Move some functions to service layer (#26969)

models/issues/issue.go

@@ -892,3 +892,50 @@ func IsNewPinAllowed(ctx context.Context, repoID int64, isPull bool) (bool, erro
 func IsErrIssueMaxPinReached(err error) bool {
 	return err == ErrIssueMaxPinReached
 }
+
+// InsertIssues insert issues to database
+func InsertIssues(issues ...*Issue) error {
+	ctx, committer, err := db.TxContext(db.DefaultContext)
+	if err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	for _, issue := range issues {
+		if err := insertIssue(ctx, issue); err != nil {
+			return err
+		}
+	}
+	return committer.Commit()
+}
+
+func insertIssue(ctx context.Context, issue *Issue) error {
+	sess := db.GetEngine(ctx)
+	if _, err := sess.NoAutoTime().Insert(issue); err != nil {
+		return err
+	}
+	issueLabels := make([]IssueLabel, 0, len(issue.Labels))
+	for _, label := range issue.Labels {
+		issueLabels = append(issueLabels, IssueLabel{
+			IssueID: issue.ID,
+			LabelID: label.ID,
+		})
+	}
+	if len(issueLabels) > 0 {
+		if _, err := sess.Insert(issueLabels); err != nil {
+			return err
+		}
+	}
+
+	for _, reaction := range issue.Reactions {
+		reaction.IssueID = issue.ID
+	}
+
+	if len(issue.Reactions) > 0 {
+		if _, err := sess.Insert(issue.Reactions); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}