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import {each, warn} from '../utils' |
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export default class BaseFeathersSyncer { |
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/** |
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* Create a syncer for feathers |
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* |
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* @param Vue |
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* @param vm |
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* @param path |
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* @param settings |
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*/ |
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constructor(Vue, vm, path, settings) { |
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this.Vue = Vue |
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this.vm = vm |
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this.path = path |
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this.settings = settings |
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this.filters = {} |
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this.unwatchers = {} |
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this.events = { |
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loaded: settings.loaded, |
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error: settings.errored |
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} |
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Vue.util.defineReactive(this, 'state', this._initialState()) |
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Vue.util.defineReactive(this, 'loading', true) |
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this._id = 'idField' in settings ? settings.idField : Vue.$syncer.idField |
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const client = Vue.$syncer.feathers |
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this.service = client.service(this.settings.service) |
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} |
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/** |
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* Cleanup after oneself |
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*/ |
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destroy() { |
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each(this.unwatchers, unwatcher => { |
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unwatcher() |
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}) |
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this.state = this._initialState() |
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this.vm = null |
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this.settings = null |
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this.Vue = null |
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this.service = null |
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} |
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/** |
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* Hook into feathers and set up value observers |
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* |
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* @returns {*} |
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*/ |
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ready() { |
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this._listenForServiceEvent('created', this.onItemCreated.bind(this)) |
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this._listenForServiceEvent('updated', this.onItemUpdated.bind(this)) |
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this._listenForServiceEvent('patched', this.onItemUpdated.bind(this)) |
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this._listenForServiceEvent('removed', this.onItemRemoved.bind(this)) |
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return this._bindComputedValues() |
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} |
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/** |
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* Refresh syncer's value |
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*/ |
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refresh() { |
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return this._loadNewState() |
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} |
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/** |
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* Handle errors loading the state |
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* |
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* @param error |
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* @private |
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*/ |
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_handleStateLoadingError(error) { |
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this.loading = false |
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this._fireEvent('error', error) |
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} |
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/** |
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* Register service listener and unlistener |
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* |
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* @param event |
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* @param callback |
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* @private |
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*/ |
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_listenForServiceEvent(event, callback) { |
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/* istanbul ignore next */ |
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if (process.env.NODE_ENV !== 'production') { |
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const origCallback = callback |
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callback = (...args) => { |
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if (this.Vue === null) { |
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warn('Removed event listener is being called. Please update feathers-socket-commons package.') |
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return |
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} |
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origCallback(...args) |
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} |
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} |
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this.service.on(event, callback) |
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this.unwatchers['service-' + event] = () => { |
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this.service.off(event, callback) |
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} |
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} |
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/** |
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* Wrapper for loading current state |
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* |
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* @returns {Promise.<T>} |
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* @private |
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*/ |
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_loadNewState() { |
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this.loading = true |
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return this._loadState() |
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} |
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/** |
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* Mark as everything's now loaded |
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* |
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* @private |
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*/ |
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_newStateLoaded() { |
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this.loading = false |
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this._fireEvent('loaded') |
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} |
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/** |
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* Fire event on both listeners in settings and instance |
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* |
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* @private |
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*/ |
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_fireEvent(event, ...args) { |
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if (event in this.events && this.events[event]) { |
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this.events[event].apply(this.vm, args) |
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} |
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this.vm.$emit(`syncer-${event}`, this.path, ...args) |
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} |
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} |
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t2t2 /
vue-syncers-feathers
