@ihadeed/transport-commons
Version:
Shared functionality for websocket providers
71 lines • 3.23 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const debug_1 = __importDefault(require("debug"));
const lodash_1 = require("lodash");
const combined_1 = require("./channel/combined");
const mixins_1 = require("./mixins");
exports.keys = mixins_1.keys;
const debug = debug_1.default('@ihadeed/transport-commons/channels');
const { CHANNELS } = mixins_1.keys;
function channels() {
return (app) => {
if (typeof app.channel === 'function' && typeof app.publish === 'function') {
return;
}
Object.assign(app, mixins_1.channelMixin(), mixins_1.publishMixin());
Object.defineProperty(app, 'channels', {
get() {
return Object.keys(this[CHANNELS]);
}
});
app.mixins.push((service, path) => {
if (typeof service.publish === 'function' || !service._serviceEvents) {
return;
}
Object.assign(service, mixins_1.publishMixin());
// @ts-ignore
service._serviceEvents.forEach((event) => {
service.on(event, function (data, hook) {
if (!hook) {
// Fake hook for custom events
hook = { path, service, app, result: data };
}
debug('Publishing event', event, hook.path);
const servicePublishers = service[mixins_1.keys.PUBLISHERS];
const appPublishers = app[mixins_1.keys.PUBLISHERS];
// This will return the first publisher list that is not empty
// In the following precedence
const publisher = (
// 1. Service publisher for a specific event
servicePublishers[event] ||
// 2. Service publisher for all events
servicePublishers[mixins_1.keys.ALL_EVENTS] ||
// 3. App publisher for a specific event
appPublishers[event] ||
// 4. App publisher for all events
appPublishers[mixins_1.keys.ALL_EVENTS] ||
// 5. No publisher
lodash_1.noop);
Promise.resolve(publisher(data, hook)).then(result => {
if (!result) {
return;
}
const results = Array.isArray(result) ? lodash_1.compact(lodash_1.flattenDeep(result)) : [result];
const channel = new combined_1.CombinedChannel(results);
if (channel && channel.length > 0) {
app.emit('publish', event, channel, hook, data);
}
else {
debug('No connections to publish to');
}
});
});
});
});
};
}
exports.channels = channels;
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