Refactor eval code to utilize more type safety

Author: leeyi45

src/commons/sagas/SafeEffects.ts

@@ -1,13 +1,18 @@
-import { ActionMatchingPattern } from '@redux-saga/types';
+import type { ActionMatchingPattern } from '@redux-saga/types';
 import * as Sentry from '@sentry/browser';
 import {
-  ActionPattern,
-  ForkEffect,
-  HelperWorkerParameters,
+  type ActionPattern,
+  type ForkEffect,
+  type HelperWorkerParameters,
+  select,
   takeEvery,
   takeLatest,
   takeLeading
 } from 'redux-saga/effects';
+import type { StoriesEnvState } from 'src/features/stories/StoriesTypes';
+
+import type { OverallState } from '../application/ApplicationTypes';
+import type { WorkspaceLocation, WorkspaceManagerState } from '../workspace/WorkspaceTypes';
 
 // it's not possible to abstract the two functions into HOF over takeEvery and takeLatest
 // without stepping out of TypeScript's type system because the type system does not support
@@ -95,3 +100,13 @@ export function safeTakeLeading<P extends ActionPattern, Fn extends (...args: an
   }
   return takeLeading<P, typeof wrappedWorker>(pattern, wrappedWorker, ...args);
 }
+
+export function* selectWorkspace<T extends WorkspaceLocation>(workspaceLocation: T) {
+  const workspace: WorkspaceManagerState[T] = yield select((state: OverallState) => state.workspaces[workspaceLocation])
+  return workspace
+}
+
+export function* selectStoryEnv(storyEnv: string) {
+  const workspace: StoriesEnvState = yield select((state: OverallState) => state.stories.envs[storyEnv])
+  return workspace
+}