Made it so, when using the batch code generator, it sends e-mails to everyone

src/pages/(admin)/BatchCodeGenerator.tsx

@@ -10,6 +10,7 @@ import {useFilePicker} from "use-file-picker";
 
 export default function BatchCodeGenerator() {
 	const [emails, setEmails] = useState<string[]>([]);
+	const [isLoading, setIsLoading] = useState(false);
 	const {openFilePicker, filesContent} = useFilePicker({
 		accept: ".txt",
 		multiple: false,
@@ -35,11 +36,12 @@ export default function BatchCodeGenerator() {
 		const uid = new ShortUniqueId();
 		const codes = emails.map(() => uid.randomUUID(6));
 
+		setIsLoading(true);
 		axios
-			.post("/api/code", {type, codes})
+			.post("/api/code", {type, codes, emails})
 			.then(({data, status}) => {
 				if (data.ok) {
-					toast.success(`Successfully generated ${capitalize(type)} codes!`, {toastId: "success"});
+					toast.success(`Successfully generated ${capitalize(type)} codes and they have been notified by e-mail!`, {toastId: "success"});
 					return;
 				}
 
@@ -54,25 +56,28 @@ export default function BatchCodeGenerator() {
 				}
 
 				toast.error(`Something went wrong, please try again later!`, {toastId: "error"});
-			});
+			})
+			.finally(() => setIsLoading(false));
 	};
 
 	return (
 		<div className="flex flex-col gap-4 border p-4 border-mti-gray-platinum rounded-xl">
 			<label className="font-normal text-base text-mti-gray-dim">Choose a .txt file containing e-mails</label>
-			<Button onClick={openFilePicker}>{filesContent.length > 0 ? filesContent[0].name : "Choose a file"}</Button>
+			<Button onClick={openFilePicker} isLoading={isLoading} disabled={isLoading}>
+				{filesContent.length > 0 ? filesContent[0].name : "Choose a file"}
+			</Button>
 			<label className="font-normal text-base text-mti-gray-dim">Select the type of user they should be</label>
 			<div className="grid grid-cols-2 gap-4">
-				<Button className="w-48" variant="outline" onClick={() => generateCode("student")} disabled={emails.length === 0}>
+				<Button className="w-48" variant="outline" onClick={() => generateCode("student")} disabled={emails.length === 0 || isLoading}>
 					Student
 				</Button>
-				<Button className="w-48" variant="outline" onClick={() => generateCode("teacher")} disabled={emails.length === 0}>
+				<Button className="w-48" variant="outline" onClick={() => generateCode("teacher")} disabled={emails.length === 0 || isLoading}>
 					Teacher
 				</Button>
-				<Button className="w-48" variant="outline" onClick={() => generateCode("admin")} disabled={emails.length === 0}>
+				<Button className="w-48" variant="outline" onClick={() => generateCode("admin")} disabled={emails.length === 0 || isLoading}>
 					Admin
 				</Button>
-				<Button className="w-48" variant="outline" onClick={() => generateCode("owner")} disabled={emails.length === 0}>
+				<Button className="w-48" variant="outline" onClick={() => generateCode("owner")} disabled={emails.length === 0 || isLoading}>
 					Owner
 				</Button>
 			</div>

src/pages/api/code.ts

@@ -7,6 +7,7 @@ import {sessionOptions} from "@/lib/session";
 import {Type} from "@/interfaces/user";
 import {PERMISSIONS} from "@/constants/userPermissions";
 import {uuidv4} from "@firebase/util";
+import {prepareMailer, prepareMailOptions} from "@/email";
 
 const db = getFirestore(app);
 
@@ -18,7 +19,7 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
 		return;
 	}
 
-	const {type, codes} = req.body as {type: Type; codes: string[]};
+	const {type, codes, emails} = req.body as {type: Type; codes: string[]; emails?: string[]};
 	const permission = PERMISSIONS.generateCode[type];
 
 	if (!permission.includes(req.session.user.type)) {
@@ -26,10 +27,27 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
 		return;
 	}
 
-	for (const code of codes) {
+	const codePromises = codes.map(async (code, index) => {
 		const codeRef = doc(db, "codes", uuidv4());
 		await setDoc(codeRef, {type, code});
-	}
 
-	res.status(200).json({ok: true});
+		if (emails && emails.length > index) {
+			const transport = prepareMailer();
+			const mailOptions = prepareMailOptions(
+				{
+					type,
+					code,
+				},
+				[emails[index]],
+				"EnCoach Registration",
+				"main",
+			);
+
+			await transport.sendMail(mailOptions);
+		}
+	});
+
+	Promise.all(codePromises).then(() => {
+		res.status(200).json({ok: true});
+	});
 }