provide registry for views, use for default view

scopes/server/app.py

@@ -1,14 +1,14 @@
 # scopes.server.app
 
 import json
-from zope.interface import implementer
 from zope.publisher.base import DefaultPublication
 from zope.publisher.browser import BrowserRequest
 from zope.publisher.interfaces import NotFound
 from zope.publisher.publish import publish
 from zope.traversing.publicationtraverse import PublicationTraverser
 
-from scopes.interfaces import IContainer, ITraversable, IView
+from scopes.interfaces import ITraversable, IView
+from scopes.server.browser import getView
 from scopes.storage.folder import Root
 
 
@@ -29,12 +29,11 @@ def zope_app_factory(config):
 class Publication(DefaultPublication):
 
     def traverseName(self, request, ob, name):
-        next = None
+        next = getView(request, ob, name)
+        if next is not None:
+            return next
         if ITraversable.providedBy(ob):
             next = ob.get(name)
-        if next is None:
-            if name == 'index.html':
-                next = DefaultView(ob, request)
         if next is None:
             raise NotFound(ob, name, request)
         return next
@@ -44,18 +43,3 @@ class Publication(DefaultPublication):
             return ob, ()
         return ob, ('index.html',)
 
-
-@implementer(IView)
-class DefaultView:
-
-    def __init__(self, context, request):
-        self.context = context
-        self.request = request
-
-    def __call__(self):
-        ob = self.context
-        result = dict(head=ob.head, data=ob.data)
-        if IContainer.providedBy(ob):
-            result['items'] = list(ob.keys())
-        return json.dumps(result)
-

scopes/server/browser.py

@@ -0,0 +1,43 @@
+# scopes.server.browser
+
+import json
+from zope.interface import implementer
+from scopes.interfaces import IContainer, IView
+
+views = {}
+
+def register(contextClass, name):
+    def doRegister(viewClass):
+        nameEntry = views.setdefault(name, {})
+        key = contextClass and contextClass.prefix or ''
+        nameEntry[key] = viewClass
+        return viewClass
+    return doRegister
+
+def getView(request, ob, name):
+    nameEntry = views.get(name)
+    if nameEntry is None:
+        return None
+    viewClass = nameEntry.get(ob.__class__.prefix)
+    if viewClass is None:
+        viewClass = nameEntry.get('')
+    if viewClass is None:
+        return None
+    return viewClass(ob, request)
+
+
+@register(None, 'index.html')
+@implementer(IView)
+class DefaultView:
+
+    def __init__(self, context, request):
+        self.context = context
+        self.request = request
+
+    def __call__(self):
+        ob = self.context
+        result = dict(head=ob.head, data=ob.data)
+        if IContainer.providedBy(ob):
+            result['items'] = list(ob.keys())
+        return json.dumps(result)
+