From 8fc4b8156affc9e7f00db0988ccd627b3eaae8a7 Mon Sep 17 00:00:00 2001
From: a01200356 <a01200356@itesm.mx>
Date: Fri, 3 Jun 2016 00:14:23 -0500
Subject: [PATCH] [fix] multilingual duckduckgo

only works if both country and language are set
---
 searx/engines/duckduckgo.py           | 21 ++++++++++++++-------
 tests/unit/engines/test_duckduckgo.py |  8 ++------
 2 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/searx/engines/duckduckgo.py b/searx/engines/duckduckgo.py
index 373ce1b2d..714c27228 100644
--- a/searx/engines/duckduckgo.py
+++ b/searx/engines/duckduckgo.py
@@ -11,8 +11,6 @@
  @parse       url, title, content
 
  @todo        rewrite to api
- @todo        language support
-              (the current used site does not support language-change)
 """
 
 from urllib import urlencode
@@ -39,13 +37,22 @@ def request(query, params):
     offset = (params['pageno'] - 1) * 30
 
     if params['language'] == 'all':
-        locale = 'en-us'
+        locale = None
     else:
-        locale = params['language'].replace('_', '-').lower()
+        locale = params['language'].split('_')
+        if len(locale) == 2:
+            # country code goes first
+            locale = locale[1].lower() + '-' + locale[0].lower()
+        else:
+            # doesn't actually do anything because ddg requires both country and language
+            locale = locale[0].lower()
 
-    params['url'] = url.format(
-        query=urlencode({'q': query, 'kl': locale}),
-        offset=offset)
+    if locale:
+        params['url'] = url.format(
+            query=urlencode({'q': query, 'kl': locale}), offset=offset)
+    else:
+        params['url'] = url.format(
+            query=urlencode({'q': query}), offset=offset)
 
     return params
 
diff --git a/tests/unit/engines/test_duckduckgo.py b/tests/unit/engines/test_duckduckgo.py
index 8f99dc9cb..90cdc9d9e 100644
--- a/tests/unit/engines/test_duckduckgo.py
+++ b/tests/unit/engines/test_duckduckgo.py
@@ -11,16 +11,12 @@ class TestDuckduckgoEngine(SearxTestCase):
         query = 'test_query'
         dicto = defaultdict(dict)
         dicto['pageno'] = 1
-        dicto['language'] = 'fr_FR'
+        dicto['language'] = 'de_CH'
         params = duckduckgo.request(query, dicto)
         self.assertIn('url', params)
         self.assertIn(query, params['url'])
         self.assertIn('duckduckgo.com', params['url'])
-        self.assertIn('fr-fr', params['url'])
-
-        dicto['language'] = 'all'
-        params = duckduckgo.request(query, dicto)
-        self.assertIn('en-us', params['url'])
+        self.assertIn('ch-de', params['url'])
 
     def test_response(self):
         self.assertRaises(AttributeError, duckduckgo.response, None)