Add task attachments to export

pkg/models/export.go

@@ -25,6 +25,7 @@ import (
 	"code.vikunja.io/api/pkg/user"
 	"encoding/json"
 	"fmt"
+	"io"
 	"os"
 	"strconv"
 	"time"
@@ -131,5 +132,39 @@ func exportListsAndTasks(s *xorm.Session, u *user.User, wr *zip.Writer) (err err
 }
 
 func exportTaskAttachments(s *xorm.Session, u *user.User, wr *zip.Writer) (err error) {
-	return nil
+	lists, _, _, err := getRawListsForUser(
+		s,
+		&listOptions{
+			user: u,
+			page: -1,
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	tasks, _, _, err := getRawTasksForLists(s, lists, u, &taskOptions{page: -1})
+	if err != nil {
+		return err
+	}
+
+	taskIDs := []int64{}
+	for _, t := range tasks {
+		taskIDs = append(taskIDs, t.ID)
+	}
+
+	tas, err := getTaskAttachmentsByTaskIDs(s, taskIDs)
+	if err != nil {
+		return err
+	}
+
+	files := make(map[int64]io.ReadCloser)
+	for _, ta := range tas {
+		if err := ta.File.LoadFileByID(); err != nil {
+			return err
+		}
+		files[ta.FileID] = ta.File.File
+	}
+
+	return dump.WriteFilesToZip(files, wr)
 }