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