add cronJob to archive old files (#67)

solve this ticket: 

https://www.notion.so/smart-chain/8451b1abb95046ceae81b49cfe26fe71?v=ac57690f41144dd8b703ad8ce35b8f3f&p=aae880d89d5542af94affc637386a533&pm=s

src/entries/Cron.ts

@@ -7,7 +7,8 @@ import CronService from "@Services/common/CronService/CronService";
 (async () => {
 	try {
 		const variables = await Container.get(BackendVariables).validate();
-		if(variables.ENV === "stg"){
+		Container.get(CronService).archiveFiles();
+		if(variables.ENV !== "dev"){
 			Container.get(CronService).sendMails();
 		}
 	} catch (e) {

src/services/common/CronService/CronService.ts

@@ -1,14 +1,15 @@
 import { Service } from "typedi";
 import { CronJob } from "cron";
 import MailchimpService from "../MailchimpService/MailchimpService";
+import FilesService from "../FilesService/FilesService";
 
 
 @Service()
 export default class CronService {
-	constructor(private mailchimpService: MailchimpService) {}
+	constructor(private mailchimpService: MailchimpService, private filesService: FilesService) {}
 
 	public async sendMails() {
-		const cronJob = new CronJob("*/15 * * * * *", async () => {
+		const cronJob = new CronJob("*/15 * * * *", async () => { // Every 15 minutes
 			try {				
 				await this.mailchimpService.sendEmails();
 			} catch (e) {
@@ -21,4 +22,19 @@ export default class CronService {
 			cronJob.start();
 		}
 	}
+
+	public async archiveFiles() {
+		const cronJob = new CronJob("0 0 * * MON", async () => { // Every monday at midnight
+			try {				
+				await this.filesService.archiveOldFiles();
+			} catch (e) {
+				console.error(e);
+			}
+		});
+
+		// Start job
+		if (!cronJob.running) {
+			cronJob.start();
+		}
+	}
 }

src/services/common/FilesService/FilesService.ts

@@ -107,4 +107,32 @@ export default class FilesService extends BaseService {
 
 		return this.filesRepository.deleteKeyAndArchive(uid);
 	}
+
+	/**
+	 * @description : find files to be archived
+	 * @throws {Error} If file key cannot be deleted or archived
+	 */
+	public async getFilesToBeArchived() {
+		return this.filesRepository.findMany({
+			where: {
+				archived_at: null,
+				created_at: { lt: new Date(Date.now() - 1000 * 60 * 60 * 24 * 30 * 3) }, // 90 days
+			},
+		});
+	}
+
+	/**
+	 * @description : find files to be archived
+	 * @throws {Error} If file key cannot be deleted or archived
+	 */
+	public async archiveOldFiles() {
+		const files = await this.getFilesToBeArchived();
+		files.forEach(async (file) => {
+			try {
+				await this.deleteKeyAndArchive(file.uid);
+			} catch (error) {
+				console.error(error);
+			}
+		});
+	}
 }