Implement initializeEvents function in api.js

api.js

@@ -1,3 +1,5 @@
+import { writeFile } from "fs/promises";
+
 /**
  * Returns the details of a UFC event given its event ID and using the UFC API
  *
@@ -18,3 +20,58 @@ async function fetchEvent(eventId) {
     console.error(error);
   }
 }
+
+/**
+ * Using the UFC API, search for the latest event ID, then request each event
+ * preceding it until we reach an event that occurred 90 days before now.
+ * Finally, create events.json containing these events
+ *
+ * @returns {Promise<void>} - A Promise that resolves when events.json is created
+ */
+async function initializeEvents() {
+  // Binary search for the event with the highest valid event ID
+  let min = 1180;
+  let max = 2000; // Values should be updated when we reach UFC event ID 2000
+  let mid = Math.ceil((min + max) / 2);
+
+  console.log("Intializing events.json");
+  console.log("Finding latest event ID...");
+
+  try {
+    while (min < max) {
+      const event = await fetchEvent(mid);
+      if (event.LiveEventDetail.EventId) min = mid;
+      else max = mid - 1;
+      mid = Math.ceil((min + max) / 2);
+    }
+
+    console.log("Fetching recent and upcoming events:");
+
+    // Fetch all events starting from the latest event ID, moving backwards
+    // until we reach an event that occured 90 days before now
+    let eventId = mid;
+    let fetchedEvents = [];
+    let event;
+
+    do {
+      console.log("Event ID:", eventId);
+
+      event = await fetchEvent(eventId);
+
+      // Only filter in UFC events
+      if (event.LiveEventDetail.Organization.OrganizationId === 1)
+        fetchedEvents.push(event);
+
+      eventId--;
+    } while (
+      new Date(event.LiveEventDetail.StartTime) >
+      Date.now() - 1000 * 60 * 60 * 24 * 90
+    );
+
+    // Write the fetched events to events.json
+    fetchedEvents = JSON.stringify(fetchedEvents, null, 2);
+    writeFile("./events.json", fetchedEvents);
+  } catch (error) {
+    console.error(error);
+  }
+}