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package com.alogic.vfs.service;

import java.util.HashMap;
import java.util.Map;

import com.alogic.vfs.context.FileSystemSource;
import com.alogic.vfs.core.VirtualFileSystem;
import com.logicbus.backend.AbstractServant;
import com.logicbus.backend.Context;
import com.logicbus.backend.ServantException;
import com.logicbus.backend.message.JsonMessage;
import com.logicbus.backend.message.YamlMessage;
import com.logicbus.models.servant.ServiceDescription;


/**
 * 列出指定目录的文件列表
 * 
 * @author duanyy
 *
 * @version 1.6.12.27 [20190403 duanyy] 

 * - 增加对yaml的支持 

 */
public class FileList extends AbstractServant{

	@Override
	protected void onDestroy() {
		// nothing to do
	}

	@Override
	protected void onCreate(ServiceDescription sd) {
		// nothing to do
	}
	
	protected int onXml(Context ctx){
		throw new ServantException("core.e1000",
				"Protocol XML is not suppurted.");		
	}

	protected int onJson(Context ctx){
		JsonMessage msg = (JsonMessage) ctx.asMessage(JsonMessage.class);
		
		String path = getArgument("path","/",ctx);
		String fsId = getArgument("domain","default",ctx);
		String pattern = getArgument("pattern","[\\S]*",ctx);
		int offset = getArgument("offset",0,ctx);
		int limit = getArgument("limit",30,ctx);		
		
		VirtualFileSystem fs = FileSystemSource.get().get(fsId);
		
		if (fs == null){
			throw new ServantException("clnt.e2007","Can not find a vfs named " +  fsId);
		}
		
		Map vfs = new HashMap();
		
		fs.listFiles(path, pattern, vfs, offset, limit);
		
		msg.getRoot().put("vfs", vfs);
		return 0;
	}
	protected int onYaml(Context ctx){
		YamlMessage msg = (YamlMessage) ctx.asMessage(YamlMessage.class);

		String path = getArgument("path","/",ctx);
		String fsId = getArgument("domain","default",ctx);
		String pattern = getArgument("pattern","[\\S]*",ctx);
		int offset = getArgument("offset",0,ctx);
		int limit = getArgument("limit",30,ctx);

		VirtualFileSystem fs = FileSystemSource.get().get(fsId);

		if (fs == null){
			throw new ServantException("clnt.e2007","Can not find a vfs named " +  fsId);
		}

		Map vfs = new HashMap();

		fs.listFiles(path, pattern, vfs, offset, limit);

		msg.getRoot().put("vfs", vfs);
		return 0;
	}
}