package foundation.state.approve;

import java.util.Iterator;
import java.util.List;

import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;
import foundation.util.MapList;

public class WorkingStepList implements Iterable<WorkingStep>, IJSONProvider {

	private MapList<String, WorkingStep> items;
	
	
	public WorkingStepList() {
		items = new MapList<String, WorkingStep>();
	}

	public void loadOne(WorkingStep step) {
		items.add(step.getId(), step);
	}

	public WorkingStep get(String id) {
		return items.get(id);
	}
	
	public WorkingStep get(int idx) {
		return items.get(idx);
	}

	public int size() {
		return items.size();
	}
	
	public WorkingStep getLast() {
		if (items.isEmpty()) {
			return null;
		}
		
		int idx = items.size() - 1;
		return items.get(idx);
	}

	public List<WorkingStep> getList() {
		return items.getItemList();
	}

	@Override
	public Iterator<WorkingStep> iterator() {
		return items.iterator();
	}

	@Override
	public void writeJSON(IJSONWriter writer) {
		writer.beginArray();
		
		for (WorkingStep step: items) {
			step.writeJSON(writer);
		}
		
		writer.endArray();
	}

	public void writeJSONBody(IJSONWriter writer) {
		for (WorkingStep step: items) {
			step.writeJSON(writer);
		}
	}

}