Avoid redundant code for interactive parameters query

scripts/yt-api-helper.sh

@@ -262,12 +262,6 @@ case $endpoint_option in
 			if [ -z $browse_id ]; then browse_id="UCXuqSBlHAE6Xw-yeJA0Tunw"; fi
 			partial_data="\"browseId\":\"${browse_id}\""
 
-			printf "Enter optional parameters (base64-encoded protobuf) []: "
-			read params
-
-			if [ ! -z $params ]; then
-				partial_data="${partial_data},\"params\":\"${params}\""
-			fi
 		fi
 	;;
 
@@ -292,16 +286,6 @@ case $endpoint_option in
 
 			if [ -z $vid ]; then vid="dQw4w9WgXcQ"; fi
 			partial_data="\"videoId\":\"${vid}\""
-
-
-			if [ "$endpoint_option" = "player" ]; then
-				printf "Enter optional parameters (base64-encoded protobuf) []: "
-				read params
-
-				if [ ! -z $params ]; then
-					partial_data="${partial_data},\"params\":\"${params}\""
-				fi
-			fi
 		fi
 	;;
 
@@ -338,6 +322,28 @@ case $endpoint_option in
 esac
 
 
+#
+# Interactively request additional parameters for the supported endpoints
+#
+
+if [ $interactive = true ]
+then
+	case $endpoint_option in
+
+	browse|player)
+		params=$(query_with_default "Enter optional parameters (base64-encoded protobuf)" "")
+
+		if [ ! -z $params ]; then
+			partial_data="${partial_data},\"params\":\"${params}\""
+		fi
+	;;
+	esac
+fi
+
+# new line
+echo
+
+
 #
 # Interactive language/region selection
 #