Added a mod_python-style form-data application decorator.

[wrw.git] / wrw / util.py

diff --git a/wrw/util.py b/wrw/util.py
index b757e14..7a29ea8 100644 (file)
--- a/wrw/util.py
+++ b/wrw/util.py
@@ -1,10 +1,24 @@
-from . import req, dispatch, session
+import inspect
+import req, dispatch, session, form
 
 def wsgiwrap(callable):
     def wrapper(env, startreq):
         return dispatch.handle(req.origrequest(env), startreq, callable)
     return wrapper
 
+def formparams(callable):
+    def wrapper(req):
+        data = form.formdata(req)
+        spec = inspect.getargspec(callable)
+        args = dict(data.items())
+        args["req"] = req
+        if not spec.keywords:
+            for arg in list(args):
+                if arg not in spec.args:
+                    del args[arg]
+        return callable(**args)
+    return wrapper
+
 def persession(data = None):
     def dec(callable):
         def wrapper(req):
@@ -19,3 +33,57 @@ def persession(data = None):
             return sess[callable].handle(req)
         return wrapper
     return dec
+
+class sessiondata(object):
+    @classmethod
+    def get(cls, req):
+        sess = cls.sessdb().get(req)
+        with sess.lock:
+            try:
+                return sess[cls]
+            except KeyError:
+                ret = cls(req)
+                sess[cls] = ret
+                return ret
+
+    @classmethod
+    def sessdb(cls):
+        return session.default
+
+class autodirty(sessiondata):
+    @classmethod
+    def get(cls, req):
+        ret = super(autodirty, cls).get(req)
+        if "_is_dirty" not in ret.__dict__:
+            ret.__dict__["_is_dirty"] = False
+        return ret
+
+    def sessfrozen(self):
+        self.__dict__["_is_dirty"] = False
+
+    def sessdirty(self):
+        return self._is_dirty
+
+    def __setattr__(self, name, value):
+        super(autodirty, self).__setattr__(name, value)
+        if "_is_dirty" in self.__dict__:
+            self.__dict__["_is_dirty"] = True
+
+    def __delattr__(self, name):
+        super(autodirty, self).__delattr__(name, value)
+        if "_is_dirty" in self.__dict__:
+            self.__dict__["_is_dirty"] = True
+
+class manudirty(object):
+    def __init__(self, *args, **kwargs):
+        super(manudirty, self).__init__(*args, **kwargs)
+        self.__dirty = False
+
+    def sessfrozen(self):
+        self.__dirty = False
+
+    def sessdirty(self):
+        return self.__dirty
+
+    def dirty(self):
+        self.__dirty = True