Add txqr package

txqr.go

@@ -0,0 +1,48 @@
+package txqr
+
+import (
+	"fmt"
+	"image"
+
+	"github.com/divan/txqr/protocol"
+	"github.com/divan/txqr/qr"
+)
+
+func Encode(str string) (<-chan image.Image, error) {
+	size := 100
+	chunks, err := protocol.NewEncoder(size).Encode(str)
+	if err != nil {
+		return nil, fmt.Errorf("encode: %v", err)
+	}
+	ch := make(chan image.Image)
+
+	go func(ch chan<- image.Image) {
+		defer close(ch)
+		for _, chunk := range chunks {
+			img, err := qr.Encode(chunk, 512)
+			if err != nil {
+				// TODO: handle error better
+				fmt.Errorf("[ERROR] encode: %v", err)
+				continue
+			}
+			ch <- img
+		}
+	}(ch)
+
+	return ch, nil
+}
+
+func Decode(ch <-chan image.Image) (string, error) {
+	dec := protocol.NewDecoder()
+	for img := range ch {
+		chunk, err := qr.Decode(img)
+		if err != nil {
+			return "", fmt.Errorf("decode: %v", err)
+		}
+		err = dec.DecodeChunk(chunk)
+		if err != nil {
+			return "", fmt.Errorf("decode chunk: %v", err)
+		}
+	}
+	return dec.Data(), nil
+}

txqr_test.go

@@ -0,0 +1,18 @@
+package txqr
+
+import "testing"
+
+func TestTXQR(t *testing.T) {
+	str := "hello, world!"
+	ch, err := Encode(str)
+	if err != nil {
+		t.Fatalf("Encode failed: %v", err)
+	}
+	got, err := Decode(ch)
+	if err != nil {
+		t.Fatalf("Decode failed: %v", err)
+	}
+	if got != str {
+		t.Fatalf("Expected '%s', but got '%s'", str, got)
+	}
+}