Merge pull request #14 from lingting-gzm/master

✨ 钉钉消息以及markdown基础实现

ballcat-common/ballcat-common-core/src/main/java/com/hccake/ballcat/common/core/markdown/MarkdownBuilder.java

@@ -0,0 +1,242 @@
+package com.hccake.ballcat.common.core.markdown;
+
+import cn.hutool.core.convert.Convert;
+import cn.hutool.core.util.StrUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+/**
+ * 生成 markdown 文本
+ *
+ * @author lingting  2020/6/10 22:43
+ */
+public class MarkdownBuilder {
+	public static final String TITLE_PREFIX = "#";
+	public static final String QUOTE_PREFIX = "> ";
+	public static final String BOLD_PREFIX = "**";
+	public static final String ITALIC_PREFIX = "*";
+	public static final String UNORDERED_LIST_PREFIX = "- ";
+	public static final String ORDER_LIST_PREFIX = ". ";
+
+	/**
+	 * 存放内容
+	 */
+	private final List<String> content = new ArrayList<>();
+	/**
+	 * 当前操作行文本
+	 */
+	private StringBuilder lineTextBuilder;
+
+	/**
+	 * 添加自定义内容
+	 *
+	 * @param content 自定义内容
+	 * @author lingting 2020-06-10 23:14:54
+	 */
+	public MarkdownBuilder append(String content) {
+		lineTextBuilder.append(content);
+		return this;
+	}
+
+	/**
+	 * 有序列表 自动生成 索引
+	 *
+	 * @param content 文本
+	 * @author lingting 2020-06-10 23:13:41
+	 */
+	public MarkdownBuilder orderList(String content) {
+		// 获取最后一个字符串
+		String tmp = "";
+		if (this.content.size() != 0) {
+			tmp = this.content.get(this.content.size() - 1);
+		}
+		// 索引
+		int index = 1;
+
+		// 校验 是否 为有序列表行的正则
+		String isOrderListPattern = "^\\d\\. .*";
+		if (Pattern.matches(isOrderListPattern, tmp)) {
+			// 如果是数字开头
+			index = Convert.toInt(tmp.substring(0, tmp.indexOf(ORDER_LIST_PREFIX) - 1));
+		}
+		return orderList(index, content);
+	}
+
+	/**
+	 * 有序列表
+	 *
+	 * @param index   索引
+	 * @param content 文本
+	 * @author lingting 2020-06-10 23:13:41
+	 */
+	public MarkdownBuilder orderList(int index, String content) {
+		lineBreak();
+		lineTextBuilder.append(index).append(ORDER_LIST_PREFIX).append(content);
+		return this;
+	}
+
+	/**
+	 * 无序列表
+	 * - item1
+	 * - item2
+	 *
+	 * @author lingting  2020-06-10 23:09:29
+	 */
+	public MarkdownBuilder unorderedList(String content) {
+		// 换行
+		lineBreak();
+		lineTextBuilder.append(UNORDERED_LIST_PREFIX).append(content);
+		return this;
+	}
+
+	/**
+	 * 图片
+	 *
+	 * @param url 图片链接
+	 * @author lingting 2020-06-10 23:03:04
+	 */
+	public MarkdownBuilder pic(String url) {
+		return pic(StrUtil.EMPTY, url);
+	}
+
+	/**
+	 * 图片
+	 *
+	 * @param title 图片标题
+	 * @param url   图片路径
+	 * @author lingting 2020-06-10 23:03:11
+	 */
+	public MarkdownBuilder pic(String title, String url) {
+		lineTextBuilder.append("![").append(title).append("](").append(url).append(")");
+		return this;
+	}
+
+	/**
+	 * 链接
+	 *
+	 * @param title 标题
+	 * @param url   http 路径
+	 * @author lingting 2020-06-10 23:01:15
+	 */
+	public MarkdownBuilder link(String title, String url) {
+		lineTextBuilder.append("[").append(title).append("](").append(url).append(")");
+		return this;
+	}
+
+	/**
+	 * 斜体
+	 *
+	 * @author lingting  2020-06-10 22:59:26
+	 */
+	public MarkdownBuilder italic(String content) {
+		lineTextBuilder.append(ITALIC_PREFIX).append(content).append(ITALIC_PREFIX);
+		return this;
+	}
+
+	/**
+	 * 加粗
+	 *
+	 * @author lingting  2020-06-10 22:58:39
+	 */
+	public MarkdownBuilder bold(String content) {
+		lineTextBuilder.append(BOLD_PREFIX).append(content).append(BOLD_PREFIX);
+		return this;
+	}
+
+	/**
+	 * 引用
+	 * > 文本
+	 *
+	 * @param content 文本
+	 * @author lingting  2020-06-10 22:58:04
+	 */
+	public MarkdownBuilder quote(String content) {
+		forceLineBreak();
+		lineTextBuilder.append(QUOTE_PREFIX).append(content);
+		// 下面得换行两次
+		forceLineBreak();
+		forceLineBreak();
+		return this;
+	}
+
+	/**
+	 * 强制换行
+	 *
+	 * @author lingting  2020-06-10 22:56:25
+	 */
+	public MarkdownBuilder forceLineBreak() {
+		content.add(lineTextBuilder.toString());
+		lineTextBuilder = new StringBuilder();
+		return this;
+	}
+
+	/**
+	 * 换行
+	 * 当已编辑文本长度不为0时换行
+	 *
+	 * @author lingting  2020-06-10 22:56:25
+	 */
+	public MarkdownBuilder lineBreak() {
+		if (lineTextBuilder.length() != 0) {
+			return forceLineBreak();
+		}
+		return this;
+	}
+
+	/**
+	 * 生成 i 级标题
+	 *
+	 * @author lingting  2020-06-10 22:55:39
+	 */
+	private MarkdownBuilder title(int i, String content) {
+		lineTextBuilder = new StringBuilder();
+		for (int j = 0; j < i; j++) {
+			lineTextBuilder.append(TITLE_PREFIX);
+		}
+		this.content.add(lineTextBuilder.append(" ").append(content).toString());
+		lineTextBuilder = new StringBuilder();
+		return this;
+	}
+
+	public MarkdownBuilder title1(String text) {
+		return title(1, text);
+	}
+
+	public MarkdownBuilder title2(String text) {
+		return title(2, text);
+	}
+
+	public MarkdownBuilder title3(String text) {
+		return title(3, text);
+	}
+
+	public MarkdownBuilder title4(String text) {
+		return title(4, text);
+	}
+
+	public MarkdownBuilder title5(String text) {
+		return title(5, text);
+	}
+
+	@Override
+	public String toString() {
+		return build();
+	}
+
+	/**
+	 * 构筑 Markdown 文本
+	 *
+	 * @author lingting  2020-06-11 22:55:40
+	 */
+	public String build() {
+		if (lineTextBuilder.length() != 0) {
+			// 最后一个操作的 如果不为空，也需要添加进入list
+			content.add(lineTextBuilder.toString());
+		}
+		StringBuilder res = new StringBuilder();
+		content.forEach(content -> res.append(content).append("\\n"));
+		return res.toString();
+	}
+}