To allow for full customizability at every step of LinkSheet's link processing backend, all steps need to be split up into well-defined operations which operate on an input, then produce some sort of output.

The refactor of the processing backend, dubbed "LinkEngine", will consist of the following well-defined components:

Actors

Modifiers

A Modifier applies pre-defined modifications to a given url

• Embed rewriter
• ClearURLs
• FastForward
• LibRedirect

Resolvers

A Resolver applies modifications to a url based on information which is acquired
at runtime, rather than being pre-defined

• Follow redirects
• Amp2Html

Fetchers

A fetcher gathers information about a link to provide either further functionality
or information to the user

• Download
• Open graph preview

Presenters

A presenter uses the given link to present some sort of user-visible result

• Open an app directly
• Show bottom sheet

Bottom sheet

Action

Opens the user selected app

• Once
• Always
• Incognito

Context action

A context action allows the user to use the result in a way which does not directly open an app
like the "Once" or "Always" buttons do

• Copy link
• Share link
• Download
• Ignore LibRedirect