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/**
* @param {Set<string>} expected
*/
function validator(expected) {
/**
* @param {any} module
* @param {string} [file]
*/
function validate(module, file) {
if (!module) return;
for (const key in module) {
if (key[0] === '_' || expected.has(key)) continue; // key is valid in this module
const values = [...expected.values()];
const hint =
hint_for_supported_files(key, file?.slice(file.lastIndexOf('.'))) ??
`valid exports are ${values.join(', ')}, or anything with a '_' prefix`;
throw new Error(`Invalid export '${key}'${file ? ` in ${file}` : ''} (${hint})`);
}
}
return validate;
}
/**
* @param {string} key
* @param {string} ext
* @returns {string | void}
*/
function hint_for_supported_files(key, ext = '.js') {
const supported_files = [];
if (valid_layout_exports.has(key)) {
supported_files.push(`+layout${ext}`);
}
if (valid_page_exports.has(key)) {
supported_files.push(`+page${ext}`);
}
if (valid_layout_server_exports.has(key)) {
supported_files.push(`+layout.server${ext}`);
}
if (valid_page_server_exports.has(key)) {
supported_files.push(`+page.server${ext}`);
}
if (valid_server_exports.has(key)) {
supported_files.push(`+server${ext}`);
}
if (supported_files.length > 0) {
return `'${key}' is a valid export in ${supported_files.slice(0, -1).join(', ')}${
supported_files.length > 1 ? ' or ' : ''
}${supported_files.at(-1)}`;
}
}
const valid_layout_exports = new Set([
'load',
'prerender',
'csr',
'ssr',
'trailingSlash',
'config'
]);
const valid_page_exports = new Set([...valid_layout_exports, 'entries']);
const valid_layout_server_exports = new Set([...valid_layout_exports]);
const valid_page_server_exports = new Set([...valid_layout_server_exports, 'actions', 'entries']);
const valid_server_exports = new Set([
'GET',
'POST',
'PATCH',
'PUT',
'DELETE',
'OPTIONS',
'HEAD',
'fallback',
'prerender',
'trailingSlash',
'config',
'entries'
]);
export const validate_layout_exports = validator(valid_layout_exports);
export const validate_page_exports = validator(valid_page_exports);
export const validate_layout_server_exports = validator(valid_layout_server_exports);
export const validate_page_server_exports = validator(valid_page_server_exports);
export const validate_server_exports = validator(valid_server_exports);
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