From 6aac2dcb85393030dcec0c2e6cf9d07c8c15ade9 Mon Sep 17 00:00:00 2001
From: andig <andi@evcc.io>
Date: Thu, 6 Mar 2025 18:43:47 +0100
Subject: [PATCH] VW: update api (#19496)

---
 vehicle/vag/vwidentity/forms.go      | 28 ++++++++++++-------------
 vehicle/vag/vwidentity/forms_test.go | 31 ++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 15 deletions(-)
 create mode 100644 vehicle/vag/vwidentity/forms_test.go

diff --git a/vehicle/vag/vwidentity/forms.go b/vehicle/vag/vwidentity/forms.go
index 8c662929d..ceadb0575 100644
--- a/vehicle/vag/vwidentity/forms.go
+++ b/vehicle/vag/vwidentity/forms.go
@@ -3,7 +3,6 @@ package vwidentity
 import (
 	"encoding/json"
 	"errors"
-	"fmt"
 	"io"
 	"regexp"
 	"strings"
@@ -72,27 +71,26 @@ type CredentialParams struct {
 }
 
 func ParseCredentialsPage(r io.ReadCloser) (CredentialParams, error) {
-	var res CredentialParams
-
-	buf := new(strings.Builder)
-	if _, err := io.Copy(buf, r); err != nil {
-		return res, err
+	b, err := io.ReadAll(r)
+	if err != nil {
+		return CredentialParams{}, err
 	}
 
-	re := regexp.MustCompile(`(?s)window._IDK\s*=\s*(.*?)[;<]`)
-	match := re.FindAllStringSubmatch(buf.String(), -1)
+	return parseCredentials(string(b))
+}
+
+func parseCredentials(body string) (CredentialParams, error) {
+	// find js block
+	match := regexp.MustCompile(`(?s)window._IDK\s*=\s*(.*?)[;<]`).FindAllStringSubmatch(body, -1)
 
 	// clean quotes
-	tmpl := strings.ReplaceAll(match[0][1], `'`, `"`)
+	quotes1 := strings.ReplaceAll(match[0][1], `'`, `"`)
+	quotes2 := regexp.MustCompile(`\s(\w+)(?s)*:`).ReplaceAllString(quotes1, `" $1":`)
 
 	// strip , }
-	re2 := regexp.MustCompile(`(?s),\s+}`)
-	tmpl = re2.ReplaceAllString(tmpl, "}")
-
-	for _, v := range []string{"templateModel", "disabledFeatures", "isFooterEnabled", "currentLocale", "csrf_parameterName", "csrf_token", "userSession", "userId", "countryOfResidence", "baseUrl", "consentBaseUrl", "isRTLEnabled"} {
-		tmpl = strings.Replace(tmpl, v, fmt.Sprintf(`"%s"`, v), 1)
-	}
+	tmpl := regexp.MustCompile(`(?s),\s+}`).ReplaceAllString(quotes2, "}")
 
+	var res CredentialParams
 	err := json.Unmarshal([]byte(tmpl), &res)
 
 	return res, err
diff --git a/vehicle/vag/vwidentity/forms_test.go b/vehicle/vag/vwidentity/forms_test.go
new file mode 100644
index 000000000..511b9eae7
--- /dev/null
+++ b/vehicle/vag/vwidentity/forms_test.go
@@ -0,0 +1,31 @@
+package vwidentity
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestParse(t *testing.T) {
+	b := `<script>
+        window._IDK = {
+            templateModel: {"clientLegalEntityModel":{"clientId":"foo@apps_vw-dilab_com","clientAppName":"myAudi App","clientAppDisplayName":"myAudi App","legalEntityInfo":{"name":"Audi","shortName":"AUDI","productName":"Audi ID","theme":"audi","defaultLanguage":"de","termAndConditionsType":"DEFAULT","legalProperties":{"revokeDataContact":"","imprintText":"IMPRINT","countryOfJurisdiction":"DE"}},"informalLanguage":false,"legalEntityCode":"audi","imprintTextKey":"imprint.link.text"},"template":"loginAuthenticate","hmac":"16563a265369fbc1ef1ba126411349a430b1d8b5c1592b6284216dc634169ca3","useClientRendering":true,"titleKey":"title.login.password","title":null,"emailPasswordForm":{"@class":"com.volkswagen.identitykit.signin.domain.model.dto.EmailPasswordForm","email":"foo@bar","password":null},"error":null,"relayState":"be82f61e811860f3b4d8a78365253705bbdeaed4","nextButtonDisabled":false,"enableNextButtonAfterSeconds":0,"postAction":"login/authenticate","identifierUrl":"login/identifier"},
+            disabledFeatures: {
+                isRTLEnabled: false,
+            },
+            currentLocale: 'de-DE',
+            csrf_parameterName: '_csrf',
+            csrf_token: 'pwAX6CTKoSQWsej-9sROQ5LPw8Qy0gCT9oSdFxFxo9VkyNeYxjMg2kevkhY70Iyawul6e_D27qYK5za-leCoJXMSxu1R8eep',
+            userSession: {
+                userId: '',
+                countryOfResidence: ''
+            },
+            baseUrl: 'https://identity.vwgroup.io',
+            consentBaseUrl: 'http://consentapi-service.idk-peu.svc.cluster.local:8080',
+            cancelContractUrl: ''
+        }
+    </script>`
+
+	_, err := parseCredentials(b)
+	require.NoError(t, err)
+}