Change messaginging, allow adding more message types later

src/main.ts

@@ -7,7 +7,7 @@ import { createUrl, parseUrl } from './url/UrlHandler.js';
 import { wktToGeoJSON } from '@terraformer/wkt';
 import PPENHandler from './files/ppenhandler.js';
 import type { GeoJsonObject } from 'geojson';
-import type { SearchStatusMessage, StartSearchMessage } from './worker/messages.js';
+import type { FromWorkerMessage, ToWorkerMessage } from './worker/messages.js';
 
 // Outside influences
 let mapHandler = new MapHandler();
@@ -286,10 +286,13 @@ function updateState() {
 
 // In case of messages from the web worker, do work
 worker.onmessage = e => {
-	let message = e.data as SearchStatusMessage;
+	let fromWorker = e.data as FromWorkerMessage;
+	let message = fromWorker.message;
+	if (message.type == 'SearchFinished') {
 		state.foundPath = message.path;
 		state.calculating = false;
 		updateState();
+	}
 }
 
 function calculateRoute(): void {
@@ -326,9 +329,12 @@ function calculateRoute(): void {
 		weights.push(weightsRow);
 	}
 
-	let startSearchMessage: StartSearchMessage = {
+	let startSearchMessage: ToWorkerMessage = {
+		message: {
+			type: "StartSearch",
 			weights: weights
-	};
+		}
+	}
 
 	worker.postMessage(startSearchMessage);
 }

src/worker/messages.ts

@@ -1,7 +1,17 @@
 export interface StartSearchMessage {
+	type: 'StartSearch'
 	weights: number[][];
 }
 
-export interface SearchStatusMessage {
+export interface SearchFinishedMessage {
+	type: 'SearchFinished'
 	path: number[];
 }
+
+export interface ToWorkerMessage {
+	message: StartSearchMessage
+}
+
+export interface FromWorkerMessage {
+	message: SearchFinishedMessage
+}

src/worker/worker.ts

@@ -1,11 +1,13 @@
 import Module, { type MainModule } from '../../native/salesman.js';
-import type { SearchStatusMessage, StartSearchMessage } from "./messages"
+import type { FromWorkerMessage, ToWorkerMessage } from "./messages"
 
 let modulePromise: Promise<MainModule> = Module();
 
 onmessage = async (e) => {
 	let module = await modulePromise;
-	let message = e.data as StartSearchMessage;
+	let toWorker = e.data as ToWorkerMessage;
+	if (toWorker.message.type == 'StartSearch') {
+		let message = toWorker.message;
 		let nativeWeights = new module.Weights;
 		message.weights.forEach(weightsRow => {
 			let nativeWeightsRow = new module.WeightsRow();
@@ -25,8 +27,12 @@ onmessage = async (e) => {
 			}
 		};
 
-	let finishedMessage: SearchStatusMessage = {
+		let finishedMessage: FromWorkerMessage = {
+			message: {
+				type: 'SearchFinished',
 				path: foundPath
+			}
 		};
 		postMessage(finishedMessage);
+	}
 }