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thumbnail.go
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thumbnail.go
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package thumbnailing
import (
"errors"
"io"
"io/ioutil"
"reflect"
"github.com/turt2live/matrix-media-repo/common/rcontext"
"github.com/turt2live/matrix-media-repo/thumbnailing/i"
"github.com/turt2live/matrix-media-repo/thumbnailing/m"
"github.com/turt2live/matrix-media-repo/util"
"github.com/turt2live/matrix-media-repo/util/cleanup"
)
var ErrUnsupported = errors.New("unsupported thumbnail type")
func IsSupported(contentType string) bool {
return util.ArrayContains(i.GetSupportedContentTypes(), contentType)
}
func IsAnimationSupported(contentType string) bool {
return util.ArrayContains(i.GetSupportedAnimationTypes(), contentType)
}
func GenerateThumbnail(imgStream io.ReadCloser, contentType string, width int, height int, method string, animated bool, ctx rcontext.RequestContext) (*m.Thumbnail, error) {
if !IsSupported(contentType) {
return nil, ErrUnsupported
}
defer cleanup.DumpAndCloseStream(imgStream)
b, err := ioutil.ReadAll(imgStream)
if err != nil {
return nil, err
}
generator := i.GetGenerator(b, contentType, animated)
if generator == nil {
return nil, ErrUnsupported
}
ctx.Log.Info("Using generator: ", reflect.TypeOf(generator).Name())
return generator.GenerateThumbnail(b, contentType, width, height, method, animated, ctx)
}
func GetGenerator(imgStream io.ReadCloser, contentType string, animated bool) (i.Generator, error) {
defer cleanup.DumpAndCloseStream(imgStream)
b, err := ioutil.ReadAll(imgStream)
if err != nil {
return nil, err
}
generator := i.GetGenerator(b, contentType, animated)
if generator == nil {
return nil, ErrUnsupported
}
return generator, nil
}