topictools.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * 该类主要用于提供工具编辑主题
 * 显示并提供所有可能用于编辑该主题的的工具，如“编辑内容”“删除主题”
 *“移入其他讨论区”“锁定主题”“推荐主题”等等，有些功能需要有管理权限身份的用户才
 * 能显示及使用。
 */

package biz.tbuy.bbs.bean;

import biz.tbuy.bbs.AuthTopic;
import biz.tbuy.bbs.BBSGroups;
import biz.tbuy.bbs.TopicBuilder;
import biz.tbuy.bbs.TopicFactory;
import biz.tbuy.common.Constants;
import biz.tbuy.bbs.TopicModel;
import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.faces.component.UICommand;

/**
 * @author huliqing
 * <p><b>qq：</b>31703299
 * <p><b>E-mail：</b><a href="mailto:[e-mail]">[e-mail]</a>
 * <p><b>Homepage：</b><a href="http://www.tbuy.biz/">http://www.tbuy.biz/</a>
 */
public class TopicTools extends BaseBean{
    private TopicModel _topic;   // 需要提供工具进行编辑操作的topic
    private AuthTopic _authenticator;    // 当前用户相对于该topic的所有权限
    private UICommand _uiMove;
    private UICommand _uiUpdateType;
    private UICommand _uiLock;
    private UICommand _uiBgsound;
    
    /** Creates a new instance of TopicTools */
    public TopicTools() {
        _topic = new TopicModel();
        _uiMove = new UICommand();
        _uiUpdateType = new UICommand();
        _uiLock = new UICommand();
        _uiBgsound = new UICommand();
    }
    
    public void setTopic(TopicModel topic) {
        _topic = topic;
    }

    public TopicModel getTopic() {
        return _topic;
    }
    
    public void setUiMove(UICommand uiMove) {
        _uiMove = uiMove;
    }
    
    public UICommand getUiMove() {
        _uiMove.setRendered(getAuthenticator().isTopicMove());
        return _uiMove;
    }
    
    public void setUiUpdateType(UICommand uiUpdateType) {
        _uiUpdateType = uiUpdateType;
    }
    
    public UICommand getUiUpdateType() {
        _uiUpdateType.setRendered(getAuthenticator().getPower() >= BBSGroups.POWER_MASTER);
        return _uiUpdateType;
    }
    
    public void setUiLock(UICommand uiLock) {
        _uiLock = uiLock;
    }
    
    public UICommand getUiLock() {
        _uiLock.setRendered(getAuthenticator().isTopicLock());
        return _uiLock;
    }
    
    public UICommand getUiBgsound() {
        _uiBgsound.setRendered(getAuthenticator().isTopicBgsound());
        return _uiBgsound;
    }
    
    /**
     * 获取该topic的相应权限
     */
    private AuthTopic getAuthenticator() {
        if (_authenticator == null) {
            TopicBuilder tBuilder = TopicFactory.newBuilder(_topic);
            _authenticator = tBuilder.getAuthenticator();
        } 
        return _authenticator;
    }
    
    // -------------------------------------------------- topic tools
    
    /**
     * 选择“编辑内容”后绑定Bean并跳转到编辑页面topicEdit.jsp
     * 需要重新载入topic,否则部分属性会丢失
     */
    public String toEdit() {
        this.reload();
        TopicEdit te = new TopicEdit();
        te.setTopic(_topic);
        ValueExpression ve = this.getValueExpression("bbs_topicEdit", 
                "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, te);
        return Constants.OUT_SUCCESS;  
    }
    
    /**
     * 选择“更改类型”后绑定Bean并跳转到编辑页面topicType.jsp
     * 需要重新载入topic,否则部分属性会丢失
     */
    public String toType() {
        this.reload();
        TopicType te = new TopicType();
        te.setTopic(_topic);
        ValueExpression ve = this.getValueExpression("bbs_topicType", 
                "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, te);
        return Constants.OUT_SUCCESS;  
    }
    
    /**
     * 选择“阅读权限”后绑定Bean并跳转到编辑页面topicAuth.jsp
     * 需要重新载入topic,否则部分属性会丢失
     */
    public String toAuth() {
        this.reload();
        TopicAuth ta = new TopicAuth();
        ta.setTopic(_topic);
        ValueExpression ve = getValueExpression("bbs_topicAuth", "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, ta);
        return Constants.OUT_SUCCESS;  
    }
    
    /**
     * 选择“背景音乐”后绑定bean并跳转到topicBgsound.jsp
     * 进行背景音乐编辑
     */
    public String toBgsound() {
        this.reload();
        TopicBgsound tb = new TopicBgsound();
        tb.setTopic(_topic);
        ValueExpression ve = getValueExpression("bbs_topicBgsound", "requestScope");
        ve.setValue(getELContext(), tb);
        return Constants.OUT_SUCCESS;
    }
    
    /**
     * 选择“移动主题”后绑定Bean并跳转到相应页面
     */
    public String toMove() {
        this.reload();
        TopicMove tm = new TopicMove();
        tm.setTopic(_topic);
        ValueExpression ve = getValueExpression("bbs_topicMove", "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, tm);
        return Constants.OUT_SUCCESS;
    }
    
    /**
     * 选择“锁贴”后绑定Bean并跳转到编辑页面topicLock.jsp
     * 需要重新载入topic,否则部分属性会丢失
     */
    public String toLock() {
        this.reload();
        TopicLock tl = new TopicLock();
        tl.setTopic(_topic);
        ValueExpression ve = this.getValueExpression("bbs_topicLock", 
                "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, tl);
        return Constants.OUT_SUCCESS;  
    }
    
    /**
     * 于页面中先择“删除主题”后将当前topic绑定于TopicRevoke的topic
     * 并转到topicRevoke.jsp进行删除
     */
    public String toRevoke() {
        this.reload();
        TopicRevoke tr = new TopicRevoke();
        tr.setTopic(_topic);
        ValueExpression ve = this.getValueExpression("bbs_topicRevoke", 
                "requestScope");
        ELContext elc = getELContext();
        ve.setValue(elc, tr);
        return Constants.OUT_SUCCESS;  
    }
    
    /**
     * 重新载入topic,以免属性丢失
     */
    public String reload() {
        _topic = TopicFactory.getTopic(_topic.getNum());
        return Constants.OUT_SUCCESS;
    }
}