Added ddg-style !bang-operators

This is a proof of concept! The code works, but uses hardcoded operators
and may be placed in the wrong file/class.
The best-case scenario would be the possibility to use the 13.000+ ddg
operators, but I don't know if that's possible without having to
redirect to duckduckgo first.

app/routes.py

@@ -144,6 +144,10 @@ def search():
     search_util = RoutingUtils(request, g.user_config, session, cookies_disabled=g.cookies_disabled)
     query = search_util.new_search_query()
 
+    resolved_bangs = search_util.bang_operator()
+    if resolved_bangs != '':
+        return redirect(resolved_bangs)
+
     # Redirect to home if invalid/blank search
     if not query:
         return redirect('/')

app/utils/routing_utils.py

@@ -17,6 +17,14 @@ class RoutingUtils:
         self.query = ''
         self.cookies_disabled = cookies_disabled
         self.search_type = self.request_params.get('tbm') if 'tbm' in self.request_params else ''
+        self.bang_operators = {
+            '!gh': 'https://github.com/search?q=',
+            '!ddg': 'https://duckduckgo.com/?q=',
+            '!w': 'https://wikipedia.com/wiki/',
+            '!so': 'https://stackoverflow.com/search?q=',
+            '!a': 'https://amazon.com/s?k=',
+            '!ebay': 'https://ebay.com/sch/i.html?_nkw=',
+        }
 
     def __getitem__(self, name):
         return getattr(self, name)
@@ -55,6 +63,15 @@ class RoutingUtils:
         self.query = q[2:] if self.feeling_lucky else q
         return self.query
 
+
+    def bang_operator(self) -> str:
+        print(self.query)
+        for operator, url in self.bang_operators.items():
+            if operator in self.query:
+                return url + self.query.replace(operator, '').strip()
+        return ''
+
+
     def generate_response(self) -> Tuple[Any, int]:
         mobile = 'Android' in self.user_agent or 'iPhone' in self.user_agent