[feature] SCXML import?

[aksonov]

Could I pass SCXML file to xstate?

[davidkpiano]

In the future, you will be able to. It will likely be in an @xstate/scxml package.

[aksonov]

@davidkpiano Thank you for your work. I started something similar three years ago (SCXML-based): https://github.com/aksonov/statem but didn't found any community interest...

I'm maintaining RNRF component (https://github.com/aksonov/react-native-router-flux) and want to integrate it with xstate to make app navigation independent from UI layer.

One issue I was not able to solve three years ago - how to support stacks with SCXML (typical push/pop operations)? Looks like it is not supported there...

[davidkpiano]

Do you mean simulating pushdown automata or simply maintaining a stack?

You can use a combination of context, assign(...), and cond: ... (<data>, <assign>, and <transition cond="..."> to simulate it, I believe.

[aksonov]

You can use a combination of context, assign(...), and cond: ... (, , and to simulate it, I believe.

@davvidbaker Could you clarify? I want to use state machine for app navigation. For example, from Home account, user may go to own User Profile and to Friends List. From Friends List user may go to other's User Profile pages. The question how to implement 'pop' operation for User Profile, that should go to previous state from the stack (Home OR Friends List)

[aksonov]

More interesting situation will be if User Profile also contains user's "Friends List" tab. Then we could have indefinite sequence User Profile -> Friends List -> User Profile -> etc.

[kalutheo]

hey ! great work ! any news about this feature ?

[sarimarton]

I'm also pretty interested in this feature. I find PUG as the most legible format for SCs, JSON/YAML is too verbose vertically, XML is also noisy with the closing tags. PUG would perfect, but it turns into XML, so we need xml import :)

[Andarist]

Conversion is partially supported by https://github.com/davidkpiano/xstate/blob/master/src/scxml.ts , it ain't 100% ready yet though - so stay tuned.