updated main.js with library and book code

main.js

@@ -1 +1,83 @@
-// write your code here to make the tests pass
+var Library = function() {
+    var books = [];
+
+    var addBook = function(book) {
+      books.push(book);
+    };
+
+    var checkOutBook = function (book) {
+      var search_book = findBook(book);
+
+        if(search_book){
+            if(!search_book.getAttribute('checkedOut')) {
+
+            search_book.setAttribute('checkedOut', true);
+            }
+
+            console.log("Book is already checked out");
+        }
+
+        console.log("Book does not exist");
+    }
+
+    var returnBook = function (book) {
+      var search_book = findBook(book);
+
+        if(search_book){
+            if(search_book.getAttribute('checkedOut')) {
+
+            search_book.setAttribute('checkedOut', false);
+            }
+
+            console.log("Book is already checked in?");
+        }
+
+        console.log("Book does not exist");
+      }
+
+    //still not sure if this would actually find a matching books
+    //if the book object passed in is a different object than the
+    //original added book
+    var findBook = function (book) {
+        var search_title = book.getAttribute('title');
+        var search_author = book.getAttribute('author');
+        for(var i = 0; i < books.length; i++){
+          if(books[i].getAttribute('title') == search_title
+            && books[i].getAttribute('author') == search_author)
+          {
+            return books[i];
+          }
+        }
+    }
+
+    return {
+      addBook: addBook,
+      checkOutBook: checkOutBook,
+      returnBook: returnBook
+    };
+  };
+
+  var Book = function(title, author) {
+    var attributes = {
+      title: title,
+      author: author,
+      checkedOut: false
+    };
+
+    var getAttribute = function(attribute) {
+      if (attributes.hasOwnProperty(attribute)){
+        return attributes[attribute];
+      }
+    };
+
+    var setAttribute = function(attribute, value) {
+      if (attributes.hasOwnProperty(attribute)){
+        attributes[attribute] = value;
+      }
+    };
+
+    return {
+      getAttribute: getAttribute,
+      setAttribute: setAttribute
+    };
+  };