add support for dialog api

Signed-off-by: Mark Dunphy <markd@spotify.com>

plugins/catalog-react/src/alpha/blueprints/EntityContextMenuItemBlueprint.test.tsx

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React from 'react';
+import { EntityContextMenuItemBlueprint } from './EntityContextMenuItemBlueprint';
+import { createRouteRef, useRouteRef } from '@backstage/frontend-plugin-api';
+
+describe('EntityContextMenuItemBlueprint', () => {
+  const routeRef = createRouteRef();
+  const data = [
+    {
+      loader: async () => <li>Test!</li>,
+    },
+    {
+      title: 'Test',
+      href: '/somewhere',
+      icon: <span>Test</span>,
+    },
+    {
+      title: 'Test',
+      useHref() {
+        const r = useRouteRef(routeRef) ?? (() => '/somewhere');
+        return r();
+      },
+      icon: <span>Test</span>,
+    },
+    {
+      title: 'TestDialog',
+      dialogLoader: async () => () => <div>test dialog</div>,
+      icon: <span>Test</span>,
+    },
+  ];
+
+  it.each(data)('should return an extension with sane defaults', params => {
+    const extension = EntityContextMenuItemBlueprint.make({
+      name: 'test',
+      params,
+    });
+
+    expect(extension).toMatchInlineSnapshot(`
+      {
+        "$$type": "@backstage/ExtensionDefinition",
+        "T": undefined,
+        "attachTo": {
+          "id": "page:catalog/entity",
+          "input": "extraContextMenuItems",
+        },
+        "configSchema": undefined,
+        "disabled": false,
+        "factory": [Function],
+        "inputs": {},
+        "kind": "entity-context-menu-item",
+        "name": "test",
+        "output": [
+          [Function],
+        ],
+        "override": [Function],
+        "toString": [Function],
+        "version": "v2",
+      }
+    `);
+  });
+});

plugins/catalog-react/src/alpha/blueprints/EntityContextMenuItemBlueprint.tsx

@@ -16,9 +16,11 @@
 
 import React from 'react';
 import {
+  DialogApiDialog,
   ExtensionBoundary,
   coreExtensionData,
   createExtensionBlueprint,
+  dialogApiRef,
 } from '@backstage/frontend-plugin-api';
 import MenuItem from '@material-ui/core/MenuItem';
 import ListItemIcon from '@material-ui/core/ListItemIcon';
@@ -42,17 +44,44 @@ export type FactoryHrefParams =
       href: string;
     };
 
+/** @alpha */
+export type FactoryDialogParams = {
+  dialogLoader: () => Promise<
+    ({ dialog }: { dialog: DialogApiDialog }) => JSX.Element
+  >;
+  title: string;
+  icon: JSX.Element;
+};
+
+export type EntityContextMenuItemParams =
+  | FactoryLoaderParams
+  | FactoryHrefParams
+  | FactoryDialogParams;
+
 /** @alpha */
 export const EntityContextMenuItemBlueprint = createExtensionBlueprint({
   kind: 'entity-context-menu-item',
   attachTo: { id: 'page:catalog/entity', input: 'extraContextMenuItems' },
   output: [coreExtensionData.reactElement],
-  *factory(params: FactoryLoaderParams | FactoryHrefParams, { node }) {
+  *factory(params: EntityContextMenuItemParams, { node, apis }) {
     const loaderFactory = () => {
       if ('loader' in params) {
         return params.loader;
       }
 
+      if ('dialogLoader' in params) {
+        const dialogApi = apis.get(dialogApiRef);
+        return async () => {
+          const Dialog = await params.dialogLoader();
+          return (
+            <MenuItem onClick={() => dialogApi?.show(Dialog)}>
+              <ListItemIcon>{params.icon}</ListItemIcon>
+              <ListItemText primary={params.title} />
+            </MenuItem>
+          );
+        };
+      }
+
       const useHref = 'useHref' in params ? params.useHref : () => params.href;
 
       return async () => {