Enable translation support

.gitignore

@@ -11,6 +11,7 @@ app/public/thumbnails
 celerybeat-schedule
 /data
 .idea
+*.mo
 
 # Created by https://www.gitignore.io/api/linux,macos,python,windows
 

Dockerfile

@@ -16,7 +16,9 @@ COPY utils utils
 COPY config.cfg config.cfg
 COPY migrations migrations
 COPY app app
+COPY translations translations
 
+RUN pybabel compile -d translations
 RUN chown -R cdb:cdb /home/cdb
 
 USER cdb

app/__init__.py

@@ -33,6 +33,12 @@ app.config["FLATPAGES_ROOT"] = "flatpages"
 app.config["FLATPAGES_EXTENSION"] = ".md"
 app.config["FLATPAGES_MARKDOWN_EXTENSIONS"] = MARKDOWN_EXTENSIONS
 app.config["FLATPAGES_EXTENSION_CONFIG"] = MARKDOWN_EXTENSION_CONFIG
+app.config["BABEL_TRANSLATION_DIRECTORIES"] = "../translations"
+app.config["LANGUAGES"] = {
+    "en": "English",
+    "fr": "Français",
+}
+
 app.config.from_pyfile(os.environ["FLASK_CONFIG"])
 
 r = redis.Redis.from_url(app.config["REDIS_URL"])
@@ -57,6 +63,7 @@ login_manager = LoginManager()
 login_manager.init_app(app)
 login_manager.login_view = "users.login"
 
+
 from .sass import sass
 sass(app)
 
@@ -66,14 +73,9 @@ if not app.debug and app.config["MAIL_UTILS_ERROR_SEND_TO"]:
 	app.logger.addHandler(build_handler(app))
 
 
-
-
-# @babel.localeselector
-# def get_locale():
-# 	return request.accept_languages.best_match(app.config["LANGUAGES"].keys())
-
 from . import models, template_filters
 
+
 @login_manager.user_loader
 def load_user(user_id):
 	return models.User.query.filter_by(username=user_id).first()
@@ -104,7 +106,8 @@ def check_for_ban():
 			current_user.rank = models.UserRank.MEMBER
 			models.db.session.commit()
 
-from .utils import clearNotifications
+from .utils import clearNotifications, is_safe_url
+
 
 @app.before_request
 def check_for_notifications():
@@ -114,3 +117,31 @@ def check_for_notifications():
 @app.errorhandler(404)
 def page_not_found(e):
 	return render_template("404.html"), 404
+
+
+@babel.localeselector
+def get_locale():
+	locales = app.config["LANGUAGES"].keys()
+
+	locale = request.cookies.get("locale")
+	if locale in locales:
+		return locale
+
+	return request.accept_languages.best_match(locales)
+
+
+@app.route("/set-locale/", methods=["POST"])
+def set_locale():
+	locale = request.form.get("locale")
+	if locale not in app.config["LANGUAGES"].keys():
+		flash("Unknown locale {}".format(locale), "danger")
+		locale = None
+
+	next_url = request.form.get("r")
+	if next_url and is_safe_url(next_url):
+		resp = make_response(redirect(next_url))
+	else:
+		resp = make_response(redirect(url_for("homepage.home")))
+
+	resp.set_cookie("locale", locale)
+	return resp

app/templates/base.html

@@ -109,12 +109,15 @@
 								<i class="fas fa-plus"></i>
 							</a>
 						</li>
+
 						<li class="nav-item dropdown">
 							<a class="nav-link dropdown-toggle"
 									data-toggle="dropdown"
 									role="button"
-								aria-expanded="false">{{ current_user.display_name }}
+									aria-expanded="false">
-									<span class="caret"></span></a>
+								{{ current_user.display_name }}
+								<span class="caret"></span>
+							</a>
 
 							<ul class="dropdown-menu dropdown-menu-right" role="menu">
 								<li class="nav-item">
@@ -154,6 +157,34 @@
 					{% else %}
 						<li><a class="nav-link" href="{{ url_for('users.login') }}">{{ _("Sign in") }}</a></li>
 					{% endif %}
+
+					<li class="nav-item dropdown">
+						<a class="nav-link dropdown-toggle"
+								data-toggle="dropdown"
+								role="button"
+								aria-expanded="false">
+							<i class="fas fa-language"></i>
+						</a>
+							<ul class="dropdown-menu dropdown-menu-right" role="menu">
+								<li class="nav-item">
+									<form method="POST" action="{{ url_for('set_locale') }}">
+										<input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
+										<input type="hidden" name="locale" value="en" />
+										<input type="hidden" name="r" value="{{ url_set_query() }}" />
+										<input type="submit" class="btn btn-link nav-link" value="English (en)">
+									</form>
+								</li>
+								<li>
+									<form method="POST" action="{{ url_for('set_locale') }}">
+										<input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
+										<input type="hidden" name="locale" value="fr" />
+										<input type="hidden" name="r" value="{{ url_set_query() }}" />
+										<input type="submit" class="btn btn-link nav-link" value="Français (fr)">
+									</form>
+								</li>
+							</ul>
+						</form>
+					</li>
 				</ul>
 			</div>
 		</div>