Export Gift Aid data in Donation History Export Tool

give_export_gift_aid.php

<?php
function give_export_gift_aid() {
	?>
	<li>
		<label for="give-export-payment-gift_aid">
			<input type="checkbox" checked name="give_give_donations_export_option[gift_aid]" id="give-export-gift_aid"><?php _e( 'Gift Aid', 'give' ); ?>
		</label>
	</li>
	
	<?php
}

add_action( 'give_export_donation_standard_payment_fields', 'give_export_gift_aid' );

/**
* Thi function sets the column header in the generated CSV file for the custom field. Add an if statement for each aditional field.
*/
function give_export_gift_aid_column_header( $cols ) {
	if ( isset( $cols['gift_aid'] ) ) {
		$cols['gift_aid'] = __( 'Gift Aid', 'give' );
	}

	return $cols;

}

add_filter( 'give_export_donation_get_columns_name', 'give_export_gift_aid_column_header' );

/**
* This function populates the CSV with the custom field data. Add an if statement for each aditional field.
*/
use Give\Subscriptions\Models\Subscription;
function give_export_gift_aid_data( $data, $payment, $columns, $instance ) {
	if ( ! empty( $columns['gift_aid'] ) ) {
		// Renewals will have the subscription_id metakey
		$is_renewal = $payment->get_meta( 'subscription_id' );
		//error_log( 'Renewal: '. $is_renewal );
		//If it's a renewal, get the Gift Aid data from the parent payment
			
		
		if ( ! empty( $columns['gift_aid'] )) {
			if ( ! empty( $is_renewal ) ) {
				// Get the parent donation.
				$parent_donation_id = wp_get_post_parent_id( $payment->ID );
				if ( metadata_exists( 'post', $parent_donation_id, '_give_gift_aid_accept_term_condition' ) ) {
					$data['gift_aid'] = 'on';
				}
			} else {
				//$gift_data = 
				$data['gift_aid'] = $payment->get_meta( '_give_gift_aid_accept_term_condition' );
			}
		}

	}

	return $data;
}

add_filter( 'give_export_donation_data', 'give_export_gift_aid_data', 90, 4 );