Adds a command for changing book generation, and updates README #5

src/main/java/net/knarcraft/bookswithoutborders/BooksWithoutBorders.java

@@ -17,6 +17,7 @@ import net.knarcraft.bookswithoutborders.command.CommandSave;
 import net.knarcraft.bookswithoutborders.command.CommandSavePublic;
 import net.knarcraft.bookswithoutborders.command.CommandSetAuthor;
 import net.knarcraft.bookswithoutborders.command.CommandSetBookPrice;
+import net.knarcraft.bookswithoutborders.command.CommandSetGeneration;
 import net.knarcraft.bookswithoutborders.command.CommandSetLore;
 import net.knarcraft.bookswithoutborders.command.CommandSetTitle;
 import net.knarcraft.bookswithoutborders.command.CommandUnSign;
@@ -167,6 +168,7 @@ public class BooksWithoutBorders extends JavaPlugin {
         registerCommand("booksWithoutBorders", new CommandBooksWithoutBorders());
         registerCommand("reload", new CommandReload());
         registerCommand("formatBook", new CommandFormat());
+        registerCommand("setBookGeneration", new CommandSetGeneration());
     }
 
     /**

src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java

@@ -84,6 +84,7 @@ public class CommandBooksWithoutBorders implements TabExecutor {
         showCommandInfo("saveBook", sender);
         showCommandInfo("savePublicBook", sender);
         showCommandInfo("setAuthor", sender);
+        showCommandInfo("setBookGeneration", sender);
         showCommandInfo("setBookPrice", sender);
         showCommandInfo("setLore", sender);
         showCommandInfo("setTitle", sender);

src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java

@@ -110,7 +110,8 @@ public class CommandCopy implements TabExecutor {
      */
     private boolean copyNextGenerationBook(BookMeta bookMeta, Player player, int copies) {
         //Copy the vanilla behavior of refusing copying any further
-        if (bookMeta.getGeneration() == BookMeta.Generation.COPY_OF_COPY) {
+        if (bookMeta.getGeneration() == BookMeta.Generation.COPY_OF_COPY ||
+                bookMeta.getGeneration() == BookMeta.Generation.TATTERED) {
             BooksWithoutBorders.sendErrorMessage(player, "You cannot copy this book any further. " +
                     "You must have the original or a direct copy.");
             return false;

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetGeneration.java

@@ -0,0 +1,74 @@
+package net.knarcraft.bookswithoutborders.command;
+
+import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
+import net.knarcraft.bookswithoutborders.utility.InventoryHelper;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Command executor for the set generation command
+ */
+public class CommandSetGeneration implements TabExecutor {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        if (!(sender instanceof Player player)) {
+            BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
+            return false;
+        }
+
+        if (InventoryHelper.notHoldingOneWrittenBookCheck(player, "You must be holding a written book to" +
+                " change its generation!", "You cannot change the generation of two books at once!")) {
+            return false;
+        }
+
+        if (args.length < 1) {
+            BooksWithoutBorders.sendErrorMessage(player, "You must specify the new generation for your book!");
+            return false;
+        }
+
+        BookMeta.Generation generation;
+        try {
+            generation = BookMeta.Generation.valueOf(args[0]);
+        } catch (IllegalArgumentException exception) {
+            BooksWithoutBorders.sendErrorMessage(player, "Invalid book generation specified!");
+            return false;
+        }
+
+        ItemStack heldBook = InventoryHelper.getHeldBook(player, true);
+        BookMeta bookMeta = (BookMeta) heldBook.getItemMeta();
+        if (bookMeta != null) {
+            bookMeta.setGeneration(generation);
+            heldBook.setItemMeta(bookMeta);
+            return true;
+        } else {
+            BooksWithoutBorders.sendErrorMessage(player, "Unable to get book metadata!");
+            return false;
+        }
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                                      @NotNull String[] args) {
+        if (args.length == 1) {
+            List<String> generations = new ArrayList<>();
+            for (BookMeta.Generation generation : BookMeta.Generation.values()) {
+                generations.add(generation.name());
+            }
+            return generations;
+        }
+        return new ArrayList<>();
+    }
+
+}

src/main/resources/config.yml

@@ -5,7 +5,7 @@ Options:
   Max_Number_of_Duplicates: 5
   # The separator used to separate the book title and the book author 
   Title-Author_Separator: ","
-  # The separator used to denote a new line in the book lore
+  # The separator used to denote a new line in the book/item lore
   Lore_line_separator: "~"
   # A list of books given to new players the first time they join the server
   Books_for_new_players: [ ]

src/main/resources/plugin.yml

@@ -53,6 +53,10 @@ commands:
     description: Encrypts the book the player is holding. "key" is required and can be any phrase or number excluding spaces. "style" is not required. Possible values are "DNA" or ""
     usage: /<command> <key> [encryption style]
     permission: bookswithoutborders.encrypt
+  setbookgeneration:
+    description: Sets the generation of the held book
+    usage: /<command> <generation>
+    permission: bookswithoutborders.setgeneration
   setbookprice:
     description: Sets the per-book-price to create a book via commands. If "Item", the item in the player's hand in the amount of [quantity] will be the price. If "Eco", a Vault based economy will be used for price. If neither <Item/Eco> or <quantity> are specified, the current price to create books will be removed.
     usage: /<command> <item/eco> <quantity>
@@ -115,6 +119,7 @@ permissions:
       bookswithoutborders.bypassbookprice: true
       bookswithoutborders.setbookprice: true
       bookswithoutborders.reload: true
+      bookswithoutborders.setgeneration: true
   bookswithoutborders.use:
     description: Allows player to use commands to save/load/delete in their personal directory
     children:
@@ -129,6 +134,7 @@ permissions:
       bookswithoutborders.setauthor: true
       bookswithoutborders.setlore: true
       bookswithoutborders.format: true
+      bookswithoutborders.setgeneration: true
   bookswithoutborders.format:
     description: Allows a player to format a book
   bookswithoutborders.save:
@@ -172,4 +178,6 @@ permissions:
   bookswithoutborders.setbookprice:
     description: Allows player to set the cost of creating a book
   bookswithoutborders.reload:
-    description: Allows player to reload this plugin
+    description: Allows player to reload this plugin
+  bookswithoutborders.setgeneration:
+    description: Allows player to change the generation of a book (Original, Copy, Copy of Copy)