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59 lines
1.2 KiB
59 lines
1.2 KiB
/**
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* utilities for hashing config objects.
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* basically iteratively updates hash with a JSON-like format
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*/
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'use strict'
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exports.__esModule = true
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const createHash = require('crypto').createHash
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const stringify = JSON.stringify
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function hashify(value, hash) {
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if (!hash) hash = createHash('sha256')
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if (value instanceof Array) {
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hashArray(value, hash)
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} else if (value instanceof Object) {
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hashObject(value, hash)
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} else {
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hash.update(stringify(value) || 'undefined')
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}
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return hash
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}
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exports.default = hashify
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function hashArray(array, hash) {
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if (!hash) hash = createHash('sha256')
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hash.update('[')
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for (let i = 0; i < array.length; i++) {
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hashify(array[i], hash)
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hash.update(',')
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}
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hash.update(']')
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return hash
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}
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hashify.array = hashArray
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exports.hashArray = hashArray
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function hashObject(object, hash) {
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if (!hash) hash = createHash('sha256')
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hash.update('{')
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Object.keys(object).sort().forEach(key => {
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hash.update(stringify(key))
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hash.update(':')
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hashify(object[key], hash)
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hash.update(',')
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})
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hash.update('}')
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return hash
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}
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hashify.object = hashObject
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exports.hashObject = hashObject
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