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#!/usr/bin/node
/* jshint esnext:true */
"use strict";
const request = require("request-promise-native"),
Promise = require("bluebird"),
WebSocket = require("ws"),
webstomp = require("webstomp-client"),
cacheManager = require("cache-manager"),
Channel = require("async-csp").Channel;
let cache = cacheManager.caching({
store: "memory",
ttl: 10 // s
});
const UPDATE_TIMEOUT = parseInt(process.env.UPDATE_TIMEOUT) || 60; // s
const API_FE_URL = process.env.API_FE_URL || "http://vainsocial.dev/bots/api",
API_MAP_URL = process.env.API_MAP_URL || "http://vainsocial.dev/masters/",
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 getMap(url) {
return request({
uri: API_MAP_URL + url,
json: true,
forever: true
});
}
function getFE(url) {
return request({
uri: API_FE_URL + url,
json: true,
forever: true
});
}
function postBE(url) {
return request.post({
uri: API_BE_URL + url,
json: true,
forever: true
});
}
function subscribe(topic, channel) {
return notif.subscribe("/topic/" + topic, (msg) => {
channel.put(msg.body);
msg.ack();
}, {"ack": "client"});
}
// return id<->name mappings
async function getMappings() {
return await cache.wrap("mappings", async () => {
let mapping = new Map();
await Promise.map(
["gamemode"], async (table) => {
mapping[table] = new Map();
(await getMap(table)).map(
(map) => mapping[table][map["id"]] = map["name"])
}
);
return mapping;
});
}
module.exports.mapGameMode = async function(id) {
return (await getMappings())["gamemode"][id];
}
// be an async iterator
// next() returns promises that are awaited until there is an update
module.exports.subscribeUpdates = function(name, timeout=UPDATE_TIMEOUT) {
const channel = new Channel(),
subscription = subscribe("player." + name, channel);
// stop updates after timeout
setTimeout(() => channel.close(), timeout*1000);
let msg;
return { next: async function () {
if (this._first) {
this._first = false;
await postBE("/player/" + name + "/update");
return true;
}
do {
msg = await channel.take();
} while([Channel.DONE, "initial", "search_fail",
"stats_update", "matches_update"].indexOf(msg) == -1);
// bust caches
if (["stats_update"].indexOf(msg) != -1)
cache.del("player+" + name);
if (["matches_update"].indexOf(msg) != -1) {
cache.del("matches+" + name);
cache.del("player+" + name);
}
if ([Channel.DONE, "search_fail"].indexOf(msg) != -1) {
subscription.unsubscribe();
return undefined;
}
return true;
}, _first: true };
}
// return player
module.exports.getPlayer = async function(name) {
return await cache.wrap("player+" + name, async () => {
try {
return await getFE("/player/" + name);
} catch (err) {
return undefined;
}
}, { ttl: 60 });
}
// return matches
module.exports.getMatches = async function(name) {
return await cache.wrap("matches+" + name, async () => {
try {
return await getFE("/player/" + name + "/matches/1.1.1.1");
} catch (err) {
return undefined;
}
}, { ttl: 60 });
}
// return single match
module.exports.getMatch = async function(id) {
return await cache.wrap("match+" + id, async () =>
getFE("/match/" + id),
{ ttl: 60 * 60 });
}
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