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response.js
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response.js
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const { unpack } = require('./unpack')
const messages = require('./messages')
const { pack } = require('./pack')
const varint = require('varint')
const jitson = require('jitson')
const parse = jitson()
function toMaybeError(err) {
if (!err) {
return null
}
return Object.assign(new Error(), err)
}
class Response {
static get WIRE_TYPE() {
return 0x0A
}
static from(buffer, encoding) {
const type = varint.decode(buffer)
if (Response.WIRE_TYPE !== type) {
throw new TypeError('Invalid wire type for Response')
}
encoding = encoding || defaultEncoding
const decoded = messages.Response.decode(unpack(buffer))
const { results, error } = decoded
const response = new Response(encoding, decoded, error, results.map(decode))
return response
function decode(result) {
return encoding.decode(result)
}
}
constructor(encoding, req, error, results) {
this.id = req.id
this.name = req.name
this.error = toMaybeError(error)
this.results = results
this.encoding = encoding
}
toJSON() {
const { encoding } = this
return {
id: this.id,
name: this.name,
error: this.error || null,
results: this.results && this.results.map(encode),
}
function encode(result){
return encoding.encode(parse(JSON.stringify(result)))
}
}
toBuffer() {
return messages.Response.encode(this.toJSON())
}
pack() {
return pack(Response.WIRE_TYPE, this.toBuffer())
}
}
module.exports = {
Response
}