     def wrapper(env, startreq):
   6         return dispatch.handle(req.origrequest(env), startreq, callable)
   7     return wrapper
   8
   9 def formparams(callable):
  10     def wrapper(req):
  11         data = form.formdata(req)
  12         spec = inspect.getargspec(callable)
  13         args = dict(data.items())
  14         args["req"] = req
  15         if not spec.keywords:
  16             for arg in list(args):
  17                 if arg not in spec.args:
  18                     del args[arg]
  19         return callable(**args)
  20     return wrapper
  21
  22 def persession(data = None):
  23     def dec(callable):
  24         def wrapper(req):
  25             sess = session.get(req)
  26             if callable not in sess:
  27                 if data is None:
  28                     sess[callable] = callable()
  29                 else:
  30                     if data not in sess:
  31                         sess[data] = data()
  32                     sess[callable] = callable(data)
  33             return sess[callable].handle(req)
  34         return wrapper
  35     return dec
  36
  37 class sessiondata(object):
  38     @classmethod
  39     def get(cls, req, create = True):
  40         sess = cls.sessdb().get(req)
  41         with sess.lock:
  42             try:
  43                 return sess[cls]
  44             except KeyError:
  45                 if not create:
  46                     return None
  47                 ret = cls(req, sess)
  48                 sess[cls] = ret
  49                 return ret
  50
  51     @classmethod
  52     def sessdb(cls):
  53         return session.default.val
  54
  55 class autodirty(sessiondata):
  56     @classmethod
  57     def get(cls, req):
  58         ret = super(autodirty, cls).get(req)
  59         if "_is_dirty" not in ret.__dict__:
  60             ret.__dict__["_is_dirty"] = False
  61         return ret
  62
  63     def sessfrozen(self):
  64         self.__dict__["_is_dirty"] = False
  65
  66     def sessdirty(self):
  67         return self._is_dirty
  68
  69     def __setattr__(self, name, value):
  70         super(autodirty, self).__setattr__(name, value)
  71         if "_is_dirty" in self.__dict__:
  72             self.__dict__["_is_dirty"] = True
  73
  74     def __delattr__(self, name):
  75         super(autodirty, self).__delattr__(name, value)
  76         if "_is_dirty" in self.__dict__:
  77             self.__dict__["_is_dirty"] = True
  78
  79 class manudirty(object):
  80     def __init__(self, *args, **kwargs):
  81         super(manudirty, self).__init__(*args, **kwargs)
  82         self.__dirty = False
  83
  84     def sessfrozen(self):
  85         self.__dirty = False
  86
  87     def sessdirty(self):
  88         return self.__dirty
  89
  90     def dirty(self):
  91         self.__dirty = True