Release v0.3.0

vendor/github.com/muun/libwallet/emergencykit/emergencykit.go

@@ -0,0 +1,91 @@
+package emergencykit
+
+import (
+	"bytes"
+	"crypto/rand"
+	"fmt"
+	"text/template"
+	"time"
+)
+
+// Input struct to fill the PDF
+type Input struct {
+	FirstEncryptedKey  string
+	SecondEncryptedKey string
+}
+
+// Output with the html as string and the verification code
+type Output struct {
+	HTML             string
+	VerificationCode string
+}
+
+// GenerateHTML returns the translated emergency kit html as a string along with the verification code.
+func GenerateHTML(params *Input, lang string) (*Output, error) {
+	verificationCode := randomCode(6)
+
+	content, err := render("EmergencyKitContent", lang, &contentData{
+		FirstEncryptedKey:  params.FirstEncryptedKey,
+		SecondEncryptedKey: params.SecondEncryptedKey,
+		VerificationCode:   verificationCode,
+		// Careful: do not change these format values. See this doc for more info: https://golang.org/pkg/time/#pkg-constants
+		CurrentDate: time.Now().Format("2006/01/02"), // Format date to YYYY/MM/DD
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to render EmergencyKitContent template: %w", err)
+	}
+
+	page, err := render("EmergencyKitPage", lang, &pageData{
+		Css:     css,
+		Logo:    logo,
+		Content: content,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to render EmergencyKitPage template: %w", err)
+	}
+
+	return &Output{
+		HTML:             page,
+		VerificationCode: verificationCode,
+	}, nil
+}
+
+func randomCode(length int) string {
+	result := make([]byte, length)
+	_, err := rand.Read(result)
+	if err != nil {
+		panic(err)
+	}
+	charset := "0123456789"
+	for i := 0; i < length; i++ {
+		result[i] = charset[int(result[i])%len(charset)]
+	}
+	return string(result)
+}
+
+func render(name, language string, data interface{}) (string, error) {
+	tmpl, err := template.New(name).Parse(getContent(name, language))
+	if err != nil {
+		return "", err
+	}
+	var buf bytes.Buffer
+	err = tmpl.Execute(&buf, data)
+	if err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
+
+func getContent(name string, language string) string {
+	switch name {
+	case "EmergencyKitPage":
+		return page
+	case "EmergencyKitContent":
+		if language == "es" {
+			return contentES
+		}
+		return contentEN
+	default:
+		panic("could not find template with name: " + name)
+	}
+}