add extract code #62 (ebcff1f7) · Commits · blackheaven / tinygraphs

extract/extract.go

+25 −2

Original line number	Diff line number	Diff line
		@@ -16,7 +16,7 @@ import (
		func Background(req *http.Request) (color.RGBA, error) {
		bg := req.FormValue("bg")
		if len(bg) == 0 {
		return color.RGBA{}, fmt.Errorf("background: wrong input")
		return color.RGBA{}, fmt.Errorf("background: empty input")
		}
		r, g, b, err := hexToRGB(bg)
		return color.RGBA{uint8(r), uint8(g), uint8(b), uint8(255)}, err
		@@ -26,12 +26,35 @@ func Background(req *http.Request) (color.RGBA, error) {
		func Foreground(req *http.Request) (color.RGBA, error) {
		fg := req.FormValue("fg")
		if len(fg) == 0 {
		return color.RGBA{}, fmt.Errorf("background: wrong input")
		return color.RGBA{}, fmt.Errorf("background: empty input")
		}
		r, g, b, err := hexToRGB(fg)
		return color.RGBA{uint8(r), uint8(g), uint8(b), uint8(255)}, err
		}

		// Colors extract an array of hexadecimal colors and returns an array of color.RGBA
		func Colors(req *http.Request) ([]color.RGBA, error) {
		if err := req.ParseForm(); err != nil {
		return []color.RGBA{}, fmt.Errorf("colors: unable to parse form")
		}

		var colors []color.RGBA
		strColors := req.Form["colors"]
		if len(strColors) == 0 {
		return []color.RGBA{}, fmt.Errorf("colors: empty input")
		}

		for _, c := range strColors {
		if r, g, b, err := hexToRGB(c); err != nil {
		return colors, fmt.Errorf("colors: wrong input")
		} else {
		new := color.RGBA{uint8(r), uint8(g), uint8(b), uint8(255)}
		colors = append(colors, new)
		}
		}
		return colors, nil
		}

		// ExtraColors returns a background and foreground color.RGBA is specified, else black and white.
		func ExtraColors(req *http.Request, m map[string][]color.RGBA) (color.RGBA, color.RGBA) {
		var err error