five-for-the-future/plugins/wporg-5ftf/includes/pledge-form.php

<?php
/**
 * Render and process the pledge forms.
 */

namespace WordPressDotOrg\FiveForTheFuture\PledgeForm;

use WordPressDotOrg\FiveForTheFuture;
use WordPressDotOrg\FiveForTheFuture\Pledge;
use WordPressDotOrg\FiveForTheFuture\PledgeMeta;
use WP_Error;

defined( 'WPINC' ) || die();

// Todo make this into simple optionless blocks instead?
add_shortcode( '5ftf_pledge_form_new', __NAMESPACE__ . '\render_form_new' );
add_shortcode( '5ftf_pledge_form_manage', __NAMESPACE__ . '\render_form_manage' );

/**
 * Render the form(s) for creating new pledges.
 *
 * @return false|string
 */
function render_form_new() {
	$action   = filter_input( INPUT_POST, 'action' );
	$messages = [];
	$complete = false;
	$data     = PledgeMeta\get_pledge_meta();

	if ( 'Submit Pledge' === $action ) {
		$processed = process_form_new();

		if ( is_wp_error( $processed ) ) {
			$messages = array_merge( $messages, $processed->get_error_messages() );
		} elseif ( 'success' === $processed ) {
			$complete = true;
		}
	}

	ob_start();
	$readonly = false;
	require FiveForTheFuture\PATH . 'views/form-pledge-new.php';

	return ob_get_clean();
}

/**
 * Process a submission from the New Pledge form.
 *
 * @return string|WP_Error String "success" if the form processed correctly. Otherwise WP_Error.
 */
function process_form_new() {
	$submission = filter_input_array( INPUT_POST, PledgeMeta\get_input_filters() );

	$has_required = PledgeMeta\has_required_pledge_meta( $submission );

	if ( is_wp_error( $has_required ) ) {
		return $has_required;
	}

	$email = sanitize_meta(
		PledgeMeta\META_PREFIX . 'org-pledge-email',
		$submission['org-pledge-email'],
		'post',
		Pledge\CPT_ID
	);

	if ( has_existing_pledge( $email, 'email' ) ) {
		return new WP_Error(
			'existing_pledge_email',
			__( 'This email address is already connected to an existing pledge.', 'wporg' )
		);
	}

	$domain = PledgeMeta\get_normalized_domain_from_url( $submission['org-url'] );

	if ( has_existing_pledge( $domain, 'domain' ) ) {
		return new WP_Error(
			'existing_pledge_domain',
			__( 'A pledge already exists for this domain.', 'wporg' )
		);
	}

	$name = sanitize_meta(
		PledgeMeta\META_PREFIX . 'org-name',
		$submission['org-name'],
		'post',
		Pledge\CPT_ID
	);

	$created = create_new_pledge( $name );

	if ( is_wp_error( $created ) ) {
		return $created;
	}

	PledgeMeta\save_pledge_meta( $created, $submission );

	return 'success';
}

/**
 * Render the form(s) for managing existing pledges.
 *
 * @return false|string
 */
function render_form_manage() {
	$action   = filter_input( INPUT_POST, 'action' );
	$messages = [];
	$updated  = false;

	// @todo Get pledge ID from somewhere.
	$data = PledgeMeta\get_pledge_meta();

	if ( 'Update Pledge' === $action ) {
		$processed = process_form_manage();

		if ( is_wp_error( $processed ) ) {
			$messages = array_merge( $messages, $processed->get_error_messages() );
		} elseif ( 'success' === $processed ) {
			$updated = true;
		}
	}

	ob_start();
	$readonly = false;
	require FiveForTheFuture\PATH . 'views/form-pledge-manage.php';

	return ob_get_clean();
}

/**
 * Process a submission from the Manage Existing Pledge form.
 *
 * @return string|WP_Error String "success" if the form processed correctly. Otherwise WP_Error.
 */
function process_form_manage() {
	$submission = filter_input_array( INPUT_POST, PledgeMeta\get_input_filters() );

	$has_required = PledgeMeta\has_required_pledge_meta( $submission );

	if ( is_wp_error( $has_required ) ) {
		return $has_required;
	}

	$email = sanitize_meta(
		PledgeMeta\META_PREFIX . 'org-pledge-email',
		$submission['org-pledge-email'],
		'post',
		Pledge\CPT_ID
	);

	if ( has_existing_pledge( $email, 'email' ) ) {
		return new WP_Error(
			'existing_pledge_email',
			__( 'This email address is already connected to an existing pledge.', 'wporg' )
		);
	}

	$domain = PledgeMeta\get_normalized_domain_from_url( $submission['org-url'] );

	if ( has_existing_pledge( $domain, 'domain' ) ) {
		return new WP_Error(
			'existing_pledge',
			__( 'A pledge already exists for this domain.', 'wporg' )
		);
	}
}

/**
 * Check a key value against existing pledges to see if one already exists.
 *
 * @param string $key               The value to match against other pledges.
 * @param string $key_type          The type of value being matched. `email` or `domain`.
 * @param int    $current_pledge_id Optional. The post ID of the pledge to compare against others.
 *
 * @return bool
 */
function has_existing_pledge( $key, $key_type, int $current_pledge_id = 0 ) {
	$args = array(
		'post_type'   => Pledge\CPT_ID,
		'post_status' => array( 'pending', 'publish' ),
	);

	switch ( $key_type ) {
		case 'email':
			$args['meta_query'] = array(
				array(
					'key'   => PledgeMeta\META_PREFIX . 'org-pledge-email',
					'value' => $key,
				),
			);
			break;
		case 'domain':
			$args['meta_query'] = array(
				array(
					'key'   => PledgeMeta\META_PREFIX . 'org-domain',
					'value' => $key,
				),
			);
			break;
	}

	if ( $current_pledge_id ) {
		$args['exclude'] = array( $current_pledge_id );
	}

	$matching_pledge = get_posts( $args );

	return ! empty( $matching_pledge );
}

/**
 *
 *
 * @param string $name The name of the company to use as the post title.
 *
 * @return int|WP_Error Post ID on success. Otherwise WP_Error.
 */
function create_new_pledge( $name ) {
	$args = [
		'post_type'   => Pledge\CPT_ID,
		'post_title'  => $name,
		'post_status' => 'draft',
	];

	return wp_insert_post( $args, true );
}