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AJAXJS aims to full-stack, not only the server-side framework, but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated, emphasizing the lightweight, and fast, very suitable for the Internet fast application.

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/**
 * Copyright 2015 Sp42 [email protected]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.ajaxjs.website.controller;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.validation.constraints.NotNull;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.ajaxjs.framework.BaseController;
import com.ajaxjs.util.io.FileHelper;
import com.ajaxjs.util.logger.LogHelper;
import com.ajaxjs.web.mvc.MvcRequest;

/**
 * 默认的页面编辑器
 * 
 * @author sp42 [email protected]
 *
 */
@Controller
@RequestMapping("/admin/website/page_editor")
public class PageEditorController extends BaseController {
	private static final LogHelper LOGGER = LogHelper.getLog(PageEditorController.class);

	/**
	 * 浏览页面，加载一个含有 iframe 元素的页面。 对该页面你可以传入 url 参数指定 root 地址，否则就是 ../../，即 ${empty
	 * param.url ? '../../' : param.url}
	 * 
	 * @return iframe 元素的页面模版地址
	 */
	@GetMapping
	public String show() {
		LOGGER.info("浏览页面");

		return "website/page-load-iframe";
	}

	/**
	 * 编辑页面，加载一个含有 HTMLEditor 编辑的页面
	 * 
	 * @param r 请求对象
	 * @return 含有 HTMLEditor 编辑页面地址
	 * @throws IOException
	 */
	@GetMapping("loadPage")
	public String loadPage(@NotNull String url, HttpServletRequest _req) throws IOException {
		MvcRequest req = (MvcRequest) _req;
		String path = getUrl(req.mappath(url));
		LOGGER.info("编辑页面" + path);
		req.setAttribute("contentBody", readContent(path));

		return "website/page-editor";
	}

	/**
	 * 保存编辑后的内容
	 * 
	 * @param r 请求对象，必填 url 和 contentBody 两个参数
	 * @return JSON 结果
	 * @throws IOException
	 */
	@ResponseBody
	@PostMapping(produces = JSON)
	public String save(HttpServletRequest _req, @NotNull String url, @NotNull String contentBody) throws IOException {
		MvcRequest req = (MvcRequest) _req;
		String path = getUrl(req.mappath(url)), // 真实的磁盘文件路径
				content = FileHelper.openAsText(path), toDelContent = readContent(path);// 读取旧内容

		LOGGER.info("保存编辑后的内容" + path);

		if (toDelContent != null) {
			content = content.replace(toDelContent, contentBody);
			FileHelper.saveText(path, content);
		}

		return jsonOk("修改页面成功！");
	}

	/**
	 * 可编辑标识开始
	 */
	private final static String START_TOKEN = "";

	/**
	 * 可编辑标识结束
	 */
	private final static String END_TOKEN = "";

	/**
	 * 根据页面中可编辑区域之标识，取出来。
	 * 
	 * @param path 完整的 jsp 文件路径
	 * @return 可编辑内容
	 * @throws IOException
	 */
	private static String readContent(String path) throws IOException {
		String content = FileHelper.openAsText(path);
		int start = content.indexOf(START_TOKEN), end = content.indexOf(END_TOKEN);

		try {
			return content.substring(start + START_TOKEN.length(), end);
		} catch (StringIndexOutOfBoundsException e) {
			String msg = "页面文件" + path + "中没有标记可编辑区域之标识。请参考：" + START_TOKEN + "/" + END_TOKEN;
			throw new IOException(msg);
		}
	}

	/**
	 * 请求附带文件参数，将其转换真实的磁盘文件路径
	 * 
	 * @param url URL 提交过来的磁盘文件路径，可能未包含文件名或加了很多 url 参数
	 * @return 完整的磁盘文件路径
	 */
	private static String getUrl(String url) {
		if (url.indexOf(".jsp") == -1 && url.indexOf(".htm") == -1)
			url += "/index.jsp"; // 加上 扩展名

		if (url.indexOf("?") != -1) // 去掉 url 参数
			url = url.replaceAll("\\?.*$", "");

		return url;
	}

	/**
	 * 获取指定目录内的图片 目录有 folder 参数指定 TODO
	 * 
	 * @param folder 包含图片的目录
	 * @return 图片文件名列表
	 */
	public static String getImgList(String folder) {
		File dir = new File(folder);
		File[] files = dir.listFiles();

		List json = new ArrayList();

		if (files == null)
			return null;

		for (int i = 0; i < files.length; i++) {
			if (files[i].isDirectory()) {
				continue;
			} else {
				final String strFileName = files[i].getName();
				if (strFileName.contains(".jpg") || strFileName.contains(".gif") || strFileName.contains(".png")) {

					// String el = JsonHelper.stringify_object(new Object() {
					// @SuppressWarnings("unused")
					// public Boolean isOk = true;
					// @SuppressWarnings("unused")
					// public String fileName = strFileName;
					// @SuppressWarnings("unused")
					// public String id = strFileName;
					// });

					// json.add(el);
				}
			}
		}

		return String.format(jsonTpl, String.join(",", json), json.size());
	}

	private static final String jsonTpl = "{\"result\" : [%s], \"total\" : %s}";
}