Unlike TypeScript, Dart can't simply apply an Interface to incoming data, like JSON, and have it "just work." (Which is a huge bummer, and makes functional programming harder)

Because of this and other language design choices, handling async data and requests, especially multiple requests, with xstate in dart, will be more difficult than it already is in TypeScript.

Packages like built_value, and built_collection, come with json serialization built in.

They also have a lot of other features that would be great if inherited by xstate.

I'm asking if there is a way to link xstate with these two other packages, and use code_gen to do so?

If xstate wants to widely be used in Dart, code generation may be necessary, and json serialization should be made as easy as possible.

mobx makes use of code_gen to make development super easy.

There are lots of benefits to using code_gen, built_value, and built_collection in projects, so I thought I'd suggest them.

Let me know if you'd need help of are excepting pull requests.

Hello,
It looks like this project has be quiet for 2 years. Any plans to restart work in 2022?

Machine Definition

Defining https://www.w3.org/2011/04/SCXML/scxml.xsd with dart models.

Translation

Convert a machine that user provides to the machine definition format.

• machine.fromJson : xstatejs format
• machine.fromSCXML: scxml format

Interpreter

An interpreter takes one Machine Definition (required), one Initial State and zero or more hooks and returns a Machine Instance.

Hooks

hook to an internal event of the interpreter. (onRaiseError, onStateChanged, ... )

Machine Instance

provides these properties:

• Stream<State> state: current state of the machine
  • State :
    • value: current state value
    • matches(State pattern): check if the state matches a pattern
    • context
• void send(Event event): sends event to the machine

Flutter

• Basic binding for flutter
• Provide a simple example

Basic Tooling

• Machine definition validation & auto completion
  • provide schema validation for Machine.fromJson with https://github.com/davidkpiano/xstate/pull/960/files#diff-573778b9503823ca0d77478e05c11054
  • provide validation for Machine.fromSCXML with https://www.w3.org/2011/04/SCXML/scxml.xsd
  • provide auto completion for target transition states
  • provide error for invalid or impossible transitions
• state.matches() validation & auto completion
  • provides all possible patterns for the machine.
  • provide errors for invalid pattern
• state.context suggestion and type validation