first commit

auth/components/signin/action.ts

@@ -0,0 +1,47 @@
+"use server";
+
+import { cookies } from "next/headers";
+import { redirect } from "next/navigation";
+import { Argon2id } from "oslo/password";
+import { lucia } from "@/lib/lucia";
+import { lachesis } from "@/lib/prisma";
+
+const signIn = async (formData: FormData) => {
+  const formDataRaw = {
+    username: formData.get("username") as string,
+    password: formData.get("password") as string,
+  };
+
+  try {
+    const user = await lachesis.user.findUnique({
+      where: { username: formDataRaw.username },
+    });
+
+    if (!user) {
+      return { error: "Incorrect username" };
+    }
+
+    const validPassword = await new Argon2id().verify(
+      user.hashedPassword,
+      formDataRaw.password
+    );
+
+    if (!validPassword) {
+      return { error: "Incorrect password" };
+    }
+
+    const session = await lucia.createSession(user.id, {});
+    const sessionCookie = lucia.createSessionCookie(session.id);
+
+    cookies().set(
+      sessionCookie.name,
+      sessionCookie.value,
+      sessionCookie.attributes
+    );
+  } catch (error: any) {
+    return { error: "Sign-in failed: " + error.message };
+  }
+  redirect("/home");
+};
+
+export { signIn };