WASM Webapp and initial support for SVG rendering

.gitignore

@@ -1,4 +1,7 @@
 data/
 vendor/
 *.png
-nids/samples
+*.svg
+nids/samples
+testdata/
+.DS_Store

cmd/nexrad-render/.gitignore

@@ -1,6 +1,11 @@
 nexrad-render
+radials
 out/
 *.gif
 *.png
 *.ar2v
-*.tar
+*.tar
+*.wasm
+*.gz
+*.tar.gz
+*.zip

cmd/nexrad-render/dump/svgMinify.go

@@ -0,0 +1,124 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"math"
+	"os"
+	"strconv"
+
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/minify/v2/svg"
+)
+
+func minifySvg(largeInputFile string, outputFile string) {
+	// read the input file
+	content, err := ioutil.ReadFile(largeInputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	text := string(content)
+	//textSmaller := text[0:100]
+	//fmt.Println(textSmaller)
+
+	// minify the large file
+	m := minify.New()
+	m.Add("image/svg+xml", &svg.Minifier{
+		Precision: 10,
+	})
+	//in := "Because my coffee was too cold, I heated it in the microwave."
+	out, err := m.String("image/svg+xml", text)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// writes minified content to another file
+	f, err := os.Create(outputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	_, err2 := f.WriteString(out)
+	if err2 != nil {
+		log.Fatal(err2)
+	}
+
+	// gets the filesize of each file
+	// large file
+	largeinfo, err := os.Stat(largeInputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	largeFileSizeInt := largeinfo.Size()
+	largeFileSize := HumanFileSize(float64(largeFileSizeInt))
+	//largeFileSize := strconv.Itoa(int(largeFileSizeInt))
+	// output file
+	outputinfo, err := os.Stat(outputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	outputFileSizeInt := outputinfo.Size()
+	outputFileSize := HumanFileSize(float64(outputFileSizeInt))
+	//outputFileSize := strconv.Itoa(int(outputFileSizeInt))
+
+	fmt.Println("Minified", largeInputFile, "(" + largeFileSize + ")", "->", outputFile, "(" + outputFileSize + ")")
+}
+
+/*
+* Convert bytes to human readable format
+* https://hakk.dev/docs/golang-convert-file-size-human-readable/
+*/
+var (
+	suffixes [5]string
+)
+func Round(val float64, roundOn float64, places int ) (newVal float64) {
+	var round float64
+	pow := math.Pow(10, float64(places))
+	digit := pow * val
+	_, div := math.Modf(digit)
+	if div >= roundOn {
+		round = math.Ceil(digit)
+	} else {
+		round = math.Floor(digit)
+	}
+	newVal = round / pow
+	return
+}
+func HumanFileSize(size float64) string {
+	//fmt.Println(size)
+	suffixes[0] = "B"
+	suffixes[1] = "KB"
+	suffixes[2] = "MB"
+	suffixes[3] = "GB"
+	suffixes[4] = "TB"
+
+	base := math.Log(size)/math.Log(1024)
+	getSize := Round(math.Pow(1024, base - math.Floor(base)), .5, 2)
+	//fmt.Println(int(math.Floor(base)))
+	getSuffix := suffixes[int(math.Floor(base))]
+	return strconv.FormatFloat(getSize, 'f', -1, 64)+" "+string(getSuffix)
+}
+
+func getBitOfSvg(inputFile string, outputFile string, firstN int) {
+	// read the input file
+	content, err := ioutil.ReadFile(inputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	text := string(content)
+	textSmaller := text[0:firstN]
+	//fmt.Println(textSmaller)
+	// writes minified content to another file
+	f, err := os.Create(outputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	_, err2 := f.WriteString(textSmaller)
+	if err2 != nil {
+		log.Fatal(err2)
+	}
+
+	fmt.Println("Extracted first", firstN, "chars of svg to", outputFile)
+}