add util.number_format -> number_format Jinja2 filter

Implement a `number_format` equivalent to PHP's version.

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/templates.py

@@ -30,6 +30,7 @@ env.filters["as_timezone"] = util.as_timezone
 env.filters["dedupe_qs"] = util.dedupe_qs
 env.filters["urlencode"] = quote_plus
 env.filters["get_vote"] = util.get_vote
+env.filters["number_format"] = util.number_format
 
 # Add captcha filters.
 env.filters["captcha_salt"] = captcha.captcha_salt_filter

aurweb/util.py

@@ -150,6 +150,11 @@ def get_vote(voteinfo, request: fastapi.Request):
     return voteinfo.tu_votes.filter(TUVote.User == request.user).first()
 
 
+def number_format(value: float, places: int):
+    """ A converter function similar to PHP's number_format. """
+    return f"{value:.{places}f}"
+
+
 def jsonify(obj):
     """ Perform a conversion on obj if it's needed. """
     if isinstance(obj, datetime):

test/test_util.py

@@ -30,3 +30,8 @@ def test_dedupe_qs():
     # Add key1=changed and key2=changed to the query and dedupe it.
     deduped = util.dedupe_qs(query_string, "key1=changed", "key3=changed")
     assert deduped == "key2=blah&key1=changed&key3=changed"
+
+
+def test_number_format():
+    assert util.number_format(0.222, 2) == "0.22"
+    assert util.number_format(0.226, 2) == "0.23"