Reduce datetime precision to 1 in topic listings

I don't think the extra precision is very meaningful on topics in
listings (especially now that it changes to absolute dates after a
week), so we can reduce that and it will make things look a bit less
cluttered.

tildes/tildes/lib/datetime.py

@@ -5,7 +5,7 @@
 
 from datetime import datetime, timedelta, timezone
 import re
-from typing import Any
+from typing import Any, Optional
 
 from ago import human
 
@@ -84,7 +84,9 @@ def utc_from_timestamp(timestamp: int) -> datetime:
     return datetime.fromtimestamp(timestamp, timezone.utc)
 
 
-def descriptive_timedelta(target: datetime, abbreviate: bool = False) -> str:
+def descriptive_timedelta(
+    target: datetime, abbreviate: bool = False, precision: Optional[int] = None
+) -> str:
     """Return a descriptive string for how long ago a datetime was.
 
     The returned string will be of a format like "4 hours ago" or "3 hours, 21 minutes
@@ -105,6 +107,7 @@ def descriptive_timedelta(target: datetime, abbreviate: bool = False) -> str:
     if seconds_ago < 1:
         return "a moment ago"
 
+    if not precision:
         # determine whether one or two precision levels is appropriate
         if seconds_ago < 3600:
             # if it's less than an hour, we always want only one precision level
@@ -132,13 +135,15 @@ def descriptive_timedelta(target: datetime, abbreviate: bool = False) -> str:
     return result
 
 
-def adaptive_date(target: datetime, abbreviate: bool = False) -> str:
+def adaptive_date(
+    target: datetime, abbreviate: bool = False, precision: Optional[int] = None
+) -> str:
     """Return a date string that switches from relative to absolute past a threshold."""
     threshold = timedelta(days=7)
 
     # if the date is more recent than threshold, return the relative "ago"-style string
     if utc_now() - target < threshold:
-        return descriptive_timedelta(target, abbreviate)
+        return descriptive_timedelta(target, abbreviate, precision)
 
     # if abbreviating, use the short version of month name ("Dec" instead of "December")
     if abbreviate:

tildes/tildes/templates/macros/datetime.jinja2

@@ -5,11 +5,11 @@
 <time datetime="{{ datetime.strftime('%Y-%m-%dT%H:%M:%SZ') }}" title="{{ datetime.strftime('%Y-%m-%d %H:%M:%S UTC') }}">{{ datetime|ago(abbreviate) }}</time>
 {%- endmacro %}
 
-{% macro adaptive_date_responsive(datetime, class_=None) -%}
+{% macro adaptive_date_responsive(datetime, class_=None, precision=None) -%}
 <time
   class="time-responsive{{ ' '+class_ if class_ else '' }}"
   datetime="{{ datetime.strftime('%Y-%m-%dT%H:%M:%SZ') }}"
   title="{{ datetime.strftime('%Y-%m-%d %H:%M:%S UTC') }}"
-  data-abbreviated="{{ datetime|adaptive_date(abbreviate=True) }}"
-><span class="time-responsive-full">{{ datetime|adaptive_date(abbreviate=False) }}</span></time>
+  data-abbreviated="{{ datetime|adaptive_date(abbreviate=True, precision=precision) }}"
+><span class="time-responsive-full">{{ datetime|adaptive_date(abbreviate=False, precision=precision) }}</span></time>
 {%- endmacro %}

tildes/tildes/templates/macros/topics.jinja2

@@ -85,7 +85,7 @@
         <div aria-label="Link domain">{{ topic.link_domain }}</div>
       {% endif %}
 
-      <div aria-label="Post time">{{ adaptive_date_responsive(topic.created_time) }}</div>
+      <div aria-label="Post time">{{ adaptive_date_responsive(topic.created_time, precision=1) }}</div>
     </footer>
 
     {{ topic_voting(topic) }}