[enh] engine customisation init

searx/static/css/style.css

 
 input[type="checkbox"] { visibility: hidden; }
 
-fieldset { margin: 8px; }
+fieldset { margin: 8px; border: 1px solid #3498DB; }
 
 #categories { margin: 0 10px; }
 
 .checkbox_container input {
     display: none;
 }
-.checkbox_container label {
+.checkbox_container label, .engine_checkbox label {
     cursor: pointer;
     padding: 4px 10px;
     margin: 0;
 .search .checkbox_container label:hover { border-bottom: 4px solid #3498DB; }
 .search .checkbox_container input[type="checkbox"]:checked + label { border-bottom: 4px solid #2980B9; }
 
+.engine_checkbox { padding: 4px; }
+label.allow { background: #E74C3C; color: #FFFFFF; padding: 4px 8px; display: none; }
+label.deny { background: #2ECC71; padding: 4px 8px; display: inline; }
+.engine_checkbox input[type="checkbox"]:checked + label:nth-child(2) + label { display: none; }
+.engine_checkbox input[type="checkbox"]:checked + label.allow { display: inline; }
+
 a { text-decoration: none; color: #1a11be; }
 a:visited { color: #7b11be; }
 
 
 .percentage { position: relative; width: 300px; }
 .percentage div { background: #444444; }
-td { padding: 0 4px; }
-tr:hover td { background: #DDDDDD; }
+table { width: 100%; }
+td { padding: 0 4px;  }
+tr:hover { background: #DDDDDD; }
 
 #search_wrapper { position: relative; max-width: 600px; padding: 10px; }
 .center #search_wrapper { margin-left: auto; margin-right: auto; }

searx/templates/engines.html

-{% extends 'base.html' %}
-{% block content %}
-<div class="row">
-    <h2>{{ _('Currently used search engines') }}</h2>
-
-    <table style="width: 80%;">
-        <tr>
-            <th>{{ _('Engine name') }}</th>
-            <th>{{ _('Shortcut') }}</th>
-            <th>{{ _('Category') }}</th>
-        </tr>
-    {% for (categ,search_engines) in categs %}
-        {% for search_engine in search_engines %}
-
-            {% if not search_engine.private %}
-            <tr>
-                <td>{{ search_engine.name }}</td>
-                <td>{{ shortcuts[search_engine.name] }}</td>
-                <td>{{ _(categ) }}</td>
-            </tr>
-            {% endif %}
-        {% endfor %}
-    {% endfor %}
-    </table>
-<p class="right"><a href="/">{{ _('back') }}</a></p>
-</div>
-{% endblock %}

searx/templates/preferences.html

         </select>
         </p>
     </fieldset>
+    <fieldset>
+    <legend>{{ _('Currently used search engines') }}</legend>
+
+    <table>
+        <tr>
+            <th>{{ _('Engine name') }}</th>
+            <th>{{ _('Shortcut') }}</th>
+            <th>{{ _('Category') }}</th>
+            <th>{{ _('Allow') }} / {{ _('Deny') }}</th>
+        </tr>
+    {% for (categ,search_engines) in categs %}
+        {% for search_engine in search_engines %}
+
+            {% if not search_engine.private %}
+            <tr>
+                <td>{{ search_engine.name }}</td>
+                <td>{{ shortcuts[search_engine.name] }}</td>
+                <td>{{ _(categ) }}</td>
+                <td class="engine_checkbox">
+                    <input type="checkbox" id="engine_{{ categ}}_{{ search_engine.name|replace(' ', '_') }}" name="engine_{{ search_engine.name }}"{% if search_engine.name in blocked_engines %} checked="checked"{% endif %} />
+                    <label class="allow" for="engine_{{ categ }}_{{ search_engine.name|replace(' ', '_') }}">{{ _('Allow') }}</label>
+                    <label class="deny" for="engine_{{ categ }}_{{ search_engine.name|replace(' ', '_') }}">{{ _('Deny') }}</label>
+                </td>
+            </tr>
+            {% endif %}
+        {% endfor %}
+    {% endfor %}
+    </table>
+    </fieldset>
     <p class="small_font">{{ _('These settings are stored in your cookies, this allows us not to store this data about you.') }}
     <br />
     {{ _("These cookies serve your sole convenience, we don't use these cookies to track you.") }}

searx/tests/test_webapp.py

         self.assertEqual(result.status_code, 200)
         self.assertIn('<h1>About <a href="/">searx</a></h1>', result.data)
 
-    def test_engines(self):
-        result = self.app.get('/engines')
-        self.assertEqual(result.status_code, 200)
-        self.assertIn('<h2>Currently used search engines</h2>', result.data)
-
     def test_preferences(self):
         result = self.app.get('/preferences')
         self.assertEqual(result.status_code, 200)

searx/webapp.py

     return render('about.html')
 
 
-@app.route('/engines', methods=['GET'])
-def list_engines():
-    """Render engines page.
-
-    List of all supported engines.
-    """
-    return render('engines.html',
-                  categs=categories.items(),
-                  shortcuts={y: x for x, y in engine_shortcuts.items()})
-
-
 @app.route('/preferences', methods=['GET', 'POST'])
 def preferences():
     """Render preferences page.
        and request.cookies['language'] in (x[0] for x in language_codes):
         lang = request.cookies['language']
 
-    if request.method == 'POST':
+    blocked_engines = []
+
+    if request.method == 'GET':
+        blocked_engines = request.cookies.get('blocked_engines', '').split(',')
+    else:
         selected_categories = []
         locale = None
         for pd_name, pd in request.form.items():
             elif pd_name == 'language' and (pd == 'all' or
                                             pd in (x[0] for
                                                    x in language_codes)):
+                locale = pd
                 lang = pd
+            elif pd_name.startswith('engine_'):
+                engine_name = pd_name.replace('engine_', '', 1)
+                if engine_name in engines:
+                    blocked_engines.append(engine_name)
 
         resp = make_response(redirect('/'))
 
+        user_blocked_engines = request.cookies.get('blocked_engines', '').split(',') # noqa
+
+        if sorted(blocked_engines) != sorted(user_blocked_engines):
+            # cookie max age: 4 weeks
+            resp.set_cookie(
+                'blocked_engines', ','.join(blocked_engines),
+                max_age=60 * 60 * 24 * 7 * 4
+            )
+
         if locale:
             # cookie max age: 4 weeks
             resp.set_cookie(
                   locales=settings['locales'],
                   current_locale=get_locale(),
                   current_language=lang or 'all',
-                  language_codes=language_codes)
+                  language_codes=language_codes,
+                  categs=categories.items(),
+                  blocked_engines=blocked_engines,
+                  shortcuts={y: x for x, y in engine_shortcuts.items()})
 
 
 @app.route('/stats', methods=['GET'])