More fun with web workers...

src/db/index.ts

@@ -1,6 +1,10 @@
 import _ from 'lodash';
+import PouchDB from 'pouchdb';
+import PouchDBFind from 'pouchdb-find';
 import uri from '../lib/ids';
 
+PouchDB.plugin(PouchDBFind);
+
 const dbDefinitionId = uri('dbdef', {});
 
 const currentDbDefinition = {
@@ -9,7 +13,19 @@ const currentDbDefinition = {
   def: { version: '0.000001' },
 };
 
-export const initDb = async (db: any, setDbReady?: any) => {
+declare global {
+  var db: any;
+  var dbReady: boolean;
+}
+
+export const initDb = async (params: any) => {
+  if (globalThis.db === undefined) {
+    globalThis.db = new PouchDB('dyomedea', {
+      auto_compaction: true,
+      revs_limit: 10,
+    });
+  }
+  const db = globalThis.db;
   var previousDbDefinition = {
     _id: dbDefinitionId,
     type: dbDefinitionId,
@@ -81,7 +97,7 @@ export const initDb = async (db: any, setDbReady?: any) => {
     }
   }
 
-  if (setDbReady !== undefined) setDbReady(true);
+  globalThis.dbReady = true;
 
   /*   const indexes = await db.getIndexes();
   console.log(`indexes: ${JSON.stringify(indexes)}`);

src/workers/dispatcher-main.test.js

@@ -1,6 +1,4 @@
-import dispatch, { init, worker } from './dispatcher-main';
+import dispatch, { init, worker } from './dispatcher-main'
-
-var mockPostMessage = jest.fn();
 
 jest.mock('./get-worker', () => ({
   getWorker: () => ({

src/workers/dispatcher-main.ts

@@ -11,7 +11,7 @@ export const init = () => {
 
   worker = getWorker();
 
-  console.log(`worker: ${worker}`)
+  console.log(`worker: ${worker}`);
 
   worker.port.onmessage = (event: any) => {
     const { id, payload } = event.data;

src/workers/dispatcher-worker.test.js

@@ -14,6 +14,9 @@ describe('The dispatcher-worker ', () => {
   });
   test('receives a ping and sends a pong', () => {
     port.onmessage({ data: { id: 5, payload: 'ping' } });
-    expect(port.postMessage).toBeCalledWith({ id: 5, payload: '"ping" pong' });
+    expect(port.postMessage).toBeCalledWith({
+      id: 5,
+      payload: 'unknownAction',
+    });
   });
 });

src/workers/dispatcher-worker.ts

@@ -1,12 +1,23 @@
+import { initDb } from '../db';
+
 const self = globalThis as unknown as SharedWorkerGlobalScope;
 
+const actions = { initDb };
+
 self.onconnect = function (e) {
   var port = e.ports[0];
 
-  port.onmessage = function (e) {
+  port.onmessage = async function (e) {
-    console.log(`Worker received ${JSON.stringify(e)}`);
+    console.log(`Worker received ${JSON.stringify(e.data)}`);
     const { id, payload } = e.data;
-    port.postMessage({ id: id, payload: `${JSON.stringify(payload)} pong` });
+    console.log(`payload.action in actions: ${payload.action in actions}`);
+    var returnValue: any = 'unknownAction';
+    if (payload.action in actions) {
+      returnValue = await actions[<keyof typeof actions>payload.action](
+        payload.params
+      );
+    }
+    port.postMessage({ id: id, payload: returnValue });
   };
 };