61 lines
1.2 KiB
JavaScript
61 lines
1.2 KiB
JavaScript
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function stringify (value, space) {
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return JSON.stringify(value, replacer, space)
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}
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function parse (text) {
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return JSON.parse(text, reviver)
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}
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function replacer (key, value) {
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if (isBufferLike(value)) {
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if (isArray(value.data)) {
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if (value.data.length > 0) {
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value.data = 'base64:' + Buffer.from(value.data).toString('base64')
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} else {
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value.data = ''
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}
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}
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}
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return value
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}
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function reviver (key, value) {
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if (isBufferLike(value)) {
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if (isArray(value.data)) {
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return Buffer.from(value.data)
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} else if (isString(value.data)) {
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if (value.data.startsWith('base64:')) {
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return Buffer.from(value.data.slice('base64:'.length), 'base64')
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}
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// Assume that the string is UTF-8 encoded (or empty).
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return Buffer.from(value.data)
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}
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}
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return value
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}
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function isBufferLike (x) {
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return (
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isObject(x) && x.type === 'Buffer' && (isArray(x.data) || isString(x.data))
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)
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}
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function isArray (x) {
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return Array.isArray(x)
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}
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function isString (x) {
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return typeof x === 'string'
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}
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function isObject (x) {
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return typeof x === 'object' && x !== null
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}
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module.exports = {
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stringify,
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parse,
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replacer,
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reviver
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}
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