Attempt to add channels. However it's broken now.

It shows "WebContents #1 called ipcRenderer.sendSync() with 'promised/call/experiment' channel without listeners.".

I tried to use some timeouts to see if it's related to that but it didn't get around this problem.

app/app.ts

@@ -177,9 +177,11 @@ document.addEventListener('DOMContentLoaded', async () => {
 
 	electronBridge.receive( 'experiment-then', ( res: any ) => console.log( 'independent listener: experiment-then', res ) );
 
-	electronBridge.experiment( 'experiment' )
-		.then( res => console.log('DOMContentLoaded: RESOLVED', res ) )
-		.catch( err => console.log('DOMContentLoaded: REJECTED', err ) );
+	setTimeout(() => {
+		electronBridge.experiment( 'experiment' )
+			.then( res => console.log('DOMContentLoaded: RESOLVED', res ) )
+			.catch( err => console.log('DOMContentLoaded: REJECTED', err ) );
+	}, 300);
 } );
 
 function addListeners() {

package.json

@@ -12,10 +12,12 @@
   "dependencies": {
     "electron": "^25.2.0",
     "electron-builder": "^24.4.0",
-    "open": "8.1.0"
+    "open": "8.1.0",
+    "uuid": "^9.0.0"
   },
   "devDependencies": {
     "@types/node": "^20.3.1",
+    "@types/uuid": "^9.0.2",
     "ts-node": "^10.9.1",
     "typescript": "^5.1.3"
   }

src/NoteQuickAdd.ts

@@ -11,6 +11,7 @@ import SetWorkspaceCommand from './Command/SetWorkspace';
 import CommandSet from './Command/CommandSet';
 import Config from './Config';
 import type { WorkspaceInfo } from './Config';
+import { v4 as uuid4 } from 'uuid';
 
 export type SetActiveWorkspaceParameter = number | 'next' | 'previous';
 
@@ -69,6 +70,10 @@ export default class NoteQuickAdd {
 				this.config = results[ 0 ];
 				this.electronApp = results[ 1 ];
 
+				console.log('waiting');
+				await wait( 1000 );
+				console.log('the wait is done!');
+
 				this.mainWindow = await this._createMainWindow();
 
 				this._initCommands();
@@ -117,22 +122,33 @@ export default class NoteQuickAdd {
 	}
 
 	public addPromisedIpcListener( channel : string, listener : any ) {
-		ipcMain.on( `promised/call/${ channel }`, ( event: any, ...args ) => {
+		const promiseChannel = `promised/call/${ channel }`;
+		console.log('adding a listener for ' + promiseChannel);
+
+		ipcMain.handle( promiseChannel, ( event: any, ...args ) => {
 			console.log( `MAIN: got promise request (${channel} channel)` );
 
 			const ret = listener( event, ...args );
+			const uniqueId = uuid4();
 
 			if ( !ret.then ) {
 				throw new Error( 'Promised IPC listener must return a promise' );
 			}
 
 			ret
 				.then( ( result : any ) => {
-					this.send( `promised/then/${ channel }`, result );
+
+					setTimeout(() => {
+						console.log('sending to ', `promised/then/${ channel }/${uniqueId}`);
+
+						this.send( `promised/then/${ channel }/${uniqueId}`, result );
+					}, 2000);
 				} )
 				.catch( ( error : any ) => {
-					this.send( `promised/catch/${ channel }`, error );
+					this.send( `promised/catch/${ channel }/${uniqueId}`, error );
 				} );
+
+			return uniqueId;
 		} );
 	}
 
@@ -247,4 +263,12 @@ export default class NoteQuickAdd {
 			console.log( 'Global shortcut registration failed' );
 		}
 	}
+}
+
+function wait( howLong = 1000 ) {
+	return new Promise<void>( ( resolve, reject ) => {
+		setTimeout( () => {
+			resolve();
+		}, howLong );
+	} )
 }

src/preload.js

@@ -32,14 +32,19 @@ contextBridge.exposeInMainWorld(
 			if ( !channel ) {
 				throw new Error( 'Missing channel name' );
 			}
-			const PROMISE_TIMEOUT_TIME = 30000;
+			const PROMISE_TIMEOUT_TIME = 5000;
+			// const PROMISE_TIMEOUT_TIME = 30000;
 
 			return new Promise( ( resolve, reject ) => {
-				console.log("frontend: sending a promise");
+				console.log("frontend: sending a promise", `promised/call/${ channel }`);
+
+				// const uniqueId = await ipcRenderer.invoke( `promised/call/${ channel }`, ...args );
+				const uniqueId = ipcRenderer.sendSync( `promised/call/${ channel }`, ...args );
+
 				// @todo add a timeout to reject the promise if it takes too long.
 				const cleanup = () => {
-					ipcRenderer.removeListener( `promised/then/${ channel }`, thenCallback );
-					ipcRenderer.removeListener( `promised/catch/${ channel }`, catchCallback );
+					ipcRenderer.removeListener( `promised/then/${ channel }/${ uniqueId }`, thenCallback );
+					ipcRenderer.removeListener( `promised/catch/${ channel }/${ uniqueId }`, catchCallback );
 					clearTimeout( timeoutHandler );
 				}
 
@@ -57,10 +62,12 @@ contextBridge.exposeInMainWorld(
 					reject( ...args );
 				};
 
-				ipcRenderer.once( `promised/then/${ channel }`, thenCallback );
-				ipcRenderer.once( `promised/catch/${ channel }`, catchCallback );
+				console.log( 'frontend, received id: ', uniqueId );
+
+				console.log('listening to ', `promised/then/${ channel }/${ uniqueId }`);
 
-				ipcRenderer.send( `promised/call/${ channel }`, ...args );
+				ipcRenderer.once( `promised/then/${ channel }/${ uniqueId }`, thenCallback );
+				ipcRenderer.once( `promised/catch/${ channel }/${ uniqueId }`, catchCallback );
 			} );
 		}
 	}

yarn.lock

@@ -268,6 +268,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/uuid@^9.0.2":
+  version "9.0.2"
+  resolved "https://registry.yarnpkg.com/@types/uuid/-/uuid-9.0.2.tgz#ede1d1b1e451548d44919dc226253e32a6952c4b"
+  integrity sha512-kNnC1GFBLuhImSnV7w4njQkUiJi0ZXUycu1rUaouPqiKlXkh77JKgdRnTAp1x5eBwcIwbtI+3otwzuIDEuDoxQ==
+
 "@types/verror@^1.10.3":
   version "1.10.6"
   resolved "https://registry.yarnpkg.com/@types/verror/-/verror-1.10.6.tgz#3e600c62d210c5826460858f84bcbb65805460bb"
@@ -2189,6 +2194,11 @@ util-deprecate@^1.0.1:
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==
 
+uuid@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-9.0.0.tgz#592f550650024a38ceb0c562f2f6aa435761efb5"
+  integrity sha512-MXcSTerfPa4uqyzStbRoTgt5XIe3x5+42+q1sDuy3R5MDk66URdLMOZe5aPX/SQd+kuYAh0FdP/pO28IkQyTeg==
+
 v8-compile-cache-lib@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz#6336e8d71965cb3d35a1bbb7868445a7c05264bf"