75 lines
1.6 KiB
JavaScript
75 lines
1.6 KiB
JavaScript
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/**
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* @typedef Options
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* Configuration for `stringify`.
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* @property {boolean} [padLeft=true]
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* Whether to pad a space before a token.
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* @property {boolean} [padRight=false]
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* Whether to pad a space after a token.
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*/
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/**
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* @typedef {Options} StringifyOptions
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* Please use `StringifyOptions` instead.
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*/
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/**
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* Parse comma-separated tokens to an array.
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*
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* @param {string} value
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* Comma-separated tokens.
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* @returns {Array<string>}
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* List of tokens.
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*/
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export function parse(value) {
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/** @type {Array<string>} */
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const tokens = []
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const input = String(value || '')
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let index = input.indexOf(',')
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let start = 0
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/** @type {boolean} */
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let end = false
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while (!end) {
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if (index === -1) {
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index = input.length
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end = true
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}
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const token = input.slice(start, index).trim()
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if (token || !end) {
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tokens.push(token)
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}
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start = index + 1
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index = input.indexOf(',', start)
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}
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return tokens
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}
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/**
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* Serialize an array of strings or numbers to comma-separated tokens.
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*
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* @param {Array<string|number>} values
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* List of tokens.
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* @param {Options} [options]
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* Configuration for `stringify` (optional).
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* @returns {string}
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* Comma-separated tokens.
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*/
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export function stringify(values, options) {
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const settings = options || {}
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// Ensure the last empty entry is seen.
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const input = values[values.length - 1] === '' ? [...values, ''] : values
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return input
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.join(
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(settings.padRight ? ' ' : '') +
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',' +
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(settings.padLeft === false ? '' : ' ')
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)
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.trim()
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}
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