Added the ability to convert files to different extensions.

encoder/encoder.go

@@ -0,0 +1,79 @@
+package encoder
+
+type EncoderContract interface {
+	GetParams() []string
+}
+
+type EncoderDataContract interface {
+	GetTitle() string
+	GetFormats() []string
+	GetFileType() FileTypeContract
+	NewEncoder() EncoderContract
+}
+
+type Data struct {
+	title    string
+	formats  []string
+	fileType FileTypeContract
+	encoder  func() EncoderContract
+}
+
+func NewData(title string, formats []string, fileType FileTypeContract, encoder func() EncoderContract) *Data {
+	return &Data{
+		title:    title,
+		formats:  formats,
+		fileType: fileType,
+		encoder:  encoder,
+	}
+}
+
+func (data Data) GetTitle() string {
+	return data.title
+}
+
+func (data Data) GetFormats() []string {
+	return data.formats
+}
+
+func (data Data) NewEncoder() EncoderContract {
+	return data.encoder()
+}
+
+func (data Data) GetFileType() FileTypeContract {
+	return data.fileType
+}
+
+type FileTypeContract interface {
+	Name() string
+	Ordinal() int
+}
+
+const (
+	Video = iota
+	Audio
+	Image
+)
+
+type FileType uint
+
+var fileTypeStrings = []string{
+	"video",
+	"audio",
+	"image",
+}
+
+func (fileType FileType) Name() string {
+	return fileTypeStrings[fileType]
+}
+
+func (fileType FileType) Ordinal() int {
+	return int(fileType)
+}
+
+func GetListFileType() []FileTypeContract {
+	return []FileTypeContract{
+		FileType(Video),
+		FileType(Audio),
+		FileType(Image),
+	}
+}