[fix] Result text in Wolfram|Alpha (#607)

searx/engines/wolframalpha_api.py

 input_xpath = '//pod[starts-with(attribute::id, "Input")]/subpod/plaintext'
 pods_xpath = '//pod'
 subpods_xpath = './subpod'
+pod_primary_xpath = './@primary'
 pod_id_xpath = './@id'
 pod_title_xpath = './@title'
 plaintext_xpath = './plaintext'
         infobox_title = None
 
     pods = search_results.xpath(pods_xpath)
+    result = ""
     result_chunks = []
     for pod in pods:
         pod_id = pod.xpath(pod_id_xpath)[0]
         pod_title = pod.xpath(pod_title_xpath)[0]
+        pod_is_result = pod.xpath(pod_primary_xpath)
 
         subpods = pod.xpath(subpods_xpath)
         if not subpods:
 
             if content and pod_id not in image_pods:
 
+                if pod_is_result:
+                    result = content
+
                 # if no input pod was found, title is first plaintext pod
                 if not infobox_title:
                     infobox_title = content
 
     # append link to site
     results.append({'url': resp.request.headers['Referer'].decode('utf8'),
-                    'title': 'Wolfram|Alpha',
-                    'content': infobox_title})
+                    'title': infobox_title + ' - Wolfram|Alpha',
+                    'content': result})
 
     return results

searx/engines/wolframalpha_noapi.py

     # TODO handle resp_json['queryresult']['assumptions']
     result_chunks = []
     infobox_title = None
+    result = ""
     for pod in resp_json['queryresult']['pods']:
         pod_id = pod.get('id', '')
         pod_title = pod.get('title', '')
+        pod_is_result = pod.get('primary', None)
 
         if 'subpods' not in pod:
             continue
                 if subpod['plaintext'] != '(requires interactivity)':
                     result_chunks.append({'label': pod_title, 'value': subpod['plaintext']})
 
+                if pod_is_result:
+                    result = subpod['plaintext']
+
             elif 'img' in subpod:
                 result_chunks.append({'label': pod_title, 'image': subpod['img']})
 
                     'urls': [{'title': 'Wolfram|Alpha', 'url': resp.request.headers['Referer'].decode('utf8')}]})
 
     results.append({'url': resp.request.headers['Referer'].decode('utf8'),
-                    'title': 'Wolfram|Alpha',
-                    'content': infobox_title})
+                    'title': infobox_title + ' - Wolfram|Alpha',
+                    'content': result})
 
     return results

tests/unit/engines/test_wolframalpha_api.py

         self.assertEqual(referer_url, results[0]['urls'][0]['url'])
         self.assertEqual('Wolfram|Alpha', results[0]['urls'][0]['title'])
         self.assertEqual(referer_url, results[1]['url'])
-        self.assertEqual('Wolfram|Alpha', results[1]['title'])
+        self.assertEqual('input_plaintext - Wolfram|Alpha', results[1]['title'])
+        self.assertIn('result_plaintext', results[1]['content'])
 
         # test calc
         xml = """<?xml version='1.0' encoding='UTF-8'?>
         self.assertEqual(referer_url, results[0]['urls'][0]['url'])
         self.assertEqual('Wolfram|Alpha', results[0]['urls'][0]['title'])
         self.assertEqual(referer_url, results[1]['url'])
-        self.assertEqual('Wolfram|Alpha', results[1]['title'])
+        self.assertEqual('integral_plaintext - Wolfram|Alpha', results[1]['title'])
+        self.assertIn('integral_plaintext', results[1]['content'])

tests/unit/engines/test_wolframalpha_noapi.py

         self.assertEqual(referer_url, results[0]['urls'][0]['url'])
         self.assertEqual('Wolfram|Alpha', results[0]['urls'][0]['title'])
         self.assertEqual(referer_url, results[1]['url'])
-        self.assertEqual('Wolfram|Alpha', results[1]['title'])
+        self.assertEqual('input_plaintext - Wolfram|Alpha', results[1]['title'])
+        self.assertIn('result_plaintext', results[1]['content'])
 
         # test calc
         json = r"""
         self.assertEqual(referer_url, results[0]['urls'][0]['url'])
         self.assertEqual('Wolfram|Alpha', results[0]['urls'][0]['title'])
         self.assertEqual(referer_url, results[1]['url'])
-        self.assertEqual('Wolfram|Alpha', results[1]['title'])
+        self.assertEqual('integral_plaintext - Wolfram|Alpha', results[1]['title'])
+        self.assertIn('integral_plaintext', results[1]['content'])