SWF-Editor: Error Handling, parser and validation

[handreyrc]

Summary

The goal of this task is to povide means to gather and consolidate SWF content errors in a single place. It should be possible to verify if there are errors coming from the marshaller / parser (content to model) and if there are rules violation before the workflow is rendered / reloaded.

Description

• Create a component to gather marshaller / parser and rule validation errors in a way the errors can be verified and recovered before the workflow is rendered
• If it is the first time the content is being loaded and there are errors the workflow shouldnt be rendered, an error page shall be presented instead
• If the workflow was valid before and the same workflow content is set with errors, the valid version of the worflow shall remain on the screen
• Update storybook to contain workflow samples of the same workflow content, one valid and other with errors

Testing

• Run the component and load an invalid workflow from storybook so the error page shall be presented instead.
• Run the component and load a valid workflow from storybook then open the same workflow content with errors and check if the last valid workflow view is still visible.