Rewrite to TypeScript

Author: JiriLojda

functions/kontent_webhook_generic.js

@@ -0,0 +1,56 @@
+import { DeliveryClient } from '@kontent-ai/delivery-sdk';
+import { signatureHelper } from '@kontent-ai/webhook-helper';
+import { Handler } from "@netlify/functions";
+import {
+  IWebhookDeliveryData,
+  IWebhookResponse
+} from "@kontent-ai/webhook-helper/dist/cjs/models/webhook-models.class.ts";
+
+const CONFIG_DELIMITER = ",";
+
+export const handler: Handler = async (event) => {
+
+  // Only receiving POST requests
+  if (event.httpMethod !== "POST") {
+    return { statusCode: 405, body: "Method Not Allowed" };
+  }
+
+  if (!event.body) {
+    return { statusCode: 400, body: "Missing body" };
+  }
+
+  // Consistency check - make sure your netlify enrionment variable and your webhook secret matches
+  if (!signatureHelper.isValidSignatureFromString(event.body, process.env.KONTENT_SECRET ?? '', event.headers['x-kc-signature'] ?? '')) {
+    return { statusCode: 401, body: "Unauthorized" };
+  }
+
+  const jsonBody: IWebhookResponse<IWebhookDeliveryData> = JSON.parse(event.body);
+  const webhookMessage = jsonBody.message;
+  const webhookData = jsonBody.data;
+
+  // extracting projectId, operation & type from a webhook message
+  const projectId = webhookMessage.project_id;
+  const operation = webhookMessage.operation;
+  const type = webhookMessage.type;
+
+  // loading allowed operations and types from config
+  const allowedOperations = process.env.ALLOWED_OPERATIONS?.split(CONFIG_DELIMITER) ?? [];
+  const allowedTypes = process.env.ALLOWED_TYPES?.split(CONFIG_DELIMITER) ?? [];
+
+  // if the method or type is not allowed abort
+  if (projectId && allowedOperations.includes(operation) && allowedTypes.includes(type)) {
+    return { statusCode: 200, body: '[]' };
+  }
+
+  // download the affected items
+  const deliveryClient = new DeliveryClient({ projectId });
+  const response = await Promise.all(webhookData.items.map(item => deliveryClient.item(item.codename).languageParameter(item.language).toPromise()));
+
+  // print the affected content items into function log
+  console.log(JSON.stringify(response));
+
+  return {
+    statusCode: 200,
+    body: `${JSON.stringify(response)}`,
+  };
+};

functions/kontent_webhook_generic.ts

@@ -4,7 +4,8 @@
   "description": "",
   "dependencies": {
     "@kontent-ai/delivery-sdk": "^12.1.0",
-    "@kontent-ai/webhook-helper": "^2.0.1"
+    "@kontent-ai/webhook-helper": "^2.0.1",
+    "@netlify/functions": "^1.2.0"
   },
   "repository": {
     "type": "git",
@@ -15,5 +16,8 @@
   "bugs": {
     "url": "https://github.com/kontent-ai/netlify-webhook-processor/issues"
   },
-  "homepage": "https://github.com/kontent-ai/netlify-webhook-processor#readme"
+  "homepage": "https://github.com/kontent-ai/netlify-webhook-processor#readme",
+  "devDependencies": {
+    "@types/node": "^18.7.17"
+  }
 }

package-lock.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "lib": [
+      "dom",
+      "esnext"
+    ],
+    "types": [
+      "node"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "noFallthroughCasesInSwitch": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true
+  },
+  "include": [
+    "src"
+  ]
+}