implement get file status

backend/question.go

@@ -0,0 +1,37 @@
+package backend
+
+import (
+	"encoding/json"
+
+	"github.com/fumiama/paper-manager/backend/global"
+)
+
+type question struct {
+	Count int    `json:"count"`
+	Point int    `json:"point"`
+	Name  string `json:"name"`
+}
+
+type duplication struct {
+	Percent int    `json:"percent"`
+	Name    string `json:"name"`
+}
+
+func parseFileQuestions(qb []byte) ([]question, []duplication, error) {
+	ques := make([]global.QuestionJSON, 0, 16)
+	qs := make([]question, 0, 16)
+	ds := make([]duplication, 0, 16)
+	err := json.Unmarshal(qb, &qs)
+	if err != nil {
+		return nil, nil, err
+	}
+	for _, q := range ques {
+		qs = append(qs, question{
+			Count: len(q.Sub),
+			Point: q.Points,
+			Name:  q.Name,
+		})
+		// TODO: use heap to get top 10 ds
+	}
+	return nil, nil, nil
+}