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',
+    },
+  },
+};