thumbnail

type Encoder interface {
	// Encode encodes the image to a format.
	Encode(io.Writer, interface{}) error
	// Types returns the formats suffixes.
	Types() []string
	// MimeType returns the mimetype used by the encoder.
	MimeType() string
}

type Generator interface {
	GenerateThumbnail(image.Rectangle, interface{}) (interface{}, error)
}

type GifEncoder struct{}

type GifGenerator struct{}

type JpegEncoder struct{}

type Manager interface {
	// Generate creates a thumbnail and stores it.
	// The function returns a key with which the actual file can be retrieved.
	Generate(Request, interface{}) (string, error)
	// CheckThumbnail checks if a thumbnail with the requested attributes exists.
	// The function will return a status if the file exists and the key to the file.
	CheckThumbnail(Request) (string, bool)
	// GetThumbnail will load the thumbnail from the storage and return its content.
	GetThumbnail(key string) ([]byte, error)
}

type PngEncoder struct{}

type Request struct {
	Resolution image.Rectangle
	Encoder    Encoder
	Generator  Generator
	Checksum   string
}

type Resolutions []image.Rectangle

type SimpleGenerator struct{}

type SimpleManager struct {
	// contains filtered or unexported fields
}