💄 QR-Code for Vote-ID

http/main.go

@@ -3,6 +3,7 @@ package http
 import (
 	"fmt"
 	"net/http"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -18,6 +19,14 @@ import (
 	"github.com/labstack/echo/middleware"
 )
 
+var BASE_URL = os.Getenv("BASE_URL")
+
+func init() {
+	if BASE_URL == "" {
+		BASE_URL = "http://localhost"
+	}
+}
+
 // Serve takes a bind-address and starts the HTTP server.
 func Serve(bindAddr string) error {
 	e := echo.New()
@@ -31,6 +40,7 @@ func Serve(bindAddr string) error {
 	e.GET("/v", handleVotingForm)
 	e.POST("/v", handleNewVoting)
 	e.GET("/v/:id", handleShowVoting)
+	e.GET("v/:vid/:id", handleShowVote)
 	e.POST("/v/:id", handleVote)
 
 	return e.Start(bindAddr)
@@ -125,10 +135,30 @@ func handleVote(ctx echo.Context) error {
 		return err
 	}
 	store.PlaceVote(id, vid, elector, c)
+	return ctx.Redirect(http.StatusFound, fmt.Sprintf("/v/%s/%s", vid, id))
+}
+
+func handleShowVote(ctx echo.Context) error {
+	var (
+		id  = ctx.Param("id")
+		vid = ctx.Param("vid")
+	)
+
+	url := fmt.Sprintf(
+		"%s/v/%s/%s",
+		BASE_URL,
+		vid,
+		id,
+	)
+	qrCode, err := generateQrCode(url)
+	if err != nil {
+		return err
+	}
 	return ctx.Render(http.StatusFound, "thanks", map[string]interface{}{
-		"Title": "cvote | thx",
-		"Id":    id,
-		"Vid":   vid,
+		"Title":  "cvote | nom nom nom",
+		"Id":     id,
+		"Vid":    vid,
+		"QRCode": qrCode,
 	})
 }
 

http/qr.go

@@ -0,0 +1,15 @@
+package http
+
+import (
+	b64 "encoding/base64"
+
+	"github.com/skip2/go-qrcode"
+)
+
+func generateQrCode(url string) (string, error) {
+	qrCode, err := qrcode.Encode(url, qrcode.Medium, 256)
+	if err != nil {
+		return "", err
+	}
+	return b64.StdEncoding.EncodeToString(qrCode), nil
+}