Make detection of best possible locale for application optional to enable forcing default.

lib/vial/config.py

@@ -65,6 +65,8 @@ class Config:  # pylint: disable=locally-disabled,too-few-public-methods
     #
     BABEL_DEFAULT_LOCALE   = vial.const.DEFAULT_LOCALE
     BABEL_DEFAULT_TIMEZONE = vial.const.DEFAULT_TIMEZONE
+    BABEL_DETECT_LOCALE    = True
+    """Custom configuration, make detection of best possible locale optional to enable forcing default."""
 
     #
     # Flask-SQLAlchemy configurations.

lib/vial/intl.py

@@ -29,13 +29,14 @@ def get_locale():  # pylint: disable=locally-disabled,unused-variable
 
     # Store the best locale selection into the session.
     if 'locale' not in flask.session or not flask.session['locale']:
-        flask.session['locale'] = flask.request.accept_languages.best_match(
-            flask.current_app.config['SUPPORTED_LOCALES'].keys()
-        )
+        if flask.current_app.config['BABEL_DETECT_LOCALE']:
+            flask.session['locale'] = flask.request.accept_languages.best_match(
+                flask.current_app.config['SUPPORTED_LOCALES'].keys()
+            )
+        else:
+            flask.session['locale'] = flask.current_app.config['BABEL_DEFAULT_LOCALE']
 
-    if 'locale' in flask.session and flask.session['locale']:
-        return flask.session['locale']
-    return flask.current_app.config['BABEL_DEFAULT_LOCALE']
+    return flask.session['locale']
 
 @BABEL.timezoneselector
 def get_timezone():  # pylint: disable=locally-disabled,unused-variable