feat: add http adapter (#231)

* feat: add http adapter

lib/notification/adapter/http.js

@@ -0,0 +1,57 @@
+import { markdown2Html } from '../../services/markdown.js';
+
+const mapListing = (listing) => ({
+  address: listing.address,
+  description: listing.description,
+  id: listing.id,
+  imageUrl: listing.image,
+  price: listing.price,
+  size: listing.size,
+  title: listing.title,
+  url: listing.link,
+});
+
+export const send = ({ serviceName, newListings, notificationConfig, jobKey }) => {
+  const { authToken, endpointUrl } = notificationConfig.find((a) => a.id === config.id).fields;
+
+  const listings = newListings.map(mapListing);
+  const body = {
+    jobId: jobKey,
+    timestamp: new Date().toISOString(),
+    provider: serviceName,
+    listings,
+  };
+
+  const headers = {
+    'Content-Type': 'application/json',
+  };
+  if (authToken != null) {
+    headers['Authorization'] = `Bearer ${authToken}`;
+  }
+
+  return fetch(endpointUrl, {
+    method: 'POST',
+    headers: headers,
+    body: JSON.stringify(body),
+  });
+};
+
+export const config = {
+  id: 'http',
+  name: 'HTTP',
+  readme: markdown2Html('lib/notification/adapter/http.md'),
+  description: 'Fredy will send a generic HTTP POST request.',
+  fields: {
+    endpointUrl: {
+      description: "Your application's endpoint URL.",
+      label: 'Endpoint URL',
+      type: 'text',
+    },
+    authToken: {
+      description: "Your application's auth token, if required by your endpoint.",
+      label: 'Auth token (optional)',
+      optional: true,
+      type: 'text',
+    },
+  },
+};

lib/notification/adapter/http.md

@@ -0,0 +1,43 @@
+### HTTP Adapter
+
+This is a generic adapter for sending notifications via HTTP requests.
+You can leverage this adapter to integrate with various webhooks or APIs that accept HTTP requests. (e.g. Supabase
+Functions, a Node.js server, etc.)
+
+HTTP adapter supports a `authToken` field, which can be used to include an authorization token in the request headers.
+Your token would be included as a Bearer token in the `Authorization` header, which is a common method for securing API requests.
+
+Request Details:
+<details>
+Request Method: POST  
+
+Headers:
+
+```
+Content Type: `application/json`
+Authorization: Bearer {your-optional-auth-token}
+```
+
+Body:
+
+```json
+{
+  "jobId": "mg1waX4RHmIzL5NDYtYp-",
+  "provider": "immoscout",
+  "timestamp": "2024-06-15T12:34:56Z",
+  "listings": [
+    {
+      "address": "Str. 123, Bielefeld, Germany",
+      "description": "Möbliert: Einziehen & wohlfühlen: Neu möbliert.",
+      "id": "123456789",
+      "imageUrl": "https://<target-url>.com/listings/123456789.jpg",
+      "price": "1.240 €",
+      "size": "38 m²",
+      "title": "Schöne 1-Zimmer-Wohnung in Bielefeld",
+      "url": "https://<target-url>.com/listings/123456789"
+    }
+  ]
+}
+```
+
+</details>