<?php
/**
 * Plugin Name: ReCaptcha v2 for Contact Form 7
 * Description: ReCaptcha v2 Fix for Contact Form 7 5.1 and later.
 * Version: 1.2.7
 * Author: IQComputing
 * Author URI: http://www.iqcomputing.com/
 * License: GPL2
 * Text Domain: wpcf7-recaptcha
 */


defined( 'ABSPATH' ) or die( 'You cannot be here.' );


/**
 * IQComputing Contact Form 7 reCaptcha Fix, Deity Class
 */
Class IQFix_WPCF7_Deity {

	
	/**
	 * WPCF7 ReCaptcha Plugin Version
	 * 
	 * @var String
	 */
	public static $version = '1.2.7';


	/**
	 * Class Registration, set up necessities
	 * 
	 * @return void
	 */
	public static function register() {

		$class = new self();
		$class->action_hooks();
		$class->filter_hooks();
		$class->include_files();

	}
	
	
	/**
	 * Really don't like dynamically assigning URLs by user saved options.
	 * This method will verify at every stage that the given value is either
	 * `google.com` or `recaptcha.net`
	 * Nowhere in between can this value be changed to anything but those two.
	 * 
	 * @param $expectation
	 * 
	 * @return $reality
	 */
	public static function verify_recaptcha_source( $expectation = 'google.com' ) {
		
		$reality = ( in_array( $expectation, array( 'google.com', 'recaptcha.net' ) ) ) ? $expectation : 'google.com';
		
		return $reality;
		
	}

	
	/**
	 * Include any necessary files
	 * 
	 * @return void
	 */
	private function include_files() {
		
		$selection 		= WPCF7::get_option( 'iqfix_recaptcha' );
		$cf7_version 	= ( defined( 'WPCF7_VERSION' ) ) ? WPCF7_VERSION : WPCF7::get_option( 'version', '0' );

		// Prevent update from v2 to v3 notice.
		WPCF7::update_option( 'recaptcha_v2_v3_warning', false );

		if( empty( $selection ) || version_compare( $cf7_version, '5.1', '<' ) ) {
			return;
		}

		include_once( plugin_dir_path( __FILE__ ) . 'recaptcha-v2.php' );
		
		if( class_exists( 'Flamingo_Contact' ) ) {
			include_once( plugin_dir_path( __FILE__ ) . 'flamingo.php' );	// Flamingo updates
		}

	}
	
	
	/**
	 * Save the reCaptcha settings from our options page
	 * @see IQFix_WPCF7_Deity::display_recaptcha_version_subpage()
	 * 
	 * @return Boolean
	 */
	private function save_recaptcha_settings() {
		
		// Form hasn't POSTed, return early
		if( ! isset( $_POST, $_POST['iqfix_recaptcha_version'], $_POST['iqfix_wpcf7_submit'] ) ) {
			return false;
		}
		
		// Ensure we have and can verify our nonce. IF not, return early
		if( ! ( ! empty( $_POST['iqfix_wpcf7_nonce'] ) && wp_verify_nonce( $_POST['iqfix_wpcf7_nonce'], 'iqfix_wpcf7_vers_select' ) ) ) {
			return false;
		}
			
		$selection 	= intval( $_POST['iqfix_recaptcha_version'] );
		$source		= ( isset( $_POST, $_POST['iqfix_recaptcha_source'] ) ) ? sanitize_text_field( $_POST['iqfix_recaptcha_source'] ) : 'google.com';
		$source		= self::verify_recaptcha_source( $source );
		
		// Save Network Settings
		if( is_network_admin() && isset( $_POST['wpcf7_recaptcha_network'] ) ) {
			
			$sitekey 	= trim( $_POST['wpcf7_recaptcha_network']['sitekey'] );
			$secretkey 	= trim( $_POST['wpcf7_recaptcha_network']['secretkey'] );
			
			update_site_option( 'network_iqfix_recaptcha', array(
				'sitekey' 			=> $sitekey,
				'secret'			=> $secretkey,
				'iqfix_recaptcha'	=> $selection,
				'recaptcha_source'	=> $source,
			) );
		
		// Save Regular WPCF7 Settings
		} else {
		
			WPCF7::update_option( 'iqfix_recaptcha', 		$selection 	);
			WPCF7::update_option( 'iqfix_recaptcha_source', $source 	);
			
		}
		
		return true;
		
	}


	/**
	 * Add any necessary action hooks
	 * 
	 * @return void
	 */
	private function action_hooks() {

		add_action( 'admin_menu',			array( $this, 'register_submenus' ) );
		add_action( 'network_admin_menu', 	array( $this, 'register_network_submenus' ) );

	}
	
	
	/**
	 * Add any necessary filter hooks
	 * 
	 * @return void
	 */
	private function filter_hooks() {
		
		add_filter( 'option_wpcf7', array( $this, 'network_wpcf7_options' ), 9 );
		
	}


	/**
	 * Register submenus for picking ReCaptcha versions
	 * 
	 * @return void
	 */
	public function register_submenus() {
		
		$cf7_admin_cap = ( defined( 'WPCF7_ADMIN_READ_WRITE_CAPABILITY' ) ) ? WPCF7_ADMIN_READ_WRITE_CAPABILITY : 'publish_pages';
		
		add_submenu_page( 
			'wpcf7',
			esc_html__( 'reCaptcha Version', 'wpcf7-recaptcha' ),
			esc_html__( 'reCaptcha Version', 'wpcf7-recaptcha' ),
			$cf7_admin_cap,
			'recaptcha-version',
			array( $this, 'display_recaptcha_version_subpage' )
		);

	}
	
	
	/**
	 * Register submenus for the Network Admin Panel
	 * 
	 * @return void
	 */
	public function register_network_submenus() {
		
		add_submenu_page( 
			'plugins.php',
			esc_html__( 'WPCF7 reCaptcha Settings', 'wpcf7-recaptcha' ),
			esc_html__( 'WPCF7 reCaptcha Settings', 'wpcf7-recaptcha' ),
			'manage_network_plugins',
			'recaptcha-version',
			array( $this, 'display_recaptcha_version_subpage' )
		);
		
	}


	/**
	 * Display reCaptcha version subpage
	 * 
	 * @return void
	 */
	public function display_recaptcha_version_subpage() {
		
		$updated 		= $this->save_recaptcha_settings();
		$cf7_version 	= ( defined( 'WPCF7_VERSION' ) ) ? WPCF7_VERSION : WPCF7::get_option( 'version', '0' );
		
		// Grab Network Settings
		if( is_network_admin() ) {
			
			$network_options = get_site_option( 'network_iqfix_recaptcha' );
			$selection		 = ( ! empty( $network_options['iqfix_recaptcha'] ) ) 	? $network_options['iqfix_recaptcha'] 	: '';
			$source			 = ( ! empty( $network_options['recaptcha_source'] ) )	? $network_options['recaptcha_source']	: '';
			$sitekey		 = ( ! empty( $network_options['sitekey'] ) ) 			? $network_options['sitekey'] 			: '';
			$secretkey		 = ( ! empty( $network_options['secret'] ) ) 			? $network_options['secret'] 			: '';
			
		// Grab Site Settings
		} else {
			
			$selection 	= WPCF7::get_option( 'iqfix_recaptcha' );
			$source 	= WPCF7::get_option( 'iqfix_recaptcha_source' );
			
		}

		// Show simple message
		if( version_compare( $cf7_version, '5.1', '<' ) ) {
			printf(
				'<div class="wrap"><h1>%1$s</h1><p>%2$s</p></div>',
				esc_html__( 'ReCaptcha v2 for Contact Form 7', 'wpcf7-recaptcha' ),
				esc_html__( 'This version of Contact Form 7 already uses reCaptcha version 2, you do not need \'ReCaptcha v2 for Contact Form 7\' installed at this time.', 'wpcf7-recaptcha' )
			);
			return;
		}

		?>

			<div class="wrap">
				<style>
					#iqFacebook		{margin-top: 40px;}
					#iqFacebook a	{display: inline-block; margin-bottom: 12px;}
					#iqFacebook img	{display: block; max-width: 100%; height: auto;}
				</style>

				<?php

					printf( '<h1>%1$s</h1>', esc_html__( 'ReCaptcha v2 for Contact Form 7', 'wpcf7-recaptcha' ) );

					if( $updated ) {
						printf(
							'<div class="notice updated"><p>%1$s</p></div>',
							esc_html__( 'Your reCaptcha settings have been updated.', 'wpcf7-recaptcha' )
						);
					}
					
					/* translators: %s is a shortcode example wrapped in <code> tags. */
					printf( '<p>%1$s</p>',
						sprintf( esc_html__( 'Select the version of reCaptcha you would like to use. You will still need to use the %s shortcode tag in your Contact Form 7 forms.', 'wpcf7-recaptcha' ),
							'<code>[recaptcha]</code>'
						)
					);
				?>

				<form method="post">
					<?php wp_nonce_field( 'iqfix_wpcf7_vers_select', 'iqfix_wpcf7_nonce' ); ?>
					
					<label for="iqfix_recaptcha_version"><strong><?php esc_html_e( 'Select reCaptcha Usage', 'wpcf7-recaptcha' ); ?>:</strong></label><br />
					<select id="iqfix_recaptcha_version" name="iqfix_recaptcha_version">
						<option value="0"><?php esc_html_e( 'Default Usage', 'wpcf7-recaptcha' ); ?></option>
						<option value="2" <?php selected( $selection, 2, true ); ?>><?php esc_html_e( 'reCaptcha Version 2', 'wpcf7-recaptcha' ); ?></option>
					</select>
					
					<?php printf( '<p>%s</p>', esc_html__( 'If you\'re not sure if your country blocks Google then you may leave this as default. Otherwise, if your country blocks google.com requests then please select the suggested recaptcha.net alternative below.', 'wpcf7-recaptcha' ) ); ?>
					
					<label for="iqfix_recaptcha_source"><strong><?php esc_html_e( 'Select reCaptcha Source', 'wpcf7-recaptcha' ); ?>:</strong></label><br />
					<select id="iqfix_recaptcha_source" name="iqfix_recaptcha_source">
						<option value="google.com">google.com</option>
						<option value="recaptcha.net" <?php selected( $source, 'recaptcha.net', true ); ?>>recaptcha.net</option>
					</select>
					
					<?php if( is_network_admin() ) : ?>
						
						<hr />
						<h2><?php esc_html__( 'Network Wide Settings', 'wpcf7-recaptcha' ); ?></h2>
						
						<p><strong><?php _e( 'Please read all of the below before committing to these changes.', 'wpcf7-recaptcha' ); ?></strong></p>
						<p><?php _e( 'You may set Network wide API keys below. Please ensure that every network site is whitelisted in the Google API Console. ReCaptcha keys can still be set ( or unset ) on a per site basis if necessary.', 'wpcf7-recaptcha' ); ?></p>
						<p><?php
							/* translators: Care for HTML in string used for emphasis. */
							_e( 'Do note that these keys will automatically apply to all network websites upon save <strong>if keys are not detected</strong>. If some network websites use reCaptcha v3 please <u>do not use this option</u> and set it on a per site level.', 'wpcf7-recaptcha' );
						?></p>
						
						<table class="form-table">
							<tbody>
								<tr>
									<th><?php _e( 'Site Key', 'wpcf7-recaptcha' ); ?></th>
									<td><input type="text" name="wpcf7_recaptcha_network[sitekey]" class="regular-text" value="<?php echo esc_attr( $sitekey ); ?>" /></td>
								</tr>
								<tr>
									<th><?php _e( 'Secret Key', 'wpcf7-recaptcha' ); ?></th>
									<td><input type="password" name="wpcf7_recaptcha_network[secretkey]" class="regular-text" value="<?php echo esc_attr( $secretkey ); ?>" /></td>
								</tr>
							</tbody>
						</table>
						
					<?php endif; ?>
					
					<?php submit_button( esc_html__( 'Submit', 'wpcf7-recaptcha' ), 'submit', 'iqfix_wpcf7_submit' ); ?>
				</form>
				
				<div id="iqFacebook">
					<?php
						printf( '<a href="%1$s" target="_blank"><img src="%2$s" width="540" height="410" alt="%3$s" /></a>', 
							esc_url( 'https://www.facebook.com/iqcomputing' ),
							plugins_url( 'assets/images/facebook-like.png', __FILE__ ),
							/* translators: Image alternative tag. */
							esc_attr__( 'Like IQComputing on Facebook mascot', 'wpcf7-recaptcha' )
						);
						printf( '<p>%1$s</p>',
							esc_html__( 'Click the image above and like us on Facebook! Facebook is where you will receive the latest news on both this plugin and all future IQComputing plugins.', 'wpcf7-recaptcha' )
						);
					?>
				</div> <!-- id="iqFacebook" -->

			</div>

		<?php

	}
	
	
	/**
	 * Filter Hook into WPCF7 get option
	 * Maybe replace it work a network option
	 * 
	 * @param Mixed $value
	 * @param Stirng $option_name
	 * 
	 * @return Mixed $value
	 */
	public function network_wpcf7_options( $value ) {
		
		// If we're not on a multisite setup we can skip this filter hook
		if( ! is_multisite() || empty( $value ) ) {
			return $value;
		}
		
		// Allow sites to be setup regardless of network specifciations
		if( is_admin()
			&& isset( $_GET, $_GET['page'], $_GET['service'], $_GET['action'] )
			&& 'wpcf7-integration' == $_GET['page']
			&& 'recaptcha' == $_GET['service']
			&& 'setup' == $_GET['action']
		) {
			return $value;
		}
		
		// Grab Network Option
		$network_wpcf7 = get_site_option( 'network_iqfix_recaptcha' );
		$network_wpcf7 = array_filter( (array)$network_wpcf7 );

		// Set site keys IF there are no API keys set.
		if( empty( $value['recaptcha'] ) && ! empty( $network_wpcf7['sitekey'] ) && ! empty( $network_wpcf7['secret'] ) ) {
			$value['recaptcha'] = array(
				$network_wpcf7['sitekey'] => $network_wpcf7['secret'],
			);
		}
		
		// Set IQFix reCaptcha
		if( ! isset( $value['iqfix_recaptcha'] ) && ! empty( $network_wpcf7['iqfix_recaptcha'] ) ) {
			$value['iqfix_recaptcha'] = $network_wpcf7['iqfix_recaptcha'];
		}
		
		// Set IQFix reCaptcha Source
		if( ! isset( $value['iqfix_recaptcha_source'] ) && ! empty( $network_wpcf7['recaptcha_source'] ) ) {
			$value['iqfix_recaptcha_source'] = $network_wpcf7['recaptcha_source'];
		}
		
		return $value;
		
	}


} // END Class IQFix_WPCF7_Deity


/**
 * Initialize Class
 * 
 * @return void
 */
function iqfix_wpcf7_deity_init() {

	if( class_exists( 'WPCF7' ) ) {
		IQFix_WPCF7_Deity::register();
	}

}
add_action( 'plugins_loaded', 'iqfix_wpcf7_deity_init' );


/**
 * Remove upgrade notice from v2 to v3
 * Prevent api keys from being reset.
 * 
 * @return void
 */
function iqfix_wpcf7_upgrade_recaptcha_v2_v3_removal() {

	remove_action( 'wpcf7_upgrade', 'wpcf7_upgrade_recaptcha_v2_v3', 10 );

}
add_action( 'admin_init', 'iqfix_wpcf7_upgrade_recaptcha_v2_v3_removal', 9 );