[mod] move group_engines_in_tab to searx.webutils

searx/webutils.py

@@ -5,11 +5,13 @@ import hashlib
 import hmac
 import re
 import inspect
+import itertools
 
 from io import StringIO
 from codecs import getincrementalencoder
 
-from searx import logger
+from searx import logger, settings
+from searx.engines import OTHER_CATEGORY
 
 
 VALID_LANGUAGE_CODE = re.compile(r'^[a-z]{2,3}(-[a-zA-Z]{2})?$')
@@ -134,3 +136,26 @@ def is_flask_run_cmdline():
     if len(frames) < 2:
         return False
     return frames[-2].filename.endswith('flask/cli.py')
+
+
+DEFAULT_GROUP_NAME = 'others'
+
+
+def group_engines_in_tab(engines):
+    def engine_sort_key(engine):
+        return (engine.about.get('language', ''), engine.name)
+
+    def group_sort_key(group):
+        return (group[0] == DEFAULT_GROUP_NAME, group[0].lower())
+
+    def get_group(eng):
+        non_tab_engines = [c for c in eng.categories if c not in settings['categories_as_tabs'] + [OTHER_CATEGORY]]
+        return non_tab_engines[0] if len(non_tab_engines) > 0 else DEFAULT_GROUP_NAME
+
+    return [
+        (groupname, sorted(engines, key=engine_sort_key))
+        for groupname, engines in sorted(
+            ((name, list(engines)) for name, engines in itertools.groupby(sorted(engines, key=get_group), get_group)),
+            key=group_sort_key,
+        )
+    ]