Add auto-rescheduler and error handlers

Signed-off-by: adithyagenie <adithyagenie@gmail.com>

src/api/lcFetch.ts

@@ -35,7 +35,8 @@ export async function fetchLCContests() {
 		contestNames.sort();
 		return contestNames;
 	} else {
-		throw new Error("Can't access LeetCode API :(");
+		throw new Error(`Can't access LeetCode API :(
+Error: ${resp.status} - ${resp.statusText}`);
 	}
 }
 

src/helpers/cfSchedule.ts

@@ -4,6 +4,7 @@ import { reminderContestCF } from "../bot/commands/contestRem";
 
 
 export async function cfSchedule() {
+	try {
 		const contests = await cfFetchContests();
 		if (contests.length === 0) {
 			console.log("No codeforces contests found!");
@@ -16,3 +17,8 @@ export async function cfSchedule() {
 		}
 		console.log("Codeforces contests scheduled!");
 	}
+	catch (e) {
+		console.error("Unable to fetch CodeForces API :(");
+		setTimeout(cfSchedule, 3000);
+	}
+}

src/helpers/lcSchedule.ts

@@ -19,7 +19,15 @@ function getNextBiweeklyDate(): Date {
 
 
 export async function lcSchedule() {
-	const contestNames = await fetchLCContests();
+	let contestNames: {key: string, name: string}[];
+	try {
+		contestNames = await fetchLCContests();
+	}
+	catch {
+		console.error(`Unable to fetch LeetCode API :(`);
+		setTimeout(lcSchedule, 2000);
+		return;
+	}
 	const biweekly = contestNames.filter(o =>
 		o.key.match(/^biweekly-contest-(\d+)$/)
 	);

src/helpers/scheduler.ts

@@ -1,11 +1,20 @@
 import { lcSchedule } from "./lcSchedule";
 import { ccSchedule } from "./ccSchedule";
 import { cfSchedule } from "./cfSchedule";
-import { gracefulShutdown } from "node-schedule";
+import { gracefulShutdown, RecurrenceRule, scheduleJob } from "node-schedule";
 
 export async function contestScheduler() {
 	await gracefulShutdown();
 	await lcSchedule();
 	ccSchedule();
 	await cfSchedule();
+	console.log("Contests rescheduled!")
+}
+
+export async function renewScheduler() {
+	const rule = new RecurrenceRule();
+	rule.tz = "Etc/UTC";
+	rule.hour = 0;
+	rule.minute = 0;
+	scheduleJob(rule, contestScheduler);
 }

src/index.ts

@@ -5,7 +5,7 @@ config();
 import { FastifyInstance } from "fastify";
 import { startserver } from "./api/server";
 import { botInit } from "./bot/bot";
-import { contestScheduler } from "./helpers/scheduler";
+import { contestScheduler, renewScheduler } from "./helpers/scheduler";
 
 if (process.env.BOT_TOKEN === undefined ||
 	process.env.RUN_METHOD === undefined ||
@@ -23,4 +23,5 @@ startserver().then((s) => {
 	server = s;
 });
 contestScheduler().catch(e => console.error(e));
+renewScheduler().catch(e => console.error(e));
 botInit().catch(e => console.error(e));