Provide computed field properties and tokens

What do site builders need?
I'm building this module for the intranet if someone wants to save an article from another site then they just copy the link.
and another use for chat box when you copy a link to chat box it will call the module to get the thumbnail (title, image, summary).
You have a service to parse content, why do you need a hook?
What ECA plays for this module, I really don't understand

Computed field properties and tokens could be used in views, or to fill in entity field values on save (or ideally after pasting the link).

Where are you pasting the link? In a field, or wysiwyg? How do you process/display the link title and content after that?

I'm not asking for a hook, I was saying that I could write a form alter hook to add a form submit function where I can do what I want.

What my idea is, would be to provide a few utilities so that instead of having to do things in code, they could be configured in the interface.

An ECA extension would allow us to use the endpoint while processing a link in some pipeline.

• Create link fields
• In widget select Postlight parser (PHP readability is default)
• Map yours field to get extracted content