discord.js/packages/builders/src/interactions/contextMenuCommands/Assertions.ts

import { s } from '@sapphire/shapeshift';
import { ApplicationCommandType } from 'discord-api-types/v10';
import type { ContextMenuCommandType } from './ContextMenuCommandBuilder';

const namePredicate = s.string
	.lengthGreaterThanOrEqual(1)
	.lengthLessThanOrEqual(32)
	.regex(/^( *[\p{L}\p{N}\p{sc=Devanagari}\p{sc=Thai}_-]+ *)+$/u);

const typePredicate = s.union(s.literal(ApplicationCommandType.User), s.literal(ApplicationCommandType.Message));

const booleanPredicate = s.boolean;

export function validateDefaultPermission(value: unknown): asserts value is boolean {
	booleanPredicate.parse(value);
}

export function validateName(name: unknown): asserts name is string {
	namePredicate.parse(name);
}

export function validateType(type: unknown): asserts type is ContextMenuCommandType {
	typePredicate.parse(type);
}

export function validateRequiredParameters(name: string, type: number) {
	// Assert name matches all conditions
	validateName(name);

	// Assert type is valid
	validateType(type);
}

const dmPermissionPredicate = s.boolean.nullish;

export function validateDMPermission(value: unknown): asserts value is boolean | null | undefined {
	dmPermissionPredicate.parse(value);
}

const memberPermissionPredicate = s.union(
	s.bigint.transform((value) => value.toString()),
	s.number.safeInt.transform((value) => value.toString()),
	s.string.regex(/^\d+$/),
).nullish;

export function validateDefaultMemberPermissions(permissions: unknown) {
	return memberPermissionPredicate.parse(permissions);
}