Add debug logs

pkg/modules/avatar/upload/upload.go

@@ -19,6 +19,7 @@ package upload
 import (
 	"bytes"
 	"code.vikunja.io/api/pkg/files"
+	"code.vikunja.io/api/pkg/log"
 	"code.vikunja.io/api/pkg/user"
 	"github.com/disintegration/imaging"
 	"image"
@@ -46,15 +47,20 @@ func (p *Provider) GetAvatar(u *user.User, size int64) (avatar []byte, mimeType
 	a, cached := resizedCache[u.ID]
 	if cached {
 		if a != nil && a[size] != nil {
+			log.Debugf("Serving uploaded avatar for user %d and size %d from cache.", u.ID, size)
 			return a[size], "", nil
 		}
+		// This means we have a map for the user, but nothing in it.
 		if a == nil {
 			resizedCache[u.ID] = make(map[int64][]byte)
 		}
 	} else {
+		// Nothing ever cached for this user so we need to create the size map to avoid panics
 		resizedCache[u.ID] = make(map[int64][]byte)
 	}
 
+	log.Debugf("Uploaded avatar for user %d and size %d not cached, resizing and caching.", u.ID, size)
+
 	// If we get this far, the avatar is either not cached at all or not in this size
 	f := &files.File{ID: u.AvatarFileID}
 	if err := f.LoadFileByID(); err != nil {