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