Refactoring to watch WPT updates.

src/db/change-handler.ts

@@ -1,6 +1,46 @@
+import { getWpt } from '../db/wpt';
+import { returnAgain } from '../workers/dispatcher-worker';
 
-const changeHandler = (change: any) => {
-    console.log({caller: 'ChangeHandler', change});
+declare global {
+  var watches: Map<string, any>;
 }
 
-export default changeHandler;
+const methods = {
+  getWpt,
+};
+
+const changeHandler = async (change: any) => {
+  console.log({ caller: 'ChangeHandler', change });
+  const { id } = change.id;
+  if (!globalThis.watches) {
+    globalThis.watches = new Map();
+  }
+  const params = globalThis.watches.get(id);
+  if (params) {
+    const { method, _dispatchId, id, ...otherParams } = params;
+    const returnValue = await methods[<keyof typeof methods>method](params);
+    if (false) {
+      returnAgain(_dispatchId, returnValue);
+    }
+  }
+};
+
+export default changeHandler;
+
+export const getAndWatch = async (params: any) => {
+  const { method, _dispatchId, id, ...otherParams } = params;
+  if (!globalThis.watches) {
+    globalThis.watches = new Map();
+  }
+  globalThis.watches.set(id, params);
+  const returnValue = await methods[<keyof typeof methods>method](params);
+  return returnValue;
+};
+
+export const cancelWatch = (params: any) => {
+  if (!globalThis.watches) {
+    globalThis.watches = new Map();
+  }
+  const { id } = params;
+  globalThis.watches.delete(id);
+};

src/db/index.ts

@@ -99,12 +99,8 @@ export const initDb = async (params: any) => {
   console.log({ caller: 'initDb / before db.changes' });
 
   const changes = db
-    .changes({ since: 'now', live: true, include_docs: true })
+    .changes({ since: 'now', live: true, include_docs: false })
     .on('change', changeHandler)
-    // .on('change', (info: any) => {
-    //   console.log({ caller: 'changes / change', info });
-    //   changeHandler(info);
-    // })
     .on('complete', (info: any) => {
       console.log({ caller: 'changes / complete', info });
     })
@@ -112,7 +108,7 @@ export const initDb = async (params: any) => {
       console.log({ caller: 'changes / complete', error });
     });
 
-  console.log({ caller: 'initDb / back from db.changes', changes });
+  // console.log({ caller: 'initDb / back from db.changes', changes });
 
   //  changes.cancel();