Reorg

contactcard.go

@@ -0,0 +1,99 @@
+package meowlib
+
+import (
+	"encoding/json"
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"log"
+	"math"
+	"os"
+
+	"github.com/makiuchi-d/gozxing"
+	"github.com/makiuchi-d/gozxing/qrcode"
+)
+
+func ServerFromUrl(url string) *Server {
+	var s Server
+	s.Url = url
+	return &s
+}
+
+func (contact *ContactCard) AddUrls(urls []string) {
+	for _, url := range urls {
+		contact.PullServers = append(contact.PullServers, ServerFromUrl(url))
+	}
+}
+
+func (contact *ContactCard) WritePng(filename string) {
+	jsonContact, _ := json.Marshal(contact)
+	//imgdata := base64.StdEncoding.EncodeToString(jsonContact)
+	size := int(math.Sqrt(float64(len(jsonContact))/3)) + 1
+	println(size)
+
+	// Create a colored i	mage of the given width and height.
+	img := image.NewNRGBA(image.Rect(0, 0, size, size))
+
+	for y := 0; y < size; y++ {
+		for x := 0; x < size*3; x = x + 3 {
+			p1 := uint8(jsonContact[x+y])
+			p2 := uint8(jsonContact[x+y+1])
+			p3 := uint8(jsonContact[x+y+2])
+			img.Set(x/3, y, color.NRGBA{
+				R: p1,
+				G: p2,
+				B: p3,
+				A: 255,
+			})
+		}
+	}
+
+	f, err := os.Create(filename)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if err := png.Encode(f, img); err != nil {
+		f.Close()
+		log.Fatal(err)
+	}
+
+	if err := f.Close(); err != nil {
+		log.Fatal(err)
+	}
+
+}
+
+func (contact *ContactCard) WriteQr(filename string) {
+	jsonContact, _ := json.Marshal(contact)
+	qwriter := qrcode.NewQRCodeWriter()
+	code, err := qwriter.Encode(string(jsonContact), gozxing.BarcodeFormat_QR_CODE, 512, 512, nil)
+	if err != nil {
+		println(err.Error())
+	}
+	file, _ := os.Create("barcode.png")
+	defer file.Close()
+
+	// *BitMatrix implements the image.Image interface,
+	// so it is able to be passed to png.Encode directly.
+	_ = png.Encode(file, code)
+
+}
+
+func ReadQr(fielname string) ContactCard {
+	var contact ContactCard
+	// open and decode image file
+	file, _ := os.Open("qrcode.jpg")
+	img, _, _ := image.Decode(file)
+
+	// prepare BinaryBitmap
+	bmp, _ := gozxing.NewBinaryBitmapFromImage(img)
+
+	// decode image
+	qrReader := qrcode.NewQRCodeReader()
+	result, _ := qrReader.Decode(bmp, nil)
+
+	fmt.Println(result)
+	return contact
+}