feature #14378 [DX] Added a logout link in the security panel of the web debug toolbar (javiereguiluz)

This PR was squashed before being merged into the 2.8 branch (closes #14378).

Discussion
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[DX] Added a logout link in the security panel of the web debug toolbar

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

While developing applications, it's common to login/logout users continuously to test security features. I usually type `/logout` in the URL, but this is boring and, depending on the application, not always works.

This PR adds a small *Logout* link in the security panel when you are logged in the application:

![logged](https://cloud.githubusercontent.com/assets/73419/7184976/6c66831a-e460-11e4-86a9-eb5a48c9aa4c.png)

Anonymous users won't see anything:

![anonymous](https://cloud.githubusercontent.com/assets/73419/7184982/74a95b60-e460-11e4-8b35-72d8336355fb.png)

Commits
-------

192523a [DX] Added a logout link in the security panel of the web debug toolbar

Author: fabpot

DataCollector/SecurityDataCollector.php

@@ -50,6 +50,7 @@ public function collect(Request $request, Response $response, \Exception $except
                 'enabled' => false,
                 'authenticated' => false,
                 'token_class' => null,
+                'provider_key' => null,
                 'user' => '',
                 'roles' => array(),
                 'inherited_roles' => array(),
@@ -60,6 +61,7 @@ public function collect(Request $request, Response $response, \Exception $except
                 'enabled' => true,
                 'authenticated' => false,
                 'token_class' => null,
+                'provider_key' => null,
                 'user' => '',
                 'roles' => array(),
                 'inherited_roles' => array(),
@@ -80,6 +82,7 @@ public function collect(Request $request, Response $response, \Exception $except
                 'enabled' => true,
                 'authenticated' => $token->isAuthenticated(),
                 'token_class' => get_class($token),
+                'provider_key' => method_exists($token, 'getProviderKey') ? $token->getProviderKey() : null,
                 'user' => $token->getUsername(),
                 'roles' => array_map(function (RoleInterface $role) { return $role->getRole();}, $assignedRoles),
                 'inherited_roles' => array_map(function (RoleInterface $role) { return $role->getRole(); }, $inheritedRoles),
@@ -159,6 +162,16 @@ public function getTokenClass()
         return $this->data['token_class'];
     }
 
+    /**
+     * Get the provider key (i.e. the name of the active firewall).
+     *
+     * @return string The provider key
+     */
+    public function getProviderKey()
+    {
+        return $this->data['provider_key'];
+    }
+
     /**
      * {@inheritdoc}
      */

Resources/views/Collector/security.html.twig

@@ -33,6 +33,12 @@
                 <span>{{ collector.tokenClass|abbr_class }}</span>
             </div>
             {% endif %}
+            {% if collector.providerKey %}
+            <div class="sf-toolbar-info-piece">
+                <b>Actions</b>
+                <span><a href="{{ logout_path(collector.providerKey) }}">Logout</a></span>
+            </div>
+            {% endif %}
         {% elseif collector.enabled %}
             <div class="sf-toolbar-info-piece">
                 <span>You are not authenticated.</span>