tidal-hifi/src/scripts/express.js

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const express = require("express");
const { mediaInfo } = require("./mediaInfo");
const { store, settings } = require("./settings");
const globalEvents = require("./../constants/globalEvents");
const statuses = require("./../constants/statuses");
const expressModule = {};
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const fs = require("fs");
let expressInstance;
/**
* Function to enable tidal-hifi's express api
*/
expressModule.run = function(mainWindow) {
/**
* Shorthand to handle a fire and forget global event
* @param {*} res
* @param {*} action
*/
function handleGlobalEvent(res, action) {
mainWindow.webContents.send("globalEvent", action);
res.sendStatus(200);
}
const expressApp = express();
expressApp.get("/", (req, res) => res.send("Hello World!"));
expressApp.get("/current", (req, res) => res.json(mediaInfo));
expressApp.get("/image", (req, res) => {
var stream = fs.createReadStream(mediaInfo.icon);
stream.on("open", function() {
res.set("Content-Type", "image/png");
stream.pipe(res);
});
stream.on("error", function() {
res.set("Content-Type", "text/plain");
res.status(404).end("Not found");
});
});
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if (store.get(settings.playBackControl)) {
expressApp.get("/play", (req, res) => handleGlobalEvent(res, globalEvents.play));
expressApp.get("/pause", (req, res) => handleGlobalEvent(res, globalEvents.pause));
expressApp.get("/next", (req, res) => handleGlobalEvent(res, globalEvents.next));
expressApp.get("/previous", (req, res) => handleGlobalEvent(res, globalEvents.previous));
expressApp.get("/playpause", (req, res) => {
if (mediaInfo.status == statuses.playing) {
handleGlobalEvent(res, globalEvents.pause);
} else {
handleGlobalEvent(res, globalEvents.play);
}
});
}
if (store.get(settings.api)) {
let port = store.get(settings.apiSettings.port);
expressInstance = expressApp.listen(port, () => {});
expressInstance.on("error", function(e) {
let message = e.code;
if (e.code === "EADDRINUSE") {
message = `Port ${port} in use.`;
}
const { dialog } = require("electron");
dialog.showErrorBox("Api failed to start.", message);
});
} else {
expressInstance = undefined;
}
};
module.exports = expressModule;