const ObservableStore = require('obs-store') const extend = require('xtend') class AddressBookController { // Controller in charge of managing the address book functionality from the // recipients field on the send screen. Manages a history of all saved // addresses and all currently owned addresses. constructor (opts = {}, keyringController) { const initState = extend({ addressBook: [], }, opts.initState) this.store = new ObservableStore(initState) this.keyringController = keyringController } // // PUBLIC METHODS // // Sets a new address book in store by accepting a new address and nickname. setAddressBook (address, name) { return this._addToAddressBook(address, name) .then((addressBook) => { this.store.updateState({ addressBook, }) return Promise.resolve() }) } // // PRIVATE METHODS // // Performs the logic to add the address and name into the address book. The // pushed object is an object of two fields. Current behavior does not set an // upper limit to the number of addresses. _addToAddressBook (address, name) { let addressBook = this._getAddressBook() let identities = this._getIdentities() let addressBookIndex = addressBook.findIndex((element) => { return element.address.toLowerCase() === address.toLowerCase() || element.name === name }) let identitiesIndex = Object.keys(identities).findIndex((element) => { return element.toLowerCase() === address.toLowerCase() }) // trigger this condition if we own this address--no need to overwrite. if (identitiesIndex !== -1) { return Promise.resolve(addressBook) // trigger this condition if we've seen this address before--may need to update nickname. } else if (addressBookIndex !== -1) { addressBook.splice(addressBookIndex, 1) } else if (addressBook.length > 15) { addressBook.shift() } addressBook.push({ address: address, name, }) return Promise.resolve(addressBook) } // Internal method to get the address book. Current persistence behavior // should not require that this method be called from the UI directly. _getAddressBook () { return this.store.getState().addressBook } // Retrieves identities from the keyring controller in order to avoid // duplication _getIdentities () { return this.keyringController.memStore.getState().identities } } module.exports = AddressBookController