Add support for currencies

[rvdsteege]

From customer, who wants to use the currency CHF to accept payments through Twint:

How can I define the currency?

Currently, only payments in EUR are supported — the default currency of the https://github.com/pronamic/wp-money library.

wp-pronamic-pay-contact-form-7/src/Pronamic.php

Lines 61 to 97 in 3dffa32

	public static function get_submission_payment( WPCF7_Submission $submission ) {
	$gateway = self::get_default_gateway();
	if ( null === $gateway ) {
	return null;
	}
	$submission_helper = new SubmissionHelper( $submission );
	// Total.
	$total = new Money();
	$parser = new Parser();
	$tags = $submission_helper->get_tags_with_basetype_or_name_or_option( 'pronamic_pay_amount' );
	foreach ( $tags as $tag ) {
	$values = $submission_helper->get_values_by_tag( $tag );
	foreach ( $values as $value ) {
	try {
	$amount = $parser->parse( $value );
	$total = $total->add( $amount );
	} catch ( \Exception $e ) {
	continue;
	}
	}
	}
	if ( $total->is_zero() ) {
	return null;
	}
	// Payment.
	$payment = new Payment();
	$payment->set_total_amount( $total );

There are multiple ways to achieve multi-currency:

• add a filter like pronamic_pay_contact_form_7_currency
• add pronamic_pay_currency field option
• add a general default currency plugin setting
• ...

@remcotolsma, thoughts?

Internal Help Scout ticket: https://secure.helpscout.net/conversation/2708876062/27722

[remcotolsma]

I searched for "contact form 7 currency setting" and came across https://contactform7.com/2015/02/27/using-values-from-a-form-tag/ . In that regard you would think a pronamic_pay_currency field option would be a good choice. Admins could possibly let visitors choose their own currency or define a different currency in a hidden field?