transitioning to ts

src/scripts/express.ts

@@ -0,0 +1,65 @@
+import { BrowserWindow } from "electron";
+import express, { Response } from "express";
+import fs from "fs";
+const { mediaInfo } = require("./mediaInfo");
+const { store, settings } = require("./settings");
+const globalEvents = require("./../constants/globalEvents");
+const statuses = require("./../constants/statuses");
+
+/**
+ * Function to enable tidal-hifi's express api
+ */
+
+// expressModule.run = function (mainWindow)
+export const startExpress = (mainWindow: BrowserWindow) => {
+  /**
+   * Shorthand to handle a fire and forget global event
+   * @param {*} res
+   * @param {*} action
+   */
+  function handleGlobalEvent(res: Response, action: any) {
+    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, artist: mediaInfo.artists }));
+  expressApp.get("/image", (req, res) => {
+    const 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");
+    });
+  });
+
+  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);
+      }
+    });
+  }
+
+  let port = store.get(settings.apiSettings.port);
+
+  const expressInstance = expressApp.listen(port, "127.0.0.1", () => {});
+  expressInstance.on("error", function (e: { code: string }) {
+    let message = e.code;
+    if (e.code === "EADDRINUSE") {
+      message = `Port ${port} in use.`;
+    }
+    const { dialog } = require("electron");
+    dialog.showErrorBox("Api failed to start.", message);
+  });
+};