60 lines
1.2 KiB
JavaScript
60 lines
1.2 KiB
JavaScript
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/**
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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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