Improve currencies (#604)

- Rename "No Currency" to ISO4217 "XXX"
- Use Babel to render currency symbols and names in currency lists
- Improve i18n in bill lists

Fix #601
Fix #600

1 files changed, 16 insertions, 1 deletions

diff --git a/ihatemoney/utils.py b/ihatemoney/utils.py
index 7fdad61..175b762 100644
--- a/ihatemoney/utils.py
+++ b/ihatemoney/utils.py
@@ -9,8 +9,9 @@ import os
 import re
 
 from babel import Locale
+from babel.numbers import get_currency_name, get_currency_symbol
 from flask import current_app, redirect, render_template
-from flask_babel import get_locale
+from flask_babel import get_locale, lazy_gettext as _
 import jinja2
 from werkzeug.routing import HTTPException, RoutingException
 
@@ -281,6 +282,20 @@ class FormEnum(Enum):
         return str(self.value)
 
 
+def render_localized_currency(code, detailed=True):
+    if code == "XXX":
+        return _("No Currency")
+    locale = get_locale() or "en_US"
+    symbol = get_currency_symbol(code, locale=locale)
+    details = ""
+    if detailed:
+        details = f" − {get_currency_name(code, locale=locale)}"
+    if symbol == code:
+        return f"{code}{details}"
+    else:
+        return f"{code} − {symbol}{details}"
+
+
 def render_localized_template(template_name_prefix, **context):
     """Like render_template(), but selects the right template according to the
     current user language.  Fallback to English if a template for the