From 81ba9eb66f8284d8760012973f84cdbe617ceb94 Mon Sep 17 00:00:00 2001
From: pants <niklasjo2004@gmail.com>
Date: Mon, 21 Sep 2026 14:16:34 -0700
Subject: init

---
 search-engine/Book.java | 88 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 search-engine/Book.java

(limited to 'search-engine/Book.java')

diff --git a/search-engine/Book.java b/search-engine/Book.java
new file mode 100644
index 0000000..330035f
--- /dev/null
+++ b/search-engine/Book.java
@@ -0,0 +1,88 @@
+// Nik Johnson
+// TA: Zachary Bi
+// 4-2-2024
+
+import java.util.*;
+import java.text.DecimalFormat;
+
+// book object, which can have a title, authors, and a list of ratings
+public class Book implements Media {
+
+    private String title;
+    private String author;
+    private List<String> authors;
+    private List<Integer> ratings;
+
+    public Book(String title, String author) {
+        this.title = title;
+        this.author = author;
+    }
+    
+    public Book(String title, List<String> authors) {
+        this.title = title;
+        this.authors = authors;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+
+    public List<String> getArtists() {
+        List<String> artists = new ArrayList<>();
+        if (this.author != null) {
+            artists.add(this.author);
+        }
+        
+        if (this.authors != null) {
+            for (String author : authors) {
+                artists.add(author);
+            }
+        }
+        return artists;
+    }
+
+    public void addRating(int score) {
+        if (this.ratings == null) {
+            ratings = new ArrayList<>();
+        }
+        this.ratings.add(score);
+    }
+
+    public int getNumRatings() {
+
+        if (this.ratings == null) {
+            return 0;
+        }
+        
+        return this.ratings.size();
+    }
+
+    public double getAverageRating() {
+        if (this.ratings == null) {
+            return 0;
+        }
+        
+        int sum = 0;
+        for (int rating : ratings) {
+            sum += rating;
+        }
+
+        return (double)sum / this.ratings.size();
+    }
+
+    public String toString() {
+        String output = "";
+
+        output += this.title + " by " + this.getArtists() + ": ";
+        
+        DecimalFormat df = new DecimalFormat("#." + "0".repeat(2));
+
+        if (ratings != null) {
+            output += df.format(this.getAverageRating()) + " (" + (this.ratings.size())  + " ratings" + ")";
+            return output;
+        } 
+
+        return output + "No ratings yet!";
+    }
+}
+
-- 
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