From 862748a7acd3db1257418101eec626688e0d3c78 Mon Sep 17 00:00:00 2001
From: Luflosi <luflosi@luflosi.de>
Date: Tue, 23 Aug 2022 17:50:28 +0200
Subject: [PATCH] Internationalise the decimal separator in intcomma()

---
 src/humanize/__init__.py |  3 ++-
 src/humanize/i18n.py     | 20 +++++++++++++++++++-
 src/humanize/number.py   | 10 ++++++----
 tests/test_i18n.py       |  6 ++++++
 4 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/src/humanize/__init__.py b/src/humanize/__init__.py
index 25c0ba1..7d3ae65 100644
--- a/src/humanize/__init__.py
+++ b/src/humanize/__init__.py
@@ -1,7 +1,7 @@
 """Main package for humanize."""
 
 from humanize.filesize import naturalsize
-from humanize.i18n import activate, deactivate, thousands_separator
+from humanize.i18n import activate, deactivate, decimal_separator, thousands_separator
 from humanize.number import (
     apnumber,
     clamp,
@@ -36,6 +36,7 @@
     "apnumber",
     "clamp",
     "deactivate",
+    "decimal_separator",
     "fractional",
     "intcomma",
     "intword",
diff --git a/src/humanize/i18n.py b/src/humanize/i18n.py
index 8c02923..664b074 100644
--- a/src/humanize/i18n.py
+++ b/src/humanize/i18n.py
@@ -5,7 +5,7 @@
 import os.path
 from threading import local
 
-__all__ = ["activate", "deactivate", "thousands_separator"]
+__all__ = ["activate", "deactivate", "decimal_separator", "thousands_separator"]
 
 _TRANSLATIONS: dict[str | None, gettext_module.NullTranslations] = {
     None: gettext_module.NullTranslations()
@@ -19,6 +19,11 @@
     "fr_FR": " ",
 }
 
+# Mapping of locale to decimal separator
+_DECIMAL_SEPARATOR = {
+    "de_DE": ",",
+}
+
 
 def _get_default_locale_path() -> str | None:
     try:
@@ -173,3 +178,16 @@ def thousands_separator() -> str:
     except (AttributeError, KeyError):
         sep = ","
     return sep
+
+
+def decimal_separator() -> str:
+    """Return the decimal separator for a locale, default to dot.
+
+    Returns:
+         str: Decimal separator.
+    """
+    try:
+        sep = _DECIMAL_SEPARATOR[_CURRENT.locale]
+    except (AttributeError, KeyError):
+        sep = "."
+    return sep
diff --git a/src/humanize/number.py b/src/humanize/number.py
index ac134e3..bfd2b48 100644
--- a/src/humanize/number.py
+++ b/src/humanize/number.py
@@ -13,7 +13,7 @@
 from .i18n import _ngettext
 from .i18n import _ngettext_noop as NS_
 from .i18n import _pgettext as P_
-from .i18n import thousands_separator
+from .i18n import decimal_separator, thousands_separator
 
 if TYPE_CHECKING:
     if sys.version_info >= (3, 10):
@@ -130,10 +130,11 @@ def intcomma(value: NumberOrString, ndigits: int | None = None) -> str:
     Returns:
         str: String containing commas every three digits.
     """
-    sep = thousands_separator()
+    thousands_sep = thousands_separator()
+    decimal_sep = decimal_separator()
     try:
         if isinstance(value, str):
-            value = value.replace(sep, "")
+            value = value.replace(thousands_sep, "").replace(decimal_sep, ".")
             if "." in value:
                 value = float(value)
             else:
@@ -147,8 +148,9 @@ def intcomma(value: NumberOrString, ndigits: int | None = None) -> str:
         orig = "{0:.{1}f}".format(value, ndigits)
     else:
         orig = str(value)
+    orig = orig.replace(".", decimal_sep)
     while True:
-        new = re.sub(r"^(-?\d+)(\d{3})", rf"\g<1>{sep}\g<2>", orig)
+        new = re.sub(r"^(-?\d+)(\d{3})", rf"\g<1>{thousands_sep}\g<2>", orig)
         if orig == new:
             return new
         orig = new
diff --git a/tests/test_i18n.py b/tests/test_i18n.py
index 4a60af1..f8782f8 100644
--- a/tests/test_i18n.py
+++ b/tests/test_i18n.py
@@ -44,6 +44,12 @@ def test_intcomma() -> None:
     try:
         humanize.i18n.activate("de_DE")
         assert humanize.intcomma(number) == "10.000.000"
+        assert humanize.intcomma(1_234_567.8901) == "1.234.567,8901"
+        assert humanize.intcomma(1_234_567.89) == "1.234.567,89"
+        assert humanize.intcomma("1234567,89") == "1.234.567,89"
+        assert humanize.intcomma("1.234.567,89") == "1.234.567,89"
+        assert humanize.intcomma("1.234.567,8") == "1.234.567,8"
+
         humanize.i18n.activate("fr_FR")
         assert humanize.intcomma(number) == "10 000 000"