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Ars framework module educate
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package ars.module.educate.service;

import java.util.Map;
import java.util.List;
import java.util.HashMap;
import java.util.ArrayList;

import ars.util.SimpleTree;
import ars.invoke.request.Requester;
import ars.invoke.request.ParameterInvalidException;
import ars.module.educate.model.Course;
import ars.module.educate.model.Chapter;
import ars.module.educate.service.ChapterService;
import ars.database.repository.Query;
import ars.database.repository.Repositories;
import ars.database.repository.Repository;
import ars.database.service.StandardGeneralService;

/**
 * 课程章节抽象实现
 * 
 * @author yongqiangwu
 * 
 * @param 
 *            数据模型
 */
public abstract class AbstractChapterService extends StandardGeneralService
		implements ChapterService {

	@Override
	public void initObject(Requester requester, T entity) {
		super.initObject(requester, entity);
		Course course = entity.getCourse();
		Chapter parent = entity.getParent();
		Query query = this.getRepository().query().ne("id", entity.getId()).eq("course", course).eq("name",
				entity.getName());
		if (parent == null) {
			query.empty("parent");
		} else {
			query.eq("parent", parent);
		}
		if (query.count() > 0) {
			throw new ParameterInvalidException("name", "exist");
		}
		if (parent == null) {
			if (course == null) {
				throw new ParameterInvalidException("course", "required");
			}
		} else if (course == null) {
			entity.setCourse(parent.getCourse());
		} else if (!course.equals(parent.getCourse())) {
			throw new ParameterInvalidException("course", "invalid");
		}
	}

	@SuppressWarnings("unchecked")
	@Override
	public void updateObject(Requester requester, T object) {
		T parent = (T) object.getParent();
		Repository repository = this.getRepository();
		T old = repository.get(object.getId());
		super.updateObject(requester, object);
		if (old.getActive() != object.getActive()) {
			if (object.getActive() == Boolean.TRUE) {
				while (parent != null) {
					if (parent.getActive() == Boolean.FALSE) {
						parent.setActive(true);
						repository.update(parent);
					}
					parent = (T) parent.getParent();
				}
			} else if (object.getActive() == Boolean.FALSE) {
				List chapters = repository.query().ne("id", object.getId()).eq("active", true)
						.start("key", object.getKey()).list();
				for (int i = 0; i < chapters.size(); i++) {
					T chapter = chapters.get(i);
					chapter.setActive(false);
					repository.update(chapter);
				}
			}
		}
	}

	@Override
	public List ctrees(Requester requester) {
		List trees = this.trees(requester);
		List branchs = Repositories.getSimpleTrees(trees);
		List roots = new ArrayList(trees.size());
		Map temp = new HashMap(trees.size());
		for (int i = 0; i < trees.size(); i++) {
			Course course = trees.get(i).getCourse();
			SimpleTree root = temp.get(course);
			if (root == null) {
				root = Repositories.getSimpleTree(course);
				temp.put(course, root);
				roots.add(root);
			}
			SimpleTree branch = branchs.get(i);
			branch.setParent(root);
			root.getChildren().add(branch);
		}
		return roots;
	}

}