// Validate `encoding` option export const validateEncoding = ({encoding}) => { if (ENCODINGS.has(encoding)) { return; } const correctEncoding = getCorrectEncoding(encoding); if (correctEncoding !== undefined) { throw new TypeError(`Invalid option \`encoding: ${serializeEncoding(encoding)}\`. Please rename it to ${serializeEncoding(correctEncoding)}.`); } const correctEncodings = [...ENCODINGS].map(correctEncoding => serializeEncoding(correctEncoding)).join(', '); throw new TypeError(`Invalid option \`encoding: ${serializeEncoding(encoding)}\`. Please rename it to one of: ${correctEncodings}.`); }; const TEXT_ENCODINGS = new Set(['utf8', 'utf16le']); export const BINARY_ENCODINGS = new Set(['buffer', 'hex', 'base64', 'base64url', 'latin1', 'ascii']); const ENCODINGS = new Set([...TEXT_ENCODINGS, ...BINARY_ENCODINGS]); const getCorrectEncoding = encoding => { if (encoding === null) { return 'buffer'; } if (typeof encoding !== 'string') { return; } const lowerEncoding = encoding.toLowerCase(); if (lowerEncoding in ENCODING_ALIASES) { return ENCODING_ALIASES[lowerEncoding]; } if (ENCODINGS.has(lowerEncoding)) { return lowerEncoding; } }; const ENCODING_ALIASES = { // eslint-disable-next-line unicorn/text-encoding-identifier-case 'utf-8': 'utf8', 'utf-16le': 'utf16le', 'ucs-2': 'utf16le', ucs2: 'utf16le', binary: 'latin1', }; const serializeEncoding = encoding => typeof encoding === 'string' ? `"${encoding}"` : String(encoding);