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index.js
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index.js
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const express = require("express");
const axios = require("axios");
const get = require("lodash.get");
const app = express();
const port = 3000;
function getUtcDateToLocale(utcDate) {
var d = new Date(utcDate || Date.now());
return d.toLocaleDateString("en-CA", { timeZone: "America/Los_Angeles" });
}
function getToday() {
const today = new Date();
return getUtcDateToLocale(today);
}
function getYesterday() {
const today = new Date();
today.setDate(today.getDate() - 1);
return getUtcDateToLocale(today);
}
function success(_, res) {
res.sendFile(__dirname + "/svg/circle_green.svg");
}
function warning(_, res) {
res.sendFile(__dirname + "/svg/circle_yellow.svg");
}
function error(_, res) {
res.sendFile(__dirname + "/svg/circle_red.svg");
}
function getServers() {
return Array.from({ length: 5 })
.map((_, i) => process.env[`SERVER${i + 1}`])
.filter(Boolean);
}
async function checkUs(server) {
try {
await axios.get(`http://${server}`);
} catch {
return false;
}
return true;
}
async function getGameInfoFromMLBAM(date) {
const response = await axios.get("http://statsapi.mlb.com/api/v1/schedule", {
params: {
sportId: 1,
date,
hydrate: "team,linescore,game(content(summary,media(epg)))",
language: "en",
},
});
const now = new Date();
const games = get(response.data, "dates[0].games", []);
const [firstGame] = games;
const gamesFirstStreamIds = games.reduce((acc, game) => {
if (!get(game, "gameDate")) return acc;
var date = new Date(game.gameDate);
if (now < date) return acc;
const medias = get(game, "content.media.epg", []).find(
(m) => get(m, "title") === "MLBTV"
);
acc.push(get(medias, "items[0].id"));
return acc;
}, []);
return {
totalGames: games.length,
streamIds: gamesFirstStreamIds,
gameDate: get(firstGame, "gameDate"),
};
}
async function getStream(server, streamId, date) {
return await axios.get(
`http://${server}/getM3U8.php?league=MLB&id=${streamId}&cdn=akc&date=${date}`
);
}
async function getWorkingServer() {
const servers = getServers();
const results = await Promise.all(servers.map(checkUs));
return {
server: servers[results.findIndex(Boolean)],
isUp: results.includes(true),
};
}
const isStream = (stream) =>
typeof stream === "string" && stream.includes(".m3u8");
const hasQueryParam = (query, param) =>
query !== null && typeof query === "object" && query.hasOwnProperty(param);
app.get("/", (_, res) => {
res.sendStatus(200);
});
app.get("/us/game", async (req, res) => {
const { server } = await getWorkingServer();
if (!server) throw new Error();
try {
const { streamIds, gameDate } = await getGameInfoFromMLBAM(
req.query.date ||
(hasQueryParam(req.query, "yesterday") && getYesterday()) ||
getToday()
);
const date = getUtcDateToLocale(gameDate);
const responses = await Promise.all(
streamIds.map((streamId) => getStream(server, streamId, date))
);
const streams = responses.map((r) => r.data);
console.log(streams);
if (streams.every(isStream)) {
return success(req, res);
} else if (streams.some(isStream)) {
return warning(req, res);
}
throw new Error();
} catch {
return error(req, res);
}
});
app.get("/us/badge", async (req, res) => {
const { isUp } = await getWorkingServer();
const { data: badge } = await axios.get("https://img.shields.io/static/v1", {
params: {
label: "server",
style: "flat-square",
message: isUp ? "up" : "down",
color: isUp ? "success" : "critical",
},
});
res.type("image/svg+xml");
res.send(badge);
});
app.get("/us/ping", async (req, res) => {
const { isUp } = await getWorkingServer();
return isUp ? success(req, res) : error(req, res);
});
app.get("/mlbam/ping", async (req, res) => {
try {
const response = await axios.get(
"http://statsapi.mlb.com/api/v1/schedule",
{ params: { sportId: 1 } }
);
if (!response.data.copyright) {
throw new Error();
}
} catch {
return error(req, res);
}
return success(req, res);
});
app.get("/mlbam/schedule", async (req, res) => {
try {
const { totalGames } = await getGameInfoFromMLBAM(
req.query.date ||
(hasQueryParam(req.query, "yesterday") && getYesterday()) ||
getToday()
);
if (totalGames === 0) {
throw new Error();
}
} catch {
return error(req, res);
}
return success(req, res);
});
app.listen(process.env.PORT || port, () => {
console.log(`Listening at http://localhost:${port}`);
});