Fix empty method names in output for Ruby

This fixes the output of the Ruby MaD models when the method name is
empty which can happen when the model applies to a type rather than to
a method.

extensions/ql-vscode/src/model-editor/languages/ruby/index.ts

@@ -29,6 +29,23 @@ function rubyMethodSignature(typeName: string, methodName: string) {
   return `${typeName}#${methodName}`;
 }
 
+function rubyMethodPath(methodName: string) {
+  if (methodName === "") {
+    return "";
+  }
+
+  return `Method[${methodName}]`;
+}
+
+function rubyPath(methodName: string, path: string) {
+  const methodPath = rubyMethodPath(methodName);
+  if (methodPath === "") {
+    return path;
+  }
+
+  return `${methodPath}.${path}`;
+}
+
 export const ruby: ModelsAsDataLanguage = {
   availableModes: [Mode.Framework],
   createMethodSignature: ({ typeName, methodName }) =>
@@ -42,7 +59,7 @@ export const ruby: ModelsAsDataLanguage = {
       // );
       generateMethodDefinition: (method) => [
         method.typeName,
-        `Method[${method.methodName}].${method.output}`,
+        rubyPath(method.methodName, method.output),
         method.kind,
       ],
       readModeledMethod: (row) => {
@@ -71,8 +88,11 @@ export const ruby: ModelsAsDataLanguage = {
       //   string type, string path, string kind
       // );
       generateMethodDefinition: (method) => {
-        const path = `Method[${method.methodName}].${method.input}`;
-        return [method.typeName, path, method.kind];
+        return [
+          method.typeName,
+          rubyPath(method.methodName, method.input),
+          method.kind,
+        ];
       },
       readModeledMethod: (row) => {
         const typeName = row[0] as string;
@@ -101,7 +121,7 @@ export const ruby: ModelsAsDataLanguage = {
       // );
       generateMethodDefinition: (method) => [
         method.typeName,
-        `Method[${method.methodName}]`,
+        rubyMethodPath(method.methodName),
         method.input,
         method.output,
         method.kind,
@@ -131,7 +151,7 @@ export const ruby: ModelsAsDataLanguage = {
       // );
       generateMethodDefinition: (method) => [
         method.typeName,
-        `Method[${method.methodName}]`,
+        rubyMethodPath(method.methodName),
         method.kind,
       ],
       readModeledMethod: (row) => {
@@ -157,7 +177,7 @@ export const ruby: ModelsAsDataLanguage = {
       generateMethodDefinition: (method) => [
         method.relatedTypeName,
         method.typeName,
-        `Method[${method.methodName}].${method.path}`,
+        rubyPath(method.methodName, method.path),
       ],
       readModeledMethod: (row) => {
         const typeName = row[1] as string;