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iparty.js
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iparty.js
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const debug = require('debug')('dataparty.iparty')
const dataparty_crypto = require('@dataparty/crypto')
const Query = require('./query.js')
const IDocument = require('./idocument')
const DocumentFactory = require('./document-factory')
const LokiCache = require('./loki-cache.js') // insert | populate cache
/**
* @class
* @alias module:dataparty.IParty
* @interface
*/
class IParty {
constructor({config, cache, noCache=false, comms, model, factories, documentClass, qb=null}){
this.config = config
this.qb = qb
if(noCache){ this.cache = null }
else{ this.cache = cache || new LokiCache() }
this.comms = comms
this._actor = {id: undefined, type: undefined}
this._actors = []
this._identity = undefined
this.started = false
/**
* @member factory
* @type {DocumentFactory} */
this.factory = new DocumentFactory({party: this, model, factories, documentClass})
}
/** @method */
async start(){
if(this.started){ return }
debug('start')
if(this.config){
await this.config.start()
}
if(this.cache){
await this.cache.start()
}
await Promise.all([
this.loadIdentity(),
this.loadActor(),
])
this.started = true
debug('\tDocument Validators', this.factory.getValidators())
debug('\tDocument Classes', this.factory.getTypes())
}
/**
* @method
*/
async createDocument(type, data, id){
let Type = this.factory.getFactory(type)
return await Type.create(this, {data, type, id})
}
/**
* @method
*/
async create (type, ...msgs) {
return await this.qb.create(type, msgs)
}
/**
* @method
*/
async remove (...msgs) {
return this.qb.modify(msgs, 'remove')
}
// takes modified json msgs & writes to backend, resolves to new stamps
// requires type & id
/**
* @method
*/
async update (...msgs) {
return this.qb.modify(msgs, 'update')
}
/**
* @method
*/
find () {
return new Query(this.qb, this.factory)
}
/**
* @method
*/
async call(msg){
throw new Error('Not Implemented')
}
/**
* @method
*/
async socket(reuse){
throw new Error('Not Implemented')
}
/** @type {ROSLIB} */
get ROSLIB(){
return ROSLIB
}
/** @type {IDocument} */
get Document(){
return this.factory.Document
}
/**
* @method
*/
get types(){
return this.factory.getFactories()
}
/**
* @type {module:dataparty/Types.Identity}
*/
get identity(){
if (!this.hasIdentity()){ return undefined }
return this._identity.toJSON(false)
}
get privateIdentity(){
if (!this.hasIdentity()){ return undefined }
return this._identity
}
/** @type {IdObj} */
get actor(){
if (this.actors && this.actors[0]){
return this.actors[0]
} else if (this._actor.id && this._actor.type){
return this._actor
}
return undefined
}
/** @type {IdObj[]} */
get actors(){
return this._actors
}
set actors(value){
this._actors = value
const primaryActor = this.actor
if (!primaryActor){
return
}
this._actor.id = primaryActor.id
this._actor.type = primaryActor.type
const path = 'actor'
this.config.write(path, this._actor)
}
/**
* @method
*/
hasIdentity(){
return this._identity != undefined
}
/**
* @method
*/
hasActor(){
return this.actor != undefined
}
/**
* @method
*/
async loadIdentity(){
const path = 'identity'
const cfgIdenStr = this.config.read(path)
if (!cfgIdenStr){
debug('generated new identity')
await this.resetIdentity()
} else {
debug('loaded identity')
this._identity = dataparty_crypto.Identity.fromString(JSON.stringify(cfgIdenStr))
}
}
async resetIdentity(){
const path = 'identity'
await this.config.write(path, null)
this._identity = new dataparty_crypto.Identity({id: 'primary'})
await this.config.write(path, this._identity.toJSON(true))
await this.loadIdentity()
}
/**
* @method
*/
async loadActor(){
const path = 'actor'
const localActorObj = this.config.read(path)
if (!localActorObj){ return }
this._actor.id = localActorObj.id
this._actor.type = localActorObj.type
debug('loaded actor', this._actor)
}
/**
* @method
*/
async encrypt(data, to){
const msg = new dataparty_crypto.Message({msg: data})
await msg.encrypt(this._identity, to.key)
return msg
}
/**
* @method
*/
async decrypt(reply, expectedSender, expectClearTextReply = false){
// if reply has ciphertext & sig attempt to decrypt
if (reply.enc && reply.sig) {
const msg = new dataparty_crypto.Message(reply)
const replyContent = await msg.decrypt(this._identity)
const publicKeys = dataparty_crypto.Routines.extractPublicKeys(msg.enc)
debug(`publicKeys.sign - ${publicKeys.sign}`)
if (publicKeys.sign !== expectedSender.key.public.sign ||
publicKeys.box !== expectedSender.key.public.box) {
throw new Error('TrustFail: reply is not from service')
}
debug('decrypted reply ->', JSON.stringify(replyContent))
if (replyContent.error) {
debug('call failed ->', replyContent.error)
throw replyContent.error
}
return replyContent
} else if (expectClearTextReply && !reply.error) {
return reply
}
if (reply.error) {
debug('call failed ->', reply.error)
throw reply.error
}
throw new Error('TrustFail: reply is not encrypted')
}
}
module.exports = IParty