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const ObservableStore = require('obs-store')
const extend = require('xtend')
const BalanceController = require('./balance')
class ComputedbalancesController {
constructor (opts = {}) {
const { accountTracker, txController } = opts
this.accountTracker = accountTracker
this.txController = txController
const initState = extend({
computedBalances: {},
}, opts.initState)
this.store = new ObservableStore(initState)
this.balances = {}
this._initBalanceUpdating()
}
updateAllBalances () {
for (let address in this.balances) {
this.balances[address].updateBalance()
}
}
_initBalanceUpdating () {
const store = this.accountTracker.getState()
this.addAnyAccountsFromStore(store)
this.accountTracker.subscribe(this.addAnyAccountsFromStore.bind(this))
}
addAnyAccountsFromStore(store) {
const balances = store.accounts
for (let address in balances) {
this.trackAddressIfNotAlready(address)
}
}
trackAddressIfNotAlready (address) {
const state = this.store.getState()
if (!(address in state.computedBalances)) {
this.trackAddress(address)
}
}
trackAddress (address) {
let updater = new BalanceController({
address,
accountTracker: this.accountTracker,
txController: this.txController,
})
updater.store.subscribe((accountBalance) => {
let newState = this.store.getState()
newState.computedBalances[address] = accountBalance
this.store.updateState(newState)
})
this.balances[address] = updater
updater.updateBalance()
}
}
module.exports = ComputedbalancesController
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