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Edit File: controller.php

<?php
/**
 * Index_Now Module
 *
 * Main module class for handling instant indexing functionality.
 *
 * @package SureRank\Inc\Modules\Ai_Auth
 * @since 1.4.2
 */

namespace SureRank\Inc\Modules\Ai_Auth;

use SureRank\Inc\Traits\Get_Instance;
use WP;
use WP_Error;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Controller class
 *
 * Main module class for instant indexing functionality.
 */
class Controller {

use Get_Instance;

/**
	 * Module settings key.
	 *
	 * @since 1.4.2
	 * @var string
	 */
	public const SETTINGS_KEY = 'surerank_auth';

/**
	 * Encryption key.
	 *
	 * @since 1.4.2
	 * @var string
	 */
	public $key;

/**
	 * Get Auth URL.
	 *
	 * @since 1.4.2
	 * @return string|WP_Error
	 */
	public function get_auth_url() {
		// Generate a random key of 16 characters.
		$this->key = wp_generate_password( 16, false );

// Prepare the token data.
		$token_data = [
			'redirect-back' => admin_url( 'admin.php?page=surerank' ),
			'key'           => $this->key,
			'site-url'      => site_url(),
			'nonce'         => wp_create_nonce( 'surerank_ai_auth_nonce' ),
		];

$encoded_token_data = wp_json_encode( $token_data );

if ( empty( $encoded_token_data ) ) {
			return new WP_Error( 'failed_to_encode_token_data', __( 'Failed to encode the token data.', 'surerank' ) );
		}

return SURERANK_BILLING_PORTAL . 'auth/?token=' . base64_encode( $encoded_token_data );
	}

/**
	 * Get Auth status.
	 *
	 * @since 1.4.2
	 * @return bool
	 */
	public function get_auth_status() {
		$auth_status = get_option( self::SETTINGS_KEY, false );
		return ! empty( $auth_status );
	}

/**
	 * Save Auth.
	 *
	 * @since 1.4.2
	 * @param string $data Data to save.
	 * @param string $key Key to use for encryption.
	 * @param string $method Encryption method. Default is AES-256-CBC.
	 * @return bool|WP_Error
	 */
	public function save_auth( $data, $key, $method = 'AES-256-CBC' ) {

// Decode the data and split IV and encrypted data.
		$decoded_data = base64_decode( $data ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode

// if the data is not base64 encoded then return false.
		if ( empty( $decoded_data ) ) {
			return new WP_Error( 'failed_to_decode', __( 'Failed to decode the access key.', 'surerank' ) );
		}

// split the key and encrypted data.
		[$key, $encrypted] = explode( '::', $decoded_data, 2 );

// Decrypt the data using the key.
		$decrypted = openssl_decrypt( $encrypted, $method, $key, 0, $key );

// if the decryption returns false then send error.
		if ( empty( $decrypted ) ) {
			return new WP_Error( 'failed_to_decrypt', __( 'Failed to decrypt the access key.', 'surerank' ) );
		}

// json decode the decrypted data.
		$decrypted_data_array = json_decode( $decrypted, true );

if ( ! is_array( $decrypted_data_array ) || empty( $decrypted_data_array ) ) {
			return new WP_Error( 'failed_to_json_decode', __( 'Failed to json decode the decrypted data.', 'surerank' ) );
		}

// verify the nonce that comes in $encrypted_email_array.
		if ( ! empty( $decrypted_data_array['nonce'] ) && ! wp_verify_nonce( $decrypted_data_array['nonce'], 'surerank_ai_auth_nonce' ) ) {
			return new WP_Error( 'nonce_verification_failed', __( 'Nonce verification failed.', 'surerank' ) );
		}

// check if the user email is present in the decrypted data.
		if ( empty( $decrypted_data_array['user_email'] ) ) {
			return new WP_Error( 'no_user_email', __( 'No user email found in the decrypted data.', 'surerank' ) );
		}

// Extract is_subscribed value if present.
		$is_subscribed = false;
		if ( isset( $decrypted_data_array['is_subscribed'] ) ) {
			// Convert string 'true'/'false' to boolean if needed.
			if ( is_string( $decrypted_data_array['is_subscribed'] ) ) {
				$is_subscribed = 'true' === $decrypted_data_array['is_subscribed'];
			} else {
				$is_subscribed = (bool) $decrypted_data_array['is_subscribed'];
			}

// Update the analytics option based on the preference.
			// Set 'yes' if opted in, empty string if not.
			$enable_contribution = $is_subscribed ? 'yes' : '';
			update_option( 'surerank_usage_optin', $enable_contribution );

// Remove is_subscribed from the decrypted data.
			unset( $decrypted_data_array['is_subscribed'] );
		}

// remove the nonce from the decrypted data before saving it to the options.
		unset( $decrypted_data_array['nonce'] );

// save the user email to the options.
		update_option( self::SETTINGS_KEY, $decrypted_data_array );

return true;
	}
}

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