fix: already logged in (#77)

* fix: already logged in

* format fix and test add

cli/auth/login/register.ts

@@ -1,12 +1,20 @@
 import type { Command } from "commander"
-import { setSessionToken } from "lib/cli-config"
+import { setSessionToken, getSessionToken } from "lib/cli-config"
 import delay from "delay"
 import { getKy } from "lib/registry-api/get-ky"
 import type { EndpointResponse } from "lib/registry-api/endpoint-types"
 
 export const registerAuthLogin = (program: Command) => {
   // Define the login action once to share between both commands
   const loginAction = async () => {
+    const sessionToken = getSessionToken()
+    if (sessionToken) {
+      console.log(
+        "Already logged in! Use 'tsci logout' if you need to switch accounts.",
+      )
+      return
+    }
+
     const ky = getKy()
 
     const { login_page } = await ky

lib/cli-config/index.ts

@@ -12,6 +12,10 @@ export const cliConfig: TypedConfigstore<CliConfig> = new Configstore(
   "tscircuit",
 )
 
+export const getSessionToken = (): string | undefined => {
+  return cliConfig.get("sessionToken")
+}
+
 export const setSessionToken = (token: string) => {
   cliConfig.set("sessionToken", token)
   const decoded = jwtDecode<{

tests/cli/auth/login.test.ts

@@ -0,0 +1,23 @@
+import { expect, test } from "bun:test"
+import { setSessionToken } from "lib/cli-config"
+import { getCliTestFixture } from "../../fixtures/get-cli-test-fixture"
+
+// A dummy valid JWT token (header.payload.signature)
+const dummyJwtToken =
+  "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9." +
+  "eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ." +
+  "SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
+
+test("login command: already logged in", async () => {
+  const { runCommand } = await getCliTestFixture()
+
+  // Simulate an already logged in state by setting a session token.
+  setSessionToken(dummyJwtToken)
+
+  const { stdout, stderr } = await runCommand("tsci login")
+
+  expect(stderr).toBe("")
+  expect(stdout).toContain(
+    "Already logged in! Use 'tsci logout' if you need to switch accounts.",
+  )
+})