Moves more functionality to the encryption helper

src/main/java/net/knarcraft/bookswithoutborders/utility/EncryptionHelper.java

@@ -1,5 +1,15 @@
 package net.knarcraft.bookswithoutborders.utility;
 
+import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
+import net.knarcraft.bookswithoutborders.EncryptionStyle;
+import net.knarcraft.bookswithoutborders.GenenCrypt;
+import net.knarcraft.bookswithoutborders.SubstitutionCipher;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.meta.BookMeta;
+
+import java.util.ArrayList;
+import java.util.List;
+
 public class EncryptionHelper {
 
     /**
@@ -15,4 +25,35 @@ public class EncryptionHelper {
         return integerKey.toString();
     }
 
+    /**
+     * Encrypts the pages of a book
+     * @param book <p>The book to encrypt</p>
+     * @param style <p>The encryption style to use</p>
+     * @param integerKey <p>The encryption key to use</p>
+     * @param player <p>The player trying to encrypt a book</p>
+     * @return <p>The pages of the book in encrypted form</p>
+     */
+    public static List<String> encryptBookPages(BookMeta book, EncryptionStyle style, String integerKey, Player player) {
+        List<String> encryptedPages = new ArrayList<>();
+        //Scramble the book's contents
+        if (style == EncryptionStyle.DNA) {
+            //Encrypt the pages using gene-based encryption
+            GenenCrypt gc = new GenenCrypt(integerKey);
+            for (int x = 0; x < book.getPages().size(); x++) {
+                encryptedPages.add(gc.encrypt(book.getPage(x + 1)));
+            }
+            return encryptedPages;
+        } else if (style == EncryptionStyle.SUBSTITUTION) {
+            //Encrypt the pages using a substitution cipher
+            SubstitutionCipher sc = new SubstitutionCipher();
+            for (int x = 0; x < book.getPages().size(); x++) {
+                encryptedPages.add(sc.encrypt(book.getPage(x + 1), integerKey));
+            }
+            return encryptedPages;
+        } else {
+            BooksWithoutBorders.sendErrorMessage(player, "Invalid encryption style encountered!");
+            return null;
+        }
+    }
+
 }