add ItemTag property book_generation

plugin/src/main/java/com/denizenscript/denizen/objects/properties/PropertyRegistry.java

@@ -104,6 +104,7 @@ public static void registermainProperties() {
         PropertyParser.registerProperty(ItemBaseColor.class, ItemTag.class);
         PropertyParser.registerProperty(ItemBlockMaterial.class, ItemTag.class);
         PropertyParser.registerProperty(ItemBook.class, ItemTag.class);
+        PropertyParser.registerProperty(ItemBookGeneration.class, ItemTag.class);
         PropertyParser.registerProperty(ItemDisplayname.class, ItemTag.class);
         PropertyParser.registerProperty(ItemDurability.class, ItemTag.class);
         PropertyParser.registerProperty(ItemCanDestroy.class, ItemTag.class);

plugin/src/main/java/com/denizenscript/denizen/objects/properties/item/ItemBookGeneration.java

@@ -0,0 +1,100 @@
+package com.denizenscript.denizen.objects.properties.item;
+
+import com.denizenscript.denizen.objects.ItemTag;
+import com.denizenscript.denizencore.objects.Mechanism;
+import com.denizenscript.denizencore.objects.ObjectTag;
+import com.denizenscript.denizencore.objects.core.ElementTag;
+import com.denizenscript.denizencore.objects.properties.Property;
+import com.denizenscript.denizencore.tags.Attribute;
+import org.bukkit.Material;
+import org.bukkit.inventory.meta.BookMeta;
+
+public class ItemBookGeneration implements Property {
+
+    public static boolean describes(ObjectTag item) {
+        return item instanceof ItemTag && ((ItemTag) item).getItemStack().getType() == Material.WRITTEN_BOOK;
+    }
+
+    public static ItemBookGeneration getFrom(ObjectTag _item) {
+        if (!describes(_item)) {
+            return null;
+        }
+        else {
+            return new ItemBookGeneration((ItemTag) _item);
+        }
+    }
+
+    public static final String[] handledTags = new String[] {
+            "book_generation"
+    };
+
+    public static final String[] handledMechs = new String[] {
+            "book_generation"
+    };
+
+    private ItemBookGeneration(ItemTag _item) {
+        item = _item;
+    }
+
+    ItemTag item;
+
+    @Override
+    public ObjectTag getObjectAttribute(Attribute attribute) {
+
+        if (attribute == null) {
+            return null;
+        }
+
+        // <--[tag]
+        // @attribute <ItemTag.book_generation>
+        // @returns ListTag
+        // @mechanism ItemTag.book_generation
+        // @group properties
+        // @description
+        // Returns the generation of the book (if any), as ORIGINAL, COPY_OF_ORIGINAL, COPY_OF_COPY, or TATTERED.
+        // -->
+        if (attribute.startsWith("book_generation")) {
+            BookMeta meta = (BookMeta) item.getItemMeta();
+            if (!meta.hasGeneration()) {
+                return null;
+            }
+            return new ElementTag(meta.getGeneration().name()).getObjectAttribute(attribute.fulfill(1));
+        }
+
+        return null;
+    }
+
+    @Override
+    public String getPropertyString() {
+        BookMeta meta = (BookMeta) item.getItemMeta();
+        if (!meta.hasGeneration()) {
+            return null;
+        }
+        return meta.getGeneration().name();
+    }
+
+    @Override
+    public String getPropertyId() {
+        return "book_generation";
+    }
+
+    @Override
+    public void adjust(Mechanism mechanism) {
+
+        // <--[mechanism]
+        // @object ItemTag
+        // @name book_generation
+        // @input ListTag
+        // @description
+        // Sets the generation of the book (if any), as ORIGINAL, COPY_OF_ORIGINAL, COPY_OF_COPY, or TATTERED.
+        // @tags
+        // <ItemTag.book_generation>
+        // -->
+        if (mechanism.matches("book_generation") && mechanism.requireEnum(false, BookMeta.Generation.values())) {
+            BookMeta meta = (BookMeta) item.getItemMeta();
+            meta.setGeneration(BookMeta.Generation.valueOf(mechanism.getValue().asString().toUpperCase()));
+            item.setItemMeta(meta);
+        }
+
+    }
+}

plugin/src/main/java/com/denizenscript/denizen/objects/properties/item/ItemHidden.java

@@ -14,7 +14,7 @@
 public class ItemHidden implements Property {
 
     public static boolean describes(ObjectTag item) {
-        // All items can have flags
+        // All items can have hides
         return item instanceof ItemTag && ((ItemTag) item).getItemStack().getType() != Material.AIR;
     }
 

plugin/src/main/java/com/denizenscript/denizen/scripts/commands/item/InventoryCommand.java

@@ -134,7 +134,7 @@ public InventoryCommand() {
     //
     // @Usage
     // Use to set a temporary flag on the player's held item.
-    // - inventory flag slot:<player.held_item_slot> flag my_target:<player.cursor_on> duration:1d
+    // - inventory flag slot:<player.held_item_slot> my_target:<player.cursor_on> duration:1d
     // -->
 
     private enum Action {OPEN, CLOSE, COPY, MOVE, SWAP, ADD, REMOVE, SET, KEEP, EXCLUDE, FILL, CLEAR, UPDATE, ADJUST, FLAG}