From 83a3802b6a367ed20ef2c32552dc9edf0325fb5e Mon Sep 17 00:00:00 2001
From: Fabian Braun <fsbraun@gmx.de>
Date: Mon, 27 Mar 2017 11:00:30 +0200
Subject: [PATCH] Preset image and thumbnail sizes on a per app level.

---
 djangocms_blog/admin.py         |  1 +
 djangocms_blog/cms_appconfig.py | 19 +++++++++++++++++++
 djangocms_blog/forms.py         | 10 ++++++++++
 3 files changed, 30 insertions(+)

diff --git a/djangocms_blog/admin.py b/djangocms_blog/admin.py
index f7cbb8b..4037db1 100755
--- a/djangocms_blog/admin.py
+++ b/djangocms_blog/admin.py
@@ -411,6 +411,7 @@ class BlogConfigAdmin(BaseAppHookConfig, TranslatableAdmin):
                 'fields': (
                     'config.paginate_by', 'config.url_patterns', 'config.template_prefix',
                     'config.menu_structure', 'config.menu_empty_categories',
+                    ('config.default_image_full', 'config.default_image_thumbnail'),
                 ),
                 'classes': ('collapse',)
             }),
diff --git a/djangocms_blog/cms_appconfig.py b/djangocms_blog/cms_appconfig.py
index 36ff2cc..24cbea5 100644
--- a/djangocms_blog/cms_appconfig.py
+++ b/djangocms_blog/cms_appconfig.py
@@ -11,6 +11,11 @@ from parler.models import TranslatableModel, TranslatedFields
 
 from .settings import MENU_TYPE_COMPLETE, get_setting
 
+try:  # pragma: no cover
+    from cmsplugin_filer_image.models import ThumbnailOption  # NOQA
+except ImportError:  # pragma: no cover
+    from filer.models import ThumbnailOption  # NOQA
+
 
 class BlogConfig(TranslatableModel, AppHookConfig):
     """
@@ -36,6 +41,20 @@ class BlogConfigForm(AppDataForm):
         label=_('Post published by default'), required=False,
         initial=get_setting('DEFAULT_PUBLISHED')
     )
+    default_image_full = forms.ModelChoiceField(
+        label=_('Default size of full images'),
+        queryset=ThumbnailOption.objects.all(),
+        required=False,
+        help_text=_('If left  empty the image size will have to be set for '
+                    'every newly created post.'),
+    )
+    default_image_thumbnail = forms.ModelChoiceField(
+        label=_('Default size of thumbnail images'),
+        queryset=ThumbnailOption.objects.all(),
+        required=False,
+        help_text=_('If left  empty the thumbnail image size will have to be '
+                    'set for every newly created post.'),
+    )
     url_patterns = forms.ChoiceField(
         label=_('Permalink structure'), required=False,
         initial=get_setting('AVAILABLE_PERMALINK_STYLES')[0][0],
diff --git a/djangocms_blog/forms.py b/djangocms_blog/forms.py
index 7ccadd7..bd703cd 100644
--- a/djangocms_blog/forms.py
+++ b/djangocms_blog/forms.py
@@ -69,3 +69,13 @@ class PostAdminForm(TranslatableModelForm):
             # Don't allow app_configs to be added here. The correct way to add an
             # apphook-config is to create an apphook on a cms Page.
             self.fields['app_config'].widget.can_add_related = False
+
+        if 'app_config' in self.data and self.data['app_config'] \
+                and not self.instance.id:  # Instance must not be saved (yet)
+            config = BlogConfig.objects.get(pk=int(self.data['app_config']))
+            if 'main_image_full' not in self.data or self.data['main_image_full'] == '':
+                default = config.app_data['config'].get('default_image_full')
+                self.data['main_image_full'] = str(default.id) if default else ''
+            if 'main_image_thumbnail' not in self.data or self.data['main_image_thumbnail'] == '':
+                default = config.app_data['config'].get('default_image_thumbnail')
+                self.data['main_image_thumbnail'] = str(default.id) if default else ''