form-control.ts
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form-control.ts
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	import Router from "@koa/router";
	import { Context } from "koa";
	import { FlatTemplatable } from "tempstream";
	import { FormMessage, FormData } from "../form-types.js";
	import type { Form } from "../form.js";

	export type FieldMessages<Fieldnames extends string = string> = Record<
	Fieldnames,
	{ type: "error" \| "info"; message: string }
	>;

	export class FormControlContext {
	constructor(
	public ctx: Context,
	public data: FormData,
	public messages: FormMessage[],
	public field_name_prefix: string,
	public form_id: string,
	public validate: boolean
	) {}
	}

	export abstract class FormControl {
	abstract render(
	fctx: FormControlContext
	): FlatTemplatable \| Promise<FlatTemplatable>;
	abstract role: "input" \| "decoration" \| "messages" \| "submit";

	// eslint-disable-next-line @typescript-eslint/no-explicit-any
	mount(_router: Router, _form: Form<any, any>) {}
	}