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feat: generate a BlurHash when uploading a new image

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This commit is contained in:
kolaente
2021-12-12 21:42:35 +01:00
committed by Gitea
parent 362706b38d
commit f83b09af59
5 changed files with 47 additions and 17 deletions
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37
pkg/modules/background/handler/background.go
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@ -17,6 +17,9 @@
package handler
import (
"github.com/bbrks/go-blurhash"
"golang.org/x/image/draw"
"image"
"io"
"net/http"
"strconv"
@ -134,6 +137,18 @@ func (bp *BackgroundProvider) SetBackground(c echo.Context) error {
return c.JSON(http.StatusOK, list)
}
func CreateBlurHash(srcf io.Reader) (hash string, err error) {
src, _, err := image.Decode(srcf)
if err != nil {
return "", err
}
dst := image.NewRGBA(image.Rect(0, 0, 32, 32))
draw.NearestNeighbor.Scale(dst, dst.Rect, src, src.Bounds(), draw.Over, nil)
return blurhash.Encode(4, 3, dst)
}
// UploadBackground uploads a background and passes the id of the uploaded file as an Image to the Set function of the BackgroundProvider.
func (bp *BackgroundProvider) UploadBackground(c echo.Context) error {
s := db.NewSession()
@ -153,15 +168,15 @@ func (bp *BackgroundProvider) UploadBackground(c echo.Context) error {
_ = s.Rollback()
return err
}
src, err := file.Open()
srcf, err := file.Open()
if err != nil {
_ = s.Rollback()
return err
}
defer src.Close()
defer srcf.Close()
// Validate we're dealing with an image
mime, err := mimetype.DetectReader(src)
mime, err := mimetype.DetectReader(srcf)
if err != nil {
_ = s.Rollback()
return handler.HandleHTTPError(err, c)
@ -170,10 +185,10 @@ func (bp *BackgroundProvider) UploadBackground(c echo.Context) error {
_ = s.Rollback()
return c.JSON(http.StatusBadRequest, models.Message{Message: "Uploaded file is no image."})
}
_, _ = src.Seek(0, io.SeekStart)
_, _ = srcf.Seek(0, io.SeekStart)
// Save the file
f, err := files.CreateWithMime(src, file.Filename, uint64(file.Size), auth, mime.String())
f, err := files.CreateWithMime(srcf, file.Filename, uint64(file.Size), auth, mime.String())
if err != nil {
_ = s.Rollback()
if files.IsErrFileIsTooLarge(err) {
@ -183,9 +198,16 @@ func (bp *BackgroundProvider) UploadBackground(c echo.Context) error {
return handler.HandleHTTPError(err, c)
}
image := &background.Image{ID: strconv.FormatInt(f.ID, 10)}
// Generate a blurHash
_, _ = srcf.Seek(0, io.SeekStart)
list.BackgroundBlurHash, err = CreateBlurHash(srcf)
if err != nil {
return handler.HandleHTTPError(err, c)
}
err = p.Set(s, image, list, auth)
// Save it
img := &background.Image{ID: strconv.FormatInt(f.ID, 10)}
err = p.Set(s, img, list, auth)
if err != nil {
_ = s.Rollback()
return handler.HandleHTTPError(err, c)
@ -300,6 +322,7 @@ func RemoveListBackground(c echo.Context) error {
list.BackgroundFileID = 0
list.BackgroundInformation = nil
list.BackgroundBlurHash = ""
err = models.UpdateList(s, list, auth, true)
if err != nil {
return err