Add projects

backend/sdk/cliproxy/auth/metadata_merge.go

@@ -0,0 +1,40 @@
+package auth
+
+import (
+	"strings"
+)
+
+// IsAuthTokenPayloadKey returns true if key is a credential or token lifecycle field
+// that should not overwrite newly acquired OAuth credentials during metadata merge.
+func IsAuthTokenPayloadKey(key string) bool {
+	switch strings.ToLower(strings.TrimSpace(key)) {
+	case "access_token", "refresh_token", "id_token", "session_id",
+		"expired", "last_refresh", "expires_in", "timestamp",
+		"token_type", "user_code", "verification_uri", "verification_uri_complete":
+		return true
+	default:
+		return false
+	}
+}
+
+// MergeExistingAuthMetadata merges user-configured metadata fields from existingMap
+// into target.Metadata and target.Storage if target does not already define them.
+func MergeExistingAuthMetadata(target *Auth, existingMap map[string]any) {
+	if target == nil || len(existingMap) == 0 {
+		return
+	}
+	if target.Metadata == nil {
+		target.Metadata = make(map[string]any)
+	}
+	for k, v := range existingMap {
+		if IsAuthTokenPayloadKey(k) {
+			continue
+		}
+		if _, exists := target.Metadata[k]; !exists {
+			target.Metadata[k] = v
+		}
+	}
+	if setter, ok := target.Storage.(interface{ SetMetadata(map[string]any) }); ok {
+		setter.SetMetadata(target.Metadata)
+	}
+}