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#!/usr/bin/node
/* jshint esnext:true */
"use strict";
const request = require("request-promise-native"),
WebSocket = require("ws"),
webstomp = require("webstomp-client"),
Channel = require("async-csp").Channel;
const API_FE_URL = process.env.API_FE_URL || "http://vainsocial.dev/bots/api",
API_WS_URL = process.env.API_WS_URL || "ws://vainsocial.dev/ws",
API_BE_URL = process.env.API_BE_URL || "http://vainsocial.dev/bridge";
const notif = webstomp.over(new WebSocket(API_WS_URL,
{ perMessageDeflate: false }));
(function connect() {
notif.connect("web", "web",
() => console.log("connected to queue"),
(err) => connect()
);
})();
// TODO use keepalive / connection pool
function getFE(url) {
return request({
uri: API_FE_URL + url,
json: true
});
}
function postBE(url) {
return request.post({
uri: API_BE_URL + url,
json: true
});
}
function subscribe(topic, channel) {
return notif.subscribe("/topic/" + topic, (msg) => {
channel.put(msg.body);
msg.ack();
}, {"ack": "client"});
}
// be an async generator
// next() returns player data whenever an update is available
module.exports.searchPlayer = async function (name, timeout=60) {
let channel = new Channel(),
subscription = subscribe("player." + name, channel);
await postBE("/player/" + name + "/update");
// stop updates after timeout
setTimeout(() => {
channel.close();
subscription.unsubscribe();
}, timeout*1000);
channel.put("initial"); // initial fetch
let generator = async () => {
let msg;
while (true) {
msg = await channel.take();
if (["initial", "search_fail", "stats_update",
"matches_update"].indexOf(msg) != -1)
break;
}
if (msg == "search_fail") {
throw "not found";
}
if (msg == Channel.DONE) {
throw "exhausted";
}
return getFE("/player/" + name);
}
return { next: generator };
}
// return matches
module.exports.searchMatches = async function (name) {
return getFE("/player/" + name + "/matches/1.1.1.1");
}
// return single match
module.exports.searchMatch = async function (id) {
return getFE("/match/" + id);
}
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