feat: Initial clean release of CHM

packages/lib/services/ResourceEditWatcher/reducer.ts

@@ -0,0 +1,54 @@
+import { produce, Draft } from 'immer';
+import { defaultWindowId, stateUtils } from '../../reducer';
+
+export const defaultState = {
+	watchedResources: {},
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- Redux reducer composed across app-desktop/app-mobile with different state shapes; action types are heterogeneous
+const reducer = produce((draft: Draft<any>, action: any) => {
+	if (action.type.indexOf('RESOURCE_EDIT_WATCHER_') !== 0) return;
+
+	try {
+		switch (action.type) {
+
+		case 'RESOURCE_EDIT_WATCHER_SET':
+
+			draft.watchedResources[action.id] = {
+				id: action.id,
+				title: action.title,
+			};
+			break;
+
+		case 'RESOURCE_EDIT_WATCHER_REMOVE':
+			// RESOURCE_EDIT_WATCHER_REMOVE signals that a resource is no longer being watched.
+			// As such, it should be removed from all windows' resource lists:
+			for (const windowId in draft.backgroundWindows) {
+				// watchedResources is per-window only on desktop:
+				if ('watchedResources' in draft.backgroundWindows[windowId]) {
+					delete draft.backgroundWindows[windowId].watchedResources[action.id];
+				}
+			}
+
+			delete draft.watchedResources[action.id];
+			break;
+
+		case 'RESOURCE_EDIT_WATCHER_CLEAR': {
+			const windowState = stateUtils.windowStateById(draft, action.windowId ?? defaultWindowId);
+
+			// The window may have already been closed.
+			const windowExists = !!windowState;
+			if (windowExists) {
+				windowState.watchedResources = {};
+			}
+			break;
+		}
+
+		}
+	} catch (error) {
+		error.message = `In plugin reducer: ${error.message} Action: ${JSON.stringify(action)}`;
+		throw error;
+	}
+});
+
+export default reducer;