From de9f686480f3a36aa2ce37490e3c19790af1043c Mon Sep 17 00:00:00 2001
From: kolaente <k@knt.li>
Date: Mon, 12 Aug 2024 17:18:07 +0200
Subject: [PATCH] fix(migration): ensure project background gets exported and
 imported

(cherry picked from commit ebfd5f54d2e4644aa2076c57a9b50ed5b87deaa9)
---
 pkg/models/export.go                          |  5 +++++
 pkg/modules/migration/vikunja-file/vikunja.go | 10 +++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/pkg/models/export.go b/pkg/models/export.go
index fe3a0e5e8..ad75f6d73 100644
--- a/pkg/models/export.go
+++ b/pkg/models/export.go
@@ -147,6 +147,11 @@ func exportProjectsAndTasks(s *xorm.Session, u *user.User, wr *zip.Writer) (task
 	projectsMap := make(map[int64]*ProjectWithTasksAndBuckets, len(rawProjects))
 	projectIDs := []int64{}
 	for _, p := range rawProjects {
+		if p.BackgroundFileID > 0 {
+			p.BackgroundInformation = &files.File{
+				ID: p.BackgroundFileID,
+			}
+		}
 		pp := &ProjectWithTasksAndBuckets{
 			Project: *p,
 		}
diff --git a/pkg/modules/migration/vikunja-file/vikunja.go b/pkg/modules/migration/vikunja-file/vikunja.go
index 1cdf5c29f..d05be1671 100644
--- a/pkg/modules/migration/vikunja-file/vikunja.go
+++ b/pkg/modules/migration/vikunja-file/vikunja.go
@@ -228,7 +228,15 @@ func addDetailsToProjectAndChildren(p *models.ProjectWithTasksAndBuckets, stored
 }
 
 func addDetailsToProject(l *models.ProjectWithTasksAndBuckets, storedFiles map[int64]*zip.File) (err error) {
-	if b, exists := storedFiles[l.BackgroundFileID]; exists {
+	var backgroundFileID int64
+	bginfo, is := l.BackgroundInformation.(map[string]interface{})
+	if is {
+		bgid, has := bginfo["id"]
+		if has {
+			backgroundFileID = int64(bgid.(float64))
+		}
+	}
+	if b, exists := storedFiles[backgroundFileID]; exists {
 		bf, err := b.Open()
 		if err != nil {
 			return fmt.Errorf("could not open project background file %d for reading: %w", l.BackgroundFileID, err)