index.php

<?php

/**
 * @package Payment Processor
 * @version 1.0
 */
/*
Plugin Name: Payment Processor Library
Plugin URI: http://freesites.com/
Description: Payment Processor for WordPress sites, providing payment processor settings to other WordPress plugins.
Author: Aria Stewart
Version: 1.0
*/

	define('PAYMENT_PROCESSOR', true);

	class PaymentRequest {
		var $amount;
		var $address;
		var $name;
		var $email;
		var $success;
		public function PaymentRequest() {
			$this->success = false;
		}
	}

	require(dirname(__FILE__)."/fake.php");
	
	abstract class PaymentProcessor {
		public static function name() {
			return preg_replace('/([a-z])([A-Z])/', '\1 \2', get_called_class());
		}

		public static function slug() {
			return strtolower(get_called_class());
		}

		public function process($request, $returnURL) {
			if(!$this->enabled) wp_die("This processor is not enabled");
			do_action('payment_processed', $request);
			do_action('payment_processed-'.$this->slug(), $request);
			if($request->success) {
				wp_redirect($returnURL);
			} else {
				wp_die("There was a problem processing your payment.");
			}
		}

		private static $processors = array();

		public static function getProcessors() {
			return self::$processors;
		}

		public static function getEnabledProcessors() {
			$procs = array();
			foreach(self::getProcessors() as $p) {
				if($p->enabled()) $procs[] = $p;
			}
			return $procs;
		}

		public static function addProcessor($p) {
			self::$processors[$p->slug()] = $p;
		}

		public static function getProcessor($slug) {
			return self::$processors[$slug];
		}

		protected $enabled = false;
		public function enable() { $this->enabled = true; }
		public function disable() { $this->enabled = false; }
		public function enabled() { return $this->enabled; }

	}

	add_action(is_multisite()?'network_admin_init':'admin_init', function() {
		foreach(PaymentProcessor::getProcessors() as $p) {
			$sprefix = "payment_processor_".$p->slug();
			register_setting('payment_processor_options', "payment_processor_{$p->slug()}_enabled", 'boolval');
			add_settings_section("{$sprefix}_section", "Settings for {$p->name()}", function() { }, __FILE__);
			add_settings_field( "payment_processor_{$p->slug()}_enabled", "Enabled", function() use (&$p, $sprefix) {
				echo "<input type='checkbox' name='{$sprefix}_enabled' value='1' class='code' ".checked(1, get_site_option("{$sprefix}_enabled"), false)." > Enable this processor";
			}, __FILE__, $sprefix."_section");
		}
	});

	function boolval($v) {
		return (boolean)$v;
	}

	add_action(is_multisite()? 'network_admin_menu':'admin_menu', function() {
		add_submenu_page(is_multisite() ? 'settings.php' : 'options-general.php', 'Payment Processor Options', 'Payment Processors', 'manage_options', __FILE__, function() { 
			if($_SERVER['REQUEST_METHOD'] == 'POST') {
				update_site_option('payment_processor_fake_enabled', boolval(@$_POST['payment_processor_fake_enabled']));
				wp_redirect("settings.php?page=payment-processor/index.php&updated=true");
			} else { ?>
				<div class='wrap'>
				<?php if(@$_GET['updated']) echo "Settings updated."; ?>
				<h2>Payment Processors</h2>
				<p>Configure payment processor settings.</p>
				<form action="" method="post">
					<?php foreach(PaymentProcessor::getProcessors() as $p) {
						$slug = $p->slug();
						$id = "payment_processor_{$slug}_enabled";
						echo "<input type='checkbox' id='$id' name='$id' value='1' ";
						checked(get_site_option("payment_processor_{$slug}_enabled"));
						echo "><label for='$id'>{$p->name()}</label>";
					} ?>
					<input name="Submit" type="submit" value="<?php esc_attr_e('Save Changes'); ?>" />
				</form>
				</div>
			<?php }
		});
	});


?>