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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 (Array.isArray(value)) { |
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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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