Let OFS File/Image fire lifecycle events

doc/CHANGES.rst

@@ -27,6 +27,10 @@ Bugs Fixed
 Features Added
 ++++++++++++++
 
+- Made OFS.Image.File and OFS.Image.Image send IObjectModifiedEvent when
+  created through their factories and modified through the ZMI forms
+  (manage_edit() and manage_upload()).
+
 - Moved zope.formlib / zope.app.form integration into a separate package
   called five.formlib.
 

src/OFS/Image.py

@@ -46,6 +46,10 @@ from OFS.Cache import Cacheable
 from OFS.PropertyManager import PropertyManager
 from OFS.SimpleItem import Item_w__name__
 
+from zope.event import notify
+from zope.lifecycleevent import ObjectModifiedEvent
+from zope.lifecycleevent import ObjectCreatedEvent
+
 manage_addFileForm = DTMLFile('dtml/imageAdd',
                               globals(),
                               Kind='File',
@@ -69,12 +73,16 @@ def manage_addFile(self, id, file='', title='', precondition='',
     # First, we create the file without data:
     self._setObject(id, File(id,title,'',content_type, precondition))
     
+    newFile = self._getOb(id)
+    
     # Now we "upload" the data.  By doing this in two steps, we
     # can use a database trick to make the upload more efficient.
     if file:
-        self._getOb(id).manage_upload(file)
+        newFile.manage_upload(file)
     if content_type:
-        self._getOb(id).content_type=content_type
+        newFile.content_type=content_type
+    
+    notify(ObjectCreatedEvent(newFile))
     
     if REQUEST is not None:
         REQUEST['RESPONSE'].redirect(self.absolute_url()+'/manage_main')
@@ -469,6 +477,9 @@ class File(Persistent, Implicit, PropertyManager,
             self.update_data(filedata, content_type, len(filedata))
         else:
             self.ZCacheable_invalidate()
+        
+        notify(ObjectModifiedEvent(self))
+        
         if REQUEST:
             message="Saved changes."
             return self.manage_main(self,REQUEST,manage_tabs_message=message)
@@ -488,6 +499,8 @@ class File(Persistent, Implicit, PropertyManager,
                                             'application/octet-stream')
         self.update_data(data, content_type, size)
         
+        notify(ObjectModifiedEvent(self))
+        
         if REQUEST:
             message="Saved changes."
             return self.manage_main(self,REQUEST,manage_tabs_message=message)
@@ -666,12 +679,16 @@ def manage_addImage(self, id, file, title='', precondition='', content_type='',
     # First, we create the image without data:
     self._setObject(id, Image(id,title,'',content_type, precondition))
     
+    newFile = self._getOb(id)
+    
     # Now we "upload" the data.  By doing this in two steps, we
     # can use a database trick to make the upload more efficient.
     if file:
-        self._getOb(id).manage_upload(file)
+        newFile.manage_upload(file)
     if content_type:
-        self._getOb(id).content_type=content_type
+        newFile.content_type=content_type
+    
+    notify(ObjectCreatedEvent(newFile))
     
     if REQUEST is not None:
         try:    url=self.DestinationURL()

src/OFS/tests/testFileAndImage.py

@@ -8,6 +8,8 @@ import os, sys
 import time
 from cStringIO import StringIO
 
+from Acquisition import aq_base
+
 from OFS.Application import Application
 from OFS.SimpleItem import SimpleItem
 from OFS.Cache import ZCM_MANAGERS
@@ -19,6 +21,12 @@ from Testing.makerequest import makerequest
 from zExceptions import Redirect
 import transaction
 
+import OFS.Image
+
+from zope.component import adapter
+from zope.lifecycleevent.interfaces import IObjectModifiedEvent
+from zope.lifecycleevent.interfaces import IObjectCreatedEvent
+
 try:
     here = os.path.dirname(os.path.abspath(__file__))
 except:
@@ -57,7 +65,7 @@ class DummyCache:
                    mtime_func=None):
         self.get = ob
         if self.si:
-            return si
+            return self.si
 
     def ZCache_invalidate(self, ob):
         self.invalidated = ob
@@ -78,6 +86,38 @@ class DummyCacheManager(SimpleItem):
     def ZCacheManager_getCache(self):
         return ADummyCache
 
+class EventCatcher(object):
+    
+    def __init__(self):
+        self.created = []
+        self.modified = []
+        
+        self.setUp()
+    
+    def setUp(self):
+        from zope.component import provideHandler
+        provideHandler(self.handleCreated)
+        provideHandler(self.handleModified)
+    
+    def tearDown(self):
+        from zope.component import getSiteManager
+        getSiteManager().unregisterHandler(self.handleCreated)
+        getSiteManager().unregisterHandler(self.handleModified)
+    
+    def reset(self):
+        self.created = []
+        self.modified = []
+    
+    @adapter(IObjectCreatedEvent)
+    def handleCreated(self, event):
+        if isinstance(event.object, OFS.Image.File):
+            self.created.append(event)
+    
+    @adapter(IObjectModifiedEvent)
+    def handleModified(self, event):
+        if isinstance(event.object, OFS.Image.File):
+            self.modified.append(event)
+
 class FileTests(unittest.TestCase):
     data = open(filedata, 'rb').read()
     content_type = 'application/octet-stream'
@@ -85,6 +125,8 @@ class FileTests(unittest.TestCase):
     def setUp( self ):
 
         self.connection = makeConnection()
+        self.eventCatcher = EventCatcher()
+        
         try:
             r = self.connection.root()
             a = Application()
@@ -108,6 +150,15 @@ class FileTests(unittest.TestCase):
         transaction.begin()
         self.file = getattr( self.app, 'file' )
         
+        # Since we do the create here, let's test the events here too
+        self.assertEquals(1, len(self.eventCatcher.created))
+        self.failUnless(aq_base(self.eventCatcher.created[0].object) is aq_base(self.file))
+        
+        self.assertEquals(1, len(self.eventCatcher.modified))
+        self.failUnless(aq_base(self.eventCatcher.created[0].object) is aq_base(self.file))
+        
+        self.eventCatcher.reset()
+        
     def tearDown( self ):
         del self.file
         transaction.abort()
@@ -118,6 +169,8 @@ class FileTests(unittest.TestCase):
         del self.connection
         ADummyCache.clear()
         
+        self.eventCatcher.tearDown()
+
     def testViewImageOrFile(self):
         self.assertRaises(Redirect, self.file.view_image_or_file, 'foo')
 
@@ -153,18 +206,24 @@ class FileTests(unittest.TestCase):
         self.assertEqual(self.file.content_type, 'text/plain')
         self.failUnless(ADummyCache.invalidated)
         self.failUnless(ADummyCache.set)
+        self.assertEquals(1, len(self.eventCatcher.modified))
+        self.failUnless(self.eventCatcher.modified[0].object is self.file)
 
     def testManageEditWithoutFileData(self):
         self.file.manage_edit('foobar', 'text/plain')
         self.assertEqual(self.file.title, 'foobar')
         self.assertEqual(self.file.content_type, 'text/plain')
         self.failUnless(ADummyCache.invalidated)
+        self.assertEquals(1, len(self.eventCatcher.modified))
+        self.failUnless(self.eventCatcher.modified[0].object is self.file)
 
     def testManageUpload(self):
         f = StringIO('jammyjohnson')
         self.file.manage_upload(f)
         self.assertEqual(self.file.data, 'jammyjohnson')
         self.assertEqual(self.file.content_type, 'application/octet-stream')
+        self.assertEquals(1, len(self.eventCatcher.modified))
+        self.failUnless(self.eventCatcher.modified[0].object is self.file)
 
     def testIfModSince(self):
         now = time.time()
@@ -302,3 +361,4 @@ def test_suite():
 
 if __name__ == '__main__':
     unittest.main(defaultTest='test_suite')
+