feat: implement user signup functionality with session management

src/app.d.ts

@@ -3,7 +3,11 @@
 declare global {
 	namespace App {
 		// interface Error {}
-		// interface Locals {}
+		interface Locals {
+			session: {
+				token: string;
+			} | null;
+		}
 		// interface PageData {}
 		// interface PageState {}
 		// interface Platform {}

src/hooks.server.ts

@@ -0,0 +1,24 @@
+import { db } from "$lib/server/db";
+import { sessionTable } from "$lib/server/db/schema";
+import type { Handle } from "@sveltejs/kit";
+import { createHash } from "crypto";
+import { and, eq, gt } from "drizzle-orm";
+
+export const handle: Handle = async ({ event, resolve }) => {
+    event.locals.session = null;
+
+    const rawToken = event.cookies.get("session");
+    if (rawToken) {
+        const hashedToken = createHash("sha256").update(rawToken).digest("hex");
+        const [sessionRecord] = await db
+            .select()
+            .from(sessionTable)
+            .where(and(eq(sessionTable.token, hashedToken), gt(sessionTable.expires_at, new Date())));
+
+        if (sessionRecord) {
+            event.locals.session = { token: sessionRecord.token };
+        }
+    }
+
+    return await resolve(event);
+};

src/lib/server/db/schema.ts

@@ -1,6 +1,17 @@
-import { pgTable, serial, integer } from 'drizzle-orm/pg-core';
+import { pgTable, serial, text, timestamp } from 'drizzle-orm/pg-core';
 
-export const user = pgTable('user', {
+export const userTable = pgTable('user', {
 	id: serial('id').primaryKey(),
-	age: integer('age')
+	name: text('name').notNull(),
+	email: text('email').notNull().unique(),
+	password: text('password').notNull(),
+	created_at: timestamp('created_at').defaultNow()
+});
+
+export const sessionTable = pgTable('session', {
+	id: serial('id').primaryKey(),
+	user_id: serial('user_id').notNull().references(() => userTable.id),
+	token: text('token').notNull().unique(),
+	expires_at: timestamp('expires_at').notNull(),
+	created_at: timestamp('created_at').defaultNow()
 });

src/routes/signup/+page.server.ts

@@ -0,0 +1,22 @@
+import { db } from '$lib/server/db';
+import { userTable } from '$lib/server/db/schema';
+import type { Actions } from './$types';
+
+export const actions = {
+	default: async ({ request }) => {
+		const formData = await request.formData();
+        const name = formData.get('name');
+        const email = formData.get('email');
+		const password = formData.get('password');
+
+        // TODO: Implement data validation.
+
+        const userRecord = await db.insert(userTable).values({
+            name: name as string,
+            email: email as string,
+            password: password as string
+        }).returning();
+
+        // TODO: Handle post-signup logic (e.g., redirect, session creation).
+	}
+} satisfies Actions;

src/routes/signup/+page.svelte

@@ -0,0 +1,6 @@
+<form method="post">
+    <input type="text" name="name" placeholder="Name" required />
+    <input type="email" name="email" placeholder="Email" required />
+    <input type="password" name="password" placeholder="Password" required />
+    <button type="submit">Sign Up</button>
+</form>