Merge pull request #81 from nashvillefcc/meetup_api_for_events#24

Meetup api for events#24

.gitignore

@@ -67,3 +67,6 @@ yarn-error.log
 .pnp.js
 # Yarn Integrity file
 .yarn-integrity
+
+# Local Netlify folder
+.netlify

netlify/functions/pingEvents/pingEvents.js

@@ -0,0 +1,63 @@
+const fetch = require('node-fetch');
+var faunadb = require('faunadb'),
+  q = faunadb.query;
+var client = new faunadb.Client({
+  secret: 'fnAEMbG7V8ACBCYzAGMmFrbunudXm4WMofc2WMMy',
+});
+
+var collection_reference = '301610187038392838'; // a reference to the specific collection that contains the cached events data
+
+const handler = async function () {
+  try {
+    const cache_is_expired = await client
+      .query(q.Get(q.Collection('Events'))) // query the events collection to grab the timestamp of the last time it was changed
+      .then(function (response) {
+        const eight_hours = 28800000; // 8 hours is the expiration time
+        const today = Date.now();
+
+        let lastCachedDate = new Date(response.ts / 1000); // take the timestamp and convert it to milliseconds (from microseconds which is faunaDB default)
+
+        let now = new Date(today);
+        let difference = now - lastCachedDate; // take the difference between today and the last timestamp
+
+        return difference >= eight_hours; // return whether or not the timestamp is expired
+      });
+
+    const response = cache_is_expired // if the cache_is_expired is true, then request fresh data from the api, store it and then return it
+      ? await fetch(
+          'https://api.rss2json.com/v1/api.json?rss_url=https%3A%2F%2Fwww.meetup.com%2FfreeCodeCamp-Nashville%2Fevents%2Frss',
+          {
+            headers: { Accept: 'application/json' },
+          }
+        )
+          .then(response => response.json())
+          .then(data => {
+            return client.query(
+              q.Replace(q.Ref(q.Collection('Events'), collection_reference), {
+                // replace the expired data
+                data: { events: data },
+              }),
+              q.Get(q.Ref(q.Collection('Events'), collection_reference)) // return the fresh data
+            );
+          })
+      : await client.query(
+          q.Get(q.Ref(q.Collection('Events'), collection_reference)) // if it is not expired, just query the database
+        );
+
+    let stringifiedData = JSON.stringify(response.data.events);
+    return {
+      statusCode: 200,
+      body: stringifiedData,
+    };
+  } catch (error) {
+    // output to netlify function log
+    console.log(error);
+    return {
+      statusCode: 500,
+      // Could be a custom message or object i.e. JSON.stringify(err)
+      body: JSON.stringify({ msg: error.message }),
+    };
+  }
+};
+
+module.exports = { handler };