From 807b98dfd653af0c1e7bcc0c7d2252f6570804ef Mon Sep 17 00:00:00 2001
From: AdithyakrishnaV <adithyakr007@gmail.com>
Date: Fri, 2 Jul 2021 08:21:53 +0530
Subject: [PATCH] add  operator

---
 index.js | 74 +++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 44 insertions(+), 30 deletions(-)

diff --git a/index.js b/index.js
index c25323e..25c343e 100644
--- a/index.js
+++ b/index.js
@@ -358,52 +358,66 @@ Access           Public
 Parameter        isbn
 Method           DELETE
 */
-booky.delete("/book/delete/:isbn", (req, res) => {
-   
-    const updatedBookDatabase = database.books.filter(
-      (book) => book.ISBN !== req.params.isbn
-    );
+booky.delete("/book/delete/:isbn", async (req, res) => {
 
-    database.books = updatedBookDatabase;
-    return res.json({ books: database.books });
+    const updatedBookDatabase = await BookModel.findOneAndDelete(
+        {
+            ISBN: req.params.isbn
+        }
+    );
+   
+    // const updatedBookDatabase = database.books.filter(
+    //   (book) => book.ISBN !== req.params.isbn
+    // );
+    // database.books = updatedBookDatabase;
+    return res.json({ books: updatedBookDatabase });
 });
 
  /* 
 Route            /book/delete/author
-Discription      Delete a book from publication
+Discription      Delete a author from book
 Access           Public
 Parameter        isbn, author id
 Method           DELETE
 */
-booky.delete("/book/delete/author/:isbn/:authorId", (req, res) => {
-    //update book database
-    database.books.forEach((book) => {
-        if(book.ISBN === req.params.isbn) {
-            const newAuthorList = book.authors.filter(
-                (author) => author !== parseInt(req.params.authorId)
-            );//convert string to no
+booky.delete("/book/delete/author/:isbn/:authorId", async (req, res) => {
 
-            book.authors = newAuthorList;
-            return;
-        }   
-    });
+    //update book database
+      
+    const updatedBook = await BookModel.findOneAndUpdate(
+        {
+            ISBN: req.params.isbn
+        },
+        {
+            $pull:{
+                authors: parseInt(req.params.authorId)
+            }
+        },
+        {
+            new: true
+        }
+    );
     
     //update author database
-    database.author.forEach((author) => {
-        if(author.id === parseInt(req.params.authorId)) {
-            const newBooksList = author.books.filter(
-                (book) => book !== req.params.isbn
-            );
-        
-          author.books = newBooksList;
-          return;
+
+    const updatedAuthor = await AuthorModel.findOneAndUpdate(
+        {
+            id: parseInt(req.params.authorId)
+        },
+        {
+            $pull: {
+                books: req.params.isbn
+            }
+        },
+        {
+            new: true
         }
-    });
+    );
 
     return res.json({ 
         message: "author was deleted",
-        book: database.books, 
-        author: database.author, 
+        book: updatedBook, 
+        author: updatedAuthor, 
     })
 });