sample 1

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.ai.ext.tasks;

import com.l2jserver.gameserver.ai.ext.AI_TaskQueue;
import com.l2jserver.gameserver.ai.ext.struct.task.AITaskSimpleVar;
import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.util.Rnd;

/**
 * ==============================================<br>
 * RandomSayTask - This task will make NPC char "talk" on chat, some message
 * we wish to. By default, task has starting random chance between 1-7%. On each task weight
 * update cycle, chance increases by another random 1-7%. Task disallows execution, if
 * other of same type, has been executed, within last 10 seconds.<br>
 * ==============================================<br>
 * @author Deedlit(piotr@angakaran.cc, http://MMOPlay.eu)
 */
public class RandomSayTask extends AbstractAITask
{
    private String _msg;

    public RandomSayTask(L2Character actor, String msg)
    {
        super(actor.getTaskQueue(), 0, true, false, calculateWeightForPercentage(Rnd.qget(1, 7)), actor);
        _msg = msg;
    }

    @Override
    protected void initTaskTypeName()
    {
        _name = "RandomSayTask";
    }

    @Override
    public boolean valid()
    {
        return hasAI() && !getActor().isDead() && !getAI().getIntention().isAttackingMode() && !getActor().isInPanic();
    }

    @Override
    public boolean ready()
    {
        return _msg != null && !_msg.isEmpty();
    }

    @Override
    public boolean run()
    {
        getActor().sendLongMsgAbove(_msg);
        _msg = null;
        return true;
    }

    @Override
    public boolean block_think_after_run()
    {
        return false;
    }

    @Override
    public int update_weight()
    {
        return getWeightProperLimits(weight(false) + calculateWeightForPercentage(Rnd.qget(1, 3)));
    }

    @Override
    public boolean valid_update_weight_delay()
    {
        return getLastWeightUpdateTimestamp() <= 0 || System.currentTimeMillis() - getLastWeightUpdateTimestamp() > 5000;
    }

    @Override
    public boolean removeable()
    {
        return (getTaskExecCounter(true) > 0 && execSuccess()) || !valid();
    }

    @Override
    public boolean valid_run_delay()
    {
        return getTaskLastExecTimestamp(false) <= 0 || System.currentTimeMillis() - getTaskLastExecTimestamp(false) >= 20000;
    }

    @Override
    public int max_task_instances()
    {
        return -1;
    }

    @Override
    public void on_variable_listener(AITaskSimpleVar.LISTENER_EVENTS event, AITaskSimpleVar variable)
    {
        // ignored
    }

    @Override
    public void on_added_to_queue(AI_TaskQueue queue)
    {
        // ignored
    }

    @Override
    public void on_remove_from_queue(AI_TaskQueue queue)
    {
        // ignored
    }
}