props-parser.ts
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props-parser.ts
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	import { Context } from "koa";
	import merge from "merge";
	import { FormDataValue } from "../forms/form-types.js";
	import type { BasePageProps } from "./list.js";

	export type EncodedProps = Record<string, unknown>;

	// page props parser is only tasked with getting the raw props from somewhere
	// and being able to put new values back to that somewhere. Parsing to numbers
	// or any other exotic types is done by fields logic.

	export abstract class PagePropsParser<PropsType> {
	abstract decode(ctx: Context): Record<string, FormDataValue>;
	abstract encode(props: Record<string, FormData>): EncodedProps;
	abstract getHTMLInputName(prop_name: string): string;

	overwriteProp(ctx: Context, new_props: Partial<PropsType>): EncodedProps {
	const result = {};
	merge.recursive(result, this.decode(ctx), new_props);
	return result;
	}
	}

	export class AllQueryParams<
	PropsType extends BasePageProps
	> extends PagePropsParser<PropsType> {
	decode(ctx: Context): Record<string, FormDataValue> {
	return ctx.query;
	}

	encode(props: PropsType): Record<string, unknown> {
	return props;
	}

	getHTMLInputName(prop_name: string): string {
	return prop_name;
	}
	}