structured-array.ts
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structured-array.ts
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	import { hasShape, is, predicates } from "@sealcode/ts-predicates";
	import type { ValidationResult } from "../../../chip-types/field";
	import type Field from "../../../chip-types/field";
	import { Context, Fieldset, FieldsetInput } from "../../../main";
	import { ArrayStorage } from "./array-storage";

	export class StructuredArray<
	Subfields extends Record<string, Field>
	> extends ArrayStorage<FieldsetInput<Subfields>> {
	typeName = "structured-array";
	constructor(public subfields: Subfields) {
	super(predicates.object);
	}

	async getEmptyElement() {
	return {} as FieldsetInput<Subfields>;
	}

	async isProperElement(
	context: Context,
	element: unknown,
	index: number
	): Promise<{ valid: boolean; reason: string }> {
	const orig_result = await super.isProperElement(
	context,
	element,
	index
	);
	if (!orig_result.valid) {
	return orig_result;
	}

	const obj = element as FieldsetInput<Subfields>;
	const fieldset = new Fieldset(this.subfields);
	fieldset.setMultiple(obj as any);

	const result = await fieldset.validate(
	context,
	new Fieldset(this.subfields),
	true
	);
	if (result.valid) {
	return { valid: true, reason: "no validation errors" };
	} else {
	return {
	valid: false,
	reason: JSON.stringify(
	Object.fromEntries(
	Object.entries(result.errors).map(([key, value]) => [
	`[${index}]${key}`,
	value,
	])
	)
	),
	};
	}
	}
	}