Implement authentication

src/middleware.ts

@@ -0,0 +1,22 @@
+import { defineMiddleware } from 'astro:middleware'
+import { setSessionTokenCookie, deleteSessionTokenCookie, validateSessionToken, COOKIE_NAME } from 'utils/session'
+
+export const onRequest = defineMiddleware(async (context, next) => {
+  const token = context.cookies.get(COOKIE_NAME)?.value
+  if (!token) {
+    context.locals.user = null
+    context.locals.session = null
+    return next()
+  }
+
+  const { session, user } = await validateSessionToken(token)
+  if (session !== null) {
+    setSessionTokenCookie(context.cookies, token, session.expiresAt)
+  } else {
+    deleteSessionTokenCookie(context.cookies)
+  }
+
+  context.locals.session = session
+  context.locals.user = user
+  return next()
+})