Custom Workflows

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Custom Workflows
Write advanced workflows with scripting
Custom workflows have been already requested several times and have implemented it 2019, but if you are using an older version this guide will teach you how to implement custom workflows with permissions and scripting.
If you are up to date with your Squidex version you can go to the documentation about workflows.
Workflows
Our requirements
In our scenario we manage articles and have three roles:
1.Creators: Writes articles and when they are done they mark an article as Ready.
2.Reviewers: Reviews articles and either mark an article as Approved or Rejected.
3.Publisher: Decides when to publish an article and should only publish approved articles.
Therefore we have 3 states for content:
1.Draft
2.Ready
3.Approved
4.Rejected
5.Published
The following diagram visualizes our workflow.
Workflow
Step 1: Create the schema
In the first step we create a schema. We keep it simple and define 3 fields:
1.Title: The title of the article.
2.Status: The status of the article as string field with a dropdown editor.
3.Text: The text as markdown.
We will make set the first two fields as list fields, which means we will see them in our content lists.
In the content list the schema will look like this:
Articles
Now we can very easily see all articles and their status. But as a reviewer I am probably only interested in the articles that is ready to be reviewed.
We can search for these articles with the following query: $filter=data/status/iv eq 'Ready'
It looks a little bit like technical stuff and our reviewers should not care about this. But we can save the query and give it a friendly name so it can be reused.
Save Query
The basic setup is already done and it might work well enough in a small team. It requires a little bit of discipline and corporation of all team members. But if we have critical content like product texts or a big team where we don't want to rely that everybody has a good day we need some rules to enforce that our workflow is used correctly.
You can also use the new comments feature to share information between reviewer and writer:
Comments
Step 2: Enforce the workflow
We start by creating our Roles in Squidex:
Roles
As you can see in the screenshot above, the Creator can only create and update content, but not publish it and the Reviewer can only update content. we use the default role Editor for the Publisher.
So we solved the problem that only the Publisher should be able to publish, unpublish content, but there is still something left to do.
We have to ensure that:
1.The Creator must set the initial status to Draft.
2.The Creator can only change the status to Ready.
3.The Creator can only update an article when the status is Draft or Rejected.
4.The Reviewer can only change the status to Approved or Rejected.
5.The Publisher can only set the status to Published.
6.The Publisher can only publish the content when it the status is Published (to be consistent).
I will not show everything in this tutorial, it is just too much and the solution is the same for all roles, but we will show you how we implemented it for the Creator:
The solution is scripting. If you click the three dots in the schema editor a menu will pop up with a menu item to the scripting editor. Here you can define scripts that are invoked when a content item is queried, created, updated, deleted or when the status is changed.
Scripting
The create script:
The script for creating content is very simple:
// Check the status field is set to draft.
if (ctx.data.status.iv !== 'Draft') {
    // If not reject this operation with a custom validation message.
    reject('The status of a new article must be set to Draft');
}
That's it, we do not have to do more, because the permission system already enforces that only Creators can create content.
The UI will show the error message from the script:
Error Message
The update script:
Lets have a look to the update script:
// Our code for the Creator
if (ctx.user.claims.role.indexOf('Creator')) {
    // Check the old status of our content.
    if (ctx.oldData.status.iv !== 'Draft' && ctx.oldData.status.iv !== 'Rejected') {
        disallow('You are not allowed to edit content that has been published already.');
    }
​
    if (ctx.data.status.iv !== 'Draft' && ctx.data.status.iv !== 'Ready') {
        reject('You only set the status to Draft or Ready');
    }
}
What we do:
1.We check if the current user is a Creator.
2.If the content has the wrong status we cancel the process with the disallow function. Then the API responds with a HTTP 403: Forbidden and the UI will show an error message.
3.if the content is changed to an invalid status we cancel the update with the 'reject' function. Then the API response with a HTTP 400: Bad Request and the UI will show the error message.
The rest of the requirements can be implemented with a some more if-statements.
Summary
You can already implement custom workflow with Squidex, but this solutions has several small issues:
1.You have a second field for the status of the addition.
2.The user experience could be better.
3.You have to define, write and define the scripts.
But on the other side there are also some points on the PRO side:
1.You can implement very fine grained workflows and you are not restricted by a built-in solution.
2.You can even make the Status field localizable and ensure that all texts are reviewed from different person before you publish a content.
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Our requirements
Step 1: Create the schema
Step 2: Enforce the workflow
The create script:
The update script:
Summary