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import {inspect as nodeInspect} from 'node:util';
import {colors, ENABLE_COLOR} from '#cli';
import {empty, withAggregate} from '#sugar';
function inspect(value) {
return nodeInspect(value, {colors: ENABLE_COLOR});
}
// Basic types (primitives)
export function a(noun) {
return /[aeiou]/.test(noun[0]) ? `an ${noun}` : `a ${noun}`;
}
export function isType(value, type) {
if (typeof value !== type)
throw new TypeError(`Expected ${a(type)}, got ${typeof value}`);
return true;
}
export function isBoolean(value) {
return isType(value, 'boolean');
}
export function isNumber(value) {
return isType(value, 'number');
}
export function isPositive(number) {
isNumber(number);
if (number <= 0) throw new TypeError(`Expected positive number`);
return true;
}
export function isNegative(number) {
isNumber(number);
if (number >= 0) throw new TypeError(`Expected negative number`);
return true;
}
export function isPositiveOrZero(number) {
isNumber(number);
if (number < 0) throw new TypeError(`Expected positive number or zero`);
return true;
}
export function isNegativeOrZero(number) {
isNumber(number);
if (number > 0) throw new TypeError(`Expected negative number or zero`);
return true;
}
export function isInteger(number) {
isNumber(number);
if (number % 1 !== 0) throw new TypeError(`Expected integer`);
return true;
}
export function isCountingNumber(number) {
isInteger(number);
isPositive(number);
return true;
}
export function isWholeNumber(number) {
isInteger(number);
isPositiveOrZero(number);
return true;
}
export function isString(value) {
return isType(value, 'string');
}
export function isStringNonEmpty(value) {
isString(value);
if (value.trim().length === 0)
throw new TypeError(`Expected non-empty string`);
return true;
}
export function optional(validator) {
return value => value === null || value === undefined || validator(value);
}
// Complex types (non-primitives)
export function isInstance(value, constructor) {
isObject(value);
if (!(value instanceof constructor))
throw new TypeError(`Expected ${constructor.name}, got ${value.constructor.name}`);
return true;
}
export function isDate(value) {
isInstance(value, Date);
if (isNaN(value))
throw new TypeError(`Expected valid date`);
return true;
}
export function isObject(value) {
isType(value, 'object');
// Note: Please remember that null is always a valid value for properties
// held by a CacheableObject. This assertion is exclusively for use in other
// contexts.
if (value === null) throw new TypeError(`Expected an object, got null`);
return true;
}
export function isArray(value) {
if (typeof value !== 'object' || value === null || !Array.isArray(value))
throw new TypeError(`Expected an array, got ${value}`);
return true;
}
// This one's shaped a bit different from other "is" functions.
// More like validate functions, it returns a function.
export function is(...values) {
if (Array.isArray(values)) {
values = new Set(values);
}
if (values.size === 1) {
const expected = Array.from(values)[0];
return (value) => {
if (value !== expected) {
throw new TypeError(`Expected ${expected}, got ${value}`);
}
return true;
};
}
return (value) => {
if (!values.has(value)) {
throw new TypeError(`Expected one of ${Array.from(values).join(' ')}, got ${value}`);
}
return true;
};
}
function validateArrayItemsHelper(itemValidator) {
return (item, index) => {
try {
const value = itemValidator(item);
if (value !== true) {
throw new Error(`Expected validator to return true`);
}
} catch (error) {
error.message = `(index: ${colors.yellow(`#${index}`)}, item: ${inspect(item)}) ${error.message}`;
throw error;
}
};
}
export function validateArrayItems(itemValidator) {
const fn = validateArrayItemsHelper(itemValidator);
return (array) => {
isArray(array);
withAggregate({message: 'Errors validating array items'}, ({wrap}) => {
array.forEach(wrap(fn));
});
return true;
};
}
export function strictArrayOf(itemValidator) {
return validateArrayItems(itemValidator);
}
export function sparseArrayOf(itemValidator) {
return validateArrayItems(item => {
if (item === false || item === null) {
return true;
}
return itemValidator(item);
});
}
export function validateInstanceOf(constructor) {
return (object) => isInstance(object, constructor);
}
// Wiki data (primitives & non-primitives)
export function isColor(color) {
isStringNonEmpty(color);
if (color.startsWith('#')) {
if (![4, 5, 7, 9].includes(color.length))
throw new TypeError(`Expected #rgb, #rgba, #rrggbb, or #rrggbbaa, got length ${color.length}`);
if (/[^0-9a-fA-F]/.test(color.slice(1)))
throw new TypeError(`Expected hexadecimal digits`);
return true;
}
throw new TypeError(`Unknown color format`);
}
export function isCommentary(commentary) {
isString(commentary);
const [firstLine] = commentary.match(/.*/);
if (!firstLine.replace(/<\/b>/g, '').includes(':</i>')) {
throw new TypeError(`Missing commentary citation: "${
firstLine.length > 40
? firstLine.slice(0, 40) + '...'
: firstLine
}"`);
}
return true;
}
const isArtistRef = validateReference('artist');
export function validateProperties(spec) {
const specEntries = Object.entries(spec);
const specKeys = Object.keys(spec);
return (object) => {
isObject(object);
if (Array.isArray(object))
throw new TypeError(`Expected an object, got array`);
withAggregate({message: `Errors validating object properties`}, ({call}) => {
for (const [specKey, specValidator] of specEntries) {
call(() => {
const value = object[specKey];
try {
specValidator(value);
} catch (error) {
error.message = `(key: ${colors.green(specKey)}, value: ${inspect(value)}) ${error.message}`;
throw error;
}
});
}
const unknownKeys = Object.keys(object).filter((key) => !specKeys.includes(key));
if (unknownKeys.length > 0) {
call(() => {
throw new Error(`Unknown keys present (${unknownKeys.length}): [${unknownKeys.join(', ')}]`);
});
}
});
return true;
};
}
export const isContribution = validateProperties({
who: isArtistRef,
what: (value) =>
value === undefined ||
value === null ||
isStringNonEmpty(value),
});
export const isContributionList = validateArrayItems(isContribution);
export const isAdditionalFile = validateProperties({
title: isString,
description: (value) =>
value === undefined ||
value === null ||
isString(value),
files: validateArrayItems(isString),
});
export const isAdditionalFileList = validateArrayItems(isAdditionalFile);
export const isTrackSection = validateProperties({
name: optional(isString),
color: optional(isColor),
dateOriginallyReleased: optional(isDate),
isDefaultTrackSection: optional(isBoolean),
tracks: optional(validateReferenceList('track')),
});
export const isTrackSectionList = validateArrayItems(isTrackSection);
export function isDimensions(dimensions) {
isArray(dimensions);
if (dimensions.length !== 2) throw new TypeError(`Expected 2 item array`);
isPositive(dimensions[0]);
isInteger(dimensions[0]);
isPositive(dimensions[1]);
isInteger(dimensions[1]);
return true;
}
export function isDirectory(directory) {
isStringNonEmpty(directory);
if (directory.match(/[^a-zA-Z0-9_-]/))
throw new TypeError(`Expected only letters, numbers, dash, and underscore, got "${directory}"`);
return true;
}
export function isDuration(duration) {
isNumber(duration);
isPositiveOrZero(duration);
return true;
}
export function isFileExtension(string) {
isStringNonEmpty(string);
if (string[0] === '.')
throw new TypeError(`Expected no dot (.) at the start of file extension`);
if (string.match(/[^a-zA-Z0-9_]/))
throw new TypeError(`Expected only alphanumeric and underscore`);
return true;
}
export function isLanguageCode(string) {
// TODO: This is a stub function because really we don't need a detailed
// is-language-code parser right now.
isString(string);
return true;
}
export function isName(name) {
return isString(name);
}
export function isURL(string) {
isStringNonEmpty(string);
new URL(string);
return true;
}
export function validateReference(type = 'track') {
return (ref) => {
isStringNonEmpty(ref);
const match = ref
.trim()
.match(/^(?:(?<typePart>\S+):(?=\S))?(?<directoryPart>.+)(?<!:)$/);
if (!match) throw new TypeError(`Malformed reference`);
const {groups: {typePart, directoryPart}} = match;
if (typePart) {
if (typePart !== type)
throw new TypeError(`Expected ref to begin with "${type}:", got "${typePart}:"`);
isDirectory(directoryPart);
}
isName(ref);
return true;
};
}
export function validateReferenceList(type = '') {
return validateArrayItems(validateReference(type));
}
export function validateWikiData({
referenceType = '',
allowMixedTypes = false,
}) {
if (referenceType && allowMixedTypes) {
throw new TypeError(`Don't specify both referenceType and allowMixedTypes`);
}
const isArrayOfObjects = validateArrayItems(isObject);
return (array) => {
isArrayOfObjects(array);
if (empty(array)) {
return true;
}
const allRefTypes =
new Set(array.map(object =>
object.constructor[Symbol.for('Thing.referenceType')]));
if (allRefTypes.has(undefined)) {
if (allRefTypes.size === 1) {
throw new TypeError(`Expected array of wiki data objects, got array of other objects`);
} else {
throw new TypeError(`Expected array of wiki data objects, got mixed items`);
}
}
if (allRefTypes.size > 1) {
if (allowMixedTypes) {
return true;
}
const types = () => Array.from(allRefTypes).join(', ');
if (referenceType) {
if (allRefTypes.has(referenceType)) {
allRefTypes.remove(referenceType);
throw new TypeError(`Expected array of only ${referenceType}, also got other types: ${types()}`)
} else {
throw new TypeError(`Expected array of only ${referenceType}, got other types: ${types()}`);
}
}
throw new TypeError(`Expected array of unmixed reference types, got multiple: ${types()}`);
}
if (referenceType && !allRefTypes.has(referenceType)) {
throw new TypeError(`Expected array of ${referenceType}, got array of ${allRefTypes[0]}`)
}
return true;
};
}
// Compositional utilities
export function oneOf(...checks) {
return (value) => {
const errorMeta = [];
for (let i = 0, check; (check = checks[i]); i++) {
try {
const result = check(value);
if (result !== true) {
throw new Error(`Check returned false`);
}
return true;
} catch (error) {
errorMeta.push([check, i, error]);
}
}
// Don't process error messages until every check has failed.
const errors = [];
for (const [check, i, error] of errorMeta) {
error.message = check.name
? `(#${i} "${check.name}") ${error.message}`
: `(#${i}) ${error.message}`;
error.check = check;
errors.push(error);
}
throw new AggregateError(errors, `Expected one of ${checks.length} possible checks, but none were true`);
};
}
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