feat: add password gate

app/api/verify-access/route.ts

@@ -0,0 +1,45 @@
+import { NextResponse } from "next/server";
+
+/**
+ * GET /api/verify-access
+ *
+ * Returns whether password protection is enabled at runtime.
+ * This is called by the PasswordGate client component on mount
+ * to determine if it should show the password prompt.
+ */
+export async function GET() {
+  const accessKey = process.env.ACCESS_KEY;
+  const enabled = !!accessKey;
+  return NextResponse.json({ enabled });
+}
+
+/**
+ * POST /api/verify-access
+ *
+ * Validates a submitted key against the ACCESS_KEY environment variable.
+ * Returns { valid: true } if matched, { valid: false } otherwise.
+ *
+ * If ACCESS_KEY is not set, all keys are rejected (locked by default).
+ */
+export async function POST(request: Request) {
+  try {
+    const body = await request.json();
+    const submitted = body?.key;
+
+    if (typeof submitted !== "string" || !submitted) {
+      return NextResponse.json({ valid: false }, { status: 400 });
+    }
+
+    const accessKey = process.env.ACCESS_KEY;
+
+    // If no ACCESS_KEY is configured, reject everything
+    if (!accessKey) {
+      return NextResponse.json({ valid: false }, { status: 403 });
+    }
+
+    const valid = submitted === accessKey;
+    return NextResponse.json({ valid }, { status: valid ? 200 : 401 });
+  } catch {
+    return NextResponse.json({ valid: false }, { status: 400 });
+  }
+}

app/layout.tsx

@@ -2,6 +2,7 @@ import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import { ThemeProvider } from "@/components/theme-provider";
 import { TooltipProvider } from "@/components/ui/tooltip";
+import { PasswordGate } from "@/components/password-gate";
 import "./globals.css";
 
 const geistSans = Geist({
@@ -38,7 +39,9 @@ export default function RootLayout({
           enableSystem
           disableTransitionOnChange
         >
-          <TooltipProvider>{children}</TooltipProvider>
+          <TooltipProvider>
+            <PasswordGate>{children}</PasswordGate>
+          </TooltipProvider>
         </ThemeProvider>
       </body>
     </html>

components/password-gate.tsx

@@ -0,0 +1,157 @@
+"use client";
+
+import { useState, useEffect, type ReactNode } from "react";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+
+/**
+ * PasswordGate — a simple client-side password protection layer.
+ *
+ * How it works:
+ *   1. On mount, asks the server (GET /api/verify-access) whether protection is enabled.
+ *   2. If not enabled, renders children immediately (no gate).
+ *   3. If enabled, checks sessionStorage for a stored access key.
+ *   4. If found, validates it against the server via POST /api/verify-access.
+ *   5. If not found or invalid, shows a password prompt.
+ *   6. On correct password, stores it in sessionStorage and renders children.
+ *
+ * Environment:
+ *   - ACCESS_KEY env variable must be set on the server for protection to activate.
+ *   - If ACCESS_KEY is not set, the gate is bypassed entirely.
+ *
+ * This is intentionally simple and modular — remove the <PasswordGate> wrapper
+ * from layout.tsx to disable it entirely.
+ */
+
+const SESSION_KEY = "spsays_access";
+const API_ENDPOINT = "/api/verify-access";
+
+export function PasswordGate({ children }: { children: ReactNode }) {
+  const [status, setStatus] = useState<"loading" | "locked" | "unlocked">(
+    "loading",
+  );
+  const [password, setPassword] = useState("");
+  const [error, setError] = useState("");
+  const [verifying, setVerifying] = useState(false);
+
+  async function verifyKey(key: string): Promise<boolean> {
+    try {
+      const res = await fetch(API_ENDPOINT, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ key }),
+      });
+      if (!res.ok) return false;
+      const data = await res.json();
+      return data.valid === true;
+    } catch {
+      return false;
+    }
+  }
+
+  useEffect(() => {
+    async function init() {
+      // Step 1: Ask server if protection is enabled
+      try {
+        const res = await fetch(API_ENDPOINT);
+        const data = await res.json();
+
+        if (!data.enabled) {
+          // No ACCESS_KEY set on server — bypass gate
+          setStatus("unlocked");
+          return;
+        }
+      } catch {
+        // If we can't reach the server, unlock to avoid blocking the site
+        setStatus("unlocked");
+        return;
+      }
+
+      // Step 2: Protection is enabled — check sessionStorage
+      const stored = sessionStorage.getItem(SESSION_KEY);
+      if (stored) {
+        const ok = await verifyKey(stored);
+        if (ok) {
+          setStatus("unlocked");
+          return;
+        }
+        // Stored key is invalid — clear it
+        sessionStorage.removeItem(SESSION_KEY);
+      }
+
+      setStatus("locked");
+    }
+
+    init();
+  }, []);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!password.trim()) return;
+
+    setVerifying(true);
+    setError("");
+
+    const ok = await verifyKey(password.trim());
+    if (ok) {
+      sessionStorage.setItem(SESSION_KEY, password.trim());
+      setStatus("unlocked");
+    } else {
+      setError("Invalid access key. Please try again.");
+    }
+    setVerifying(false);
+  }
+
+  // Loading state — brief flash while checking with server
+  if (status === "loading") {
+    return (
+      <div className="min-h-screen bg-background flex items-center justify-center">
+        <div className="text-muted-foreground text-sm">Loading…</div>
+      </div>
+    );
+  }
+
+  // Unlocked — render the app
+  if (status === "unlocked") {
+    return <>{children}</>;
+  }
+
+  // Locked — show password prompt
+  return (
+    <div className="min-h-screen bg-background flex items-center justify-center px-4">
+      <Card className="w-full max-w-sm">
+        <CardHeader className="text-center">
+          <CardTitle className="text-2xl font-bold">Prabhupāda Says</CardTitle>
+          <p className="text-sm text-muted-foreground mt-1">
+            Enter the access key to continue
+          </p>
+        </CardHeader>
+        <CardContent>
+          <form onSubmit={handleSubmit} className="space-y-4">
+            <Input
+              type="password"
+              placeholder="Access key"
+              value={password}
+              onChange={(e) => {
+                setPassword(e.target.value);
+                if (error) setError("");
+              }}
+              autoFocus
+              disabled={verifying}
+            />
+            {error && (
+              <p className="text-sm text-destructive text-center">{error}</p>
+            )}
+            <button
+              type="submit"
+              disabled={verifying || !password.trim()}
+              className="w-full rounded-md bg-primary px-4 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {verifying ? "Verifying…" : "Enter"}
+            </button>
+          </form>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}