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package com.earth2me.essentials.update.states;
import com.earth2me.essentials.update.AbstractWorkListener;
import org.bukkit.entity.Player;
public abstract class AbstractState
{
private transient boolean abortion = false;
private final transient StateMap stateMap;
public AbstractState(final StateMap stateMap)
{
this.stateMap = stateMap;
}
public <T extends AbstractState> T getState(final Class<? extends T> stateClass)
{
if (!stateMap.containsKey(stateClass))
{
try
{
final AbstractState state = stateClass.getConstructor(StateMap.class).newInstance(stateMap);
stateMap.put(stateClass, state);
}
catch (Exception ex)
{
/*
* This should never happen.
* All states that are added to the map automatically,
* have to have a Constructor that accepts the StateMap.
*/
throw new RuntimeException(ex);
}
}
return (T)stateMap.get(stateClass);
}
public abstract AbstractState getNextState();
/**
* Check if we already know the answer, so the user does not have to answer the question.
*
* @return true, if the answer could be guessed.
*/
public boolean guessAnswer()
{
return false;
}
/**
* Ask the user the question.
* @param sender
*/
public abstract void askQuestion(Player sender);
/**
* React on the answer and set internal variables
* @param answer
* @return true, if the answer could be recognized as a valid answer
*/
public abstract boolean reactOnAnswer(String answer);
public final AbstractState reactOnAnswer(final Player sender, final String answer)
{
final String trimmedAnswer = answer.trim();
if (trimmedAnswer.equalsIgnoreCase("quit")
|| trimmedAnswer.equalsIgnoreCase("bye")
|| trimmedAnswer.equalsIgnoreCase("abort")
|| trimmedAnswer.equalsIgnoreCase("cancel")
|| trimmedAnswer.equalsIgnoreCase("exit"))
{
abort();
return null;
}
try
{
final boolean found = reactOnAnswer(trimmedAnswer);
if (found)
{
return getNextState();
}
else
{
sender.sendMessage("Answer not recognized.");
return this;
}
}
catch (RuntimeException ex)
{
sender.sendMessage(ex.toString());
return this;
}
}
/**
* Do something based on the answer, that the user gave.
*/
public void doWork(final AbstractWorkListener listener)
{
listener.onWorkDone();
}
public boolean isAbortion()
{
return abortion;
}
protected void abort()
{
abortion = true;
}
}
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