tidy up table image dlocks

generic/tables.py

@@ -12,7 +12,7 @@ from generic.models import CidUser
 from django.contrib.auth.models import User
 
 
-class ImageColumn(tables.Column):
+class SingleImageColumn(tables.Column):
     def render(self, value):
         try:
             thumbnailer = get_thumbnailer(value)
@@ -20,6 +20,53 @@ class ImageColumn(tables.Column):
         except InvalidImageFormatError:
             return format_html('<span title="{}">Invalid image url<span>', value)
 
+class BlockImageColumn(tables.Column):
+    def render(self, value):
+        blocks = []
+        for obj in value.all():
+            blocks.append(obj.get_block())
+        return format_html(
+            """<span class='multi-image-block'>
+            {}
+            </span>""".format("".join(blocks))
+        )
+
+class SeriesImageColumn(tables.Column):
+    def render(self, value):
+        obj = value.first()
+
+        if obj is None:
+            return "None"
+
+        image_object = obj.image
+        try:
+            thumbnailer = get_thumbnailer(image_object)
+            return format_html(
+                '<img src="/media/{}" /><br/>[{}]',
+                thumbnailer["exam-list"],
+                value.count(),
+            )
+        except InvalidImageFormatError:
+            return format_html(
+                '<span title="{}">Invalid image url<span><br/>[{}]',
+                image_object,
+                value.count(),
+            )
+
+class FirstImageColumn(tables.Column):
+    def render(self, value):
+        obj = value.all()
+
+        if not obj:
+            return format_html('<span>No image<span>')
+
+        image_object = obj[0].image
+        try:
+            thumbnailer = get_thumbnailer(image_object)
+            return format_html('<img src="/media/{}" />', thumbnailer["exam-list"])
+        except InvalidImageFormatError:
+            return format_html('<span title="{}">Invalid image url<span>', image_object)
+
 
 class CidUserTable(tables.Table):
     # edit = tables.LinkColumn(