02-actions complete

src/app/books/actions/books-page.actions.ts

@@ -1,2 +1,46 @@
 import { Book } from "src/app/shared/models/book.model";
 import { Action } from "@ngrx/store";
+
+export enum BooksActionTypes {
+  SelectBook = '[Books Page] Select Book',
+  ClearSelectedBook = '[Books Page] Clear Selected Book',
+  CreateBook = '[Books Page] Create Book',
+  UpdateBook = '[Books Page] Update Book',
+  DeleteBook = '[Books Page] Delete Book'
+}
+
+export class SelectBook implements Action {
+  readonly type = BooksActionTypes.SelectBook;
+
+  constructor(public bookId: string) {}
+}
+
+export class ClearSelectedBook implements Action {
+  readonly type = BooksActionTypes.ClearSelectedBook;
+}
+
+export class CreateBook implements Action {
+  readonly type = BooksActionTypes.CreateBook;
+
+  constructor(public book: Book) {}
+}
+
+export class UpdateBook implements Action {
+  readonly type = BooksActionTypes.UpdateBook;
+
+  constructor(public book: Book) {}
+}
+
+export class DeleteBook implements Action {
+  readonly type = BooksActionTypes.DeleteBook;
+
+  constructor(public book: Book) {}
+}
+
+export type BooksActions = 
+  | SelectBook
+  | ClearSelectedBook
+  | CreateBook
+  | UpdateBook
+  | DeleteBook
+;

src/app/books/components/books-page/books-page.component.ts

@@ -5,7 +5,8 @@ import { Book } from 'src/app/shared/models/book.model';
 import { Observable } from 'rxjs';
 import { Store, select } from '@ngrx/store';
 import * as fromRoot from 'src/app/shared/state';
-import { map } from 'rxjs/operators';
+import { map, tap } from 'rxjs/operators';
+import { BooksPageActions } from '../../actions';
 
 @Component({
   selector: 'app-books',
@@ -22,7 +23,8 @@ export class BooksPageComponent implements OnInit {
   ) {
     this.books$ = this.store.pipe(
       select(state => state.books),
-      map(booksState => booksState.books)
+      map(booksState => booksState.books),
+      tap(books => this.updateTotals(books))
     );
   }
 
@@ -42,7 +44,7 @@ export class BooksPageComponent implements OnInit {
   }
 
   onSelect(book: Book) {
-    this.store.dispatch({ type: 'select', bookId: book.id });
+    this.store.dispatch(new BooksPageActions.SelectBook(book.id));
     this.currentBook = book;
   }
 
@@ -51,7 +53,7 @@ export class BooksPageComponent implements OnInit {
   }
 
   removeSelectedBook() {
-    this.store.dispatch({ type: 'clear select' });
+    this.store.dispatch(new BooksPageActions.ClearSelectedBook());
     this.currentBook = null;
   }  
 
@@ -64,14 +66,14 @@ export class BooksPageComponent implements OnInit {
   }
 
   saveBook(book: Book) {
-    this.store.dispatch({ type: 'create', book });
+    this.store.dispatch(new BooksPageActions.CreateBook(book));
   }
 
   updateBook(book: Book) {
-    this.store.dispatch({ type: 'update', book });
+    this.store.dispatch(new BooksPageActions.UpdateBook(book));
   }
 
   onDelete(book: Book) {
-    this.store.dispatch({ type: 'delete', book });
+    this.store.dispatch(new BooksPageActions.DeleteBook(book));
   }
 }

src/app/shared/state/books.reducer.ts

@@ -1,5 +1,7 @@
 import { createEntityAdapter, EntityAdapter, EntityState } from '@ngrx/entity';
 import { Book } from 'src/app/shared/models/book.model';
+import { BooksPageActions } from 'src/app/books/actions';
+
 
 const initialBooks: Book[] = [
   {
@@ -38,29 +40,29 @@ export const initialState = {
   books: initialBooks
 };
 
-export function reducer(state = initialState, action: any): State {
+export function reducer(state = initialState, action: BooksPageActions.BooksActions): State {
   switch(action.type) {
-    case 'select':
+    case BooksPageActions.BooksActionTypes.SelectBook:
       return {
         activeBookId: action.bookId,
         books: state.books
       };
-    case 'clear select':
+    case BooksPageActions.BooksActionTypes.ClearSelectedBook:
       return {
         activeBookId: null,
         books: state.books
       };
-    case 'create':
+    case BooksPageActions.BooksActionTypes.CreateBook:
       return {
         activeBookId: state.activeBookId,
         books: createBook(state.books, action.book)
       };
-    case 'update':
+    case BooksPageActions.BooksActionTypes.UpdateBook:
       return {
         activeBookId: state.activeBookId,
         books: updateBook(state.books, action.book)
       };
-    case 'delete':
+    case BooksPageActions.BooksActionTypes.DeleteBook:
       return {
         activeBookId: null,
         books: deleteBook(state.books, action.book)