55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package compression
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import (
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"io/ioutil"
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"mime"
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"path/filepath"
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"github.com/lbryio/lbry.go/v2/extras/errors"
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giftowebp "github.com/sizeofint/gif-to-webp"
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"go.uber.org/atomic"
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)
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var inUse atomic.Bool
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var AlreadyInUseErr = errors.Base("already busy compressing")
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var UnsupportedErr = errors.Base("unsupported compression")
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// returns a compressedPath, a mimeType or an error
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func Compress(path, fileName, mimeType, storePath string) (string, string, error) {
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swapped := inUse.CAS(false, true)
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if !swapped {
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return "", "", AlreadyInUseErr
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}
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defer inUse.Store(false)
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file, err := ioutil.ReadFile(path)
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if err != nil {
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return "", "", errors.Err(err)
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}
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switch mimeType {
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case "image/gif":
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converter := giftowebp.NewConverter()
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converter.LoopCompatibility = false
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if len(file) > 500*1024 {
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converter.WebPConfig.SetTargetSize(500 * 1024)
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} else {
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converter.WebPConfig.SetTargetSize(len(file))
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}
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converter.WebPConfig.SetMethod(4)
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webpBin, err := converter.Convert(file)
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if err != nil {
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return "", "", errors.Err(err)
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}
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compressedPath := filepath.Join(storePath, fileName+".webp")
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err = ioutil.WriteFile(compressedPath, webpBin, 0600)
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if err != nil {
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return "", "", errors.Err(err)
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}
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//err = os.Remove(path)
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return fileName + ".webp", mime.TypeByExtension(".webp"), nil
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case mime.TypeByExtension("png"):
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case mime.TypeByExtension("jpeg"):
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case mime.TypeByExtension("jpg"):
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}
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return "", "", UnsupportedErr
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}
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