[enh] XPath engine - add time safe-search support

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/xpath.py

@@ -5,39 +5,9 @@ from urllib.parse import urlencode
 from searx.utils import extract_text, extract_url, eval_xpath, eval_xpath_list
 
 search_url = None
-<<<<<<< HEAD
-=======
-"""
-Search URL of the engine, replacements are:
-
-``{query}``:
-  Search terms from user.
-
-``{pageno}``:
-  Page number if engine supports pagging :py:obj:`paging`
-
-``{lang}``:
-  ISO 639-1 language code (en, de, fr ..)
-
-``{time_range}``:
-  :py:obj:`URL parameter <time_range_url>` if engine :py:obj:`supports time
-  range <time_range_support>`.  The value for the parameter is taken from
-  :py:obj:`time_range_map`.
-
-"""
 
 lang_all='en'
-'''Replacement ``{lang}`` in :py:obj:`search_url` if language ``all`` is
-selected.
-'''
 
-soft_max_redirects = 0
-'''Maximum redirects, soft limit. Record an error but don't stop the engine'''
-
-results_xpath = ''
-'''XPath selector for the list of result items'''
-
->>>>>>> 6bfe3fd0 ([enh] XPath engine - add time range support)
 url_xpath = None
 content_xpath = None
 title_xpath = None
@@ -93,6 +63,26 @@ time_range_map = {
       year: 365
 '''
 
+safe_search_support = False
+'''Engine supports safe-search.'''
+
+safe_search_map = {
+    0: '&filter=none',
+    1: '&filter=moderate',
+    2: '&filter=strict'
+}
+'''Maps safe-search value to ``{safe_search}`` in :py:obj:`search_url`.
+
+.. code:: yaml
+
+    safesearch: true
+    safes_search_map:
+      0: '&filter=none'
+      1: '&filter=moderate'
+      2: '&filter=strict'
+
+'''
+
 def request(query, params):
     query = urlencode({'q': query})[2:]
 
@@ -114,12 +104,16 @@ def request(query, params):
         time_range_val = time_range_map.get(params.get('time_range'))
         time_range = time_range_url.format(time_range_val=time_range_val)
 
+    safe_search = ''
+    if params['safesearch']:
+        safe_search = safe_search_map[params['safesearch']]
+
     fargs = {
         'query': urlencode({'q': query})[2:],
         'lang': lang,
         'pageno': (params['pageno'] - 1) * page_size + first_page_num,
-        'time_range': time_range,
-        'safe_search': safe_search,
+        'time_range' : time_range,
+        'safe_search' : safe_search,
     }
 
     params['cookies'].update(cookies)