open-consul/ui-v2/app/utils/dom/event-source/index.js

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import ObjectProxy from '@ember/object/proxy';
import ArrayProxy from '@ember/array/proxy';
import createListeners from 'consul-ui/utils/dom/create-listeners';
import EventTarget from 'consul-ui/utils/dom/event-target/rsvp';
import cacheFactory from 'consul-ui/utils/dom/event-source/cache';
import proxyFactory from 'consul-ui/utils/dom/event-source/proxy';
import firstResolverFactory from 'consul-ui/utils/dom/event-source/resolver';
import CallableEventSourceFactory from 'consul-ui/utils/dom/event-source/callable';
import OpenableEventSourceFactory from 'consul-ui/utils/dom/event-source/openable';
import BlockingEventSourceFactory from 'consul-ui/utils/dom/event-source/blocking';
import StorageEventSourceFactory from 'consul-ui/utils/dom/event-source/storage';
import EmberObject from '@ember/object';
import { task } from 'ember-concurrency';
import { env } from 'consul-ui/env';
let runner;
switch (env('CONSUL_UI_REALTIME_RUNNER')) {
case 'ec':
runner = function(target, configuration, isClosed) {
return EmberObject.extend({
task: task(function* run() {
while (!isClosed(target)) {
yield target.source.bind(target)(configuration);
}
}),
})
.create()
.get('task')
.perform();
};
break;
case 'generator':
runner = async function(target, configuration, isClosed) {
const run = function*() {
while (!isClosed(target)) {
yield target.source.bind(target)(configuration);
}
};
let step = run().next();
let res;
while (!step.done) {
res = await step.value;
step = run().next();
}
return res;
};
break;
case 'async':
runner = async function(target, configuration, isClosed) {
const run = function() {
return target.source.bind(target)(configuration);
};
let res;
while (!isClosed(target)) {
res = await run();
}
return res;
};
break;
default:
// use the default runner
}
// All The EventSource-i
export const CallableEventSource = CallableEventSourceFactory(EventTarget, Promise, runner);
export const OpenableEventSource = OpenableEventSourceFactory(CallableEventSource);
export const BlockingEventSource = BlockingEventSourceFactory(OpenableEventSource);
export const StorageEventSource = StorageEventSourceFactory(EventTarget, Promise);
// various utils
export const proxy = proxyFactory(ObjectProxy, ArrayProxy, createListeners);
export const resolve = firstResolverFactory(Promise);
export const source = function(source) {
// create API needed for conventional promise blocked, loading, Routes
// i.e. resolve/reject on first response
return resolve(source, createListeners()).then(function(data) {
// create API needed for conventional DD/computed and Controllers
return proxy(source, data);
});
};
export const cache = cacheFactory(source, BlockingEventSource, Promise);
const errorEvent = function(e) {
return new ErrorEvent('error', {
error: e,
message: e.message,
});
};
export const fromPromise = function(promise) {
return new CallableEventSource(function(configuration) {
const dispatch = this.dispatchEvent.bind(this);
const close = () => {
this.close();
};
return promise
.then(function(result) {
close();
dispatch({ type: 'message', data: result });
})
.catch(function(e) {
close();
dispatch(errorEvent(e));
});
});
};
export const toPromise = function(target, cb, eventName = 'message', errorName = 'error') {
return new Promise(function(resolve, reject) {
// TODO: e.target.data
const message = function(e) {
resolve(e.data);
};
const error = function(e) {
reject(e.error);
};
const remove = function() {
if (typeof target.close === 'function') {
target.close();
}
target.removeEventListener(eventName, message);
target.removeEventListener(errorName, error);
};
target.addEventListener(eventName, message);
target.addEventListener(errorName, error);
cb(remove);
});
};
export const once = function(cb, configuration, Source = OpenableEventSource) {
return new Source(function(configuration, source) {
return cb(configuration, source)
.then(function(data) {
source.dispatchEvent({ type: 'message', data: data });
source.close();
})
.catch(function(e) {
source.dispatchEvent({ type: 'error', error: e });
source.close();
});
}, configuration);
};