Support custom JSON-schema extensions

[bcherny]

No description provided.

[monolithed]

@bcherny, is there any way to convert a JSON object as is?

I mean:

let json = {
   "x": 0
}

convert('Foo', json);

interface Foo {
   x: number
}

[bcherny]

That is outside of jstt's responsibility, though you can probably use something like https://www.npmjs.com/package/generate-schema, and pipe its output into jstt.

[monolithed]

@bcherny, thanks!

[TheLarkInn]

I spent a bit of time looking at how the parser works, and was curious how you might imagine a plugin system? Would this be as granular as supporting custom JSONTypes?

[bcherny]

@TheLarkInn Sorry about the delayed response. If you want a plugin system that can add support for/override handling of a particular JSONSchema node type, you'd have to add support for that node type at a few layers:

• Adding an AST node type
• Adding it to the JSON-Schema type
• Adding it as the first case in the big parser switch
• Adding it to the validator, normalizer, generator, and optimizer

A question to start with might be: does a typical plugin need to hook into all of these steps? If not, we might want to go more granular.

I'd start by putting together a few use cases for JSON-Schema-to-TypeScript plugins. Then we can think through how to design the API (visitor pattern, or otherwise), and sketch out how the types would work to enforce compile time safety for plugins.