first draft at gradient controller

	r.HandleFunc("/squares", squares.Random)

	r.HandleFunc("/squares/banner/random", squares.BannerRandom)

	r.HandleFunc("/squares/banner/random/gradient", squares.BannerRandomGradient)

	r.HandleFunc("/squares/gradient", squares.Gradient)

	r.HandleFunc("/squares/:key", squares.Square) //cached

	r.HandleFunc("/isogrids/banner/random", isogrids.BannerRandom)

package squares

import (

	"crypto/md5"

	"fmt"

	"image/color"

	"io"

	"log"

	"net/http"

	"github.com/taironas/route"

	"github.com/taironas/tinygraphs/colors"

	"github.com/taironas/tinygraphs/draw/squares"

	"github.com/taironas/tinygraphs/extract"

	"github.com/taironas/tinygraphs/write"

)

// Gradient handler for "/squares/gradient"

// generates a color gradient random grid image.

func Gradient(w http.ResponseWriter, r *http.Request) {

	var err error

	var key string

	if key, err = route.Context.Get(r, "key"); err != nil {

		log.Println("Unable to get 'key' value: ", err)

		key = "hello"

	}

	theme := extract.Theme(r)

	h := md5.New()

	io.WriteString(h, key)

	key = fmt.Sprintf("%x", h.Sum(nil)[:])

	numColors := extract.NumColors(r)

	colorMap := colors.MapOfColorThemes()

	bg, fg := extract.ExtraColors(r, colorMap)

	var colors []color.RGBA

	if theme != "base" {

		if _, ok := colorMap[theme]; ok {

			colors = append(colors, colorMap[theme][0:numColors]...)

		} else {

			colors = append(colors, colorMap["base"]...)

		}

	} else {

		colors = append(colors, bg, fg)

	}

	size := extract.Size(r)

	// if f := extract.Format(r); f == format.JPEG {

	// 	m := image.NewRGBA(image.Rect(0, 0, size, size))

	// 	squares.Squares(m, key, colors)

	// 	var img image.Image = m

	// 	write.ImageJPEG(w, &img)

	// } else if f == format.SVG {

	write.ImageSVG(w)

	squares.GradientSVG(w, key, colors, size)

	// }

}