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<?php |
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/** |
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* AJAX Donation Handler |
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* |
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* @package SureDonation |
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*/ |
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|
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namespace SureDonation\Inc\Ajax; |
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|
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use SureDonation\Inc\Database\Tables\Donations; |
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use SureDonation\Inc\Database\Tables\Donors; |
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use SureDonation\Inc\Emails\Email_Handler; |
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use SureDonation\Inc\Helper; |
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use SureDonation\Inc\Payments\Payment_Helper; |
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use SureDonation\Inc\Traits\Get_Instance; |
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|
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// Exit if accessed directly. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Donation_Handler class. |
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* |
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* @since 0.0.1 |
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*/ |
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class Donation_Handler { |
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use Get_Instance; |
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|
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/** |
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* Constructor. |
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* |
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* @since 0.0.1 |
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*/ |
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public function __construct() { |
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add_action( 'wp_ajax_suredonation_submit_donation', [ $this, 'handle_donation_submission' ] ); |
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add_action( 'wp_ajax_nopriv_suredonation_submit_donation', [ $this, 'handle_donation_submission' ] ); |
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|
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// Runtime gateway configuration, read by the form script when it initialises. |
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add_action( 'wp_ajax_suredonation_gateway_config', [ $this, 'get_gateway_config' ] ); |
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add_action( 'wp_ajax_nopriv_suredonation_gateway_config', [ $this, 'get_gateway_config' ] ); |
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} |
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|
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/** |
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* Serve the gateway configuration for a donation form. |
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* |
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* Public read, fetched by the form script when it initialises so the Stripe |
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* key, PayPal SDK URL, payment mode and currency reflect the settings as |
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* they are now — not as they were when a page cache stored the form. It |
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* goes through admin-ajax, which page caches leave alone by default and |
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* which keeps working on sites that restrict the REST API for visitors. |
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* |
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* @return void |
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* @since 1.5.1 |
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*/ |
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public function get_gateway_config() { |
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// Throttle abuse as every other public endpoint does. The ceiling is |
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// far above the default because this fires once per form page view, |
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// not per donor action, and many visitors can legitimately share one |
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// address (an office or campus NAT). When it trips, the scripts fall |
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// back to the rendered configuration rather than failing. |
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if ( ! Helper::check_rate_limit( 'gateway_config', 120 ) ) { |
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wp_send_json_error( [ 'message' => __( 'Too many requests. Please wait a moment and try again.', 'suredonation' ) ], 429 ); |
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} |
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|
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Public read of non-secret data; nothing changes state, and a nonce would be cached with the page it is meant to protect. |
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$form_id = isset( $_GET['form_id'] ) ? absint( $_GET['form_id'] ) : 0; |
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|
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// Freshness is the whole point of this response. admin-ajax already |
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// sends these, but an edge cache with a blanket rule would not care, |
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// so the guarantee is made explicit rather than inherited. |
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nocache_headers(); |
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|
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wp_send_json_success( Payment_Helper::get_frontend_gateway_config( $form_id ) ); |
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} |
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|
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/** |
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* Handle donation form submission. |
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* |
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* @return void |
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* @since 0.0.1 |
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*/ |
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public function handle_donation_submission() { |
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// Throttle abuse on this public endpoint before doing any work. |
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if ( ! Helper::check_rate_limit( 'submit_donation' ) ) { |
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wp_send_json_error( __( 'Too many requests. Please wait a moment and try again.', 'suredonation' ), 429 ); |
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} |
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|
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// First check if nonce exists before accessing any other POST data. |
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if ( ! isset( $_POST['suredonation_nonce'] ) ) { |
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wp_send_json_error( __( 'Security check failed', 'suredonation' ) ); |
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} |
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|
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// Sanitize nonce value. |
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$nonce = sanitize_text_field( wp_unslash( $_POST['suredonation_nonce'] ) ); |
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|
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// Now get values needed to determine nonce action. |
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$is_standalone = isset( $_POST['is_standalone'] ) && '1' === $_POST['is_standalone']; |
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$campaign_id = isset( $_POST['campaign_id'] ) ? absint( $_POST['campaign_id'] ) : 0; |
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|
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// Standalone forms must not have a campaign — prevent bypass of campaign validation. |
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if ( $is_standalone ) { |
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$campaign_id = 0; |
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} |
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|
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// Verify nonce - different nonce for standalone vs campaign-linked forms. |
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$nonce_action = Helper::get_donation_nonce_action( $campaign_id ); |
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|
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if ( ! wp_verify_nonce( $nonce, $nonce_action ) ) { |
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wp_send_json_error( __( 'Security check failed', 'suredonation' ) ); |
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} |
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|
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// Reject bot submissions caught by the honeypot before processing. |
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if ( Helper::is_honeypot_spam() ) { |
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wp_send_json_error( __( 'Your submission was flagged as spam. Please try again.', 'suredonation' ) ); |
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} |
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|
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// Validate campaign only if not standalone. |
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$campaign = null; |
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if ( ! $is_standalone ) { |
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if ( ! $campaign_id ) { |
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wp_send_json_error( __( 'Invalid campaign', 'suredonation' ) ); |
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} |
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|
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$campaign = get_post( $campaign_id ); |
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if ( ! $campaign || SUREDONATION_POST_TYPE !== $campaign->post_type ) { |
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wp_send_json_error( __( 'Invalid campaign', 'suredonation' ) ); |
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} |
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} |
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|
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// Get form data. |
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$amount = isset( $_POST['amount'] ) ? floatval( $_POST['amount'] ) : 0; |
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$cover_fees = isset( $_POST['cover_fees'] ) && 'true' === $_POST['cover_fees']; |
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// The anonymous flag is display-only: the donor's real name is stored as |
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// usual below and only public surfaces mask it. |
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$donor_name = sanitize_text_field( wp_unslash( $_POST['donor_name'] ?? '' ) ); |
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$donor_email = sanitize_email( wp_unslash( $_POST['donor_email'] ?? '' ) ); |
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$donor_comment = sanitize_textarea_field( wp_unslash( $_POST['donor_comment'] ?? '' ) ); |
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|
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// Get form_id and block_id for amount validation. |
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$form_id = isset( $_POST['form_id'] ) ? absint( $_POST['form_id'] ) : 0; |
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$is_anonymous = Payment_Helper::get_submitted_is_anonymous( $form_id ); |
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// Derive the donor phone from the validated mapped field, not a separate |
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// unvalidated $_POST['donor_phone'] (see Payment_Helper::get_mapped_donor_phone). |
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$donor_phone = Payment_Helper::get_mapped_donor_phone( $form_id ); |
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$block_id = isset( $_POST['block_id'] ) ? sanitize_text_field( wp_unslash( $_POST['block_id'] ) ) : ''; |
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|
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// Validate required fields. |
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if ( $amount <= 0 ) { |
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wp_send_json_error( __( 'Invalid donation amount', 'suredonation' ) ); |
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} |
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|
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// Require form_id and block_id for amount validation — reject if missing to prevent bypass. |
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if ( empty( $form_id ) || empty( $block_id ) ) { |
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wp_send_json_error( __( 'Invalid form configuration.', 'suredonation' ) ); |
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} |
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|
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// Validate field values + amount against block configuration. Pass the |
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// offline gateway so the Stripe-only minimum floor is not applied here. |
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$currency = Payment_Helper::get_currency(); |
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$validation_result = Payment_Helper::validate_submission( Payment_Helper::get_submitted_fields(), $amount, $currency, $form_id, $block_id, 'offline', 'one-time' ); |
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if ( ! $validation_result['valid'] ) { |
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wp_send_json_error( esc_html( $validation_result['message'] ) ); |
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} |
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|
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// Name and email are required whether or not the donation is anonymous — |
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// the flag only masks the name on public surfaces, so there still has to |
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// be a real name to mask (matches the gateway handlers, which validate |
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// these through validate_submission() regardless of the flag). |
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if ( empty( $donor_name ) ) { |
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wp_send_json_error( __( 'Donor name is required', 'suredonation' ) ); |
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} |
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if ( empty( $donor_email ) || ! is_email( $donor_email ) ) { |
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wp_send_json_error( __( 'Valid email address is required', 'suredonation' ) ); |
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} |
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|
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// Server-side fee calculation — ignore client-supplied base_amount to prevent manipulation. |
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$base_amount = $amount; |
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$fees_covered = 0; |
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|
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if ( $cover_fees && $base_amount > 0 ) { |
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$fee_config = Payment_Helper::get_cover_fees_config( $form_id, 'offline' ); |
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|
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if ( ! $fee_config['enabled'] ) { |
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$cover_fees = false; |
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} |
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|
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if ( $cover_fees ) { |
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$fees_covered = Payment_Helper::calculate_fee( $base_amount, $fee_config['fee_percentage'], $fee_config['fee_fixed'] ); |
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} else { |
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$fees_covered = 0; |
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} |
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} |
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|
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// Get or create donor. The email is validated as non-empty above, so |
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// there is no guard here — anonymous or not, this path always has one. |
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$donor_id = Donors::get_or_create( $donor_email, $donor_name, $donor_phone ); |
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|
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// Get payment mode. |
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$payment_mode = 'live'; |
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if ( class_exists( 'SureDonation\Inc\Payments\Payment_Helper' ) ) { |
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$payment_mode = Payment_Helper::get_payment_mode(); |
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} |
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|
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// Create donation in database. |
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$donation_id = Donations::add( |
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[ |
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'campaign_id' => $campaign_id, |
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'donor_id' => $donor_id ? $donor_id : 0, |
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'amount' => number_format( $base_amount, 2, '.', '' ), |
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'fees_covered' => number_format( $fees_covered, 2, '.', '' ), |
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'currency' => Payment_Helper::get_currency(), |
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'gateway' => 'manual', |
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'payment_status' => 'pending', |
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'payment_mode' => $payment_mode, |
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'donor_name' => $donor_name, |
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'donor_email' => $donor_email, |
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'donor_phone' => $donor_phone, |
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'is_anonymous' => $is_anonymous ? 1 : 0, |
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'donation_type' => 'one-time', |
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'donor_comment' => $donor_comment, |
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'form_id' => $form_id, |
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'ip_address' => Helper::get_client_ip(), |
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'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : '', |
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'referer_url' => isset( $_SERVER['HTTP_REFERER'] ) ? esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ) ) : '', |
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] |
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); |
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|
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if ( ! $donation_id ) { |
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wp_send_json_error( __( 'Failed to create donation', 'suredonation' ) ); |
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} |
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|
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// Persist the submitted field values for the entry record. |
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Donations::set_submitted_fields( $donation_id, Payment_Helper::get_submitted_field_data() ); |
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|
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// Note: Donation status will be updated by payment gateway webhooks or manual confirmation. |
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|
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// This donation is created as pending/manual, so send the "processing" |
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// (donation received) email rather than the completed-confirmation |
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// email. The confirmation email is reserved for when payment is |
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// actually confirmed, matching the gateway flows. |
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$donation_data = [ |
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'id' => $donation_id, |
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'donor_name' => $donor_name, |
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'donor_email' => $donor_email, |
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'amount' => $base_amount, |
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'fees_covered' => $fees_covered, |
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'currency' => Payment_Helper::get_currency(), |
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'gateway' => 'manual', |
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// One-time regardless of the block's configured type, and intentionally |
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// unguarded: this handler has no remaining caller in src/, writes a |
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// record rather than moving money, and gating it on payment type would |
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// reject manual entries on recurring forms. Whether it should still be |
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// registered at all is the better question, tracked separately. |
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'donation_type' => 'one-time', |
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]; |
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|
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Email_Handler::send_donation_processing( $donation_id, $campaign_id, $donation_data, $form_id ); |
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|
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// Build the confirmation/thank-you HTML from the form's confirmation message. |
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$confirmation_html = Helper::render_confirmation_message( $donation_id ); |
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if ( '' === $confirmation_html ) { |
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$confirmation_html = esc_html__( 'Your generous contribution will make a real difference. A confirmation email has been sent to you.', 'suredonation' ); |
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} |
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|
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// Send success response. |
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wp_send_json_success( |
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[ |
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'donation_id' => $donation_id, |
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'message' => $confirmation_html, |
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] |
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); |
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} |
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} |
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|
