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incorporate requested changes

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Signed-off-by: Christian Richter <crichter@owncloud.com>
This commit is contained in:
Christian Richter
2023-11-28 09:53:23 +01:00
parent b38babda1b
commit ba5a050ab8
1 changed files with 13 additions and 2 deletions
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15
services/thumbnails/pkg/preprocessor/preprocessor.go
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@@ -4,7 +4,6 @@ import (
"archive/zip"
"bufio"
"bytes"
"fmt"
"image"
"image/draw"
"image/gif"
@@ -22,12 +21,15 @@ import (
"github.com/dhowden/tag"
)
// FileConverter is the interface for the file converter
type FileConverter interface {
Convert(r io.Reader) (interface{}, error)
}
// ImageDecoder is a converter for the image file
type ImageDecoder struct{}
// Convert reads the image file and returns the thumbnail image
func (i ImageDecoder) Convert(r io.Reader) (interface{}, error) {
img, err := imaging.Decode(r, imaging.AutoOrientation(true))
if err != nil {
@@ -36,8 +38,10 @@ func (i ImageDecoder) Convert(r io.Reader) (interface{}, error) {
return img, nil
}
// GifDecoder is a converter for the gif file
type GifDecoder struct{}
// Convert reads the gif file and returns the thumbnail image
func (i GifDecoder) Convert(r io.Reader) (interface{}, error) {
img, err := gif.DecodeAll(r)
if err != nil {
@@ -46,8 +50,10 @@ func (i GifDecoder) Convert(r io.Reader) (interface{}, error) {
return img, nil
}
// GgsDecoder is a converter for the geogebra slides file
type GgsDecoder struct{}
// Convert reads the ggs file and returns the thumbnail image
func (g GgsDecoder) Convert(r io.Reader) (interface{}, error) {
geogebraThumbnail := "_slide0/geogebra_thumbnail.png"
var buf bytes.Buffer
@@ -73,11 +79,13 @@ func (g GgsDecoder) Convert(r io.Reader) (interface{}, error) {
return img, nil
}
}
return nil, errors.New(fmt.Sprintf("%s not found", geogebraThumbnail))
return nil, errors.Errorf("%s not found", geogebraThumbnail)
}
// AudioDecoder is a converter for the audio file
type AudioDecoder struct{}
// Convert reads the audio file and extracts the thumbnail image from the id3 tag
func (i AudioDecoder) Convert(r io.Reader) (interface{}, error) {
b, err := io.ReadAll(r)
if err != nil {
@@ -101,10 +109,12 @@ func (i AudioDecoder) Convert(r io.Reader) (interface{}, error) {
return converter.Convert(bytes.NewReader(picture.Data))
}
// TxtToImageConverter is a converter for the text file
type TxtToImageConverter struct {
fontLoader *FontLoader
}
// Convert reads the text file and renders it into a thumbnail image
func (t TxtToImageConverter) Convert(r io.Reader) (interface{}, error) {
img := image.NewRGBA(image.Rect(0, 0, 640, 480))
@@ -221,6 +231,7 @@ func drawWord(canvas *font.Drawer, word string, minX, maxX, incY, maxY fixed.Int
}
}
// ForType returns the converter for the specified mimeType
func ForType(mimeType string, opts map[string]interface{}) FileConverter {
// We can ignore the error here because we parse it in IsMimeTypeSupported before and if it fails
// return the service call. So we should only get here when the mimeType parses fine.