public abstract class TheContainerBase
	extends Container
{
	/**
	 * Maps slotNumber -> Slot
	 */
	private final HashMap<Integer, Slot> slotMap = new HashMap<Integer, Slot>();

	/**
	 * Set if the player is an MP player.
	 */
	private final EntityPlayerMP playerMP;

	/**
	 * The player interacting with this container.
	 */
	protected final EntityPlayer player;

	public TheContainerBase( final EntityPlayer player )
	{
		// Set the player
		this.player = player;
		if( player instanceof EntityPlayerMP )
		{
			this.playerMP = (EntityPlayerMP)player;
		}
		else
		{
			this.playerMP = null;
		}
	}

	/**
	 * Adds a slot to the container and the slot map.
	 */
	@Override
	protected Slot addSlotToContainer( @Nonnull final Slot slot )
	{
		// Call super
		super.addSlotToContainer( slot );

		// Map the slot
		if( this.slotMap.put( slot.slotNumber, slot ) != null )
		{
			ThELog.warning( "Duplicate Slot Number Detected: %d", slot.slotNumber );
		}

		return slot;
	}

	/**
	 * Detects server side changes to send to the player.<br/>
	 * When modifying slots, return true to set {@code playerMP.isChangingQuantityOnly} to {@code false},
	 * or set it directly with the player argument.
	 *
	 * @param playerMP
	 *
	 * @return
	 */
	protected boolean detectAndSendChangesMP( @Nonnull final EntityPlayerMP playerMP )
	{
		return false;
	}

	@Override
	public void detectAndSendChanges()
	{
		// Call super
		super.detectAndSendChanges();

		// MP player?
		if( this.playerMP != null )
		{
			if( this.detectAndSendChangesMP( this.playerMP ) )
			{
				this.playerMP.isChangingQuantityOnly = false;

				// Call super
				super.detectAndSendChanges();
			}
		}
	}

	/**
	 * Use getSlotOrNull.
	 */
	@Override
	@Deprecated
	public Slot getSlot( final int slotNumber )
	{
		return super.getSlot( slotNumber );
	}

	/**
	 * Returns the slot with the specified slot number or null.
	 *
	 * @param slotNumber
	 * @return
	 */
	@Nullable
	public Slot getSlotOrNull( final int slotNumber )
	{
		return this.slotMap.getOrDefault( slotNumber, null );
	}

	/**
	 * Clears the slot map.
	 */
	@Override
	public void onContainerClosed( @Nonnull final EntityPlayer player )
	{
		// Call super
		super.onContainerClosed( player );

		// Clear the map
		this.slotMap.clear();
	}

}