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|
package imageprocessor
import (
"mandible/uploadedfile"
)
type multiProcessType []ProcessType
func (this multiProcessType) Process(image *uploadedfile.UploadedFile) error {
for _, processor := range this {
err := processor.Process(image)
if err != nil {
return err
}
}
return nil
}
type asyncProcessType []ProcessType
func (this asyncProcessType) Process(image *uploadedfile.UploadedFile) error {
errs := make(chan error, len(this))
for _, processor := range this {
go func(p ProcessType) {
errs <- p.Process(image)
}(processor)
}
for i := 0; i < len(this); i++ {
select {
case err := <-errs:
if err != nil {
return err
}
}
}
return nil
}
type ProcessType interface {
Process(image *uploadedfile.UploadedFile) error
}
type ImageProcessor struct {
processor ProcessType
}
func (this *ImageProcessor) Run(image *uploadedfile.UploadedFile) error {
return this.processor.Process(image)
}
func Factory(maxFileSize int64, file *uploadedfile.UploadedFile) (*ImageProcessor, error) {
size, err := file.FileSize()
if err != nil {
return &ImageProcessor{}, err
}
processor := multiProcessType{}
processor = append(processor, &ImageOrienter{})
if size > maxFileSize {
processor = append(processor, &ImageScaler{maxFileSize})
}
async := asyncProcessType{}
for _, t := range file.GetThumbs() {
async = append(async, t)
}
if len(async) > 0 {
processor = append(processor, async)
}
return &ImageProcessor{processor}, nil
}
|
