Updated the Workflow articles to Symfony 4

Author: javiereguiluz

workflow.rst

@@ -41,10 +41,14 @@ By defining a workflow like this, there is an overview how the process looks lik
 logic is not mixed with the controllers, models or view. The order of the steps can be changed
 by changing the configuration only.
 
+Learn more
+----------
+
 .. toctree::
    :maxdepth: 1
-   :glob:
 
-   workflow/*
+   workflow/usage
+   workflow/state-machines
+   workflow/dumping-workflows
 
 .. _Petri nets: https://en.wikipedia.org/wiki/Petri_net

workflow/dumping-workflows.rst

@@ -4,8 +4,8 @@
 How to Dump Workflows
 =====================
 
-To help you debug your workflows, you can dump a representation of your workflow with
-the use of a ``DumperInterface``. Use the ``GraphvizDumper`` to create a
+To help you debug your workflows, you can dump a representation of your workflow
+with the use of a ``DumperInterface``. Use the ``GraphvizDumper`` to create a
 PNG image of the workflow defined above::
 
     // dump-graph.php
@@ -20,8 +20,8 @@ The result will look like this:
 
 .. image:: /_images/components/workflow/blogpost.png
 
-If you have configured your workflow with the Symfony framework, you may dump the dot file
-with the ``WorkflowDumpCommand``:
+Inside a Symfony application with both Workflow and Console support, you can
+dump the dot file with the ``workflow:dump`` command:
 
 .. code-block:: terminal
 

workflow/state-machines.rst

@@ -28,7 +28,7 @@ Below is the configuration for the pull request state machine.
 
     .. code-block:: yaml
 
-        # app/config/config.yml
+        # config/packages/workflow.yaml
         framework:
             workflows:
                 pull_request:
@@ -67,7 +67,7 @@ Below is the configuration for the pull request state machine.
 
     .. code-block:: xml
 
-        <!-- app/config/config.xml -->
+        <!-- # config/packages/workflow.xml -->
         <?xml version="1.0" encoding="utf-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -140,8 +140,7 @@ Below is the configuration for the pull request state machine.
 
     .. code-block:: php
 
-        // app/config/config.php
-
+        // # config/packages/workflow.php
         $container->loadFromExtension('framework', array(
             // ...
             'workflows' => array(
@@ -190,8 +189,23 @@ Below is the configuration for the pull request state machine.
             ),
         ));
 
-You can now use this state machine by getting the ``state_machine.pull_request`` service::
+In a Symfony application using the
+:ref:`default services.yaml configuration <service-container-services-load-example>`,
+you can get this state machine by injecting the Workflow registry service::
+
+    // ...
+    use Symfony\Component\Workflow\Registry;
+
+    class SomeService
+    {
+        private $stateMachine;
+
+        public function __constructor(Registry $workflows)
+        {
+            $this->stateMachine = $workflows->get('pull_request');
+        }
 
-    $stateMachine = $this->container->get('state_machine.pull_request');
+        // ...
+    }
 
 .. _Petri net: https://en.wikipedia.org/wiki/Petri_net

workflow/usage.rst

@@ -1,8 +1,15 @@
 .. index::
     single: Workflow; Usage
 
-How to Use the Workflow
-=======================
+How to Create and Use Workflows
+===============================
+
+Before creating your first workflow, execute this command to install the
+:doc:`Workflow component </components/workflow>` in your application:
+
+.. code-block:: terminal
+
+    $ composer require workflow
 
 A workflow is a process or a lifecycle that your objects go through. Each
 step or stage in the process is called a *place*. You do also define *transitions*
@@ -14,15 +21,15 @@ A set of places and transitions creates a **definition**. A workflow needs
 a ``Definition`` and a way to write the states to the objects (i.e. an
 instance of a :class:`Symfony\\Component\\Workflow\\MarkingStore\\MarkingStoreInterface`.)
 
-Consider the following example for a blog post. A post can have places:
-'draft', 'review', 'rejected', 'published'. You can define the workflow
+Consider the following example for a blog post that can have these places:
+``draft``, ``review``, ``rejected``, ``published``. You can define the workflow
 like this:
 
 .. configuration-block::
 
     .. code-block:: yaml
 
-        # app/config/config.yml
+        # config/packages/workflow.yaml
         framework:
             workflows:
                 blog_publishing:
@@ -51,7 +58,7 @@ like this:
 
     .. code-block:: xml
 
-        <!-- app/config/config.xml -->
+        <!-- config/packages/workflow.xml -->
         <?xml version="1.0" encoding="utf-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -98,7 +105,7 @@ like this:
 
     .. code-block:: php
 
-        // app/config/config.php
+        // config/packages/workflow.php
 
         $container->loadFromExtension('framework', array(
             // ...
@@ -152,28 +159,43 @@ like this:
 
 .. tip::
 
-    The ``type`` (default value ``single_state``) and ``arguments`` (default value ``marking``)
-    attributes of the ``marking_store`` option are optional. If omitted, their default values
-    will be used.
+    The ``type`` (default value ``single_state``) and ``arguments`` (default
+    value ``marking``) attributes of the ``marking_store`` option are optional.
+    If omitted, their default values will be used.
 
-With this workflow named ``blog_publishing``, you can get help to decide
-what actions are allowed on a blog post::
+With this workflow named ``blog_publishing``, you can now decide what actions
+are allowed on a blog post. For example, inside a controller of an application
+using the :ref:`default services.yaml configuration <service-container-services-load-example>`,
+you can get the workflow by injecting the Workflow registry service::
 
-    $post = new \App\Entity\BlogPost();
+    // ...
+    use Symfony\Component\Workflow\Registry;
 
-    $workflow = $this->container->get('workflow.blog_publishing');
-    $workflow->can($post, 'publish'); // False
-    $workflow->can($post, 'to_review'); // True
+    class BlogController
+    {
+        public function edit(Registry $workflows)
+        {
+            $post = new \App\Entity\BlogPost();
+            $workflow = $workflows->get($post);
 
-    // Update the currentState on the post
-    try {
-        $workflow->apply($post, 'to_review');
-    } catch (LogicException $e) {
-        // ...
-    }
+            // if there are multiple workflows for the same class,
+            // pass the workflow name as the second argument
+            // $workflow = $workflows->get($post, 'blog_publishing');
 
-    // See all the available transition for the post in the current state
-    $transitions = $workflow->getEnabledTransitions($post);
+            $workflow->can($post, 'publish'); // False
+            $workflow->can($post, 'to_review'); // True
+
+            // Update the currentState on the post
+            try {
+                $workflow->apply($post, 'to_review');
+            } catch (LogicException $e) {
+                // ...
+            }
+
+            // See all the available transition for the post in the current state
+            $transitions = $workflow->getEnabledTransitions($post);
+        }
+    }
 
 Using Events
 ------------
@@ -250,7 +272,8 @@ order:
     * ``workflow.[workflow name].announce``
     * ``workflow.[workflow name].announce.[transition name]``
 
-Here is an example how to enable logging for every time a the "blog_publishing" workflow leaves a place::
+Here is an example how to enable logging for every time the ``blog_publishing``
+workflow leaves a place::
 
     use Psr\Log\LoggerInterface;
     use Symfony\Component\EventDispatcher\EventSubscriberInterface;