From 47ff5170acfb13dc33a6c1cafcd5b59577e0e226 Mon Sep 17 00:00:00 2001
From: Azalea <22280294+hykilpikonna@users.noreply.github.com>
Date: Fri, 24 Nov 2023 12:28:32 -0500
Subject: [PATCH] [+] SDK

---
 frontend/src/logic/sdk.ts | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 frontend/src/logic/sdk.ts

diff --git a/frontend/src/logic/sdk.ts b/frontend/src/logic/sdk.ts
new file mode 100644
index 0000000..dfaf8eb
--- /dev/null
+++ b/frontend/src/logic/sdk.ts
@@ -0,0 +1,35 @@
+
+// db.users: Signup table map<username, password>
+// db.user: Current logged-in user
+const db = localStorage
+
+export function signup(username: string, password: string)
+{
+  if (!db.users)
+    db.users = JSON.stringify({})
+
+  const users = JSON.parse(db.users)
+  if (users[username])
+    throw new Error('User already exists')
+
+  users[username] = password
+}
+
+export function login(username: string, password: string)
+{
+  const users = JSON.parse(db.users)
+  if (users[username] !== password)
+    throw new Error('Invalid credentials')
+
+  db.user = username
+}
+
+export function logout()
+{
+  delete db.user
+}
+
+export function isLoggedIn()
+{
+  return !!db.user
+}