Move preview check onto storages

gedgo/storages.py

@@ -71,6 +71,16 @@ def preview(self, name, size='w128h128'):
         )[1].content)
         return resize_thumb(file_, size)
 
+    def can_preview(self, name):
+        return (
+            '.' in name and
+            name.rsplit('.', 1)[1].lower() in (
+                'jpeg', 'jpg', 'gif', 'png', 'pdf', 'tif', 'tiff',
+                'mov', 'avi', 'doc', 'mpg', 'bmp', 'psd'
+            )
+        )
+
+
 
 class FileSystemSearchableStorage(FileSystemStorage):
     def search(self, query):
@@ -86,6 +96,14 @@ def search(self, query):
     def preview(self, name, size='w128h128'):
         return resize_thumb(self.open(name), size)
 
+    def can_preview(self, name):
+        return (
+            '.' in name and
+            name.rsplit('.', 1)[1].lower() in (
+                'jpeg', 'jpg'
+            )
+        )
+
 
 def resize_thumb(file_, size='w128h128', crop=None):
     im = Image.open(file_)

gedgo/views/research.py

@@ -123,16 +123,8 @@ def can_preview(storage, name):
     """
     Check if the file in question can generate a preview
     """
-    # TODO: Move suffix check onto storage child classes, since filesystem
-    # won't support previewing lots of these other types
     return (
         hasattr(storage, 'preview') and
         is_ascii(name) and
-        (
-            '.' in name and
-            name.rsplit('.', 1)[1].lower() in (
-                'jpeg', 'jpg', 'gif', 'png', 'pdf',
-                'mov', 'avi', 'doc', 'mpg', 'bmp'
-            )
-        )
+        storage.can_preview(name)
     )