fixup! Show times as local time

src/servala/frontend/templatetags/pprint_filters.py

@@ -1,6 +1,11 @@
 import json
+from datetime import datetime
 
 from django import template
+from django.utils.html import format_html
+from django.utils.safestring import mark_safe
+
+from servala.core.crd.utils import deslugify
 
 register = template.Library()
 
@@ -10,3 +15,38 @@ def pprint(value):
     if isinstance(value, (dict, list)):
         return json.dumps(value, indent=2)
     return value
+
+
+@register.filter
+def localtime_tag(value, format_str="datetime"):
+    """
+    Render a datetime value as a <time> element with datetime attribute.
+    JavaScript will convert this to local time on page load.
+
+    Usage: {{ instance.created_at|localtime_tag }}
+           {{ instance.created_at|localtime_tag:"date" }}
+           {{ instance.created_at|localtime_tag:"time" }}
+    """
+    if value is None:
+        return "-"
+
+    if isinstance(value, str):
+        iso_value = value
+    elif isinstance(value, datetime):
+        iso_value = value.isoformat()
+    else:
+        return str(value)
+
+    if (
+        not iso_value.endswith("Z")
+        and "+" not in iso_value
+        and "-" not in iso_value[10:]
+    ):
+        iso_value += "Z"
+
+    return format_html(
+        '<time datetime="{}" data-format="{}" class="local-time">{}</time>',
+        iso_value,
+        format_str,
+        iso_value,
+    )