metamask.php

<?php

namespace Appwrite\Auth;

class Metamask extends OAuth2
{
    /**
     * @return string
     */
    public function getName(): string
    {
        return 'metamask';
    }

    /**
     * For Metamask, there isn't a traditional login URL. Instead, you'll rely on client-side logic 
     * to trigger the Metamask popup. Return an empty string or perhaps some client-side URL to handle it.
     *
     * @return string
     */
    public function getLoginURL(): string
    {
        return '';
    }

    /**
     * In the case of Metamask, the "code" would be a signed message. We'd need the original 
     * message and the Ethereum address too, to verify.
     *
     * @param string $code
     * @return array
     */
    protected function getTokens(string $code): array
    {
        // Note: this is not how Metamask authentication really works. 
        // Just a mock implementation for the sake of this example.
        return [
            'access_token' => $code,  // Just return the signed message as an "access token"
            'expires_in' => 3600,    // Just a mock value.
        ];
    }

    // For the following methods, we're using mock implementations.
    // In a real-world scenario, you'd interact with the Ethereum blockchain or use a service.

    public function refreshTokens(string $refreshToken): array
    {
        return [
            'access_token' => $refreshToken,
            'expires_in' => 3600,
        ];
    }

    public function getUserID(string $accessToken): string
    {
        // Normally, with Metamask, the Ethereum address would act as a user ID.
        return '0x...';  // Mock Ethereum address
    }

    public function getUserEmail(string $accessToken): string
    {
        // Metamask doesn't provide emails. Return a mock or an empty string.
        return '';
    }

    public function isEmailVerified(string $accessToken): bool
    {
        // Metamask doesn't provide emails.
        return false;
    }

    public function getUserName(string $accessToken): string
    {
        // Metamask doesn't provide usernames. Return a mock or an empty string.
        return '';
    }
}