mirror of
https://github.com/kremalicious/metamask-extension.git
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114 lines
3.9 KiB
JavaScript
114 lines
3.9 KiB
JavaScript
const ObservableStore = require('obs-store')
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const extend = require('xtend')
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class AddressBookController {
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/**
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* Controller in charge of managing the address book functionality from the
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* recipients field on the send screen. Manages a history of all saved
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* addresses and all currently owned addresses.
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*
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* @typedef {Object} AddressBookController
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* @param {object} opts Overrides the defaults for the initial state of this.store
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* @property {array} opts.initState initializes the the state of the AddressBookController. Can contain an
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* addressBook property to initialize the addressBook array
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* @param {KeyringController} keyringController (Soon to be deprecated) The keyringController used in the current
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* MetamaskController. Contains the identities used in this AddressBookController.
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* @property {object} store The the store of the current users address book
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* @property {array} store.addressBook An array of addresses and nicknames. These are set by the user when sending
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* to a new address.
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*
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*/
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constructor (opts = {}, keyringController) {
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const initState = extend({
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addressBook: [],
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}, opts.initState)
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this.store = new ObservableStore(initState)
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this.keyringController = keyringController
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}
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//
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// PUBLIC METHODS
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//
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/**
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* Sets a new address book in store by accepting a new address and nickname.
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*
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* @param {string} address A hex address of a new account that the user is sending to.
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* @param {string} name The name the user wishes to associate with the new account
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* @returns {Promise<void>} Promise resolves with undefined
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*
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*/
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setAddressBook (address, name) {
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return this._addToAddressBook(address, name)
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.then((addressBook) => {
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this.store.updateState({
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addressBook,
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})
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return Promise.resolve()
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})
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}
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/**
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* Performs the logic to add the address and name into the address book. The pushed object is an object of two
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* fields. Current behavior does not set an upper limit to the number of addresses.
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*
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* @private
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* @param {string} address A hex address of a new account that the user is sending to.
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* @param {string} name The name the user wishes to associate with the new account
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* @returns {Promise<array>} Promises the updated addressBook array
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*
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*/
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_addToAddressBook (address, name) {
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const addressBook = this._getAddressBook()
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const identities = this._getIdentities()
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const addressBookIndex = addressBook.findIndex((element) => { return element.address.toLowerCase() === address.toLowerCase() || element.name === name })
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const identitiesIndex = Object.keys(identities).findIndex((element) => { return element.toLowerCase() === address.toLowerCase() })
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// trigger this condition if we own this address--no need to overwrite.
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if (identitiesIndex !== -1) {
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return Promise.resolve(addressBook)
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// trigger this condition if we've seen this address before--may need to update nickname.
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} else if (addressBookIndex !== -1) {
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addressBook.splice(addressBookIndex, 1)
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} else if (addressBook.length > 15) {
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addressBook.shift()
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}
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addressBook.push({
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address: address,
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name,
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})
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return Promise.resolve(addressBook)
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}
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/**
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* Internal method to get the address book. Current persistence behavior should not require that this method be
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* called from the UI directly.
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*
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* @private
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* @returns {array} The addressBook array from the store.
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*
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*/
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_getAddressBook () {
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return this.store.getState().addressBook
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}
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/**
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* Retrieves identities from the keyring controller in order to avoid
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* duplication
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*
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* @deprecated
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* @returns {array} Returns the identies array from the keyringContoller's state
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*
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*/
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_getIdentities () {
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return this.keyringController.memStore.getState().identities
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}
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}
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module.exports = AddressBookController
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