Difference between arrays custom keyword

[domnantas]

What version of Ajv you are you using? v8.11.0

What problem do you want to solve? I'm not suggesting to add this keyword to Ajv, just looking for guidance I'm trying to implement a custom keyword that checks whether array contains the same strings, as a referenced object keys. I have read the docs, codegen.spec (it's really good), but I'm still strugging to understand how to implement such functionality using codegen

Here's a repo: https://github.com/domnantas/ajv-playground Here's replit: https://replit.com/github/domnantas/ajv-playground

Here's what I'm trying to do

{
	items: {
		one: true,
		two: true,
	},
	itemsOrder: ["two", "one"], // valid
}

{
	items: {
		one: true,
		two: true,
	},
	itemsOrder: ["two", "one", "three"], // invalid, "items" object does not contain "three" 
}

{
	items: {
		one: true,
		two: true,
	},
	itemsOrder: ["two"], // invalid, "itemsOrder" is missing "one" 
}

What do you think is the correct solution to problem? Here's how I defined a schema

const schema = {
	type: "object",
	properties: {
		items: {
			type: "object",
		},
		itemsOrder: {
			type: "array",
			keysFrom: { $data: "/items" }, // custom keyword
		},
	},
};

And here's the unfinished keysFrom

import Ajv, { _, KeywordCxt } from "ajv";
import { difference } from "ramda";

const ajv = new Ajv({ $data: true });
ajv.addKeyword({
	keyword: "keysFrom",
	$data: true,
	code(cxt: KeywordCxt) {
		const { data, schemaCode } = cxt;
		// I need to figure out if `data` and `schemaCode` contain the same items
		// That may be done by using difference() from Ramda
		cxt.fail$data(
			// I'm not sure what's the difference between `fail$data` and `fail`, didn't find anything in the docs
			_`console.log('codegen', ${data}, Object.keys(${schemaCode}))`
		);
	},
});

I need some help building the codegen function. Should I somehow pass the difference function to the _``? should I use gen.forOf() etc and somehow implement that functionality myself?

Will you be able to implement it? This does not require any changes to the Ajv codebase, but I'm willing to update the docs