heading.ts
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heading.ts
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	import { predicates, ShapeToType } from "@sealcode/ts-predicates";
	import { Primitive } from "./primitive";

	export const HeadingShape = {
	type: predicates.const(<const>"heading"),
	content: predicates.string,
	level: predicates.number,
	id: predicates.maybe(predicates.string),
	};

	export type HeadingJSON = ShapeToType<typeof HeadingShape>;

	export class HeadingPrimitive extends Primitive {
	content: string;
	level: number;
	id: string \| null = null;

	constructor(json: Record<string, unknown>) {
	super();
	this.content = json["content"] as string;
	this.level = json["level"] as number;
	this.id = json["id"] as string \| null;
	}

	to_html(): string {
	return /* HTML */ `<h1>${this.content}</h1>`;
	}

	extract_headings(): HeadingPrimitive[] {
	return [this];
	}
	}