localization support

modules/localization.py

@@ -0,0 +1,31 @@
+import json
+import os
+import sys
+import traceback
+
+localizations = {}
+
+
+def list_localizations(dirname):
+    localizations.clear()
+
+    for file in os.listdir(dirname):
+        fn, ext = os.path.splitext(file)
+        if ext.lower() != ".json":
+            continue
+
+        localizations[fn] = os.path.join(dirname, file)
+
+
+def localization_js(current_localization_name):
+    fn = localizations.get(current_localization_name, None)
+    data = {}
+    if fn is not None:
+        try:
+            with open(fn, "r", encoding="utf8") as file:
+                data = json.load(file)
+        except Exception:
+            print(f"Error loading localization from {fn}:", file=sys.stderr)
+            print(traceback.format_exc(), file=sys.stderr)
+
+    return f"var localization = {json.dumps(data)}\n"