Add GitLab Sign-In to Your App

"use client"

import { useState } from 'react'

export default function LoginPage() {
  const [isLoading, setIsLoading] = useState(false)

  const handleGitLabSignIn = async () => {
    setIsLoading(true)

    // Call OAuth42's social auth init endpoint
    const response = await fetch('/api/auth/social/gitlab', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        provider: 'gitlab',
        client_id: process.env.NEXT_PUBLIC_OAUTH42_CLIENT_ID,
        is_signup: true, // Allow account creation
      }),
    })

    const data = await response.json()

    if (data.authorization_url) {
      // Redirect to GitLab
      window.location.href = data.authorization_url
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-100">
      <div className="max-w-md w-full space-y-6 p-8 bg-white rounded-lg shadow">
        <h1 className="text-2xl font-bold text-center">Sign In</h1>

        <button
          onClick={handleGitLabSignIn}
          disabled={isLoading}
          className="w-full flex items-center justify-center gap-3 py-3 px-4 bg-[#FC6D26] text-white rounded-lg hover:bg-[#E24329] transition-colors"
        >
          <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 24 24">
            <path d="M4.845.904c-.435 0-.82.28-.955.692C2.639 5.449 1.246 9.728.07 13.335a1.437 1.437 0 00.522 1.607l11.071 8.045c.2.145.472.144.67-.004l11.073-8.04a1.436 1.436 0 00.522-1.61c-1.285-3.942-2.683-8.256-3.817-11.746a1.004 1.004 0 00-.957-.684.987.987 0 00-.949.69l-2.405 7.408H8.203l-2.41-7.408a.987.987 0 00-.942-.69h-.006z"/>
          </svg>
          {isLoading ? 'Redirecting...' : 'Continue with GitLab'}
        </button>

        <div className="relative">
          <div className="absolute inset-0 flex items-center">
            <div className="w-full border-t border-gray-300" />
          </div>
          <div className="relative flex justify-center text-sm">
            <span className="px-2 bg-white text-gray-500">or</span>
          </div>
        </div>

        {/* Your regular email/password login form */}
        <form className="space-y-4">
          <input
            type="email"
            placeholder="Email"
            className="w-full px-4 py-3 border border-gray-300 rounded-lg"
          />
          <input
            type="password"
            placeholder="Password"
            className="w-full px-4 py-3 border border-gray-300 rounded-lg"
          />
          <button
            type="submit"
            className="w-full py-3 px-4 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700"
          >
            Sign In
          </button>
        </form>
      </div>
    </div>
  )
}

mkdir -p app/api/auth/social/gitlab
touch app/api/auth/social/gitlab/route.ts

import { NextRequest, NextResponse } from 'next/server'

const API_BASE_URL = process.env.OAUTH42_ISSUER || 'https://api.oauth42.com'

export async function POST(request: NextRequest) {
  try {
    const body = await request.json()

    const response = await fetch(`${API_BASE_URL}/api/social-auth/init`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        provider: 'gitlab',
        client_id: body.client_id,
        is_signup: body.is_signup || true,
        state: body.state,
      }),
    })

    const data = await response.json()

    if (!response.ok) {
      return NextResponse.json(data, { status: response.status })
    }

    return NextResponse.json(data)
  } catch (error) {
    console.error('[Social Auth] Error:', error)
    return NextResponse.json(
      { error: 'Failed to initiate social auth' },
      { status: 500 }
    )
  }
}