Download File Option (#80)

This adds to the context menu to give the ability to download a file. It
also fixes a couple bugs and improves some formatting of the directory
view.

emain/emain.ts

@@ -1,6 +1,7 @@
 // Copyright 2024, Command Line Inc.
 // SPDX-License-Identifier: Apache-2.0
 
+import { getBackendHostPort } from "@/app/store/global";
 import * as keyutil from "@/util/keyutil";
 import * as electron from "electron";
 import fs from "fs";
@@ -421,6 +422,13 @@ electron.ipcMain.on("getPlatform", (event) => {
     event.returnValue = unamePlatform;
 });
 
+electron.ipcMain.on("download", (event, payload) => {
+    const window = electron.BrowserWindow.fromWebContents(event.sender);
+    const baseName = payload.filePath.split(/[\\/]/).pop();
+    const streamingUrl = getBackendHostPort() + "/wave/stream-file?path=" + encodeURIComponent(payload.filePath);
+    window.webContents.downloadURL(streamingUrl);
+});
+
 electron.ipcMain.on("getCursorPoint", (event) => {
     const window = electron.BrowserWindow.fromWebContents(event.sender);
     const screenPoint = electron.screen.getCursorScreenPoint();

emain/preload.ts

@@ -11,4 +11,5 @@ contextBridge.exposeInMainWorld("api", {
     openNewWindow: () => ipcRenderer.send("openNewWindow"),
     showContextMenu: (menu, position) => ipcRenderer.send("contextmenu-show", menu, position),
     onContextMenuClick: (callback) => ipcRenderer.on("contextmenu-click", callback),
+    downloadFile: (filePath) => ipcRenderer.send("download", { filePath }),
 });