sending notification when new items arrive with send grid

backend/utils/sendnotification.js

@@ -0,0 +1,33 @@
+const scrapTheItems = require("./scraptheitems");
+const convertToDate = require("./convertToDate");
+const sgMail = require("@sendgrid/mail");
+// should be process.env.SENDGRID_API_KEY
+sgMail.setApiKey(
+  "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"
+);
+
+async function sendNotification(marketAlert) {
+  const { id, email, olx_url, last_date } = marketAlert;
+  let url =
+    "https://www.olx.ba/pretraga?" + olx_url + "&sort_order=desc&sort_po=datum";
+  let newItems = await scrapTheItems(url);
+  let lastDate = newItems.length && newItems[0].date;
+  let message =
+    newItems.length &&
+    newItems.reduce(
+      (mes, item) => mes + `<strong>${item.url} i  ${item.price}</strong>`,
+      ""
+    );
+  const msg = {
+    to: email,
+    from: "test@example.com",
+    subject: "Market Alert",
+    text: "New items on olx",
+    html: message
+  };
+  if (message) {
+    await sgMail.send(msg);
+    return { id, date: String(convertToDate(lastDate)) };
+  }
+}
+module.exports = sendNotification;