fix: parse alert message for mark query result (#49)

* fix: parse alert message for mark query result

* Update mark.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix: lint

---------

Co-authored-by: Baoshuo <i@baoshuo.ren>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

mark.go

@@ -18,6 +18,7 @@ package jwch
 
 import (
 	"fmt"
+	"regexp"
 	"strings"
 
 	"golang.org/x/net/html"
@@ -36,6 +37,15 @@ func (s *Student) GetMarks() (resp []*Mark, err error) {
 		return nil, err
 	}
 
+	// window.alert( '你尚有学费未缴清，暂时不能查询成绩，如有疑问请与计财处联系！');
+	htmlStr := htmlquery.OutputHTML(res, false)
+	re := regexp.MustCompile(`window\.alert\s*\(\s*'([^']*)'\s*\)`)
+	matches := re.FindStringSubmatch(htmlStr)
+	if len(matches) == 2 {
+		message := matches[1]
+		return nil, errno.HTMLParseError.WithMessage(message)
+	}
+
 	table := htmlquery.FindOne(res, `//*[@id="ContentPlaceHolder1_DataList_xxk"]/tbody`)
 	if table == nil {
 		return nil, errno.HTMLParseError.WithMessage("marks table not found")