Add item dropping codecs.

src/org/apollo/game/event/Event.java

@@ -7,4 +7,4 @@ package org.apollo.game.event;
  */
 public abstract class Event {
 
-}
+}

src/org/apollo/game/event/impl/PositionEvent.java

@@ -0,0 +1,53 @@
+package org.apollo.game.event.impl;
+
+import org.apollo.game.event.Event;
+import org.apollo.game.model.Position;
+
+/**
+ * An {@link Event} which tells the client to focus on a specific {@link Position} (on which an action should be
+ * performed).
+ * 
+ * @author Chris Fletcher
+ */
+public final class PositionEvent extends Event {
+
+	/**
+	 * The base position.
+	 */
+	private final Position base;
+
+	/**
+	 * The target position.
+	 */
+	private final Position position;
+
+	/**
+	 * Creates a new focus position event.
+	 * 
+	 * @param base The base from which the position is being focused on.
+	 * @param position The position to focus on.
+	 */
+	public PositionEvent(Position base, Position position) {
+		this.base = base;
+		this.position = position;
+	}
+
+	/**
+	 * Gets the base position.
+	 * 
+	 * @return The position.
+	 */
+	public Position getBase() {
+		return base;
+	}
+
+	/**
+	 * Gets the position to focus on.
+	 * 
+	 * @return The target position.
+	 */
+	public Position getPosition() {
+		return position;
+	}
+
+}

src/org/apollo/game/event/impl/SetTileItemEvent.java

@@ -0,0 +1,145 @@
+package org.apollo.game.event.impl;
+
+import org.apollo.game.event.Event;
+import org.apollo.game.model.Item;
+import org.apollo.game.model.def.ItemDefinition;
+
+/**
+ * An {@link Event} sent to tell the client to display an item on a tile.
+ * 
+ * @author Major
+ */
+public final class SetTileItemEvent extends Event {
+
+	/**
+	 * The {@link Item}.
+	 */
+	private final Item item;
+
+	/**
+	 * The offset from the client's base position.
+	 */
+	private final int positionOffset;
+
+	/**
+	 * The previous amount of the item (if it is being updated).
+	 */
+	private final int previousAmount;
+
+	/**
+	 * Indicates whether the item is stackable.
+	 */
+	private final boolean stackable;
+
+	/**
+	 * Indicates whether an existing item is being updated.
+	 */
+	private final boolean updating;
+
+	/**
+	 * Creates a new event that will remove the item with the specified id from the tile.
+	 * 
+	 * @param id The id of the item.
+	 */
+	public SetTileItemEvent(int id) {
+		this(id, 0, ItemDefinition.lookup(id).isStackable(), false, 0, 0);
+	}
+
+	/**
+	 * Creates a new event that will add an item with the specified id and amount to the tile.
+	 * 
+	 * @param id The id of the item.
+	 * @param amount The amount of the item.
+	 */
+	public SetTileItemEvent(int id, int amount) {
+		this(id, amount, ItemDefinition.lookup(id).isStackable(), false, 0, 0);
+	}
+
+	/**
+	 * Creates a new set tile item event.
+	 * 
+	 * @param id The id of the item.
+	 * @param amount The new amount of the item.
+	 * @param stackable Whether the item is stackable or not.
+	 * @param positionOffset The offset from the client's base position.
+	 * @param updating If the item is being updated or not.
+	 * @param previousAmount The previous amount of the item.
+	 */
+	public SetTileItemEvent(int id, int amount, boolean stackable, boolean updating, int previousAmount,
+			int positionOffset) {
+		if (id < 0 || amount < 0 || previousAmount < 0) {
+			throw new IllegalArgumentException("The id, amount, and previous amount must be 0 or greater.");
+		}
+		this.item = new Item(id, amount);
+		this.stackable = stackable;
+		this.updating = updating;
+		this.previousAmount = previousAmount;
+		this.positionOffset = positionOffset;
+	}
+
+	/**
+	 * Creates a new event that updates the previous amount of the item.
+	 * 
+	 * @param id The id of the item.
+	 * @param amount The amount of the item.
+	 * @param previousAmount The previous amount of the item.
+	 */
+	public SetTileItemEvent(int id, int amount, int previousAmount) {
+		this(id, amount, true, true, previousAmount, 0);
+	}
+
+	/**
+	 * Gets the amount of the item.
+	 * 
+	 * @return The amount.
+	 */
+	public int getAmount() {
+		return item.getAmount();
+	}
+
+	/**
+	 * Gets the id of the item.
+	 * 
+	 * @return The item.
+	 */
+	public int getId() {
+		return item.getId();
+	}
+
+	/**
+	 * Gets the offset from the client's base position.
+	 * 
+	 * @return The offset.
+	 */
+	public int getPositionOffset() {
+		return positionOffset;
+	}
+
+	/**
+	 * Gets the previous amount of the item.
+	 * 
+	 * @return The previous amount.
+	 */
+	public int getPreviousAmount() {
+		return previousAmount;
+	}
+
+	/**
+	 * Indicates whether this item is stackable or not.
+	 * 
+	 * @return {@code true} if the item is stackable, otherwise {@code false}.
+	 */
+	public boolean isStackable() {
+		return stackable;
+	}
+
+	/**
+	 * Indicates whether this item is being updated or not.
+	 * 
+	 * @return {@code true} if the item is being updated, otherwise {@code false}.
+	 */
+	public boolean isUpdating() {
+		return updating;
+	}
+
+}

src/org/apollo/game/event/impl/TakeTileItemEvent.java

@@ -0,0 +1,52 @@
+package org.apollo.game.event.impl;
+
+import org.apollo.game.event.Event;
+import org.apollo.game.model.Position;
+
+/**
+ * An {@link Event} sent by the client indicating a request to pick up an item on a tile.
+ * 
+ * @author Major
+ */
+public final class TakeTileItemEvent extends Event {
+
+	/**
+	 * The id of the item.
+	 */
+	private final int id;
+
+	/**
+	 * The position of the tile.
+	 */
+	private final Position position;
+
+	/**
+	 * Creates a new take tile item event.
+	 * 
+	 * @param id The id of the item.
+	 * @param position The position of the tile.
+	 */
+	public TakeTileItemEvent(int id, Position position) {
+		this.id = id;
+		this.position = position;
+	}
+
+	/**
+	 * Gets the id of the item.
+	 * 
+	 * @return The id.
+	 */
+	public int getId() {
+		return id;
+	}
+
+	/**
+	 * Gets the position of the tile.
+	 * 
+	 * @return The position.
+	 */
+	public Position getPosition() {
+		return position;
+	}
+
+}

src/org/apollo/net/release/r317/PositionEventEncoder.java

@@ -0,0 +1,29 @@
+package org.apollo.net.release.r317;
+
+import org.apollo.game.event.impl.PositionEvent;
+import org.apollo.game.model.Position;
+import org.apollo.net.codec.game.DataTransformation;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketBuilder;
+import org.apollo.net.release.EventEncoder;
+
+/**
+ * An {@link EventEncoder} for the {@link PositionEvent}.
+ * 
+ * @author Chris Fletcher
+ */
+final class PositionEventEncoder extends EventEncoder<PositionEvent> {
+
+	@Override
+	public GamePacket encode(PositionEvent event) {
+		GamePacketBuilder builder = new GamePacketBuilder(85);
+		Position base = event.getBase(), pos = event.getPosition();
+
+		builder.put(DataType.BYTE, DataTransformation.NEGATE, pos.getLocalY(base));
+		builder.put(DataType.BYTE, DataTransformation.NEGATE, pos.getLocalX(base));
+
+		return builder.toGamePacket();
+	}
+
+}

src/org/apollo/net/release/r317/Release317.java

@@ -10,8 +10,10 @@ import org.apollo.game.event.impl.NpcSynchronizationEvent;
 import org.apollo.game.event.impl.OpenInterfaceEvent;
 import org.apollo.game.event.impl.OpenInterfaceSidebarEvent;
 import org.apollo.game.event.impl.PlayerSynchronizationEvent;
+import org.apollo.game.event.impl.PositionEvent;
 import org.apollo.game.event.impl.RegionChangeEvent;
 import org.apollo.game.event.impl.ServerMessageEvent;
+import org.apollo.game.event.impl.SetTileItemEvent;
 import org.apollo.game.event.impl.SetWidgetItemModelEvent;
 import org.apollo.game.event.impl.SetWidgetModelAnimationEvent;
 import org.apollo.game.event.impl.SetWidgetNpcModelEvent;
@@ -122,6 +124,7 @@ public final class Release317 extends Release {
 		register(72, new FirstNpcActionEventDecoder());
 		register(155, new SecondNpcActionEventDecoder());
 		register(17, new ThirdNpcActionEventDecoder());
+		register(236, new TakeTileItemEventDecoder());
 
 		// register encoders
 		register(IdAssignmentEvent.class, new IdAssignmentEventEncoder());
@@ -146,6 +149,8 @@ public final class Release317 extends Release {
 		register(SetWidgetModelAnimationEvent.class, new SetWidgetModelAnimationEventEncoder());
 		register(ConfigEvent.class, new ConfigEventEncoder());
 		register(DisplayTabInterfaceEvent.class, new DisplayTabInterfaceEventEncoder());
+		register(SetTileItemEvent.class, new SetTileItemEventEncoder());
+		register(PositionEvent.class, new PositionEventEncoder());
 	}
 
 }

src/org/apollo/net/release/r317/SetTileItemEventEncoder.java

@@ -0,0 +1,43 @@
+package org.apollo.net.release.r317;
+
+import org.apollo.game.event.impl.SetTileItemEvent;
+import org.apollo.net.codec.game.DataOrder;
+import org.apollo.net.codec.game.DataTransformation;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketBuilder;
+import org.apollo.net.release.EventEncoder;
+
+/**
+ * An {@link EventEncoder} for the {@link SetTileItemEvent}.
+ * 
+ * @author Major
+ */
+public class SetTileItemEventEncoder extends EventEncoder<SetTileItemEvent> {
+
+	@Override
+	public GamePacket encode(SetTileItemEvent event) {
+		GamePacketBuilder builder = null;
+		if (event.getAmount() == 0) { // remove the item.
+			builder = new GamePacketBuilder(156);
+
+			builder.put(DataType.BYTE, DataTransformation.ADD, event.getPositionOffset());
+			builder.put(DataType.SHORT, event.getId());
+		} else if (!event.isUpdating()) { // sending a new item
+			builder = new GamePacketBuilder(44);
+
+			builder.put(DataType.SHORT, DataOrder.LITTLE, DataTransformation.ADD, event.getId());
+			builder.put(DataType.SHORT, event.getAmount());
+			builder.put(DataType.BYTE, event.getPositionOffset());
+		} else { // updating an already displayed item
+			builder = new GamePacketBuilder(84);
+
+			builder.put(DataType.BYTE, event.getPositionOffset());
+			builder.put(DataType.SHORT, event.getId());
+			builder.put(DataType.SHORT, event.getPreviousAmount());
+			builder.put(DataType.SHORT, event.getAmount());
+		}
+		return builder.toGamePacket();
+	}
+
+}

src/org/apollo/net/release/r317/TakeTileItemEventDecoder.java

@@ -0,0 +1,27 @@
+package org.apollo.net.release.r317;
+
+import org.apollo.game.event.impl.TakeTileItemEvent;
+import org.apollo.game.model.Position;
+import org.apollo.net.codec.game.DataOrder;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketReader;
+import org.apollo.net.release.EventDecoder;
+
+/**
+ * An {@link EventDecoder} for the {@link TakeTileItemEvent}.
+ * 
+ * @author Major
+ */
+public class TakeTileItemEventDecoder extends EventDecoder<TakeTileItemEvent> {
+
+	@Override
+	public TakeTileItemEvent decode(GamePacket packet) {
+		GamePacketReader reader = new GamePacketReader(packet);
+		int y = (int) reader.getUnsigned(DataType.SHORT, DataOrder.LITTLE);
+		int id = (int) reader.getUnsigned(DataType.SHORT);
+		int x = (int) reader.getUnsigned(DataType.SHORT, DataOrder.LITTLE);
+		return new TakeTileItemEvent(id, new Position(x, y));
+	}
+
+}

src/org/apollo/net/release/r377/PositionEventEncoder.java

@@ -0,0 +1,32 @@
+package org.apollo.net.release.r377;
+
+import org.apollo.game.event.impl.PositionEvent;
+import org.apollo.game.model.Position;
+import org.apollo.net.codec.game.DataTransformation;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketBuilder;
+import org.apollo.net.release.EventEncoder;
+
+/**
+ * An {@link EventEncoder} for the {@link PositionEvent}.
+ * 
+ * @author Chris Fletcher
+ * @author Major
+ */
+final class PositionEventEncoder extends EventEncoder<PositionEvent> {
+
+	@Override
+	public GamePacket encode(PositionEvent event) {
+		GamePacketBuilder builder = new GamePacketBuilder(75);
+		Position base = event.getBase(), pos = event.getPosition();
+
+		int x = pos.getLocalX(base);
+		builder.put(DataType.BYTE, DataTransformation.NEGATE, x);
+		int y = pos.getLocalY(base);
+		builder.put(DataType.BYTE, DataTransformation.ADD, y);
+
+		return builder.toGamePacket();
+	}
+
+}

src/org/apollo/net/release/r377/Release377.java

@@ -10,8 +10,10 @@ import org.apollo.game.event.impl.NpcSynchronizationEvent;
 import org.apollo.game.event.impl.OpenInterfaceEvent;
 import org.apollo.game.event.impl.OpenInterfaceSidebarEvent;
 import org.apollo.game.event.impl.PlayerSynchronizationEvent;
+import org.apollo.game.event.impl.PositionEvent;
 import org.apollo.game.event.impl.RegionChangeEvent;
 import org.apollo.game.event.impl.ServerMessageEvent;
+import org.apollo.game.event.impl.SetTileItemEvent;
 import org.apollo.game.event.impl.SetWidgetItemModelEvent;
 import org.apollo.game.event.impl.SetWidgetModelAnimationEvent;
 import org.apollo.game.event.impl.SetWidgetNpcModelEvent;
@@ -120,6 +122,7 @@ public final class Release377 extends Release {
 		register(67, new FirstNpcActionEventDecoder());
 		register(112, new SecondNpcActionEventDecoder());
 		register(13, new ThirdNpcActionEventDecoder());
+		register(71, new TakeTileItemEventDecoder());
 
 		// register encoders
 		register(IdAssignmentEvent.class, new IdAssignmentEventEncoder());
@@ -144,6 +147,8 @@ public final class Release377 extends Release {
 		register(SetWidgetModelAnimationEvent.class, new SetWidgetModelAnimationEventEncoder());
 		register(ConfigEvent.class, new ConfigEventEncoder());
 		register(DisplayTabInterfaceEvent.class, new DisplayTabInterfaceEventEncoder());
+		register(SetTileItemEvent.class, new SetTileItemEventEncoder());
+		register(PositionEvent.class, new PositionEventEncoder());
 	}
 
 }

src/org/apollo/net/release/r377/SetTileItemEventEncoder.java

@@ -0,0 +1,42 @@
+package org.apollo.net.release.r377;
+
+import org.apollo.game.event.impl.SetTileItemEvent;
+import org.apollo.net.codec.game.DataTransformation;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketBuilder;
+import org.apollo.net.release.EventEncoder;
+
+/**
+ * An {@link EventEncoder} for the {@link SetTileItemEvent}.
+ * 
+ * @author Major
+ */
+public class SetTileItemEventEncoder extends EventEncoder<SetTileItemEvent> {
+
+	@Override
+	public GamePacket encode(SetTileItemEvent event) {
+		GamePacketBuilder builder = null;
+		if (event.getAmount() == 0) { // remove the item.
+			builder = new GamePacketBuilder(208);
+
+			builder.put(DataType.SHORT, DataTransformation.ADD, event.getId());
+			builder.put(DataType.BYTE, DataTransformation.ADD, event.getPositionOffset());
+		} else if (!event.isUpdating()) { // sending a new item
+			builder = new GamePacketBuilder(107);
+
+			builder.put(DataType.SHORT, event.getId());
+			builder.put(DataType.BYTE, DataTransformation.NEGATE, event.getPositionOffset());
+			builder.put(DataType.SHORT, DataTransformation.ADD, event.getAmount());
+		} else { // updating an already displayed item
+			builder = new GamePacketBuilder(121);
+
+			builder.put(DataType.BYTE, event.getPositionOffset());
+			builder.put(DataType.SHORT, event.getId());
+			builder.put(DataType.SHORT, event.getPreviousAmount());
+			builder.put(DataType.SHORT, event.getAmount());
+		}
+		return builder.toGamePacket();
+	}
+
+}

src/org/apollo/net/release/r377/TakeTileItemEventDecoder.java

@@ -0,0 +1,28 @@
+package org.apollo.net.release.r377;
+
+import org.apollo.game.event.impl.TakeTileItemEvent;
+import org.apollo.game.model.Position;
+import org.apollo.net.codec.game.DataOrder;
+import org.apollo.net.codec.game.DataTransformation;
+import org.apollo.net.codec.game.DataType;
+import org.apollo.net.codec.game.GamePacket;
+import org.apollo.net.codec.game.GamePacketReader;
+import org.apollo.net.release.EventDecoder;
+
+/**
+ * An {@link EventDecoder} for the {@link TakeTileItemEvent}.
+ * 
+ * @author Major
+ */
+public class TakeTileItemEventDecoder extends EventDecoder<TakeTileItemEvent> {
+
+	@Override
+	public TakeTileItemEvent decode(GamePacket packet) {
+		GamePacketReader reader = new GamePacketReader(packet);
+		int id = (int) reader.getUnsigned(DataType.SHORT, DataOrder.LITTLE, DataTransformation.ADD);
+		int x = (int) reader.getUnsigned(DataType.SHORT, DataOrder.LITTLE, DataTransformation.ADD);
+		int y = (int) reader.getUnsigned(DataType.SHORT, DataTransformation.ADD);
+		return new TakeTileItemEvent(id, new Position(x, y));
+	}
+
+}