php 重力Wiz //重力形式//货币转换器

Posted 2021-05-05

<?php
/**
 * Gravity Wiz // Gravity Forms // Currency Converter
 *
 * Enter prices in default currency and display prices in another currency.
 *
 * @version  0.2
 * @author   David Smith <[e-mail]>
 * @license  GPL-2.0+
 * @link     http://gravitywiz.com/
 *
 * Plugin Name:  Gravity Forms Currency Converter
 * Plugin URI:   http://gravitywiz.com/
 * Description:  Enter prices in default currency and display prices in another currency.
 * Author:       Gravity Wiz
 * Version:      0.2
 * Author URI:   http://gravitywiz.com
 */
class GW_Currency_Converter {

    protected static $is_script_output = false;

    public function __construct( $args = array() ) {

        // set our default arguments, parse against the provided arguments, and store for use throughout the class
        $this->_args = wp_parse_args( $args, array(
            'app_id' => '',
        ) );

        // do version check in the init to make sure if GF is going to be loaded, it is already loaded
        add_action( 'init', array( $this, 'init' ) );

    }

    public function init() {

        // make sure we're running the required minimum version of Gravity Forms
        if( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) ) {
            return;
        }

	    add_filter( 'gform_tooltips',               array( $this, 'add_tooltips' ) );
        add_action( 'gform_form_settings',          array( $this, 'add_form_setting' ), 10, 2 );
        add_action( 'gform_pre_form_settings_save', array( $this, 'save_form_settings' ) );

        add_filter( 'gform_pre_render',            array( $this, 'load_form_script' ), 10, 2 );
        add_filter( 'gform_register_init_scripts', array( $this, 'add_init_script' ), 10, 2 );
        add_filter( 'gform_enqueue_scripts',       array( $this, 'add_currency_global' ) );

	    //add_filter( 'gform_pre_render',            array( $this, 'prepare_form' ), 10, 2 );

    }

    public function add_tooltips( $tooltips ) {
    	$tooltips['gwcc_convert_currency'] = sprintf(
			'<h6>%s</h6> %s',
			__( 'Convert Currency on Render' ),
			sprintf( __( 'Enable this option to convert the currency from your configured currency (%s) to the selected currency on render.' ), GFCommon::get_currency() )
	    );
    	return $tooltips;
    }

    public function add_form_setting( $form_settings, $form ) {
    	ob_start();
	    $current_currency = rgar( $form, 'gwccConvertCurrency' );
    	?>

	    <tr>
		    <th>
			    <label for="gwcc_convert_currency"><?php printf( '%s %s', __( 'Convert Currency on Render' ), gform_tooltip( 'gwcc_convert_currency', '', true ) ); ?></label>
		    </th>
		    <td>
			    <select id="gwcc_convert_currency" name="gwcc_convert_currency">
				    <option value=""><?php _e( 'No conversion.', 'gw-currency-converter' ); ?></option>
	                <?php foreach ( RGCurrency::get_currencies() as $code => $currency ): ?>
	                    <option value="<?php echo esc_attr( $code ) ?>" <?php selected( $current_currency, $code ); ?>><?php echo esc_html( $currency['name'] ) ?></option>
	                <?php endforeach; ?>
			    </select>
		    </td>
	    </tr>

	    <?php
    	$form_settings['Form Options']['gwcc_convert_currency'] = ob_get_clean();
    	return $form_settings;
    }

    public function save_form_settings( $form ) {
    	if( isset( $_POST['gwcc_convert_currency'] ) ) {
		    $form['gwccConvertCurrency'] = $_POST['gwcc_convert_currency'];
	    }
    	return $form;
    }

    public function load_form_script( $form, $is_ajax_enabled ) {

    	// 1 - Make sure it's the right form.
	    // 2 - Make sure we haven't already output the script.
	    // 3 - Make sure we don't output the script if any 3rd party code is running 'gform_pre_render' prematurely.
	    $did_header = did_action( 'wp_head' ) || rgget( 'gf_page' ) == 'preview';
	    if( $this->is_applicable_form( $form ) && ! self::$is_script_output && ! $this->is_ajax_submission( $form['id'], $is_ajax_enabled ) && $did_header ) {
		    $this->output_script();
	    }

        return $form;
    }

    public function is_ajax_submission( $form_id, $is_ajax_enabled ) {
        return isset( GFFormDisplay::$submission[ $form_id ] ) && $is_ajax_enabled;
    }

    public function output_script() {
        ?>

        <script type="text/javascript">

            ( function( $ ) {

                window.GWCurrencyConverter = function( args ) {

                    var self = this;

                    // copy all args to current object: (list expected props)
                    for( prop in args ) {
                        if( args.hasOwnProperty( prop ) )
                            self[prop] = args[prop];
                    }

                    self.init = function() {

                        // do the magic

                    };

	                GWCurrencyConverter.convert = function( value, currencyCode ) {

		                var targetRate = rgars( GWCurrencyConverterData.rates.rates, currencyCode ),
		                    converted  = value * targetRate;

		                return converted;
	                };

                    self.init();

                };

                window.origGformFormatMoney = window.gformFormatMoney;
                window.gformFormatMoney = function( text, isNumeric ) {

                	if( ! gf_global.gf_currency_config ) {
		                return text;
	                }

	                // If number has not already been cleaned, use global currency to clean the number.
                	if( ! isNumeric ) {
		                var currency = new Currency( gf_global.gf_currency_config );
		                text = gformCleanNumber( number, currency.currency['symbol_right'], currency.currency['symbol_left'], currency.currency['decimal_separator'] );
	                }

	                text = GWCurrencyConverter.convert( text, GWCurrencyConverterData.currencyCode );

	                currency = new Currency( GWCurrencyConverterData.currency );

	                return currency.toMoney( text, isNumeric );
                }

            } )( jQuery );

        </script>

        <?php

        self::$is_script_output = true;

    }

	public function add_currency_global( $form ) {
    	if( $this->is_applicable_form( $form ) ) {
		    wp_localize_script( 'gform_gravityforms', 'GWCurrencyConverterData', array(
			    'currencyCode' => $form['gwccConvertCurrency'],
			    'currency'     => RGCurrency::get_currency( $form['gwccConvertCurrency'] ),
			    'rates'        => $this->get_conversion_rates(),
		    ) );
	    }
	}

    public function add_init_script( $form ) {

        if( ! $this->is_applicable_form( $form ) ) {
            return;
        }

        $args = array( );

        $script = 'new GWCurrencyConverter( ' . json_encode( $args ) . ' );';
        $slug   = implode( '_', array( 'gw_currency_converter', $form['id'] ) );

        GFFormDisplay::add_init_script( $form['id'], $slug, GFFormDisplay::ON_PAGE_RENDER, $script );

    }

    public function get_conversion_rates() {

    	$rates = get_transient( 'gwcc_rates' );
    	if( $rates !== false ) {
    		return $rates;
	    }

	    $url = 'https://openexchangerates.org/api/latest.json?app_id=' . $this->_args['app_id'];
    	$response = wp_remote_get( $url );
    	if( wp_remote_retrieve_response_code( $response ) == 200 ) {
    		$rates = json_decode( wp_remote_retrieve_body( $response ) );
    		set_transient( 'gwcc_rates', $rates, 60 * 60 * 24 );
	    }

    	return $rates;
    }

    public function is_applicable_form( $form ) {
		return rgar( $form, 'gwccConvertCurrency' );
    }

}

# Configuration

new GW_Currency_Converter( array(
	'app_id' => '1c65801c9d1e40489c7601aee1252269'
) );