SwitchCommand.java

package net.aufdemrand.denizen.scripts.commands.world;

import net.aufdemrand.denizen.BukkitScriptEntryData;
import net.aufdemrand.denizen.utilities.DenizenAPI;
import net.aufdemrand.denizen.utilities.depends.Depends;
import net.aufdemrand.denizencore.exceptions.CommandExecutionException;
import net.aufdemrand.denizencore.exceptions.InvalidArgumentsException;
import net.aufdemrand.denizen.objects.Duration;
import net.aufdemrand.denizen.objects.Element;
import net.aufdemrand.denizen.objects.aH;
import net.aufdemrand.denizen.objects.dLocation;
import net.aufdemrand.denizen.scripts.ScriptEntry;
import net.aufdemrand.denizen.scripts.commands.AbstractCommand;
import net.aufdemrand.denizen.utilities.debugging.dB;
import net.citizensnpcs.api.CitizensAPI;
import net.citizensnpcs.api.npc.NPC;
import net.minecraft.server.v1_8_R1.Block;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.craftbukkit.v1_8_R1.CraftWorld;
import org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Switches a button or lever.
 *
 * @author Jeremy Schroeder, Mason Adkins, David Cernat
 */

public class SwitchCommand extends AbstractCommand {

    /* SWITCH [LOCATION:x,y,z,world] (STATE:ON|OFF|TOGGLE) (DURATION:#) */

    /*
     * Arguments: [] - Required, () - Optional
     * [LOCATION:x,y,z,world] specifies location of a switch, lever, or pressure plate.
     * (STATE:ON|OFF|TOGGLE) can be used on locations with switches. Default: TOGGLE
     * (DURATION:#) Reverts to the previous head position after # amount of seconds.
     *
     * Example Usage:
     * SWITCH LOCATION:<BOOKMARK:Lever_1> STATE:ON
     * SWITCH LOCATION:99,64,125,world 'DURATION:15'
     * SWITCH LOCATION:<ANCHOR:button_location>
     *
     */

    private enum SwitchState { ON, OFF, TOGGLE }

    private Map<Location, Integer> taskMap = new ConcurrentHashMap<Location, Integer>(8, 0.9f, 1);


    @Override
    public void parseArgs(ScriptEntry scriptEntry) throws InvalidArgumentsException  {
        for (aH.Argument arg : aH.interpret(scriptEntry.getArguments())) {

            if (!scriptEntry.hasObject("location") &&
                    arg.matchesArgumentType(dLocation.class))
                scriptEntry.addObject("location", arg.asType(dLocation.class));

            else if (!scriptEntry.hasObject("duration") &&
                    arg.matchesArgumentType(Duration.class))
                scriptEntry.addObject("duration", arg.asType(Duration.class));

            else if (!scriptEntry.hasObject("state") &&
                    arg.matchesEnum(SwitchState.values()))
                scriptEntry.addObject("switchstate", new Element(arg.getValue().toUpperCase()));

            else arg.reportUnhandled();
        }

        if (!scriptEntry.hasObject("location"))
            throw new InvalidArgumentsException("Must specify a location!");

        scriptEntry.defaultObject("duration", new Duration(0));
        scriptEntry.defaultObject("switchstate", new Element("TOGGLE"));
    }

    @Override
    public void execute(ScriptEntry scriptEntry) throws CommandExecutionException {
        final dLocation interactLocation = (dLocation)scriptEntry.getObject("location");
        int duration = ((Duration)scriptEntry.getObject("duration")).getSecondsAsInt();
        final SwitchState switchState = SwitchState.valueOf(scriptEntry.getElement("switchstate").asString());

        final Player player = ((BukkitScriptEntryData)scriptEntry.entryData).hasPlayer() ? ((BukkitScriptEntryData)scriptEntry.entryData).getPlayer().getPlayerEntity(): null;
        // Switch the Block
        final ScriptEntry se = scriptEntry;
        switchBlock(se, interactLocation, switchState, player);

        // If duration set, schedule a delayed task.
        if (duration > 0) {
            // If this block already had a delayed task, cancel it.
            if (taskMap.containsKey(interactLocation))
                try { DenizenAPI.getCurrentInstance().getServer().getScheduler().cancelTask(taskMap.get(interactLocation)); } catch (Exception e) { }
            dB.log("Setting delayed task 'SWITCH' for " + interactLocation.identify());
            // Store new delayed task ID, for checking against, then schedule new delayed task.
            taskMap.put(interactLocation, DenizenAPI.getCurrentInstance().getServer().getScheduler().scheduleSyncDelayedTask(DenizenAPI.getCurrentInstance(),
                    new Runnable() {
                        public void run() {
                    // Check to see if the state of the block is what is expected. If switched during
                    // the duration, the switchback is cancelled.
                    if (switchState == SwitchState.OFF && !((interactLocation.getBlock().getData() & 0x8) > 0))
                        switchBlock(se, interactLocation, SwitchState.ON, player);
                    else if (switchState == SwitchState.ON && ((interactLocation.getBlock().getData() & 0x8) > 0))
                        switchBlock(se, interactLocation, SwitchState.OFF, player);
                    else if (switchState == SwitchState.TOGGLE) switchBlock(se, interactLocation, SwitchState.TOGGLE, player);
                }
            }, duration * 20));
        }

    }

    // Break off this portion of the code from execute() so it can be used in both execute and the delayed runnable
    public void switchBlock(ScriptEntry scriptEntry, Location interactLocation, SwitchState switchState, Player player) {
        World world = interactLocation.getWorld();
        boolean currentState = (interactLocation.getBlock().getData() & 0x8) > 0;
        String state = switchState.toString();

        // Try for a linked player
        CraftPlayer craftPlayer = (CraftPlayer) player;
        if (craftPlayer == null && Bukkit.getOnlinePlayers().size() > 0) {
            // If there's none, link any player
            if (Bukkit.getOnlinePlayers().size() > 0) {
                craftPlayer = (CraftPlayer) Bukkit.getOnlinePlayers().toArray()[0];
            }
            else if (Depends.citizens != null) {
                // If there are no players, link any Human NPC
                for (NPC npc: CitizensAPI.getNPCRegistry()) {
                    if (npc.isSpawned() && npc.getEntity() instanceof Player) {
                        craftPlayer = (CraftPlayer) npc.getEntity();
                        break;
                    }
                }
                // TODO: backup if no human NPC available? (Fake EntityPlayer instance?)
            }
        }

        if ((state.equals("ON") && !currentState) ||
            (state.equals("OFF") && currentState) ||
             state.equals("TOGGLE")) {

            try {
                if (interactLocation.getBlock().getType() == Material.IRON_DOOR_BLOCK) {
                    Location block;
                    if (interactLocation.clone().add(0, -1, 0).getBlock().getType() == Material.IRON_DOOR_BLOCK)
                        block = interactLocation.clone().add(0, -1, 0);
                    else
                        block = interactLocation;
                    block.getBlock().setData((byte) (block.getBlock().getData() ^ 4));
                }
                else {

                    // TODO: Rewrite the below code to not use freakin' NMS!
                    /*
                    Block.getById(interactLocation.getBlock().getType().getId())
                        .interact(((CraftWorld)world).getHandle(),
                                interactLocation.getBlockX(),
                                interactLocation.getBlockY(),
                                interactLocation.getBlockZ(),
                                craftPlayer != null ? craftPlayer.getHandle(): null, 0, 0f, 0f, 0f);
                                */
                    // TODO: 1.8 UPDATE
                }

                dB.echoDebug(scriptEntry, "Switched " + interactLocation.getBlock().getType().toString() + "! Current state now: " +
                        ((interactLocation.getBlock().getData() & 0x8) > 0 ? "ON" : "OFF"));

            } catch (NullPointerException e) {
                dB.echoError("Cannot switch " + interactLocation.getBlock().getType().toString() + "!");
            }
        }
    }
}