add optional array type

src/components/inspector.tsx

@@ -637,6 +637,7 @@ const NodeInspector: FC = () => {
                                 }}
                                 style={{ width: "100%" }}
                                 icon={<PlusOutlined />}
+                                danger={items.length === 0 && !isNodeArgOptional(arg)}
                               >
                                 {t("node.args.add")}
                               </Button>

src/misc/b3type.ts

@@ -8,24 +8,31 @@ export interface NodeArg {
     | "boolean"
     | "boolean?"
     | "boolean[]"
+    | "boolean[]?"
     | "int"
     | "int?"
     | "int[]"
+    | "int[]?"
     | "float"
     | "float?"
     | "float[]"
+    | "float[]?"
     | "string"
     | "string?"
     | "string[]"
+    | "string[]?"
     | "json"
     | "json?"
     | "json[]"
+    | "json[]?"
     | "enum"
     | "enum?"
     | "enum[]"
+    | "enum[]?"
     | "code"
     | "code?"
-    | "code[]";
+    | "code[]"
+    | "code[]?";
   desc: string;
   oneof?: string;
   default?: unknown;

src/misc/b3util.ts

@@ -199,13 +199,11 @@ export const checkNodeArg = (
   const arg = conf.args![i] as NodeArg;
   const value = data.args?.[arg.name];
   if (isNodeArgArray(arg)) {
-    if (!Array.isArray(value)) {
-      if (value !== undefined) {
+    if (!Array.isArray(value) || (!isNodeArgOptional(arg) && value.length === 0)) {
       if (verbose) {
-          error(data, `'${arg.name}=${value}' is not an array`);
+        error(data, `'${arg.name}=${JSON.stringify(value)}' is not an array or empty array`);
       }
       hasError = true;
-      }
     } else {
       for (let j = 0; j < value.length; j++) {
         if (!checkNodeArgValue(data, arg, value[j], verbose)) {
@@ -300,13 +298,11 @@ export const checkNodeData = (data: NodeModel | null | undefined) => {
     for (let i = 0; i < conf.args.length; i++) {
       const key = conf.args[i].name;
       const value = data.args?.[key];
-      if (!checkNodeArg(data, conf, i, true)) {
-        hasError = true;
-      }
       if (value !== undefined) {
         args[key] = value;
-      } else if (isNodeArgArray(conf.args[i])) {
-        args[key] = [];
+      }
+      if (!checkNodeArg(data, conf, i, true)) {
+        hasError = true;
       }
     }
     data.args = args;