Add function get_active_object and bugfixes

* Dont throw errors in overlay.get_projector_html if debug == False
* fixe check of active slide in agenda
* Fix #1121

openslides/agenda/models.py

@@ -112,10 +112,7 @@ class Item(SlideMixin, MPTTModel):
 
     def save(self, *args, **kwargs):
         super(Item, self).save(*args, **kwargs)
-        active_slide = get_active_slide()
-        active_slide_pk = active_slide.get('pk', None)
-        if (active_slide['callback'] == 'agenda' and
-                unicode(self.parent_id) == unicode(active_slide_pk)):
+        if self.parent and self.parent.is_active_slide():
             update_projector()
 
     def __unicode__(self):
@@ -359,14 +356,10 @@ class Speaker(models.Model):
         Checks, if the agenda item, or parts of it, is on the projector.
         If yes, it updates the projector.
         """
-        active_slide = get_active_slide()
-        active_slide_pk = active_slide.get('pk', None)
-        slide_type = active_slide.get('type', None)
-        if (active_slide['callback'] == 'agenda' and
-                unicode(self.item_id) == unicode(active_slide_pk)):
-            if slide_type == 'list_of_speakers':
+        if self.item.is_active_slide():
+            if get_active_slide().get('type', None) == 'list_of_speakers':
                 update_projector()
-            elif slide_type is None:
+            else:
                 update_projector_overlay('agenda_speaker')
 
     def begin_speach(self):

openslides/agenda/signals.py

@@ -13,7 +13,7 @@ from django.utils.translation import ugettext_lazy, ugettext_noop
 
 from openslides.config.api import config, ConfigPage, ConfigVariable
 from openslides.config.signals import config_signal
-from openslides.projector.api import get_active_slide
+from openslides.projector.api import get_active_slide, get_active_object
 from openslides.projector.projector import Overlay
 from openslides.projector.signals import projector_overlays
 
@@ -97,23 +97,30 @@ def agenda_list_of_speakers(sender, **kwargs):
         The overlay is only shown on agenda-items and not on the
         list-of-speakers slide.
         """
-        active_slide = get_active_slide()
-        slide_type = active_slide.get('type', None)
-        active_slide_pk = active_slide.get('pk', None)
-        if (active_slide['callback'] == 'agenda' and
-                slide_type != 'list_of_speakers' and
-                active_slide_pk is not None):
-            item = Item.objects.get(pk=active_slide_pk)
+        slide = get_active_object()
+        if isinstance(slide, Item):
+            item = slide
+        else:
+            # TODO: If there are more the one items, use the first one in the
+            #       mptt tree that is not closed
+            try:
+                item = Item.objects.filter(
+                    content_type=ContentType.objects.get_for_model(slide),
+                    object_id=slide.pk)[0]
+            except IndexError:
+                item = None
+
+        if item and get_active_slide().get('type', None) != 'list_of_speakers':
             list_of_speakers = item.get_list_of_speakers(
                 old_speakers_count=config['agenda_show_last_speakers'],
                 coming_speakers_count=5)
-            context = {
+
+            value = render_to_string('agenda/overlay_speaker_projector.html', {
                 'list_of_speakers': list_of_speakers,
-                'closed': item.speaker_list_closed,
-            }
-            return render_to_string('agenda/overlay_speaker_projector.html', context)
+                'closed': item.speaker_list_closed})
         else:
-            return None
+            value = None
+        return value
 
     return Overlay(name, get_widget_html, get_projector_html)
 

openslides/agenda/slides.py

@@ -60,4 +60,4 @@ def agenda_slide(**kwargs):
     return slide
 
 
-register_slide('agenda', agenda_slide)
+register_slide('agenda', agenda_slide, Item)

openslides/mediafile/slides.py

@@ -30,4 +30,4 @@ def mediafile_presentation_as_slide(**kwargs):
     return render_to_string('mediafile/presentation_slide.html', context)
 
 
-register_slide('mediafile', mediafile_presentation_as_slide)
+register_slide('mediafile', mediafile_presentation_as_slide, Mediafile)

openslides/projector/api.py

@@ -20,6 +20,14 @@ A dictonary where the key is the name of a slide, and the value is a
 callable object which returns the html code for a slide.
 """
 
+slide_model = {}
+"""
+A dictonary for SlideMixin models to reference from the slide_callback_name to
+the Model
+"""
+# TODO: Find a bether way to do this. Maybe by reimplementing slides with
+#       metaclasses
+
 
 class SlideError(OpenSlidesError):
     pass
@@ -139,11 +147,15 @@ def get_projector_overlays_js(as_json=False):
     return javascript
 
 
-def register_slide(name, callback):
+def register_slide(name, callback, model=None):
     """
-    Register a function as slide callback.
+    Registers a function as slide callback.
+
+    The optional argument 'model' is used to register a SlideModelClass.
     """
     slide_callback[name] = callback
+    if model is not None:
+        slide_model[name] = model
 
 
 def register_slide_model(SlideModel, template):
@@ -169,7 +181,7 @@ def register_slide_model(SlideModel, template):
 
         return render_to_string(template, context)
 
-    register_slide(SlideModel.slide_callback_name, model_slide)
+    register_slide(SlideModel.slide_callback_name, model_slide, SlideModel)
 
 
 def set_active_slide(callback, **kwargs):
@@ -192,6 +204,26 @@ def get_active_slide():
     return config['projector_active_slide']
 
 
+def get_active_object():
+    """
+    Returns an object if the active slide is an instance of SlideMixin.
+    In other case, returns None
+    """
+    active_slide_dict = get_active_slide()
+    callback_name = active_slide_dict.get('callback', None)
+    object_pk = active_slide_dict.get('pk', None)
+    try:
+        Model = slide_model[callback_name]
+    except KeyError:
+        value = None
+    else:
+        try:
+            value = Model.objects.get(pk=object_pk)
+        except Model.DoesNotExist:
+            value = None
+    return value
+
+
 def get_all_widgets(request, session=False):
     """
     Collects the widgets from all apps and returns the Widget objects as sorted

openslides/projector/projector.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+from django.conf import settings
 from django.template import RequestContext
 from django.template.loader import render_to_string
 
@@ -86,7 +87,15 @@ class Overlay(object):
         """
         Returns the html code for the projector.
         """
-        return self.get_html_wrapper(self.projector_html_callback())
+        try:
+            value = self.get_html_wrapper(self.projector_html_callback())
+        except Exception as exception:
+            if settings.DEBUG:
+                raise exception
+            else:
+                # Catch all errors, so an overlay can not kill the projector
+                value = ''
+        return value
 
     def get_javascript(self):
         """

tests/projector/test_api.py

@@ -139,9 +139,14 @@ class ApiFunctions(TestCase):
 
     def test_register_slide(self):
         mock_slide_callback = {}
+        mock_slide_model = {}
+        with patch('openslides.projector.api.slide_model', mock_slide_model):
             with patch('openslides.projector.api.slide_callback', mock_slide_callback):
                 projector_api.register_slide('some name', 'some callback')
-        self.assertEqual(mock_slide_callback, {'some name': 'some callback'})
+                projector_api.register_slide('other name', 'other callback', 'Model')
+        self.assertEqual(mock_slide_callback, {'some name': 'some callback',
+                                               'other name': 'other callback'})
+        self.assertEqual(mock_slide_model, {'other name': 'Model'})
 
     @patch('openslides.projector.api.render_to_string')
     @patch('openslides.projector.api.register_slide')
@@ -156,6 +161,7 @@ class ApiFunctions(TestCase):
         projector_api.register_slide_model(mock_SlideModel, 'some template')
         used_args, __ = mock_register_slide.call_args
         self.assertEqual(used_args[0], 'mock_callback_name')
+        self.assertEqual(used_args[2], mock_SlideModel)
 
         # Test the generated slide function
         used_args[1](pk=1)
@@ -182,3 +188,26 @@ class ApiFunctions(TestCase):
         with patch('openslides.projector.api.config', mock_config):
             value = projector_api.get_active_slide()
         self.assertEqual(value, 'value')
+
+    def test_get_active_object(self):
+        mock_Model = MagicMock()
+        mock_Model.DoesNotExist = Exception
+        mock_slide_model = {'mock_model': mock_Model}
+        mock_active_slide = {'callback': 'unknown'}
+        mock_get_active_slide = MagicMock(return_value=mock_active_slide)
+
+        with patch('openslides.projector.api.get_active_slide', mock_get_active_slide):
+            with patch('openslides.projector.api.slide_model', mock_slide_model):
+                # test unknwon slide_callback_name
+                self.assertIsNone(projector_api.get_active_object())
+
+                # test unknown object
+                mock_Model.objects.get.side_effect = Exception
+                mock_active_slide.update(callback='mock_model', pk=42)
+                self.assertIsNone(projector_api.get_active_object())
+                mock_Model.objects.get.assert_called_with(pk=42)
+
+                # test success
+                mock_Model.objects.get.side_effect = None
+                mock_Model.objects.get.return_value = 'success'
+                self.assertEqual(projector_api.get_active_object(), 'success')

tests/projector/test_overlays.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+
+from mock import MagicMock, patch
+
+from openslides.projector.projector import Overlay
+from openslides.utils.test import TestCase
+
+
+class OverlayTest(TestCase):
+    def test_error_in_html(self):
+        """
+        Tests that the methof get_projector_html does not raise any errors.
+        """
+        get_projector_html = MagicMock(side_effect=Exception('no good error'))
+        overlay = Overlay('test_overlay', lambda: 'widget_html', get_projector_html)
+
+        # Test in productive mode
+        with patch('openslides.projector.projector.settings.DEBUG', False):
+            self.assertEqual(overlay.get_projector_html(), '')
+
+        # Test in debug mode
+        with patch('openslides.projector.projector.settings.DEBUG', True):
+            self.assertRaisesMessage(
+                Exception,
+                'no good error',
+                overlay.get_projector_html)