package main

import (
	"encoding/base64"
	"strings"
)

// A naiive subset of what's in a .pixil file
type PixilFrame struct {
	Active  bool   `json:"active"`
	Preview string `json:"preview"`
}
type Pixil struct {
	Width  uint         `json:"width"`
	Height uint         `json:"height"`
	Frames []PixilFrame `json:"frames"`
}

func (frame *PixilFrame) GetPreview() []byte {
	if !frame.Active {
		return nil
	}
	if !strings.HasPrefix(frame.Preview, "data:image/png") {
		return nil
	}
	png := strings.Split(frame.Preview, ",")[1]
	preview, _ := base64.StdEncoding.DecodeString(png)
	return preview
}