Add MCP Resource trigger templates for JavaScript and TypeScript (#4966)

* Adding the Mcp Resource Templates

* Adding the template for VSCode

Author: swapnil-nagar

resources/backupTemplates/nodejs-4.x/templates/templates.json

@@ -656,5 +656,47 @@
             "enabledInTryMode": true,
             "userPrompt": []
         }
+    },
+    {
+        "id": "McpResourceTrigger-JavaScript-4.x",
+        "runtime": "2",
+        "files": {
+            "%functionName%.js": "const { app } = require('@azure/functions');\n\n// Handler returns the content for the MCP resource when a client reads it.\nasync function mcpResourceHello(_resourceContext, context) {\n    context.log('MCP Resource trigger function processed a request.');\n    return 'Hello from MCP Resource!';\n}\n\n// Register a file-style MCP resource clients can discover and read.\napp.mcpResource('mcpFileResource', {\n    uri: 'file://mcpFileResource.txt',\n    resourceName: 'mcpFileResource',\n    description: 'Simple MCP Resource that returns text content.',\n    mimeType: 'text/plain',\n    handler: mcpResourceHello\n});"
+        },
+        "metadata": {
+            "defaultFunctionName": "mcpResourceTrigger",
+            "description": "$McpResourceTrigger_description",
+            "name": "MCP Resource Trigger",
+            "language": "JavaScript",
+            "triggerType": "mcpResourceTrigger",
+            "category": [
+                "$temp_category_core",
+                "$temp_category_dataProcessing"
+            ],
+            "categoryStyle": "other",
+            "enabledInTryMode": false,
+            "userPrompt": []
+        }
+    },
+    {
+        "id": "McpResourceTrigger-TypeScript-4.x",
+        "runtime": "2",
+        "files": {
+            "%functionName%.ts": "import { app, InvocationContext } from \"@azure/functions\";\n\n// Handler returns the content for the MCP resource when a client reads it.\nexport async function mcpResourceHello(_resourceContext: unknown, context: InvocationContext): Promise<string> {\n    context.log('MCP Resource trigger function processed a request.');\n    return 'Hello from MCP Resource!';\n}\n\n// Register a file-style MCP resource clients can discover and read.\napp.mcpResource('mcpFileResource', {\n    uri: 'file://mcpFileResource.txt',\n    resourceName: 'mcpFileResource',\n    description: 'Simple MCP Resource that returns text content.',\n    mimeType: 'text/plain',\n    handler: mcpResourceHello\n});"
+        },
+        "metadata": {
+            "defaultFunctionName": "mcpResourceTrigger",
+            "description": "$McpResourceTrigger_description",
+            "name": "MCP Resource Trigger",
+            "language": "TypeScript",
+            "triggerType": "mcpResourceTrigger",
+            "category": [
+                "$temp_category_core",
+                "$temp_category_dataProcessing"
+            ],
+            "categoryStyle": "other",
+            "enabledInTryMode": false,
+            "userPrompt": []
+        }
     }
 ]

src/funcConfig/function.ts

@@ -39,15 +39,15 @@ export class ParsedFunctionJson {
 
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     public constructor(data: any) {
-         
+
         if (typeof data === 'object' && data !== null && (data.triggerType !== undefined)) {
             this.template = <IFunctionTemplate>data;
             this.data = {};
         }
-         
+
         else if (typeof data === 'object' && data !== null && (data.bindings === undefined || data.bindings instanceof Array)) {
             this.data = <IFunctionJson>data;
-             
+
         } else {
             this.data = {};
         }
@@ -85,10 +85,10 @@ export class ParsedFunctionJson {
 
     public get isMcpTrigger(): boolean {
         if (this.template?.triggerType) {
-            return /^mcptooltrigger/i.test(this.template.triggerType) || /^mcptrigger/i.test(this.template.triggerType);
+            return /^mcptooltrigger/i.test(this.template.triggerType) || /^mcptrigger/i.test(this.template.triggerType) || /^mcpresourcetrigger/i.test(this.template.triggerType);
         }
         if (this.triggerBinding && this.triggerBinding.type) {
-            return /^mcptooltrigger/i.test(this.triggerBinding.type) || /^mcptrigger/i.test(this.triggerBinding.type);
+            return /^mcptooltrigger/i.test(this.triggerBinding.type) || /^mcptrigger/i.test(this.triggerBinding.type) || /^mcpresourcetrigger/i.test(this.triggerBinding.type);
         }
 
         return false;

src/templates/script/getScriptVerifiedTemplateIds.ts

@@ -39,6 +39,7 @@ export function getScriptVerifiedTemplateIds(version: string): (string | RegExp)
             'EventGridBlobTrigger',
             'SqlTrigger',
             'McpToolTrigger',
+            'McpResourceTrigger',
             'MCPTrigger'
         ]);
 

src/templates/script/parseScriptTemplatesV2.ts

@@ -121,9 +121,10 @@ export function parseScriptTemplates(rawTemplates: RawTemplateV2[], rawBindings:
         }
         const isHttpTrigger = !!templateV2.id?.toLowerCase().includes('httptrigger-');
         const isTimerTrigger = !!templateV2.id?.toLowerCase().includes('timertrigger-');
-        // python and node.js use 2 different IDs for Mcp Triggers... because of course they do
+        // MCP trigger variants use multiple IDs across templates/providers.
         const isMcpTrigger = !!templateV2.id?.toLowerCase().includes('mcptooltrigger') ||
-            templateV2.id?.toLowerCase().includes('mcptrigger');
+            templateV2.id?.toLowerCase().includes('mcptrigger') ||
+            templateV2.id?.toLowerCase().includes('mcpresourcetrigger');
 
         templates.push(Object.assign(templateV2, {
             wizards: parsedJobs,

test/templateCount.test.ts

@@ -30,14 +30,14 @@ function addSuite(source: TemplateSource | undefined): void {
     suite(`Template Count - ${source === undefined ? 'defaultOnExtensionActivation' : source}`, () => {
         const cases: TestCase[] = [
             { language: ProjectLanguage.JavaScript, version: FuncVersion.v1, expectedCount: 8 },
-            { language: ProjectLanguage.JavaScript, version: FuncVersion.v4, expectedCount: 18 },
+            { language: ProjectLanguage.JavaScript, version: FuncVersion.v4, expectedCount: 18, backupExpectedCount: 18 },
             { language: ProjectLanguage.CSharp, version: FuncVersion.v1, expectedCount: 12 },
             { language: ProjectLanguage.CSharp, version: FuncVersion.v4, expectedCount: 15, projectTemplateKey: 'net6.0' },
             { language: ProjectLanguage.CSharp, version: FuncVersion.v4, expectedCount: 14, backupExpectedCount: 13, projectTemplateKey: 'net6.0-isolated' },
             { language: ProjectLanguage.CSharp, version: FuncVersion.v4, expectedCount: 14, backupExpectedCount: 13, projectTemplateKey: 'net7.0-isolated' },
             { language: ProjectLanguage.CSharp, version: FuncVersion.v4, expectedCount: 14, backupExpectedCount: 13, projectTemplateKey: 'net8.0-isolated' },
             { language: ProjectLanguage.Python, version: FuncVersion.v4, expectedCount: 15 },
-            { language: ProjectLanguage.TypeScript, version: FuncVersion.v4, expectedCount: 18 },
+            { language: ProjectLanguage.TypeScript, version: FuncVersion.v4, expectedCount: 18, backupExpectedCount: 18 },
             { language: ProjectLanguage.PowerShell, version: FuncVersion.v4, expectedCount: 16 },
             { language: ProjectLanguage.Ballerina, version: FuncVersion.v4, expectedCount: 5 }
         ];