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const Migrator = require('pojo-migrator')
const extend = require('xtend')
const STORAGE_KEY = 'metamask-config'
var DEFAULT_RPC = 'https://rawtestrpc.metamask.io/'
/* The config-manager is a convenience object
* wrapping a pojo-migrator.
*
* It exists mostly to allow the creation of
* convenience methods to access and persist
* particular portions of the state.
*/
module.exports = ConfigManager
function ConfigManager() {
/* The migrator exported on the config-manager
* has two methods the user should be concerned with:
*
* getData(), which returns the app-consumable data object
* saveData(), which persists the app-consumable data object.
*/
this.migrator = new Migrator({
// Migrations must start at version 1 or later.
// They are objects with a `version` number
// and a `migrate` function.
//
// The `migrate` function receives the previous
// config data format, and returns the new one.
migrations: [],
// How to load initial config.
// Includes step on migrating pre-pojo-migrator data.
loadData: loadData,
// How to persist migrated config.
setData: function(data) {
window.localStorage[STORAGE_KEY] = JSON.stringify(data)
},
})
}
ConfigManager.prototype.setConfig = function(config) {
var data = this.migrator.getData()
data.config = config
this.setData(data)
}
ConfigManager.prototype.setRpcTarget = function(rpcUrl) {
var config = this.getConfig()
config.provider = {
type: 'rpc',
rpcTarget: rpcUrl,
}
this.setConfig(config)
}
ConfigManager.prototype.getConfig = function() {
var data = this.migrator.getData()
if ('config' in data) {
return data.config
} else {
return {
provider: {
type: 'rpc',
rpcTarget: DEFAULT_RPC,
}
}
}
}
ConfigManager.prototype.setData = function(data) {
this.migrator.saveData(data)
}
ConfigManager.prototype.getData = function() {
return this.migrator.getData()
}
ConfigManager.prototype.setWallet = function(wallet) {
var data = this.migrator.getData()
data.wallet = wallet
this.setData(data)
}
ConfigManager.prototype.getWallet = function() {
return this.migrator.getData().wallet
}
ConfigManager.prototype.getSeedWords = function() {
return this.migrator.getData().seedWords
}
ConfigManager.prototype.setSeedWords = function(seedWords) {
var data = this.migrator.getData()
data.seedWords = seedWords
this.setData(data)
}
ConfigManager.prototype.clearSeedWords = function() {
var data = this.migrator.getData()
delete data.seedWords
this.setData(data)
}
ConfigManager.prototype.getCurrentRpcAddress = function() {
var config = this.getConfig()
if (!config) return null
return config.provider && config.provider.rpcTarget ? config.provider.rpcTarget : DEFAULT_RPC
}
ConfigManager.prototype.clearWallet = function() {
var data = this.getConfig()
delete data.wallet
this.setData(data)
}
function loadData() {
var oldData = getOldStyleData()
var newData
try {
newData = JSON.parse(window.localStorage[STORAGE_KEY])
} catch (e) {}
var data = extend({
version: 0,
data: {
config: {
rpcTarget: DEFAULT_RPC,
}
}
}, oldData ? oldData : null, newData ? newData : null)
return data
}
function getOldStyleData() {
var config, wallet, seedWords
var result = {
meta: { version: 0 },
data: {},
}
try {
config = JSON.parse(window.localStorage['config'])
result.data.config = config
} catch (e) {}
try {
wallet = JSON.parse(window.localStorage['lightwallet'])
result.data.wallet = wallet
} catch (e) {}
try {
seedWords = window.localStorage['seedWords']
result.data.seedWords = seedWords
} catch (e) {}
return result
}
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