fix(authx): JSON unmarshalling for Dynamic auth type

pkg/authprovider/authx/dynamic.go

@@ -52,14 +52,19 @@ func (d *Dynamic) GetDomainAndDomainRegex() ([]string, []string) {
 }
 
 func (d *Dynamic) UnmarshalJSON(data []byte) error {
-	if err := json.Unmarshal(data, &d); err != nil {
-		return err
+	if d == nil {
+		return errorutil.New("cannot unmarshal into nil Dynamic struct")
 	}
-	var s Secret
-	if err := json.Unmarshal(data, &s); err != nil {
+
+	// Use an alias type (auxiliary) to avoid a recursive call in this method.
+	type Alias Dynamic
+
+	// If d.Secret was nil, json.Unmarshal will allocate a new Secret object
+	// and populate it from the top level JSON fields.
+	if err := json.Unmarshal(data, (*Alias)(d)); err != nil {
 		return err
 	}
-	d.Secret = &s
+
 	return nil
 }
 

pkg/authprovider/authx/dynamic_test.go

@@ -0,0 +1,125 @@
+package authx
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestDynamicUnmarshalJSON(t *testing.T) {
+	t.Run("basic-unmarshal", func(t *testing.T) {
+		data := []byte(`{
+			"template": "test-template.yaml",
+			"variables": [
+				{
+					"key": "username",
+					"value": "testuser"
+				}
+			],
+			"secrets": [
+				{
+					"type": "BasicAuth",
+					"domains": ["example.com"],
+					"username": "user1",
+					"password": "pass1"
+				}
+			],
+			"type": "BasicAuth",
+			"domains": ["test.com"],
+			"username": "testuser",
+			"password": "testpass"
+		}`)
+
+		var d Dynamic
+		err := d.UnmarshalJSON(data)
+		require.NoError(t, err)
+
+		// Secret
+		require.NotNil(t, d.Secret)
+		require.Equal(t, "BasicAuth", d.Secret.Type)
+		require.Equal(t, []string{"test.com"}, d.Secret.Domains)
+		require.Equal(t, "testuser", d.Secret.Username)
+		require.Equal(t, "testpass", d.Secret.Password)
+
+		// Dynamic fields
+		require.Equal(t, "test-template.yaml", d.TemplatePath)
+		require.Len(t, d.Variables, 1)
+		require.Equal(t, "username", d.Variables[0].Key)
+		require.Equal(t, "testuser", d.Variables[0].Value)
+		require.Len(t, d.Secrets, 1)
+		require.Equal(t, "BasicAuth", d.Secrets[0].Type)
+		require.Equal(t, []string{"example.com"}, d.Secrets[0].Domains)
+		require.Equal(t, "user1", d.Secrets[0].Username)
+		require.Equal(t, "pass1", d.Secrets[0].Password)
+	})
+
+	t.Run("complex-unmarshal", func(t *testing.T) {
+		data := []byte(`{
+			"template": "test-template.yaml",
+			"variables": [
+				{
+					"key": "token",
+					"value": "Bearer xyz"
+				}
+			],
+			"secrets": [
+				{
+					"type": "CookiesAuth",
+					"domains": ["example.com"],
+					"cookies": [
+						{
+							"key": "session",
+							"value": "abc123"
+						}
+					]
+				}
+			],
+			"type": "HeadersAuth",
+			"domains": ["api.test.com"],
+			"headers": [
+				{
+					"key": "X-API-Key",
+					"value": "secret-key"
+				}
+			]
+		}`)
+
+		var d Dynamic
+		err := d.UnmarshalJSON(data)
+		require.NoError(t, err)
+
+		// Secret
+		require.NotNil(t, d.Secret)
+		require.Equal(t, "HeadersAuth", d.Secret.Type)
+		require.Equal(t, []string{"api.test.com"}, d.Secret.Domains)
+		require.Len(t, d.Secret.Headers, 1)
+		require.Equal(t, "X-API-Key", d.Secret.Headers[0].Key)
+		require.Equal(t, "secret-key", d.Secret.Headers[0].Value)
+
+		// Dynamic fields
+		require.Equal(t, "test-template.yaml", d.TemplatePath)
+		require.Len(t, d.Variables, 1)
+		require.Equal(t, "token", d.Variables[0].Key)
+		require.Equal(t, "Bearer xyz", d.Variables[0].Value)
+		require.Len(t, d.Secrets, 1)
+		require.Equal(t, "CookiesAuth", d.Secrets[0].Type)
+		require.Equal(t, []string{"example.com"}, d.Secrets[0].Domains)
+		require.Len(t, d.Secrets[0].Cookies, 1)
+		require.Equal(t, "session", d.Secrets[0].Cookies[0].Key)
+		require.Equal(t, "abc123", d.Secrets[0].Cookies[0].Value)
+	})
+
+	t.Run("invalid-json", func(t *testing.T) {
+		data := []byte(`{invalid json}`)
+		var d Dynamic
+		err := d.UnmarshalJSON(data)
+		require.Error(t, err)
+	})
+
+	t.Run("empty-json", func(t *testing.T) {
+		data := []byte(`{}`)
+		var d Dynamic
+		err := d.UnmarshalJSON(data)
+		require.NoError(t, err)
+	})
+}