1 files changed, 36 insertions, 8 deletions
diff --git a/packages/meshbay-client/src/main.js b/packages/meshbay-client/src/main.js
index 4c8707c..a2a7a86 100644
--- a/packages/meshbay-client/src/main.js
+++ b/packages/meshbay-client/src/main.js
@@ -20,8 +20,8 @@
 
 'use strict';
 
-const { app, BrowserWindow, dialog, ipcMain, Menu, protocol, safeStorage,
-        shell, Tray } =
+const { app, BrowserWindow, dialog, ipcMain, Menu, powerSaveBlocker, protocol,
+        safeStorage, shell, Tray } =
   require('electron');
 const { execFile, spawn } = require('node:child_process');
 const crypto = require('node:crypto');
@@ -2304,6 +2304,19 @@ function registerBridge() {
     return true;
   });
 
+  // The screen may sleep while music plays; the machine may not, or the
+  // connection to the node goes with it.
+  let playbackBlocker = null;
+  handle('playback:keep-alive', async (_event, on) => {
+    if (on === true && playbackBlocker === null) {
+      playbackBlocker = powerSaveBlocker.start('prevent-app-suspension');
+    } else if (on !== true && playbackBlocker !== null) {
+      powerSaveBlocker.stop(playbackBlocker);
+      playbackBlocker = null;
+    }
+    return true;
+  });
+
   handle('cast:status', async () => ({
     active: castRelay.active,
     url: castRelay.url,
@@ -2320,16 +2333,31 @@ function registerBridge() {
 
   handle('cast:devices', async () => castChromecast.devices());
 
-  handle('cast:chromecast:connect', async (_e, { deviceId, mediaUrl, subtitle }) => {
-    return castChromecast.connect(deviceId, mediaUrl,
-      subtitle === undefined ? castRelay.subtitle : subtitle);
+  // A whole file for the receiver — a photo, a music track — in three steps,
+  // so that a large one never crosses in a single message.
+  handle('cast:file:begin', async (_e, f) => castRelay.beginFile(f || {}));
+  handle('cast:file:write', async (_e, data) => castRelay.writeFile(Buffer.from(data)));
+  handle('cast:file:end', async () => castRelay.endFile());
+
+  // The relay's file is loaded as what the relay says it is, anything else as
+  // the stream; the page does not get to say which.
+  const loadOf = (mediaUrl, subtitle) => (
+    mediaUrl && mediaUrl === castRelay.fileUrl
+      ? { subtitle: null, file: { contentType: castRelay.fileType, meta: castRelay.fileMeta } }
+      : { subtitle: subtitle === undefined ? castRelay.subtitle : subtitle, file: null });
+
+  handle('cast:chromecast:connect', async (_e, { deviceId, mediaUrl, subtitle, startAt }) => {
+    const l = loadOf(mediaUrl, subtitle);
+    return castChromecast.connect(deviceId, mediaUrl, l.subtitle, l.file, l.file ? startAt : 0);
   });
 
-  handle('cast:chromecast:reload', async (_e, { mediaUrl, subtitle }) => {
-    return castChromecast.reload(mediaUrl,
-      subtitle === undefined ? castRelay.subtitle : subtitle);
+  handle('cast:chromecast:reload', async (_e, { mediaUrl, subtitle, startAt }) => {
+    const l = loadOf(mediaUrl, subtitle);
+    return castChromecast.reload(mediaUrl, l.subtitle, l.file, l.file ? startAt : 0);
   });
 
+  handle('cast:chromecast:seek', async (_e, seconds) => castChromecast.seek(seconds));
+
   // The player becomes a remote while casting: these drive the receiver.
   handle('cast:chromecast:pause', async () => castChromecast.pause());
   handle('cast:chromecast:play', async () => castChromecast.play());