| 1 |
<?php |
| 2 |
/** |
| 3 |
* AJAX Donation Handler |
| 4 |
* |
| 5 |
* @package SureDonation |
| 6 |
*/ |
| 7 |
|
| 8 |
namespace SureDonation\Inc\Ajax; |
| 9 |
|
| 10 |
use SureDonation\Inc\Database\Tables\Donations; |
| 11 |
use SureDonation\Inc\Database\Tables\Donors; |
| 12 |
use SureDonation\Inc\Emails\Email_Handler; |
| 13 |
use SureDonation\Inc\Helper; |
| 14 |
use SureDonation\Inc\Payments\Payment_Helper; |
| 15 |
use SureDonation\Inc\Traits\Get_Instance; |
| 16 |
|
| 17 |
// Exit if accessed directly. |
| 18 |
if ( ! defined( 'ABSPATH' ) ) { |
| 19 |
exit; |
| 20 |
} |
| 21 |
|
| 22 |
/** |
| 23 |
* Donation_Handler class. |
| 24 |
* |
| 25 |
* @since 0.0.1 |
| 26 |
*/ |
| 27 |
class Donation_Handler { |
| 28 |
use Get_Instance; |
| 29 |
|
| 30 |
/** |
| 31 |
* Constructor. |
| 32 |
* |
| 33 |
* @since 0.0.1 |
| 34 |
*/ |
| 35 |
public function __construct() { |
| 36 |
add_action( 'wp_ajax_suredonation_submit_donation', [ $this, 'handle_donation_submission' ] ); |
| 37 |
add_action( 'wp_ajax_nopriv_suredonation_submit_donation', [ $this, 'handle_donation_submission' ] ); |
| 38 |
} |
| 39 |
|
| 40 |
/** |
| 41 |
* Handle donation form submission. |
| 42 |
* |
| 43 |
* @return void |
| 44 |
* @since 0.0.1 |
| 45 |
*/ |
| 46 |
public function handle_donation_submission() { |
| 47 |
// Throttle abuse on this public endpoint before doing any work. |
| 48 |
if ( ! Helper::check_rate_limit( 'submit_donation' ) ) { |
| 49 |
wp_send_json_error( __( 'Too many requests. Please wait a moment and try again.', 'suredonation' ), 429 ); |
| 50 |
} |
| 51 |
|
| 52 |
// First check if nonce exists before accessing any other POST data. |
| 53 |
if ( ! isset( $_POST['suredonation_nonce'] ) ) { |
| 54 |
wp_send_json_error( __( 'Security check failed', 'suredonation' ) ); |
| 55 |
} |
| 56 |
|
| 57 |
// Sanitize nonce value. |
| 58 |
$nonce = sanitize_text_field( wp_unslash( $_POST['suredonation_nonce'] ) ); |
| 59 |
|
| 60 |
// Now get values needed to determine nonce action. |
| 61 |
$is_standalone = isset( $_POST['is_standalone'] ) && '1' === $_POST['is_standalone']; |
| 62 |
$campaign_id = isset( $_POST['campaign_id'] ) ? absint( $_POST['campaign_id'] ) : 0; |
| 63 |
|
| 64 |
// Standalone forms must not have a campaign — prevent bypass of campaign validation. |
| 65 |
if ( $is_standalone ) { |
| 66 |
$campaign_id = 0; |
| 67 |
} |
| 68 |
|
| 69 |
// Verify nonce - different nonce for standalone vs campaign-linked forms. |
| 70 |
$nonce_action = Helper::get_donation_nonce_action( $campaign_id ); |
| 71 |
|
| 72 |
if ( ! wp_verify_nonce( $nonce, $nonce_action ) ) { |
| 73 |
wp_send_json_error( __( 'Security check failed', 'suredonation' ) ); |
| 74 |
} |
| 75 |
|
| 76 |
// Reject bot submissions caught by the honeypot before processing. |
| 77 |
if ( Helper::is_honeypot_spam() ) { |
| 78 |
wp_send_json_error( __( 'Your submission was flagged as spam. Please try again.', 'suredonation' ) ); |
| 79 |
} |
| 80 |
|
| 81 |
// Validate campaign only if not standalone. |
| 82 |
$campaign = null; |
| 83 |
if ( ! $is_standalone ) { |
| 84 |
if ( ! $campaign_id ) { |
| 85 |
wp_send_json_error( __( 'Invalid campaign', 'suredonation' ) ); |
| 86 |
} |
| 87 |
|
| 88 |
$campaign = get_post( $campaign_id ); |
| 89 |
if ( ! $campaign || SUREDONATION_POST_TYPE !== $campaign->post_type ) { |
| 90 |
wp_send_json_error( __( 'Invalid campaign', 'suredonation' ) ); |
| 91 |
} |
| 92 |
} |
| 93 |
|
| 94 |
// Get form data. |
| 95 |
$amount = isset( $_POST['amount'] ) ? floatval( $_POST['amount'] ) : 0; |
| 96 |
$cover_fees = isset( $_POST['cover_fees'] ) && 'true' === $_POST['cover_fees']; |
| 97 |
$is_anonymous = isset( $_POST['is_anonymous'] ) ? true : false; |
| 98 |
$donor_name = $is_anonymous ? __( 'Anonymous', 'suredonation' ) : sanitize_text_field( wp_unslash( $_POST['donor_name'] ?? '' ) ); |
| 99 |
$donor_email = sanitize_email( wp_unslash( $_POST['donor_email'] ?? '' ) ); |
| 100 |
$donor_phone = sanitize_text_field( wp_unslash( $_POST['donor_phone'] ?? '' ) ); |
| 101 |
$donor_comment = sanitize_textarea_field( wp_unslash( $_POST['donor_comment'] ?? '' ) ); |
| 102 |
|
| 103 |
// Get form_id and block_id for amount validation. |
| 104 |
$form_id = isset( $_POST['form_id'] ) ? absint( $_POST['form_id'] ) : 0; |
| 105 |
$block_id = isset( $_POST['block_id'] ) ? sanitize_text_field( wp_unslash( $_POST['block_id'] ) ) : ''; |
| 106 |
|
| 107 |
// Validate required fields. |
| 108 |
if ( $amount <= 0 ) { |
| 109 |
wp_send_json_error( __( 'Invalid donation amount', 'suredonation' ) ); |
| 110 |
} |
| 111 |
|
| 112 |
// Require form_id and block_id for amount validation — reject if missing to prevent bypass. |
| 113 |
if ( empty( $form_id ) || empty( $block_id ) ) { |
| 114 |
wp_send_json_error( __( 'Invalid form configuration.', 'suredonation' ) ); |
| 115 |
} |
| 116 |
|
| 117 |
// Validate field values + amount against block configuration. Pass the |
| 118 |
// offline gateway so the Stripe-only minimum floor is not applied here. |
| 119 |
$currency = Payment_Helper::get_currency(); |
| 120 |
$validation_result = Payment_Helper::validate_submission( Payment_Helper::get_submitted_fields(), $amount, $currency, $form_id, $block_id, 'offline' ); |
| 121 |
if ( ! $validation_result['valid'] ) { |
| 122 |
wp_send_json_error( esc_html( $validation_result['message'] ) ); |
| 123 |
} |
| 124 |
|
| 125 |
if ( ! $is_anonymous ) { |
| 126 |
if ( empty( $donor_name ) ) { |
| 127 |
wp_send_json_error( __( 'Donor name is required', 'suredonation' ) ); |
| 128 |
} |
| 129 |
if ( empty( $donor_email ) || ! is_email( $donor_email ) ) { |
| 130 |
wp_send_json_error( __( 'Valid email address is required', 'suredonation' ) ); |
| 131 |
} |
| 132 |
} |
| 133 |
|
| 134 |
// Server-side fee calculation — ignore client-supplied base_amount to prevent manipulation. |
| 135 |
$base_amount = $amount; |
| 136 |
$fees_covered = 0; |
| 137 |
|
| 138 |
if ( $cover_fees && $base_amount > 0 ) { |
| 139 |
$fee_config = Payment_Helper::get_cover_fees_config( $form_id, 'offline' ); |
| 140 |
|
| 141 |
if ( ! $fee_config['enabled'] ) { |
| 142 |
$cover_fees = false; |
| 143 |
} |
| 144 |
|
| 145 |
if ( $cover_fees ) { |
| 146 |
$fees_covered = Payment_Helper::calculate_fee( $base_amount, $fee_config['fee_percentage'], $fee_config['fee_fixed'] ); |
| 147 |
} else { |
| 148 |
$fees_covered = 0; |
| 149 |
} |
| 150 |
} |
| 151 |
|
| 152 |
// Get or create donor. |
| 153 |
$donor_id = 0; |
| 154 |
if ( ! empty( $donor_email ) ) { |
| 155 |
$donor_id = Donors::get_or_create( $donor_email, $donor_name, $donor_phone ); |
| 156 |
} |
| 157 |
|
| 158 |
// Get payment mode. |
| 159 |
$payment_mode = 'live'; |
| 160 |
if ( class_exists( 'SureDonation\Inc\Payments\Payment_Helper' ) ) { |
| 161 |
$payment_mode = Payment_Helper::get_payment_mode(); |
| 162 |
} |
| 163 |
|
| 164 |
// Create donation in database. |
| 165 |
$donation_id = Donations::add( |
| 166 |
[ |
| 167 |
'campaign_id' => $campaign_id, |
| 168 |
'donor_id' => $donor_id ? $donor_id : 0, |
| 169 |
'amount' => number_format( $base_amount, 2, '.', '' ), |
| 170 |
'fees_covered' => number_format( $fees_covered, 2, '.', '' ), |
| 171 |
'currency' => Payment_Helper::get_currency(), |
| 172 |
'gateway' => 'manual', |
| 173 |
'payment_status' => 'pending', |
| 174 |
'payment_mode' => $payment_mode, |
| 175 |
'donor_name' => $donor_name, |
| 176 |
'donor_email' => $donor_email, |
| 177 |
'donor_phone' => $donor_phone, |
| 178 |
'is_anonymous' => $is_anonymous ? 1 : 0, |
| 179 |
'donation_type' => 'one-time', |
| 180 |
'donor_comment' => $donor_comment, |
| 181 |
'form_id' => $form_id, |
| 182 |
'ip_address' => Helper::get_client_ip(), |
| 183 |
'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : '', |
| 184 |
'referer_url' => isset( $_SERVER['HTTP_REFERER'] ) ? esc_url_raw( wp_unslash( $_SERVER['HTTP_REFERER'] ) ) : '', |
| 185 |
] |
| 186 |
); |
| 187 |
|
| 188 |
if ( ! $donation_id ) { |
| 189 |
wp_send_json_error( __( 'Failed to create donation', 'suredonation' ) ); |
| 190 |
} |
| 191 |
|
| 192 |
// Note: Donation status will be updated by payment gateway webhooks or manual confirmation. |
| 193 |
|
| 194 |
// This donation is created as pending/manual, so send the "processing" |
| 195 |
// (donation received) email rather than the completed-confirmation |
| 196 |
// email. The confirmation email is reserved for when payment is |
| 197 |
// actually confirmed, matching the gateway flows. |
| 198 |
$donation_data = [ |
| 199 |
'id' => $donation_id, |
| 200 |
'donor_name' => $donor_name, |
| 201 |
'donor_email' => $donor_email, |
| 202 |
'amount' => $base_amount, |
| 203 |
'fees_covered' => $fees_covered, |
| 204 |
'currency' => Payment_Helper::get_currency(), |
| 205 |
'gateway' => 'manual', |
| 206 |
'donation_type' => 'one-time', |
| 207 |
]; |
| 208 |
|
| 209 |
Email_Handler::send_donation_processing( $donation_id, $campaign_id, $donation_data, $form_id ); |
| 210 |
|
| 211 |
// Build the confirmation/thank-you HTML from the form's confirmation message. |
| 212 |
$confirmation_html = Helper::render_confirmation_message( $donation_id ); |
| 213 |
if ( '' === $confirmation_html ) { |
| 214 |
$confirmation_html = esc_html__( 'Your generous contribution will make a real difference. A confirmation email has been sent to you.', 'suredonation' ); |
| 215 |
} |
| 216 |
|
| 217 |
// Send success response. |
| 218 |
wp_send_json_success( |
| 219 |
[ |
| 220 |
'donation_id' => $donation_id, |
| 221 |
'message' => $confirmation_html, |
| 222 |
] |
| 223 |
); |
| 224 |
} |
| 225 |
} |
| 226 |
|
