db

src/db.ts

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+import { DB } from '@/types/db';
+import { createPool } from 'mysql2';
+import { Generated, Kysely, MysqlDialect } from 'kysely';
+
+const createDb = () => {
+	if ((globalThis as any).db)
+		return (globalThis as any).db as Kysely<GeneratedDB>;
+
+	const dialect = new MysqlDialect({
+		pool: createPool(process.env.DATABASE_URL as string)
+	});
+
+	if (process.env.NODE_ENV === 'production')
+		delete process.env.DATABASE_URL;
+
+	return (globalThis as any).db = new Kysely<GeneratedDB>({ dialect });
+}
+
+
+type IdGenerated<C, T> = C extends 'id' ? Generated<T> : T;
+
+// mark all id fields as generated
+export type GeneratedDB = {
+	[Table in keyof DB]: {
+		[Column in keyof DB[Table]]: IdGenerated<Column, DB[Table][Column]>
+	}
+};
+
+export const db = createDb();

src/types/deep-is/index.ts

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+declare module 'deep-is' {
+	export default function (a: any, b: any): boolean;
+}

src/types/next-auth/index.d.ts

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+import NextAuth from 'next-auth';
+import { UserPayload } from '@/types/user';
+
+declare module 'next-auth' {
+	interface Session {
+		user: {
+			[T in keyof UserPayload]: UserPayload[T]
+		},
+	}
+
+	interface JWT {
+		user: {
+			[T in keyof UserPayload]: UserPayload[T]
+		}
+	}
+}

src/types/user.ts

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+import { AimeUser } from '@/types/db';
+
+export type DBUserPayload = Omit<AimeUser, 'password'> & {
+	chuni: boolean
+};
+
+export type UserPayload = {
+	[T in keyof DBUserPayload]: DBUserPayload[T] extends (Date | null) ? (string | null) :
+		DBUserPayload[T]
+} & {
+	iat: number,
+	exp: number,
+};