From 449f1d5765ffffcf2c708f4ccf6278e9c79081d0 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 11 Oct 2020 15:40:39 +0200
Subject: improve i18n for survey

---
 talermerchantdemos/httpcommon/__init__.py | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

(limited to 'talermerchantdemos/httpcommon')

diff --git a/talermerchantdemos/httpcommon/__init__.py b/talermerchantdemos/httpcommon/__init__.py
index d07fe69..650228d 100644
--- a/talermerchantdemos/httpcommon/__init__.py
+++ b/talermerchantdemos/httpcommon/__init__.py
@@ -4,7 +4,7 @@ from urllib.parse import urljoin
 from flask import request
 from datetime import datetime
 import time
-
+from flask_babel import gettext
 
 ##
 # Return a error response to the client.
@@ -32,19 +32,19 @@ def backend_post(backend_url, endpoint, json):
             final_url, json=json, headers=headers
         )
     except requests.ConnectionError:
-        err_abort(500, message="Could not establish connection to backend")
+        err_abort(500, message=gettext("Could not establish connection to backend"))
     try:
         response_json = resp.json()
     except ValueError:
         err_abort(
             500,
-            message="Could not parse response from backend",
+            message=gettext("Could not parse response from backend"),
             status_code=resp.status_code
         )
     if resp.status_code != 200:
         err_abort(
             500,
-            message="Backend returned error status",
+            message=gettext("Backend returned error status"),
             json=response_json,
             status_code=resp.status_code
         )
@@ -68,21 +68,29 @@ def backend_get(backend_url, endpoint, params):
             final_url, params=params, headers=headers
         )
     except requests.ConnectionError:
-        err_abort(500, message="Could not establish connection to backend")
+        err_abort(500, message=gettext("Could not establish connection to backend"))
     try:
         response_json = resp.json()
     except ValueError:
-        err_abort(500, message="Could not parse response from backend")
+        err_abort(500, message=gettext("Could not parse response from backend"))
     if resp.status_code != 200:
         err_abort(
             500,
-            message="Backend returned error status",
+            message=gettext("Backend returned error status"),
             json=response_json,
             status_code=resp.status_code
         )
     print("Backend responds to {}: {}".format(final_url, str(response_json)))
     return response_json
 
+def get_locale():
+    parts = request.path.split('/', 2)
+    if (2 >= len(parts)):
+        # Totally unexpected path format, do not localize
+        return "en"
+    lang = parts[1]
+    return lang
+
 ##
 # Helper function used inside Jinja2 logic to create a links
 # to the current page but in a different language. Used to
@@ -107,7 +115,11 @@ def self_localized(lang):
 # @param abort_status_code status code to return along the response.
 # @param params _kw_ arguments to passed verbatim to the templating engine.
 def err_abort(abort_status_code, **params):
-    t = flask.render_template("templates/error.html.j2", **params)
+    t = flask.render_template(
+        "templates/error.html.j2",
+        lang=get_locale(),
+        **params
+    )
     flask.abort(flask.make_response(t, abort_status_code))
 
 
-- 
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