用pegjs重写过滤逻辑

lib/filter.js

@@ -1,87 +1,12 @@
 const replaceStrFormIndexArr = require("../utils").replaceStrFormIndexArr;
+const commentFilter = require('../core/comment');
 
 /**
  * 过滤--注释
  * @param {String} sql 
  */
 function filterComments(sql) {
-    let tmpArr = [];
-    const comments = [];
-
-    for (let i = 0; i < sql.length; i++) {
-        let char = sql[i];
-
-        //读取字符
-        if (char == "'" || char == "\"" || char == "-" || char == "\n" || char == "/" || char == "*") {
-            //推入数组
-            tmpArr.push({
-                index: i,
-                char: char
-            });
-        }
-        //校验数组是否有匹配语法
-        if (tmpArr.length < 2) {
-            if (tmpArr[0] && (tmpArr[0].char == "\n" || tmpArr[0].char == "*")) {
-                tmpArr = [];
-            }
-            continue;
-        }
-
-        let firstChar = tmpArr[0];
-        let lastChar = tmpArr[tmpArr.length - 1];
-
-        if (firstChar.char == "'" || firstChar.char == "\"") {
-            //引号匹配，则清空
-            if (lastChar.char == firstChar.char) {
-                tmpArr = [];
-                continue;
-            }
-        } else if (firstChar.char == "/") {
-            if (tmpArr[1].char != "*") {
-                tmpArr = [];
-            } else if (lastChar.char == "/") {
-                if (tmpArr.length > 3 && tmpArr[tmpArr.length - 2].char == "*") {
-                    comments.push({
-                        begin: firstChar.index,
-                        end: lastChar.index
-                    })
-                    tmpArr = [];
-                }   
-            }
-            continue;
-        } else if (firstChar.char == "-") {
-            //假如第一个是横线，则开始校验注释规则
-
-            //判断是否为两个注释符号，不是，则清空
-            if (tmpArr[1].char != "-") {
-                tmpArr = [];
-                continue;
-            }
-            //为注释作用域，遇到换行符，则结束注释
-            else if (lastChar.char == "\n") {
-                comments.push({
-                    begin: firstChar.index,
-                    end: lastChar.index
-                })
-                tmpArr = [];
-                continue;
-            }
-            //解析结束
-            else if (i == sql.length - 1) {
-                comments.push({
-                    begin: firstChar.index,
-                    end: i
-                })
-                continue;
-            }
-        } else {
-            tmpArr = [];
-        }
-    }
-
-    sql = replaceStrFormIndexArr(sql, '', comments)
-
-    return sql;
+    return commentFilter.parse(sql)
 }
 
 /**
@@ -89,7 +14,7 @@ function filterComments(sql) {
  * @param {String} sql 
  */
 function cleanSql(sql) {
-    return filterComments(sql).trim();
+    return filterComments(sql);
 }
 
 /**