userType: external

gitBranch: main

type: user

role: user

content:
Search the codebase at /home/ccuser/the-50-dollar-app for:
1. Any signup page code that shows "already has account" or similar error messages - check src/app/auth/signup/ and related files
2. How the signup flow handles the case where an email is already registered
3. Any Supabase auth signup error handling

Read the relevant files and report back the exact code paths and error messages shown to users when they try to sign up with an existing email.


type: message

role: assistant

type: text

text: I'll search for signup page code and error handling related to existing email accounts.

service_tier: standard

type: assistant


slug: smooth-bouncing-ladybug

type: progress

hookEvent: PostToolUse

command: callback


content: No files found


Grep

pattern: already has account|already registered|email.*exist|already in use


text: Let me read the signup page and search for error handling patterns:


content:
1→"use client";
     2→import { useState } from "react";
     3→import { useRouter } from "next/navigation";
     4→import Link from "next/link";
     5→import { createClient } from "@/lib/supabase/client";
     6→import { initializeCSRF } from "@/lib/csrf-client";
     7→import { Button } from "@/components/ui/button";
     8→import { Input } from "@/components/ui/input";
     9→import { Label } from "@/components/ui/label";
    10→import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
    11→import { HardHat, Building2 } from "lucide-react";
    12→import type { UserType } from "@/lib/types";
    13→
    14→export default function SignupPage() {
    15→  const [email, setEmail] = useState("");
    16→  const [password, setPassword] = useState("");
    17→  const [userType, setUserType] = useState<UserType | null>(null);
    18→  const [agreedToTerms, setAgreedToTerms] = useState(false);
    19→  const [error, setError] = useState<string | null>(null);
    20→  const [loading, setLoading] = useState(false);
    21→  const router = useRouter();
    22→  const supabase = createClient();
    23→
    24→  async function handleSignup(e: React.FormEvent) {
    25→    e.preventDefault();
    26→    if (!userType) {
    27→      setError("Please select whether you're hiring or looking for work");
    28→      return;
    29→    }
    30→    if (!agreedToTerms) {
    31→      setError("Please agree to the Terms of Service and Privacy Policy");
    32→      return;
    33→    }
    34→
    35→    setLoading(true);
    36→    setError(null);
    37→
    38→    try {
    39→      const { data, error: signUpError } = await supabase.auth.signUp({
    40→        email,
    41→        password,
    42→        options: {
    43→          data: { type: userType },
    44→          emailRedirectTo: `${window.location.origin}/auth/callback`,
    45→        },
    46→      });
    47→
    48→      if (signUpError) {
    49→        setError(signUpError.message);
    50→        setLoading(false);
    51→        return;
    52→      }
    53→
    54→      // Supabase returns a fake user with no identities when email already exists
    55→      // (security measure to prevent email enumeration). Detect this and show a
    56→      // helpful message instead of silently redirecting to verify-email.
    57→      if (data.user && (!data.user.identities || data.user.identities.length === 0)) {
    58→        setError("An account with this email may already exist. Try signing in or resetting your password.");
    59→        setLoading(false);
    60→        return;
    61→      }
    62→
    63→      // If email is already confirmed (autoconfirm enabled), go straight to onboarding
    64→      if (data.user?.email_confirmed_at) {
    65→        await initializeCSRF();
    66→        const onboardingPath = userType === "contractor"
    67→          ? "/contractor/signup"
    68→          : "/worker/signup";
    69→        // Use window.location for a full-page navigation to avoid race conditions
    70→        // between router.push and middleware redirecting verified users off auth pages
    71→        window.location.href = onboardingPath;
    72→      } else {
    73→        // Email confirmation required — send to verify page
    74→        router.push("/auth/verify-email");
    75→      }
    76→    } catch (err: unknown) {
    77→      const message = err instanceof Error ? err.message : "Something went wrong. Please try again.";
    78→      setError(message);
    79→      setLoading(false);
    80→    }
    81→  }
    82→
    83→  return (
    84→

    85→      <Card className="w-full max-w-md">
    86→        <CardHeader className="text-center">
    87→          <CardTitle className="text-2xl font-bold">Create your account</CardTitle>
    88→          <CardDescription>
    89→            Sign up to find work or hire workers
    90→          </CardDescription>
    91→        </CardHeader>
    92→        <CardContent>
    93→          <form onSubmit={handleSignup} className="space-y-4">
    94→

    95→

    96→                Email
    97→                <Input
    98→                  id="email"
    99→                  type="email"
   100→                  value={email}
   101→                  onChange={(e) => setEmail(e.target.value)}
   102→                  required
   103→                  placeholder="you@example.com"
   104→                  className="h-12 text-base"
   105→                />
   106→

   107→

   108→                Password
   109→                <Input
   110→                  id="password"
   111→                  type="password"
   112→                  value={password}
   113→                  onChange={(e) => setPassword(e.target.value)}
   114→                  required
   115→                  placeholder="Create a password"
   116→                  minLength={8}
   117→                  className="h-12 text-base"
   118→                />
   119→

   120→

   121→
   122→

   123→              I am a...
   124→

   125→                <Button
   126→                  type="button"
   127→                  variant={userType === "contractor" ? "default" : "outline"}
   128→                  onClick={() => setUserType("contractor")}
   129→                  className="h-24 flex-col gap-2"
   130→                >
   131→                  <Building2 className="h-6 w-6" />
   132→                  Contractor
   133→                  Hiring workers
   134→                </Button>
   135→                <Button
   136→                  type="button"
   137→                  variant={userType === "worker" ? "default" : "outline"}
   138→                  onClick={() => setUserType("worker")}
   139→                  className="h-24 flex-col gap-2"
   140→                >
   141→                  <HardHat className="h-6 w-6" />
   142→                  Worker
   143→                  Looking for work
   144→                </Button>
   145→

   146→

   147→
   148→

   149→              <input
   150→                type="checkbox"
   151→                id="terms"
   152→                checked={agreedToTerms}
   153→                onChange={(e) => setAgreedToTerms(e.target.checked)}
   154→                className="mt-1 h-4 w-4 rounded border-border accent-primary"
   155→              />
   156→
   157→                I agree to the{" "}
   158→                <Link href="/legal/terms-of-service" className="text-primary underline hover:no-underline" target="_blank">
   159→                  Terms of Service
   160→                </Link>{" "}
   161→                and{" "}
   162→                <Link href="/legal/privacy-policy" className="text-primary underline hover:no-underline" target="_blank">
   163→                  Privacy Policy
   164→                </Link>
   165→
   166→

   167→
   168→            {error && (
   169→

   170→
{error}

   171→

   172→            )}
   173→
   174→            <Button type="submit" className="w-full h-12 text-base font-semibold" disabled={loading || !agreedToTerms}>
   175→              {loading ? "Creating account..." : "Create account"}
   176→            </Button>
   177→
   178→

   179→              Already have an account?{" "}
   180→              <Link href="/auth/login" className="text-primary underline hover:no-underline">
   181→                Sign in
   182→              </Link>
   183→

   184→          </form>
   185→        </CardContent>
   186→      </Card>
   187→

   188→  );
   189→}
   190→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


content:
Found 7 files
src/app/auth/signup/page.tsx
src/app/auth/reset-password/page.tsx
src/app/auth/login/page.tsx
src/app/auth/error.tsx
src/app/auth/verify-email/page.tsx
src/app/auth/callback/route.ts
src/app/auth/forgot-password/page.tsx


text: Let me also check the login page and error handling page for additional context:


content:
1→"use client";
     2→
     3→import { useState } from "react";
     4→import { useRouter } from "next/navigation";
     5→import Link from "next/link";
     6→import { createClient } from "@/lib/supabase/client";
     7→import { initializeCSRF } from "@/lib/csrf-client";
     8→import { Button } from "@/components/ui/button";
     9→import { Input } from "@/components/ui/input";
    10→import { Label } from "@/components/ui/label";
    11→import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
    12→
    13→export default function LoginPage() {
    14→  const [email, setEmail] = useState("");
    15→  const [password, setPassword] = useState("");
    16→  const [error, setError] = useState<string | null>(null);
    17→  const [loading, setLoading] = useState(false);
    18→  const router = useRouter();
    19→  const supabase = createClient();
    20→
    21→  async function handleLogin(e: React.FormEvent) {
    22→    e.preventDefault();
    23→    setLoading(true);
    24→    setError(null);
    25→
    26→    const { data, error } = await supabase.auth.signInWithPassword({
    27→      email,
    28→      password,
    29→    });
    30→
    31→    if (error) {
    32→      setError(error.message);
    33→      setLoading(false);
    34→      return;
    35→    }
    36→
    37→    // Check if email is verified before allowing dashboard access
    38→    if (data.user && !data.user.email_confirmed_at) {
    39→      router.push("/auth/verify-email");
    40→      return;
    41→    }
    42→
    43→    await initializeCSRF();
    44→
    45→    // Check if user has completed onboarding; if not, route to onboarding
    46→    const userType = data.user?.user_metadata?.type;
    47→    const { data: profile } = await supabase
    48→      .from("profiles")
    49→      .select("onboarding_completed")
    50→      .eq("id", data.user!.id)
    51→      .single();
    52→
    53→    let destination: string;
    54→    if (profile && !profile.onboarding_completed) {
    55→      destination = userType === "contractor"
    56→        ? "/contractor/signup"
    57→        : "/worker/signup";
    58→    } else {
    59→      destination = "/dashboard";
    60→    }
    61→    // Use window.location for a full-page navigation to avoid race conditions
    62→    // between router.push and middleware redirecting verified users off auth pages
    63→    window.location.href = destination;
    64→  }
    65→
    66→  return (
    67→

    68→      <Card className="w-full max-w-md">
    69→        <CardHeader className="text-center">
    70→          <CardTitle className="text-2xl font-bold">Welcome back</CardTitle>
    71→          <CardDescription>Sign in to your RateRight account</CardDescription>
    72→        </CardHeader>
    73→        <CardContent>
    74→          <form onSubmit={handleLogin} className="space-y-4">
    75→

    76→              Email
    77→              <Input
    78→                id="email"
    79→                type="email"
    80→                placeholder="you@example.com"
    81→                value={email}
    82→                onChange={(e) => setEmail(e.target.value)}
    83→                required
    84→                autoComplete="email"
    85→                className="h-12 text-base"
    86→              />
    87→

    88→

    89→              Password
    90→              <Input
    91→                id="password"
    92→                type="password"
    93→                placeholder="Your password"
    94→                value={password}
    95→                onChange={(e) => setPassword(e.target.value)}
    96→                required
    97→                autoComplete="current-password"
    98→                className="h-12 text-base"
    99→              />
   100→

   101→

   102→              <Link href="/auth/forgot-password" className="text-sm text-primary underline hover:no-underline">
   103→                Forgot password?
   104→              </Link>
   105→

   106→            {error && (
   107→

   108→
{error}

   109→

   110→            )}
   111→            <Button type="submit" className="w-full h-12 text-base font-semibold" disabled={loading}>
   112→              {loading ? "Signing in..." : "Sign in"}
   113→            </Button>
   114→          </form>
   115→

   116→            Don't have an account?{" "}
   117→            <Link href="/auth/signup" className="text-primary underline hover:no-underline">
   118→              Sign up
   119→            </Link>
   120→

   121→        </CardContent>
   122→      </Card>
   123→

   124→  );
   125→}
   126→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


content:
     1→'use client';
     2→
     3→import { useEffect } from 'react';
     4→import { logger } from '@/lib/logger';
     5→import { ErrorDisplay } from '@/components/error-display';
     6→
     7→export default function AuthError({
     8→  error,
     9→  reset,
    10→}: {
    11→  error: Error & { digest?: string };
    12→  reset: () => void;
    13→}) {
    14→  useEffect(() => {
    15→    logger.error('Auth error:', error);
    16→  }, [error]);
    17→
    18→  return (
    19→    <div className="min-h-screen bg-background flex items-center justify-center p-4">
    20→      <ErrorDisplay
    21→        title="Authentication error"
    22→        message="We ran into a problem. Please try signing in again."
    23→        error={error}
    24→        onRetry={reset}
    25→        onGoHome={() => window.location.href = '/auth/login'}
    26→      />
    27→    </div>
    28→  );
    29→}
    30→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


content:
Found 2 files
src/app/auth/signup/page.tsx
src/app/api/payments/create/route.ts


text: Perfect. Let me check the verify-email page for additional context:


content:
1→"use client";
     2→
     3→import { useState, useEffect } from "react";
     4→import { useRouter } from "next/navigation";
     5→import { createClient } from "@/lib/supabase/client";
     6→import { Button } from "@/components/ui/button";
     7→import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
     8→import { Mail, CheckCircle2, Clock } from "lucide-react";
     9→
    10→export default function VerifyEmailPage() {
    11→  const [emailSent, setEmailSent] = useState(false);
    12→  const [loading, setLoading] = useState(false);
    13→  const [error, setError] = useState<string | null>(null);
    14→  const router = useRouter();
    15→  const supabase = createClient();
    16→
    17→  useEffect(() => {
    18→    // Check if user is already logged in and email is verified
    19→    checkEmailStatus();
    20→  }, []);
    21→
    22→  async function checkEmailStatus() {
    23→    const { data: { user } } = await supabase.auth.getUser();
    24→
    25→    if (user?.email_confirmed_at) {
    26→      // Email is already verified, redirect to dashboard
    27→      router.push('/dashboard');
    28→    }
    29→  }
    30→
    31→  async function resendVerificationEmail() {
    32→    setLoading(true);
    33→    setError(null);
    34→
    35→    try {
    36→      const { data: { user } } = await supabase.auth.getUser();
    37→
    38→      if (!user) {
    39→        setError("No user found. Please log in again.");
    40→        setLoading(false);
    41→        return;
    42→      }
    43→
    44→      const { error } = await supabase.auth.resend({
    45→        type: 'signup',
    46→        email: user.email as string,
    47→      });
    48→
    49→      if (error) {
    50→        setError(error.message);
    51→      } else {
    52→        setEmailSent(true);
    53→      }
    54→    } catch (error) {
    55→      setError("Failed to resend verification email.");
    56→    } finally {
    57→      setLoading(false);
    58→    }
    59→  }
    60→
    61→  return (
    62→

    63→      <Card className="w-full max-w-md">
    64→        <CardHeader className="text-center">
    65→

    66→            <Mail className="h-6 w-6 text-primary" />
    67→

    68→          <CardTitle className="text-2xl font-bold">
    69→            Check your email
    70→          </CardTitle>
    71→          <CardDescription className="mt-2">
    72→            We've sent a verification email to your address. Please check your inbox and click the link to verify.
    73→          </CardDescription>
    74→        </CardHeader>
    75→        <CardContent className="space-y-4">
    76→

    77→

    78→              <Clock className="h-5 w-5 text-primary shrink-0 mt-0.5" />
    79→

    80→
Didn't receive the email?

    81→

    82→                  Check your spam folder or click the button below to resend.
    83→

    84→

    85→

    86→

    87→
    88→          {error && (
    89→

    90→
{error}

    91→

    92→          )}
    93→
    94→          {emailSent && (
    95→

    96→

    97→                <CheckCircle2 className="h-4 w-4 text-green-600 shrink-0" />
    98→

    99→                  Verification email resent. Please check your inbox.
   100→

   101→

   102→

   103→          )}
   104→
   105→

   106→            <Button
   107→              onClick={resendVerificationEmail}
   108→              disabled={loading || emailSent}
   109→              className="w-full h-12 text-base font-semibold"
   110→              variant="outline"
   111→            >
   112→              {loading ? "Sending..." : emailSent ? "Email sent" : "Resend verification email"}
   113→            </Button>
   114→
   115→            <Button
   116→              onClick={() => router.push('/auth/login')}
   117→              variant="ghost"
   118→              className="w-full h-12 text-base"
   119→            >
   120→              Back to login
   121→            </Button>
   122→

   123→        </CardContent>
   124→      </Card>
   125→

   126→  );
   127→}
   128→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>


content:
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-36-    setError(null);
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-37-
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-38-    try {
src/app/auth/signup/page.tsx:39:      const { data, error: signUpError } = await supabase.auth.signUp({
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-40-        email,
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-41-        password,
src/app/auth/signup/page.tsx-42-        options: {
--
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-51-        return;
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-52-      }
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-53-
src/app/auth/signup/page.tsx:54:      // Supabase returns a fake user with no identities when email already exists
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-55-      // (security measure to prevent email enumeration). Detect this and show a
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-56-      // helpful message instead of silently redirecting to verify-email.
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-57-      if (data.user && (!data.user.identities || data.user.identities.length === 0)) {
src/app/auth/signup/page.tsx:58:        setError("An account with this email may already exist. Try signing in or resetting your password.");
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-59-        setLoading(false);
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-60-        return;
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-61-      }
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-62-
src/app/auth/signup/page.tsx:63:      // If email is already confirmed (autoconfirm enabled), go straight to onboarding
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-64-      if (data.user?.email_confirmed_at) {
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-65-        await initializeCSRF();
/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx-66-        const onboardingPath = userType === "contractor"


text:
Perfect! I have all the information needed. Let me provide the comprehensive report.

## Signup Flow Error Handling Report

### Location
**File:** `/home/ccuser/the-50-dollar-app/src/app/auth/signup/page.tsx`

### How Existing Email Signup is Handled

The signup flow implements a sophisticated email enumeration prevention mechanism from Supabase. Here's how it works:

#### 1. **Main Signup Handler** (Lines 24-81)
The `handleSignup` function processes signup requests using the Supabase auth client:

```typescript
const { data, error: signUpError } = await supabase.auth.signUp({
  email,
  password,
  options: {
    data: { type: userType },
    emailRedirectTo: `${window.location.origin}/auth/callback`,
  },
});
```

#### 2. **Existing Email Detection** (Lines 54-61)
This is the critical piece that handles duplicate email attempts:

```typescript
// Supabase returns a fake user with no identities when email already exists
// (security measure to prevent email enumeration). Detect this and show a
// helpful message instead of silently redirecting to verify-email.
if (data.user && (!data.user.identities || data.user.identities.length === 0)) {
  setError("An account with this email may already exist. Try signing in or resetting your password.");
  setLoading(false);
  return;
}
```

**Key Points:**
- When a user tries to sign up with an email that already exists, Supabase **does NOT return an error**
- Instead, it returns a fake user object with an empty `identities` array
- This is a **security measure to prevent email enumeration attacks**
- The code detects this by checking if `data.user` exists but has no identities

#### 3. **Error Message Shown to User**
```
"An account with this email may already exist. Try signing in or resetting your password."
```

This message is displayed in a red error box at lines 168-172:
```typescript
{error && (
  <div className="rounded-lg bg-destructive/10 p-3">
    <p className="text-sm text-destructive font-medium">{error}</p>
  </div>
)}
```

#### 4. **Alternative Error Paths**
Two other error scenarios are handled:

**a) Direct API errors** (Lines 48-52):
```typescript
if (signUpError) {
  setError(signUpError.message);
  setLoading(false);
  return;
}
```

**b) Unexpected exceptions** (Lines 76-80):
```typescript
catch (err: unknown) {
  const message = err instanceof Error ? err.message : "Something went wrong. Please try again.";
  setError(message);
  setLoading(false);
}
```

### Related Auth Pages

**Login Page** (`/home/ccuser/the-50-dollar-app/src/app/auth/login/page.tsx`):
- Uses standard `signInWithPassword` and displays raw Supabase error messages
- Does not have special enumeration protection since it's an authentication endpoint

**Verify Email Page** (`/home/ccuser/the-50-dollar-app/src/app/auth/verify-email/page.tsx`):
- Handles email verification after signup
- Supports resending verification emails with error handling

### Summary

The signup flow implements best-practice security by:
1. Detecting when Supabase returns a "fake user" (email already exists)
2. Showing a user-friendly message that doesn't reveal whether an email is registered
3. Suggesting the user sign in or reset their password
4. Preventing email enumeration attacks that could reveal registered users

The exact error message users see is: **"An account with this email may already exist. Try signing in or resetting your password."**