<?php

function fulcrm_shoppingcart_permission() {
  return array( 'administer fulcrm shoppingcart' => array( 'title' => t('Administer fulcrm shopping cart'),
                                                           'description' => t('Perform main installation/administration tasks for fulcrm shopping cart.'),
                                                           ),                          
                );
}

function hook_fulcrm_shoppingcart_alter_person_add( $person ) {
}

function fulcrm_shoppingcart_fulcrm_shoppingcart_alter_person_add( $person ) {
    return $person;
}

function hook_fulcrm_shoppingcart_person_add( $person, $redirect_destination ) {
}

function hook_fulcrm_shoppingcart_person_add_guest( $person, $redirect_destination ) {
}

function hook_fulcrm_shoppingcart_pre_add_to_cart( $shoppingcart, $person, $product ) {
}

function hook_fulcrm_shoppingcart_post_add_to_cart( $shoppingcart, $shoppingitem ) {
}

function hook_fulcrm_shoppingcart_pre_remove_from_cart( $shoppingcart, $shoppingitem ) {
}

function hook_fulcrm_shoppingcart_post_remove_from_cart( $shoppingcart, $product ) {
}

function hook_fulcrm_shoppingcart_pre_cart_to_transaction( $shoppingcart ) {
}

function hook_fulcrm_shoppingcart_post_cart_to_transaction( $transaction ) {
}

function hook_fulcrm_shoppingcart_transaction_success( $transaction ) {
}

function hook_fulcrm_shoppingcart_transaction_failure( $transaction ) {
}

function fulcrm_shoppingcart_block_info() {
    $blocks[ 'donate' ] = array( 'info' => t('Make a Donation'),
                                 'cache' => DRUPAL_CACHE_GLOBAL,
                                 );
    return $blocks;
}

function fulcrm_shoppingcart_block_view( $delta = '' ) {
    $block = array();

    if ( $delta == 'donate' ) {
        if ( variable_get( 'fulcrm_shoppingcart_donations', false ) ) {
            $solicited_product_id = variable_get( 'fulcrm_shoppingcart_donation_solicited_product', 0 );
            if ( $solicited_product_id > 0 ) {
                $person = array();

                $product_data = fulcrm_apiv2_GET( 'product/' . $solicited_product_id . '/',
                                                  $query = array( 'expand' => implode( ',', array( 'content_object',
                                                                                                   'selector_object',
                                                                                                   'person_ddatacollection',
                                                                                                   'organisation_ddatacollection',
                                                                                                   'thing_ddatacollection',
                                                                                                   'transaction_ddatacollection',
                                                                                                   'lineitem_ddatacollection',
                                                                                                   ) ) ) );
                $block[ 'subject' ] = t('Make a Donation');
                if ( $product_data[ 'success' ] ) {
                    $block[ 'content' ] = drupal_get_form( 'fulcrm_shoppingcart_buy_donation_form', $person, $product_data[ 'data' ] );
                } else {
                    $block[ 'content' ] = 'There was a problem loading the product to make a donation.';
                }
            }
        }
    }

    return $block;
}

function fulcrm_shoppingcart_menu() {
    /*
    $items[ 'admin/config/services/fulcrm' ] = array( 'page callback' => 'system_admin_menu_block_page',
                                                      'file' => 'system.admin.inc',
                                                      'file path' => drupal_get_path('module', 'system'),
                                                      'title' => 'fulcrm',
                                                      'description' => 'Configuration integration with fulcrm.org.',
                                                      'position' => 'right',
                                                      'access callback' => 'user_access',
                                                      'access arguments' => array('access administration pages'),
                                                      );
   */
    $items[ 'admin/config/services/fulcrm/shoppingcart' ] = array( 'page callback' => 'fulcrm_shoppingcart_admin',
                                                                   'file' => 'fulcrm_shoppingcart.admin.inc',
                                                                   'title' => 'fulcrm Shopping Cart',
                                                                   'description' => 'Configure Shopping Cart for fulcrm.org.',
                                                                   'access callback' => 'user_access',
                                                                   'access arguments' => array('administer fulcrm shoppingcart'),
                                                                   );

    $items[ 'fulcrm/buy/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_buy',
                                        'page arguments' => array(2,3),
                                        'type' => MENU_CALLBACK,
                                        'access callback' => 'user_access',
                                        'access arguments' => array('access content'),
                                        );
    $items[ 'fulcrm/cart/remove/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_remove',
                                                'page arguments' => array(3,4),
                                                'type' => MENU_CALLBACK,
                                                'access callback' => 'user_access',
                                                'access arguments' => array('access content'),
                                                );
    $items[ 'fulcrm/cart' ] = array( 'page callback' => 'fulcrm_shoppingcart_cart',
                                     'type' => MENU_CALLBACK,
                                     'access callback' => 'user_access',
                                     'access arguments' => array('access content'),
                                     );
    $items[ 'fulcrm/donate' ] = array( 'page callback' => 'fulcrm_shoppingcart_donate',
                                       'type' => MENU_CALLBACK,
                                       'access callback' => 'user_access',
                                       'access arguments' => array('access content'),
                                       );
    $items[ 'fulcrm/checkout' ] = array( 'page callback' => 'fulcrm_shoppingcart_checkout',
                                         'type' => MENU_CALLBACK,
                                         'access callback' => 'user_access',
                                         'access arguments' => array('access content'),
                                         );
    $items[ 'fulcrm/checkout/coupon/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_coupon',
                                                    'page arguments' => array(3,4),
                                                    'type' => MENU_CALLBACK,
                                                    'access callback' => 'user_access',
                                                    'access arguments' => array('access content'),
                                                    );
    $items[ 'fulcrm/checkout/success/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_checkout_success',
                                                     'page arguments' => array(3,4),
                                                     'type' => MENU_CALLBACK,
                                                     'access callback' => 'user_access',
                                                     'access arguments' => array('access content'),
                                                     );
    $items[ 'fulcrm/checkout/failure/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_checkout_failure',
                                                     'page arguments' => array(3,4),
                                                     'type' => MENU_CALLBACK,
                                                     'access callback' => 'user_access',
                                                     'access arguments' => array('access content'),
                                                     );
    $items[ 'fulcrm/cart/person/add/%/%' ] = array( 'page callback' => 'fulcrm_shoppingcart_person_add',
                                                    'page arguments' => array(4,5),
                                                    'type' => MENU_CALLBACK,
                                                    'access callback' => 'user_access',
                                                    'access arguments' => array('access content'),
                                                    );

    return $items;
}

function fulcrm_shoppingcart_theme( $existing, $type, $theme, $path ) {
    return array( 'fulcrm_shoppingcart_cart' => array( 'variables' => array( 'shoppingcart' => null ), // data returned from fulcrm API
                                                       'template' => 'fulcrm_shoppingcart_cart',
                                                        ),
                  'fulcrm_shoppingcart_cart_items' => array( 'variables' => array( 'shoppingitems' => null ), // data returned from fulcrm API
                                                             'template' => 'fulcrm_shoppingcart_cart_items',
                                                             ),
                  'fulcrm_shoppingcart_cart_item' => array( 'variables' => array( 'shoppingitem' => null ), // data returned from fulcrm API
                                                            'template' => 'fulcrm_shoppingcart_cart_item',
                                                            ),
                  'fulcrm_shoppingcart_transaction_checkout' => array( 'variables' => array( 'transaction' => null, 'use_coupon_url' => null ), // data returned from fulcrm API
                                                                       'template' => 'fulcrm_shoppingcart_transaction_checkout',
                                                                        ),
                  'fulcrm_shoppingcart_transaction_items' => array( 'variables' => array( 'items' => null ), // data returned from fulcrm API
                                                                    'template' => 'fulcrm_shoppingcart_transaction_items',
                                                                     ),
                  'fulcrm_shoppingcart_transaction_item' => array( 'variables' => array( 'item' => null ), // data returned from fulcrm API
                                                                   'template' => 'fulcrm_shoppingcart_transaction_item',
                                                                    ),
                  'fulcrm_shoppingcart_transaction_payment' => array( 'variables' => array( 'item' => null ), // data returned from fulcrm API
                                                                      'template' => 'fulcrm_shoppingcart_transaction_payment',
                                                                      ),
                  'fulcrm_shoppingcart_transaction_complete' => array( 'variables' => array( 'transaction' => null ), // data returned from fulcrm API
                                                                       'template' => 'fulcrm_shoppingcart_transaction_complete',
                                                                        ),
                  'fulcrm_shoppingcart_transaction_incomplete' => array( 'variables' => array( 'transaction' => null ), // data returned from fulcrm API
                                                                         'template' => 'fulcrm_shoppingcart_transaction_incomplete',
                                                                          ),
                  'fulcrm_shoppingcart_transaction_mailshots' => array( 'variables' => array( 'transaction' => null ), // data returned from fulcrm API
                                                                        'template' => 'fulcrm_shoppingcart_transaction_mailshots',
                                                                        ),
                  'fulcrm_shoppingcart_transaction_mailshot' => array( 'variables' => array( 'mailshot' => null ), // data returned from fulcrm API
                                                                       'template' => 'fulcrm_shoppingcart_transaction_mailshot',
                                                                       ),
                  'fulcrm_shoppingcart_buy_eventbookingtype' =>  array( 'variables' => array( 'user_login_form' => null, 'fulcrm_shoppingcart_buy_eventbookingtype_form' => null ), // data returned from fulcrm API
                                                                        'template' => 'fulcrm_shoppingcart_buy_eventbookingtype',
                                                                        ),
                  'fulcrm_shoppingcart_buy_donation_page' => array( 'variables' => array( 'product' => null, 'fulcrm_shoppingcart_buy_donation_form' => null ), // data returned from fulcrm API
                                                                    'template' => 'fulcrm_shoppingcart_buy_donation_page',
                                                                    ),
                  );
}

function fulcrm_shoppingcart_invalidate_cache( $cart_id = NULL ) {
    if ( is_null( $cart_id ) ) {
        if ( array_key_exists( 'fulcrm_shoppingcart_id', $_SESSION ) )
            $cart_id = $_SESSION[ 'fulcrm_shoppingcart_id' ];
    }
    if ( $cart_id === '*' ) {
        cache_clear_all( $cid = 'fulcrm_shoppingcart:shoppingcart:', $bin = 'cache', $wildcard = TRUE );
    } else if ( !is_null( $cart_id ) ) {
        $cid = 'fulcrm_shoppingcart:shoppingcart:' . $cart_id;
        cache_clear_all( $cid = $cid, $bin = 'cache' );
    }
}

function fulcrm_shoppingcart_get_session_cart( $create = true ) {
    global $user;

    drupal_session_start();

    if ( array_key_exists( 'fulcrm_shoppingcart_id', $_SESSION ) ) {
        $cid = 'fulcrm_shoppingcart:shoppingcart:' . $_SESSION[ 'fulcrm_shoppingcart_id' ];

        if ( $cached = cache_get( $cid, 'cache' ) ) {
            return $cached->data;
        }

        $api_data = fulcrm_apiv2_GET( 'shoppingcart/' . $_SESSION[ 'fulcrm_shoppingcart_id' ] . '/',
                                      $query = array( 'expand' => implode( ',', array( 'd',
                                                                                       'shoppingitems',
                                                                                       'shoppingitems.d',
                                                                                       'shoppingitems.content_object',
                                                                                       'shoppingitems.product' ) ) ) );
        if ( $api_data[ 'success' ] ) {
            if ( ( $api_data[ 'data' ][ 'completed' ] === null ) && ( $api_data[ 'data' ][ 'abandoned' ] === null ) ) {
                cache_set( $cid, $api_data[ 'data' ], $bin = 'cache', $expire = time() + 300 );
                return $api_data[ 'data' ];
            } else {
                unset( $_SESSION[ 'fulcrm_shoppingcart_id' ] );
            }
        } else {
            if ( $api_data[ 'code' ] === 404 ) {
                unset( $_SESSION[ 'fulcrm_shoppingcart_id' ] );
            }
        }
    }

    if ( $create ) {
        $person_url = null;
        if ( !user_is_anonymous() ) {
            $person_id = fulcrm_webhook_get_pk_for_entity_type( 'user', $user->uid, 'person' );

            if ( $person_id )
                $person_url = fulcrm_apiv2_make_url( 'person', $person_id );
        }

        $cart_data = array( 'person' => $person_url, 'd' => array( 'fulcrm_testing_data' => 'this is a test' ) );

        $api_data = fulcrm_apiv2_POST( 'shoppingcart/', $cart_data, $query = array( 'expand' => 'd' ) );
        if ( $api_data[ 'success' ] ) {
            $_SESSION[ 'fulcrm_shoppingcart_id' ] = $api_data[ 'data' ][ 'id' ];
            $cid = 'fulcrm_shoppingcart:shoppingcart:' . $api_data[ 'data' ][ 'id' ];
            cache_set( $cid, $api_data[ 'data' ], $bin = 'cache', $expire = time() + 300 );
            return $api_data[ 'data' ];
        }
    }
}

function fulcrm_shoppingcart_session_cart_count_items() {
    if ( $cart_data = fulcrm_shoppingcart_get_session_cart(false) )
        return count( $cart_data[ 'shoppingitems' ] );
    return 0;
}

function fulcrm_shoppingcart_coupon_url( $transaction_id ) {
    $hmac = fulcrm_crypto_object_id_hmac( 'transaction', $transaction_id );
    return url( 'fulcrm/checkout/coupon/' . $transaction_id . '/' . $hmac );
}

function fulcrm_shoppingcart_buy_url( $product_id ) {
    $hmac = fulcrm_crypto_object_id_hmac( 'product', $product_id );
    return url( 'fulcrm/buy/' . $product_id . '/' . $hmac );
}

function fulcrm_shoppingcart_remove_url( $shoppingitem_id ) {
    $hmac = fulcrm_crypto_object_id_hmac( 'shoppingitem', $shoppingitem_id );
    return url( 'fulcrm/cart/remove/' . $shoppingitem_id . '/' . $hmac );
}

function _fulcrm_shoppingcart_person_add_form_submit_to_data( $form, &$form_state ) {
    $person_d = fulcrm_collection_form_values_to_d( 'person', $form_state[ 'values' ] );
    $person_d[ 'uuid' ] = fulcrm_uuid_uuid4();
    return $person_d;
}

function fulcrm_shoppingcart_person_add_form_submit( $form, &$form_state ) {
    $person_d = _fulcrm_shoppingcart_person_add_form_submit_to_data( $form, $form_state );
    $person_d = module_invoke_all( 'fulcrm_shoppingcart_alter_person_add', $person_d );

    $uuid = $person_d[ 'uuid' ];
    unset( $person_d[ 'uuid' ] );
    $person_data = array( 'd' => $person_d, 'uuid' => $uuid, 'name' => 'unnamed person' );

    if ( array_key_exists( 'name', $person_d ) ) {
        if ( is_array( $person_d[ 'name' ] ) )
            $person_data[ 'name' ] = $person_d[ 'name' ][ 0 ];
        elseif ( is_string( $person_d[ 'name' ] ) )
            $person_data[ 'name' ] = $person_d[ 'name' ];
    }

    $api_data = fulcrm_apiv2_POST( 'person/', $person_data, $query = array( 'expand' => 'd' ) );
    if ( $api_data[ 'success' ] ) {
        module_invoke_all( 'fulcrm_shoppingcart_person_add', $api_data[ 'data' ], array_key_exists( 'destination', $_GET ) ? $_GET[ 'destination' ] : variable_get( 'fulcrm_shoppingcart_proceed_url', url('<front>') ) );
    }
}

function fulcrm_shoppingcart_person_add_guest_form_submit( $form, &$form_state ) {
    $person_d = _fulcrm_shoppingcart_person_add_form_submit_to_data( $form, $form_state );
    $person_d = module_invoke_all( 'fulcrm_shoppingcart_alter_person_add', $person_d );

    $cart = fulcrm_shoppingcart_get_session_cart();
    if ( $cart[ 'url' ] ) {
        $cart[ 'd' ][ 'fulcrm' ][ 'person' ][ $person_d[ 'uuid' ] ] = $person_d;
        if ( !array_key_exists( 'transaction', $cart[ 'd' ][ 'fulcrm' ] ) ||
             !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ] ) ||
             is_null( $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] ) ) {
            $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] = $person_d[ 'uuid' ];
        }

        $api_data = fulcrm_apiv2_PATCH( $cart[ 'url' ], array( 'd' => $cart[ 'd' ] ),
                                        $query = array( 'expand' => implode( ',', array( 'd',
                                                                                         'shoppingitems',
                                                                                         'shoppingitems.d',
                                                                                         'shoppingitems.content_object',
                                                                                         'shoppingitems.product' ) ) ) );
        if ( $api_data[ 'success' ] ) {
            module_invoke_all( 'fulcrm_shoppingcart_person_add', $api_data[ 'data' ], array_key_exists( 'destination', $_GET ) ? $_GET[ 'destination' ] : variable_get( 'fulcrm_shoppingcart_proceed_url', url('<front>') ) );

            $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] = $person_d;
            $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingcart' ] = $api_data[ 'data' ];
        } else {
            drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
        }
    } else {
        drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
    }
}

function fulcrm_shoppingcart_person_add_form( $form, &$form_state, $collection, $destination ) {
    $form_state[ 'fulcrm_shoppingcart' ][ 'collection' ] = $collection;
    $form[ 'title_event' ] = array( '#type' => 'markup',
                                    '#markup' => '<h1>Add a Person</h1>',
                                    );

    $form[ 'person' ] = fulcrm_collection_to_form( 'person', $collection, array() );
    $form[ 'destination' ] = array( '#type' => 'hidden',
                                    '#default_value' => $destination,
                                    );

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'submit' ] = array( '#type' => 'submit',
                                            '#value' => t('Add Person'),
                                            '#submit' => array( 'fulcrm_shoppingcart_person_add_form_submit' ),
                                            );

    return $form;
}

function fulcrm_shoppingcart_person_add( $collection_id, $hmac ) {
    if ( fulcrm_crypto_check_object_id_hmac( 'collection', $collection_id, $hmac ) ) {

        $collection_data = fulcrm_apiv2_GET( 'ddatacollection/' . $collection_id . '/' );
        if ( $collection_data[ 'success' ] ) 
            return drupal_get_form( 'fulcrm_shoppingcart_person_add_form', $collection_data[ 'data' ], array_key_exists( 'destination', $_GET ) ? $_GET[ 'destination' ] : variable_get( 'fulcrm_shoppingcart_proceed_url', url('<front>') ) );
    }
}

function _fulcrm_shoppingcart_buy_donation_create_shoppingitem( &$form_state, &$cart, $donation_for_shoppingitem ) {
    if ( variable_get( 'fulcrm_shoppingcart_donations', false ) ) {
        $donation_amount = floatval( $form_state[ 'values' ][ 'donation_amount' ] );

        if ( $donation_amount < 0.0 )
            drupal_set_message(t('A negative donation would rather defeat the point!'), 'error', FALSE);
        if ( $donation_amount <= 0.0 )
            return;

        $cart_product_id = variable_get( 'fulcrm_shoppingcart_donation_cart_product', 0 );
        if ( $cart_product_id > 0 ) {
            $name = 'Donation of ' . sprintf( '%.2f', $donation_amount ) . ' for "' . $donation_for_shoppingitem[ 'd' ][ 'name' ] . '"';
            $item = array( 'shoppingcart' => $cart[ 'url' ],
                           'product' => fulcrm_apiv2_make_url( 'product', $cart_product_id ),
                           'quantity' => 1.0,
                           'item' => 'donation',
                           'item_net' => $donation_amount,
                           'content_object' => $donation_for_shoppingitem[ 'url' ],
                           'd' => array( 'name' => $name ),
                           );

            $api_data = fulcrm_apiv2_POST( 'shoppingitem/', $item, $query = array( 'expand' => 'd' ) );
            fulcrm_shoppingcart_invalidate_cache();
            if ( $api_data[ 'success' ] ) {
                $hook_results = module_invoke_all( 'fulcrm_shoppingcart_post_add_to_cart', $cart, $api_data[ 'data' ] );
                foreach ( $hook_results as $hook_result )
                    return $hook_result;

                drupal_set_message( t('Added "%item" to shopping cart.', array( '%item' => $item[ 'd' ][ 'name' ] ) ), 'status' );
            } else {
                drupal_set_message( t('There was a problem adding your donation to the shopping cart.'), 'error' );
            }
        }
    }
}

function _fulcrm_shoppingcart_buy_eventbookingtype_create_shoppingitem( &$form_state, $cart, $person_uuid, $person_name, $product_id, $made_choices = array() ) {
    $all_choices = array();

    $shoppingitem_name = ( $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'event' ][ 'name' ] . "\r\n" .
                           $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'name' ] . ', ' . $person_name . "\r\n" .
                           $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'name' ] );

    $eventslotbookings = array();
    if ( array_key_exists( 'eventbookingtypeslots', $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ] ) ) {
        foreach ( $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'eventbookingtypeslots' ] as $eventbookingtypeslots ) {
            $eventpart_id = fulcrm_apiv2_url_to_pk( $eventbookingtypeslots[ 'eventslot' ][ 'eventpart' ] );
            $eventslot_id = fulcrm_apiv2_url_to_pk( $eventbookingtypeslots[ 'eventslot' ][ 'url' ] );
            $eventslotbookings[ $eventpart_id ] = $made_choices[ $eventpart_id ];
        }
    } else {
        drupal_set_message( 'XXX no eventbookingtypeslots to choose from?', 'warning' );
    }

    if ( $person_uuid ) {
        $item = array( 'shoppingcart' => $cart[ 'url' ],
                       'product' => fulcrm_apiv2_make_url( 'product', $product_id ),
                       'quantity' => 1.0,
                       'd' => array( 'fulcrm' => array( 'eventbooking' => array( 'eventbooking' => array(),
                                                                                 'eventslotbookings' => $eventslotbookings,
                                                                                 'person' => $person_uuid,
                                                                                 ),
                                                        ),
                                     'name' => $shoppingitem_name,
                                     ),
                       );

        if ( $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'eventbooking_ddatacollection' ] ) {
            $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ '_drupal_gather' ][ '_structure' ] = $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'eventbooking_ddatacollection' ][ '_structure' ];
            $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ '_drupal_gather' ][ 's' ] = $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ][ 'eventbooking_ddatacollection' ][ 's' ];
        }

        $api_data = fulcrm_apiv2_POST( 'shoppingitem/', $item, $query = array( 'expand' => 'd' ) );
        fulcrm_shoppingcart_invalidate_cache();
        if ( $api_data[ 'success' ] ) {
            $hook_results = module_invoke_all( 'fulcrm_shoppingcart_post_add_to_cart', $cart, $api_data[ 'data' ] );
            foreach ( $hook_results as $hook_result )
                return $hook_result;

            drupal_set_message( t('Added "%item" to shopping cart.', array( '%item' => $item[ 'd' ][ 'name' ] ) ), 'status' );
            $form_state[ 'redirect' ] = 'fulcrm/cart';
            _fulcrm_shoppingcart_buy_donation_create_shoppingitem( $form_state, $cart, $api_data[ 'data' ] );
        } else {
            drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
        }
    } else {
        drupal_set_message( t('Cannot find your record\'s UUID. This order might have problems...'), 'error' );
    }
}

function fulcrm_shoppingcart_buy_eventbookingtype_form_submit( $form, &$form_state ) {
    // $person_d = fulcrm_collection_form_values_to_d( 'person', $form_state[ 'values' ] );

    $product_id = $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'id' ];
    $eventbookingtype = $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ];
    $eventbookingtype_id = $eventbookingtype[ 'id' ];
    $event = $eventbookingtype[ 'event' ];

    $person_uuid = NULL;
    if ( array_key_exists( 'uuid', $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] ) )
        $person_uuid = $form_state[ 'fulcrm_shoppingcart' ][ 'person' ][ 'uuid' ];

    $cart = fulcrm_shoppingcart_get_session_cart();

    if ( $cart ) {
        if ( !$person_uuid ) {
            if ( array_key_exists( 'd', $cart ) &&
                 array_key_exists( 'fulcrm', $cart[ 'd' ] ) &&
                 array_key_exists( 'transaction', $cart[ 'd' ][ 'fulcrm' ] ) &&
                 array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ] )
                 ) {
                $person_uuid = $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ];
            }
        }
        if ( $person_uuid ) {
            $patch = FALSE;
            if ( !array_key_exists( 'fulcrm', $cart[ 'd' ] ) ||
                 !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ] ) ||
                 !array_key_exists( $person_uuid, $cart[ 'd' ][ 'fulcrm' ][ 'person' ] ) ) {
                $cart[ 'd' ][ 'fulcrm' ][ 'person' ][ $person_uuid ] = array( 'uuid' => $person_uuid );
                $patch = TRUE;
            }
            if ( !array_key_exists( 'transaction', $cart[ 'd' ][ 'fulcrm' ] ) ||
                 !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ] ) ||
                 is_null( $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] ) ) {
                $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] = $person_uuid;
                $patch = TRUE;
            }
            if ( $patch ) {
                $api_data = fulcrm_apiv2_PATCH( $cart[ 'url' ], array( 'd' => $cart[ 'd' ] ),
                                                $query = array( 'expand' => 'd' ) );
                if ( $api_data[ 'success' ] ) {
                    $cart = $api_data[ 'data' ];
                } else {
                    drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
                }
                fulcrm_shoppingcart_invalidate_cache();
            }
        }

        $made_choices = array();
        foreach ( $event[ 'eventparts' ] as $eventpart ) {
            $key = 'eventpart:' . $eventpart[ 'id' ];
            if ( array_key_exists( $key, $form_state[ 'values' ] ) ) {
                $choice = fulcrm_crypto_get_object_id_form_value( 'eventslot.id', $form_state[ 'values' ][ $key ] );
                if ( $choice )
                    $made_choices[ $eventpart[ 'id' ] ] = $choice;
            }
        }

        if ( array_key_exists( 'ticket_for_persons', $form_state[ 'values' ] ) ) {
            $ticket_for_persons = $form_state[ 'values' ][ 'ticket_for_persons' ];
            if ( !is_array( $ticket_for_persons ) )
                $ticket_for_persons = array( $ticket_for_persons => 1 );
            foreach ( $ticket_for_persons as $ticket_for_person => $add ) {
                if ( $add ) {
                    $add_person_name = 'unnamed person';
                    if ( $ticket_for_person === 'myself' ) {
                        $add_person_uuid = $form_state[ 'fulcrm_shoppingcart' ][ 'person' ][ 'uuid' ];
                        $add_person_name = $form_state[ 'fulcrm_shoppingcart' ][ 'person' ][ 'name' ];
                    } else {
                        $add_person_uuid = fulcrm_crypto_get_object_id_form_value( 'person.uuid', $ticket_for_person );
                        if ( $add_person_uuid )
                            $add_person_name = $form_state[ 'fulcrm_shoppingcart' ][ 'persons' ][ $add_person_uuid ][ 'name' ];
                    }

                    if ( $add_person_uuid )
                        _fulcrm_shoppingcart_buy_eventbookingtype_create_shoppingitem( $form_state, $cart,
                                                                                       $add_person_uuid, $add_person_name, $product_id,
                                                                                       $made_choices = $made_choices );
                }
            }
        } else {
            if ( $person_uuid ) {
                $person = $cart[ 'd' ][ 'fulcrm' ][ 'person' ][ $person_uuid ];
                _fulcrm_shoppingcart_buy_eventbookingtype_create_shoppingitem( $form_state, $cart,
                                                                               $person_uuid, $person[ 'name' ], $product_id,
                                                                               $made_choices = $made_choices );
            }
        }

        if ( !empty( $ac ) ) {
            drupal_set_message( t('Choices to make...'), 'warning' );
        }

    } else {
        drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
    }
}

function fulcrm_shoppingcart_buy_eventbookingtype_person_add_guest_form_submit( $form, &$form_state ) {
    fulcrm_shoppingcart_person_add_guest_form_submit( $form, $form_state );
    if ( array_key_exists( 'person', $form_state[ 'fulcrm_shoppingcart' ] ) ) {
        fulcrm_shoppingcart_buy_eventbookingtype_form_submit( $form, $form_state );        
    } else {
        drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
    }
}

function fulcrm_shoppingcart_event_has_capacity( $event_id ) {
    $capacity = null;
    $count = null;
    $api_data = fulcrm_apiv2_GET( 'event/' . $event_id . '/' );
    if ( $api_data[ 'success' ] )
        $capacity = $api_data[ 'data' ][ 'capacity' ];

    $api_data = fulcrm_apiv2_GET( 'eventbooking/', $query = array( 'event' => $event_id,
                                                                   'confirmed__isnull' => 'False',
                                                                   'cancelled__isnull' => 'True',
                                                                   ) );
    if ( $api_data[ 'success' ] )
        $count = $api_data[ 'data' ][ 'count' ];

    if ( !is_null( $capacity ) && !is_null( $count ) ) {
        if ( $count >= $capacity )
            return FALSE;
    }
    return TRUE;
}

function _fulcrm_shoppingcart_buy_donation_product_update_form( &$form, &$form_state, $donation_product_id ) {
    if ( ( $donation_product_id > 0 ) && variable_get( 'fulcrm_shoppingcart_donations', false ) ) {
        $product_data = fulcrm_apiv2_GET( 'product/' . $donation_product_id . '/',
                                          $query = array( 'expand' => implode( ',', array( 'content_object',
                                                                                           'selector_object',
                                                                                           'person_ddatacollection',
                                                                                           'organisation_ddatacollection',
                                                                                           'thing_ddatacollection',
                                                                                           'transaction_ddatacollection',
                                                                                           'lineitem_ddatacollection',
                                                                                           ) ) ) );

        if ( $product_data[ 'success' ] ) {
            $product = $product_data[ 'data' ] ;

            $form[ 'donation' ] = array( '#type' => 'fieldset',
                                         '#title' => 'Donation',
                                         );
            $form[ 'donation' ][ 'donation_amount' ] = array( '#type' => 'textfield',
                                                              '#title' => 'Amount (' . $product[ '_price' ][ 'currency' ] . ')',
                                                              '#default_value' => sprintf( "%.2f", $product[ '_price' ][ 'item_net' ] ),
                                                              );
        }
    }
}

function fulcrm_shoppingcart_buy_eventbookingtype_form( $form, &$form_state, $person, $eventbookingtype, $product ) {
    $form = array();

    $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] = $person;
    $form_state[ 'fulcrm_shoppingcart' ][ 'eventbookingtype' ] = $eventbookingtype;
    $form_state[ 'fulcrm_shoppingcart' ][ 'product' ] = $product;

    $form[ 'title_event' ] = array( '#type' => 'markup',
                                    '#markup' => '<h1>' . check_plain( $eventbookingtype[ 'event' ][ 'name' ] ) . '</h1>',
                                    );
    $form[ 'title_eventbookingtype' ] = array( '#type' => 'markup',
                                               '#markup' => '<h2>' . check_plain( $eventbookingtype[ 'name' ] ) . '</h2>',
                                               );
    $form[ 'title_product' ] = array( '#type' => 'markup',
                                      '#markup' => '<h3>' . check_plain( $product[ 'name' ] ) . '</h3>',
                                      );

    drupal_set_title( check_plain( $eventbookingtype[ 'event' ][ 'name' ] ) . ', ' .
                      check_plain( $eventbookingtype[ 'name' ] ) . ', ' .
                      check_plain( $product[ 'name' ] ) );

    // $form[ 'person' ] = fulcrm_collection_to_form( 'person', $eventbookingtype[ 'person_ddatacollection' ], $person[ 'd' ] );

    if ( array_key_exists( 'url', $person ) ) {
        if ( array_key_exists( 'name', $person ) )
            $persons = array( 'myself' => $person[ 'name' ] . ' (myself)' );
        else
            $persons = array( 'myself' => '(myself)' );
    } else {
        $persons = array();
    }

    if ( array_key_exists( 'related_from_person2persons', $person ) ) {
        foreach ( $person[ 'related_from_person2persons' ] as $p2p ) {
            $form_state[ 'fulcrm_shoppingcart' ][ 'persons' ][ $p2p[ 'related_from' ][ 'uuid' ] ] = $p2p[ 'related_from' ];
            $persons[ fulcrm_crypto_object_id_form_value( 'person.uuid', $p2p[ 'related_from' ][ 'uuid' ] ) ] = $p2p[ 'related_from' ][ 'name' ] . ' (your ' . $p2p[ 'relationship' ][ 'name' ] . ')';
        }
    }
    if ( array_key_exists( 'related_to_person2persons', $person ) ) {
        foreach ( $person[ 'related_to_person2persons' ] as $p2p ) {
            $form_state[ 'fulcrm_shoppingcart' ][ 'persons' ][ $p2p[ 'related_to' ][ 'uuid' ] ] = $p2p[ 'related_to' ];
            $persons[ fulcrm_crypto_object_id_form_value( 'person.uuid', $p2p[ 'related_to' ][ 'uuid' ] ) ] = $p2p[ 'related_to' ][ 'name' ] . ' (your ' . $p2p[ 'relationship' ][ 'name' ] . ')';
        }
    }

    if ( $persons ) {
        $form[ 'ticket_for_persons' ] = array( '#type' => 'checkboxes',
                                               '#title' => 'Who is coming to the event? (<a href="' . url( 'fulcrm/cart/person/add/' . $eventbookingtype[ 'person_ddatacollection' ][ 'id' ] . '/' . fulcrm_crypto_object_id_hmac( 'collection', $eventbookingtype[ 'person_ddatacollection' ][ 'id' ] ), $options = array( 'query' => array( 'destination' => fulcrm_shoppingcart_buy_url( $product[ 'id' ] ) ) ) ) . '">add a new person to this list</a>)',
                                               '#description' => 'Tick the box next to each person for whom you want to buy a ticket.',
                                               '#options' => $persons,
                                               );
    } else {
        $form[ 'ticket_for_persons' ] = array( '#options' => array() );
        if ( $eventbookingtype[ 'person_ddatacollection' ] ) {
            $collection_id = $eventbookingtype[ 'person_ddatacollection' ][ 'id' ];
            $collection_data = fulcrm_apiv2_GET( 'ddatacollection/' . $collection_id . '/' );
            if ( $collection_data[ 'success' ] ) {
                $form[ 'new_person' ] = fulcrm_collection_to_form( 'person', $collection_data[ 'data' ], array() );
            }
        }
        $form[ '#submit' ] = 'fulcrm_shoppingcart_buy_eventbookingtype_person_add_guest_form_submit';
    }

    if ( count( $form[ 'ticket_for_persons' ][ '#options' ] ) == 1 ) {
        foreach ( $form[ 'ticket_for_persons' ][ '#options' ] as $k => $v )
            $form[ 'ticket_for_persons' ][ '#default_value' ] = array( $k => $k );
    }

    $form[ 'eventslots' ] = array(); 
    $eventslots = array();
    $eventpart = array();
    foreach ( $eventbookingtype[ 'event' ][ 'eventparts' ] as $eventpart ) {
        $eventparts[ $eventpart[ 'id' ] ] = $eventpart;
        foreach ( $eventpart[ 'eventslots' ] as $eventslot ) {
            $eventslots[ $eventslot[ 'id' ] ] = $eventslot;
        }
    }

    foreach ( $eventbookingtype[ 'eventbookingtypeslots' ] as $ebts ) {
        $eventslot = $ebts[ 'eventslot' ];
        $eventpart_id = fulcrm_apiv2_url_to_pk( $eventslot[ 'eventpart' ] );
        $eventpart_key = 'eventpart:' . $eventpart_id;
        if ( !array_key_exists( $eventpart_key, $form[ 'eventslots' ] ) )
            $form[ 'eventslots' ][ $eventpart_key ] = array( '#type' => 'radios',
                                                             '#title' => $eventparts[ $eventpart_id ][ 'name' ],
                                                             '#options' => array(),
                                                             '#required' => TRUE,
                                                             );
        $eventslot_id = fulcrm_crypto_object_id_form_value( 'eventslot.id', $eventslot[ 'id' ] );
        $remaining_capacity = $eventslot[ '_remaining_capacity' ];
        if ( is_null( $remaining_capacity ) || ( $remaining_capacity > 0 ) )
            $form[ 'eventslots' ][ $eventpart_key ][ '#options' ][ $eventslot_id ] = $eventslot[ 'name' ];
    }

    $choices = false;
    $zero_options = false;
    foreach ( $form[ 'eventslots' ] as $eventpart_id => $eventpart_form ) {
        if ( count( $eventpart_form[ '#options' ] ) == 0 ) {
            $zero_options = true;
        } else if ( count( $eventpart_form[ '#options' ] ) == 1 ) {
            foreach ( $eventpart_form[ '#options' ] as $option_key => $option_value )
                $form[ 'eventslots' ][ $eventpart_id ][ '#default_value' ] = $option_key;
        } else {
            $choices = true;
        }
    }

    if ( $zero_options ) {
        drupal_set_message(t('Unfortunately it looks like some of the choices for this type of ticket are completely sold out.'), 'error', FALSE);
    }

    if ( $choices ) {
        $form[ 'ticket_for_persons' ][ '#type' ] = 'radios';
        if ( count( $form[ 'ticket_for_persons' ][ '#options' ] ) == 1 ) {
            foreach ( $form[ 'ticket_for_persons' ][ '#options' ] as $option_key => $option_value )
                $form[ 'ticket_for_persons' ][ '#default_value' ] = $option_key;
        }
    }

    if ( !$choices && ( variable_get( 'fulcrm_shoppingcart_event_itinerary', 'full' ) === 'elide' ) ) {
        foreach ( $form[ 'eventslots' ] as $eventpart_id => $eventpart_form ) {
            $form[ 'eventslots' ][ $eventpart_id ][ '#value' ] = $form[ 'eventslots' ][ $eventpart_id ][ '#default_value' ];
            $form[ 'eventslots' ][ $eventpart_id ][ '#type' ] = 'hidden';
        }
        $form[ 'eventslots' ][ '#type' ] = 'container';
    } else {
        $form[ 'eventslots' ][ '#title' ] = 'Itinerary';
        $form[ 'eventslots' ][ '#type' ] = 'fieldset';
    }

    _fulcrm_shoppingcart_buy_donation_product_update_form( $form, $form_state, variable_get( 'fulcrm_shoppingcart_donation_cart_product', 0 ) );

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'submit' ] = array( '#type' => 'submit',
                                            '#value' => t('Add to Cart'),
                                            '#submit' => array( 'fulcrm_shoppingcart_buy_eventbookingtype_form_submit' ),
                                            );

    if ( $zero_options ) {
        $form[ 'actions' ][ 'submit' ][ '#disabled' ] = true;
        $form[ 'actions' ][ 'submit' ][ '#value' ] = t('Sold Out');
    }

    return $form;
}

function fulcrm_shoppingcart_buy_eventbookingtype_guest_form( $form, &$form_state, $person, $eventbookingtype, $product ) {
    $form = fulcrm_shoppingcart_buy_eventbookingtype_form( $form, $form_state, $person, $eventbookingtype, $product );
    $form[ 'actions' ][ 'submit' ][ '#submit' ] = array( 'fulcrm_shoppingcart_buy_eventbookingtype_person_add_guest_form_submit' );
    return $form;
}

function fulcrm_shoppingcart_buy_eventbookingtype_login_form_submit( $form, &$form_state ) {
    user_login_submit( $form, $form_state );
    $form_state[ 'redirect' ] = fulcrm_shoppingcart_buy_url( $form_state[ 'fulcrm_shoppingcart' ][ 'redirect_buy_product_id' ] );
}

function fulcrm_shoppingcart_buy_eventbookingtype_login_form( $form, &$form_state, $product_id ) {
    $form = user_login( $form, $form_state );
    $form_state[ 'fulcrm_shoppingcart' ][ 'redirect_buy_product_id' ] = $product_id;
    return $form;
}

function fulcrm_shoppingcart_buy_eventbookingtype( $person, $eventbookingtype, $product ) {
    $event_id = $eventbookingtype[ 'event' ][ 'id' ];
    if ( !fulcrm_shoppingcart_event_has_capacity( $event_id ) ) {
        drupal_set_message( t('Sorry, this event must be sold out.  There are no more tickets available.'), 'error' );
        return '';
    }

   $person_id = NULL;
    if ( array_key_exists( 'id', $person ) )
        $person_id = $person[ 'id' ];

    if ( is_null( $person_id ) ) {
        switch ( variable_get( 'fulcrm_shoppingcart_experience', 'force' ) ) {
        case 'guest':
        case 'user':
            if ( user_is_anonymous() ) {
                $user_login_form = drupal_get_form( 'fulcrm_shoppingcart_buy_eventbookingtype_login_form', $product_id = $product[ 'id' ] );

                $fulcrm_shoppingcart_buy_eventbookingtype_form = drupal_get_form( 'fulcrm_shoppingcart_buy_eventbookingtype_guest_form', $person, $eventbookingtype, $product );

                return theme( 'fulcrm_shoppingcart_buy_eventbookingtype', array( 'fulcrm_shoppingcart_buy_eventbookingtype_form' => $fulcrm_shoppingcart_buy_eventbookingtype_form, 'user_login_form' => $user_login_form ) );
            }
            break;
        case 'force':
            if ( user_is_anonymous() ) {
                drupal_set_message( t('<strong>Sorry</strong>, but you need to be logged in to continue shopping.'), 'error' ); // XXX change to be on form
                $form = user_login( $form, $form_state );
                $form_state[ 'fulcrm_shoppingcart' ][ 'redirect_buy_product_id' ] = $product[ 'id' ];
                $form[ '#submit' ][] = 'fulcrm_shoppingcart_buy_eventbookingtype_login_form_submit';
                return drupal_render( $form );
            } else {
                drupal_set_message( t('Sorry! There was a problem looking up your record, and this means we cannot complete this order.'), 'error' );
            }
            break;
        }
    }

    $form = drupal_get_form( 'fulcrm_shoppingcart_buy_eventbookingtype_form', $person, $eventbookingtype, $product );
    return drupal_render( $form );
}

function fulcrm_shoppingcart_buy_donation_form_submit( $form, &$form_state ) {
    $product_id = $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'id' ];
    $donation_amount = 0.0;
    if ( array_key_exists( 'donation_amount', $form_state[ 'values' ] ) )
        $donation_amount = floatval( $form_state[ 'values' ][ 'donation_amount' ] );

    if ( $donation_amount > 0.0 ) {
        $person_uuid = NULL;
        if ( array_key_exists( 'person', $form_state[ 'fulcrm_shoppingcart' ] ) &&
             array_key_exists( 'uuid', $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] ) )
            $person_uuid = $form_state[ 'fulcrm_shoppingcart' ][ 'person' ][ 'uuid' ];

        $cart = fulcrm_shoppingcart_get_session_cart();

        if ( is_array( $cart ) ) {
            if ( $person_uuid ) {
                $patch = FALSE;
                if ( !array_key_exists( 'fulcrm', $cart[ 'd' ] ) ||
                     !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ] ) ||
                     !array_key_exists( $person_uuid, $cart[ 'd' ][ 'fulcrm' ][ 'person' ] ) ) {
                    $cart[ 'd' ][ 'fulcrm' ][ 'person' ][ $person_uuid ] = array( 'uuid' => $person_uuid );
                    $patch = TRUE;
                }
                if ( !array_key_exists( 'transaction', $cart[ 'd' ][ 'fulcrm' ] ) ||
                     !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ] ) ) {
                    $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] = $person_uuid;
                    $patch = TRUE;
                }
                if ( $patch ) {
                    $api_data = fulcrm_apiv2_PATCH( $cart[ 'url' ], array( 'd' => $cart[ 'd' ] ),
                                                    $query = array( 'expand' => 'd' ) );
                    fulcrm_shoppingcart_invalidate_cache();
                }
            }

            $shoppingitem_name = ( $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'name' ] );

            $item = array( 'shoppingcart' => $cart[ 'url' ],
                           'product' => fulcrm_apiv2_make_url( 'product', $product_id ),
                           'quantity' => 1.0,
                           'item' => 'donation',
                           'item_net' => $donation_amount,
                           'd' => array( 'name' => $shoppingitem_name,
                                         ),
                           );

            $api_data = fulcrm_apiv2_POST( 'shoppingitem/', $item, $query = array( 'expand' => 'd' ) );
            fulcrm_shoppingcart_invalidate_cache();
            if ( $api_data[ 'success' ] ) {
                drupal_set_message( t('Added your donation to your shopping cart.', array( '%item' => $item[ 'd' ][ 'name' ] ) ), 'status' );
                $form_state[ 'redirect' ] = 'fulcrm/cart';
            } else {
                drupal_set_message( t('There was a problem adding your donation to your shopping cart.'), 'error' );
            }
        } else {
            drupal_set_message( t('There was a problem adding your donation to your shopping cart.'), 'error' );
        }
    } else {
        drupal_set_message( t('No donation added.'), 'warning' );
    }
}

function fulcrm_shoppingcart_buy_donation_form( $form, &$form_state, $person, $product ) {
    $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] = $person;
    $form_state[ 'fulcrm_shoppingcart' ][ 'product' ] = $product;

    $form = array();

    $form[ 'title_product' ] = array( '#type' => 'markup',
                                      '#markup' => '<h3>' . check_plain( $product[ 'name' ] ) . '</h3>',
                                      );

    $form[ 'donation_amount' ] = array( '#type' => 'textfield',
                                        '#title' => 'Amount (' . $product[ '_price' ][ 'currency' ] . ')',
                                        '#default_value' => sprintf( "%.2f", $product[ '_price' ][ 'item_net' ] ),
                                        );

    drupal_set_title( check_plain( $product[ 'name' ] ) );

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'save' ] = array( '#type' => 'submit',
                                          '#value' => t('Add to Cart'),
                                          '#submit' => array( 'fulcrm_shoppingcart_buy_donation_form_submit' ),
                                          );

    return $form;
}

function fulcrm_shoppingcart_buy_donation( $person, $product ) {
   $person_id = NULL;
    if ( array_key_exists( 'id', $person ) )
        $person_id = $person[ 'id' ];

    $fulcrm_shoppingcart_buy_donation_form = drupal_get_form( 'fulcrm_shoppingcart_buy_donation_form', $person, $product );

    return theme( 'fulcrm_shoppingcart_buy_donation_page', array( 'product' => $product, 'fulcrm_shoppingcart_buy_donation_form' => $fulcrm_shoppingcart_buy_donation_form ) );
}

function fulcrm_shoppingcart_buy_generic_product_form_submit( $form, &$form_state ) {
    $product_id = $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'id' ];

    $person_uuid = NULL;
    if ( array_key_exists( 'person', $form_state[ 'fulcrm_shoppingcart' ] ) &&
         array_key_exists( 'uuid', $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] ) )
        $person_uuid = $form_state[ 'fulcrm_shoppingcart' ][ 'person' ][ 'uuid' ];

    $cart = fulcrm_shoppingcart_get_session_cart();

    if ( is_array( $cart ) ) {
        if ( $person_uuid ) {
            $patch = FALSE;
            if ( !array_key_exists( 'fulcrm', $cart[ 'd' ] ) ||
                 !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ] ) ||
                 !array_key_exists( $person_uuid, $cart[ 'd' ][ 'fulcrm' ][ 'person' ] ) ) {
                $cart[ 'd' ][ 'fulcrm' ][ 'person' ][ $person_uuid ] = array( 'uuid' => $person_uuid );
                $patch = TRUE;
            }
            if ( !array_key_exists( 'transaction', $cart[ 'd' ][ 'fulcrm' ] ) ||
                 !array_key_exists( 'person', $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ] ) ) {
                $cart[ 'd' ][ 'fulcrm' ][ 'transaction' ][ 'person' ] = $person_uuid;
                $patch = TRUE;
            }
            if ( $patch ) {
                $api_data = fulcrm_apiv2_PATCH( $cart[ 'url' ], array( 'd' => $cart[ 'd' ] ),
                                                $query = array( 'expand' => 'd' ) );
                fulcrm_shoppingcart_invalidate_cache();
            }
        }

        $shoppingitem_name = ( $form_state[ 'fulcrm_shoppingcart' ][ 'product' ][ 'name' ] );

        $item = array( 'shoppingcart' => $cart[ 'url' ],
                       'product' => fulcrm_apiv2_make_url( 'product', $product_id ),
                       'quantity' => 1.0,
                       'd' => array( 'name' => $shoppingitem_name,
                                     ),
                       );

        $api_data = fulcrm_apiv2_POST( 'shoppingitem/', $item, $query = array( 'expand' => 'd' ) );
        fulcrm_shoppingcart_invalidate_cache();
        if ( $api_data[ 'success' ] ) {
            drupal_set_message( t('Added "%item" to shopping cart.', array( '%item' => $item[ 'd' ][ 'name' ] ) ), 'status' );
            $form_state[ 'redirect' ] = 'fulcrm/cart';
        } else {
            drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
        }
    } else {
        drupal_set_message( t('There was a problem adding your item to the shopping cart.'), 'error' );
    }
}

function fulcrm_shoppingcart_buy_generic_product_form( $form, &$form_state, $person, $product ) {
    $form_state[ 'fulcrm_shoppingcart' ][ 'person' ] = $person;
    $form_state[ 'fulcrm_shoppingcart' ][ 'product' ] = $product;

    $form = array();

    $form[ 'title_product' ] = array( '#type' => 'markup',
                                      '#markup' => '<h3>' . check_plain( $product[ 'name' ] ) . '</h3>',
                                      );

    drupal_set_title( check_plain( $product[ 'data' ][ 'name' ] ) );

    _fulcrm_shoppingcart_buy_donation_product_update_form( $form, $form_state, variable_get( 'fulcrm_shoppingcart_donation_cart_product', 0 ) );

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'save' ] = array( '#type' => 'submit',
                                          '#value' => t('Add to Cart'),
                                          '#submit' => array( 'fulcrm_shoppingcart_buy_generic_product_form_submit' ),
                                          );

    return $form;
}

function _fulcrm_shoppingcart_buy( $product_id ) {
    global $user;

    $product_data = fulcrm_apiv2_GET( 'product/' . $product_id . '/',
                                      $query = array( 'expand' => implode( ',', array( 'content_object',
                                                                                       'selector_object',
                                                                                       'person_ddatacollection',
                                                                                       'organisation_ddatacollection',
                                                                                       'thing_ddatacollection',
                                                                                       'transaction_ddatacollection',
                                                                                       'lineitem_ddatacollection',
                                                                                       ) ) ) );
    if ( !$product_data[ 'success' ] ) {
        return 'error while fetching information about this product!';
    }

    if ( user_is_logged_in() ) {
        $person_id = fulcrm_webhook_get_pk_for_entity_type( 'user', $user->uid, 'person' );
    } else {
        $person_id = null;
    }

    if ( $person_id ) {
        $person_data = fulcrm_apiv2_GET( 'person/' . $person_id . '/',
                                         $query = array( 'expand' => implode( ',', array( 'd',
                                                                                          'related_from_person2persons',
                                                                                          'related_from_person2persons.related_from',
                                                                                          'related_from_person2persons.related_from.d',
                                                                                          'related_from_person2persons.relationship',
                                                                                          'related_to_person2persons',
                                                                                          'related_to_person2persons.related_to',
                                                                                          'related_to_person2persons.related_to.d',
                                                                                          'related_to_person2persons.relationship',
                                                                                          ) ) ) );
        if ( !$person_data[ 'success' ] ) {
            return 'error while fetching your details!';
        }
    } else {
        $person_data = array( 'data' => array( 'uuid' => NULL, // initialise as NULL so first item added takes over
                                               'name' => 'website visitor',
                                               'd' => array( 'name' => 'website visitor',
                                                             ),
                                               ) );
    }

    $cart = fulcrm_shoppingcart_get_session_cart( $create = true );
    if ( !$cart ) {
        return 'error while fetching the contents of your shopping cart!';
    }

    $hook_results = module_invoke_all( 'fulcrm_shoppingcart_pre_add_to_cart', $cart, $person_data[ 'data' ], $product_data[ 'data' ] );
    foreach ( $hook_results as $hook_result )
        return $hook_result;

    if ( variable_get( 'fulcrm_shoppingcart_donations', false ) ) {
        $checkout_product_id = variable_get( 'fulcrm_shoppingcart_donation_checkout_product', 0 );
        if ( ( $checkout_product_id > 0 ) && ( $product_data[ 'data' ][ 'id' ] == $checkout_product_id ) )
            return fulcrm_shoppingcart_buy_donation( $person_data[ 'data' ], $product_data[ 'data' ] );

        $solicited_product_id = variable_get( 'fulcrm_shoppingcart_donation_solicited_product', 0 );
        if ( ( $solicited_product_id > 0 ) && ( $product_data[ 'data' ][ 'id' ] == $solicited_product_id ) )
            return fulcrm_shoppingcart_buy_donation( $person_data[ 'data' ], $product_data[ 'data' ] );

        $cart_product_id = variable_get( 'fulcrm_shoppingcart_donation_cart_product', 0 );
        if ( ( $cart_product_id > 0 ) && ( $product_data[ 'data' ][ 'id' ] == $cart_product_id ) )
            return fulcrm_shoppingcart_buy_donation( $person_data[ 'data' ], $product_data[ 'data' ] );
    }

    switch ( $product_data[ 'data' ][ 'content_object' ][ 'url' ] ? fulcrm_apiv2_url_to_type( $product_data[ 'data' ][ 'content_object' ][ 'url' ] ) : null ) {
    case 'eventbookingtype':
        $eventbookingtype_data = fulcrm_apiv2_GET( $product_data[ 'data' ][ 'content_object' ][ 'url' ],
                                                   $query = array( 'expand' => implode( ',', array( 'event',
                                                                                                    'person_ddatacollection',
                                                                                                    'eventbooking_ddatacollection',
                                                                                                    'eventbookingtypeslots',
                                                                                                    'eventbookingtypeslots.eventslot',
                                                                                                    'event',
                                                                                                    'event.eventparts',
                                                                                                    'event.eventparts.eventslots' ) ) ) );
        if ( !$eventbookingtype_data[ 'success' ] ) {
            return 'error while fetching information about your booking!';
        }

        return fulcrm_shoppingcart_buy_eventbookingtype( $person_data[ 'data' ], $eventbookingtype_data[ 'data' ], $product_data[ 'data' ] );
        break;
    case null:
        return drupal_get_form( 'fulcrm_shoppingcart_buy_generic_product_form', $person_data[ 'data' ], $product_data[ 'data' ] );
    default:
        return 'cannot handle these products yet';
    }
    return 'ok!';

}

function fulcrm_shoppingcart_buy( $product_id, $hmac ) {
    global $user;

    if ( fulcrm_crypto_check_object_id_hmac( 'product', $product_id, $hmac ) ) {
        return _fulcrm_shoppingcart_buy( $product_id );
    } else {
        drupal_not_found();
    }
}

function fulcrm_shoppingcart_remove_shoppingitem_confirm_submit( $form, &$form_state ) {
    $api_data = fulcrm_apiv2_DELETE( $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ][ 'url' ] );
    fulcrm_shoppingcart_invalidate_cache();
    if ( $api_data[ 'success' ] ) {
        drupal_set_message( t('Removed "%item" from cart.', array( '%item' => ( array_key_exists( 'name', $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ][ 'd' ] ) ? $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ][ 'd' ][ 'name' ] : $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ][ 'product' ][ 'name' ] ) ) ), 'status' );

          $cart = fulcrm_shoppingcart_get_session_cart();
          if ( !$cart ) {
              return 'error while fetching information about your shopping cart!';
          }
          $hook_results = module_invoke_all( 'fulcrm_shoppingcart_post_remove_from_cart', $cart, $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ][ 'product' ] );
          foreach ( $hook_results as $hook_result )
              return $hook_result;
    }
    $form_state[ 'redirect' ] = 'fulcrm/cart';
}

function fulcrm_shoppingcart_remove_shoppingitem_confirm( $form, &$form_state, $shoppingitem ) {
    $form_state[ 'fulcrm_shoppingcart' ][ 'shoppingitem' ] = $shoppingitem;

    $cart = fulcrm_shoppingcart_get_session_cart();
    if ( !$cart ) {
        return 'error while fetching information about your shopping cart!';
    }

    $hook_results = module_invoke_all( 'fulcrm_shoppingcart_pre_remove_from_cart', $cart, $shoppingitem );
    foreach ( $hook_results as $hook_result )
        return $hook_result;

    return confirm_form( $form, 
                         t('Remove from cart?'), 
                         'fulcrm/cart',
                         t('Are you sure you want to remove "%item" from your shopping cart?', array( '%item' => ( array_key_exists( 'name', $shoppingitem[ 'd' ] ) ? $shoppingitem[ 'd' ][ 'name' ] : $shoppingitem[ 'product' ][ 'name' ] ) ) ), 
                         t('Remove'), 
                         t('Cancel')
                         );
}

function fulcrm_shoppingcart_remove( $shoppingitem_id, $hmac ) {
    if ( fulcrm_crypto_check_object_id_hmac( 'shoppingitem', $shoppingitem_id, $hmac ) ) {
        $shoppingitem_data = fulcrm_apiv2_GET( 'shoppingitem/' . $shoppingitem_id . '/',
                                               $query = array( 'expand' => implode( ',', array( 'd',
                                                                                                'product',
                                                                                                'content_object',
                                                                                                'shoppingcart',
                                                                                                ) ) ) );

        if ( $shoppingitem_data[ 'success' ] ) {
            if ( $shoppingitem_data[ 'data' ][ 'shoppingcart' ][ 'completed' ] ) {
                drupal_set_message( t('Shopping cart has been ordered. You can\'t remove things now!'), 'error' );
                drupal_goto( '<front>' );
                return;
            }

            if ( $shoppingitem_data[ 'data' ][ 'shoppingcart' ][ 'abandoned' ] ) {
                drupal_set_message( t('Sorry, your shopping cart has timed out. Please restart your purchase.'), 'error' );
                drupal_goto( variable_get( 'fulcrm_shoppingcart_proceed_url', '<front>' ) );
                return;
            }

            return drupal_get_form( 'fulcrm_shoppingcart_remove_shoppingitem_confirm', $shoppingitem_data[ 'data' ] );
        } else {
            drupal_set_message( t('Cannot remove item: it\'s already gone?'), 'error' );;
            drupal_goto( 'fulcrm/cart' );
        }
    }
}

function fulcrm_shoppingcart_cart() {
    $cart = fulcrm_shoppingcart_get_session_cart( false );
    return theme( 'fulcrm_shoppingcart_cart', array( 'cart' => $cart ) );
}

function fulcrm_shoppingcart_coupon_form_submit( $form, &$form_state ) {
    $transaction_id = $form_state[ 'fulcrm_shoppingcart' ][ 'transaction_id' ];
    $coupon_code = $form_state[ 'values' ][ 'coupon_code' ];
    if ( $coupon_code && $transaction_id ) {
        $paymentitem_data = fulcrm_apiv2_POST( 'transaction/' . $transaction_id . '/coupon/',
                                               array(),
                                               array( 'coupon_code' => $coupon_code,
                                                      'expand' => implode( ',', array( 'd' ) ) ) );

        if ( $paymentitem_data[ 'success' ] ) {
            if ( count( $paymentitem_data[ 'data' ] ) ) {
                drupal_set_message( t('Coupon code applied!'), 'info' );
            } else {
                drupal_set_message( t('That is not a valid coupon code.'), 'warning' );
            }
        } else {
            drupal_set_message( t('There was a problem redeeming your coupon.'), 'error' );
        }
    } else {
        drupal_set_message( t('That is not a valid coupon code.'), 'error' );
    }

    drupal_goto( 'fulcrm/checkout' );
}

function fulcrm_shoppingcart_coupon_form( $form, &$form_state, $transaction_id ) {
    $form_state[ 'fulcrm_shoppingcart' ][ 'transaction_id' ] = $transaction_id;

    $form = array();

    $form[ 'title_coupon' ] = array( '#type' => 'markup',
                                     '#markup' => '<h1>' . t('Redeem Coupon') . '</h1>',
                                     );

    $form[ 'coupon_code' ] = array( '#type' => 'textfield',
                                    '#title' => t('Coupon Code'),
                                    '#description' => t('Please carefully type the coupon code here. Coupons can only be used once, and are non-refundable.'),
                                    );

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'save' ] = array( '#type' => 'submit',
                                          '#value' => t('Use Coupon'),
                                          '#submit' => array( 'fulcrm_shoppingcart_coupon_form_submit' ),
                                          );

    return $form;
}

function fulcrm_shoppingcart_coupon( $transaction_id, $hmac ) {
    if ( fulcrm_crypto_check_object_id_hmac( 'transaction', $transaction_id, $hmac ) ) {
        return drupal_get_form( 'fulcrm_shoppingcart_coupon_form', $transaction_id );
    } else {
        drupal_goto( 'fulcrm/checkout' );
    }
}

function fulcrm_shoppingcart_donate() {
    if ( variable_get( 'fulcrm_shoppingcart_donations', false ) ) {
        $product_id = variable_get( 'fulcrm_shoppingcart_donation_solicited_product', null );
        if ( $product_id )
            return _fulcrm_shoppingcart_buy( $product_id );
    }
    return drupal_goto( 'fulcrm/checkout' );
}

function _fulcrm_shoppingcart_checkout_2( &$cart ) {
    $hook_results = module_invoke_all( 'fulcrm_shoppingcart_pre_cart_to_transaction', $cart );
    foreach ( $hook_results as $hook_result )
        return $hook_result;

    $transaction_data = fulcrm_apiv2_POST( $cart[ 'url' ] . 'transaction/', array(), array( 'expand' => implode( ',', array( 'd' ) ) ) );
    fulcrm_shoppingcart_invalidate_cache();
    if ( $transaction_data[ 'success' ] ) {
        $hmac = fulcrm_crypto_object_id_hmac( 'transaction', $transaction_data[ 'data' ][ 'id' ] );

        $transaction_push = array( 'd' => array( 'fulcrm_fund_transaction_pay_failure_url' => url( 'fulcrm/checkout/failure/' . $transaction_data[ 'data' ][ 'id' ]. '/' . $hmac, array( 'absolute' => TRUE ) ),
                                                 'fulcrm_fund_transaction_complete_success_url' => url( 'fulcrm/checkout/success/' . $transaction_data[ 'data' ][ 'id' ]. '/' . $hmac, array( 'absolute' => TRUE ) ),
                                                 'fulcrm_fund_transaction_complete_failure_url' => url( 'fulcrm/checkout/failure/' . $transaction_data[ 'data' ][ 'id' ]. '/' . $hmac, array( 'absolute' => TRUE ) ),
                                                 ),
                                   );

        $transaction_data2 = fulcrm_apiv2_PATCH( $transaction_data[ 'data' ][ 'url' ],
                                                 $transaction_push, $query = array( 'expand' => implode( ',', array( 'd',
                                                                                                                     'lineitems',
                                                                                                                     'paymentitems',
                                                                                                                     ) ) ) );
        fulcrm_shoppingcart_invalidate_cache();
        if ( $transaction_data2[ 'success' ] ) {
            $hook_results = module_invoke_all( 'fulcrm_shoppingcart_post_cart_to_transaction', $transaction_data2[ 'data' ] );
            foreach ( $hook_results as $hook_result )
                return $hook_result;
            return theme( 'fulcrm_shoppingcart_transaction_checkout', array( 'transaction' => $transaction_data2[ 'data' ],
                                                                             'use_coupon_url' => fulcrm_shoppingcart_coupon_url( $transaction_data[ 'data' ][ 'id' ] ),
                                                                             ) );
        }
        return 'problem 3';
    }
    return 'problem 2';
}

function fulcrm_shoppingcart_pre_cart_step_form_submit( $form, &$form_state ) {
    $cart = $form_state[ 'fulcrm_shoppingcart' ][ 'cart' ];
    foreach ( $cart[ 'shoppingitems' ] as $index => $item ) {
        if ( array_key_exists( 'eventbooking', $item[ 'd' ][ 'fulcrm' ] ) ) {
            if ( array_key_exists( '_drupal_gather', $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ] ) ) {
                $item_no = 'shoppingitem' . $item[ 'id' ];
                $item_d = fulcrm_collection_form_values_to_d( $item_no, $form_state[ 'values' ] );
                foreach ( $item_d as $k => $v ) {
                    $form_state[ 'fulcrm_shoppingcart' ][ 'cart' ][ 'shoppingitems' ][ $index ][ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ 'eventbooking' ][ $k ] = $v;
                }
                $api_data = fulcrm_apiv2_PATCH( $item[ 'url' ], array( 'd' => $form_state[ 'fulcrm_shoppingcart' ][ 'cart' ][ 'shoppingitems' ][ $index ][ 'd' ] ),
                                                $query = array( 'expand' => implode( ',', array( 'd' ) ) ) );
            }
        }
    }
    fulcrm_shoppingcart_invalidate_cache();
    return _fulcrm_shoppingcart_checkout_2( $cart );
}

function fulcrm_shoppingcart_pre_cart_step_form( $form, &$form_state, $cart ) {
    drupal_set_title( 'Additional Information Required' );

    $form_state[ 'fulcrm_shoppingcart' ][ 'cart' ] = $cart;
    // die( print_r( $cart,1 ) );

    $form[ 'title_event' ] = array( '#type' => 'markup',
                                    '#markup' => '<h1>Additional Information Required</h1>',
                                    );

    foreach ( $cart[ 'shoppingitems' ] as $index => $item ) {
        if ( array_key_exists( 'eventbooking', $item[ 'd' ][ 'fulcrm' ] ) ) {
            if ( array_key_exists( '_drupal_gather', $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ] ) ) {
                $item_no = 'shoppingitem' . $item[ 'id' ];
                $form[ $item_no ] = array( '#type' => 'fieldset',
                                           '#title' => $item[ 'd' ][ 'name' ],
                                           );
                $form[ $item_no ][ 'd' ] = fulcrm_collection_to_form( $item_no,
                                                                      $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ '_drupal_gather' ],
                                                                      $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ '_drupal_gather' ] );
            }
        }
    }

    $form[ 'actions' ] = array( '#type' => 'actions' );
    $form[ 'actions' ][ 'submit' ] = array( '#type' => 'submit',
                                            '#value' => t('Submit'),
                                            '#submit' => array( 'fulcrm_shoppingcart_pre_cart_step_form_submit' ),
                                            );
    return $form;
}

function fulcrm_shoppingcart_pre_cart_step( &$cart ) {
    return drupal_get_form( 'fulcrm_shoppingcart_pre_cart_step_form', $cart );
}

function fulcrm_shoppingcart_has_pre_cart_step( &$cart ) {
    foreach ( $cart[ 'shoppingitems' ] as $k => $item ) {
        if ( array_key_exists( 'eventbooking', $item[ 'd' ][ 'fulcrm' ] ) ) {
            if ( array_key_exists( '_drupal_gather', $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ] ) ) {
                if ( array_key_exists( 'eventbooking', $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ] ) ) {
                    if ( empty( $item[ 'd' ][ 'fulcrm' ][ 'eventbooking' ][ 'eventbooking' ] ) ) {
                        return true;
                    }
                } else {
                    return true;
                }
            }
        }
    }
    return false;
}

function fulcrm_shoppingcart_checkout() {
    $cart = fulcrm_shoppingcart_get_session_cart( false );
    if ( $cart && array_key_exists( 'url', $cart ) ) {
        if ( fulcrm_shoppingcart_has_pre_cart_step( $cart ) ) {
            return fulcrm_shoppingcart_pre_cart_step( $cart );
        }
        return _fulcrm_shoppingcart_checkout_2( $cart );
    }
    return 'problem 1';
}

function fulcrm_shoppingcart_checkout_success( $transaction_id, $hmac ) {
    if ( fulcrm_crypto_check_object_id_hmac( 'transaction', $transaction_id, $hmac ) ) {
        fulcrm_shoppingcart_invalidate_cache();
        $transaction_data = fulcrm_apiv2_GET( 'transaction/' . $transaction_id . '/',
                                              $query = array( 'expand' => implode( ',', array( 'd',
                                                                                               'lineitems',
                                                                                               'lineitems.d',
                                                                                               'lineitems.content_object',
                                                                                               'mailshots',
                                                                                               'mailshots.campaign',
                                                                                               'paymentitems',
                                                                                               'paymentitems.d',
                                                                                                ) ) ) );
        if ( $transaction_data[ 'success' ] ) {
            if ( $transaction_data[ 'data' ][ 'completed' ] ) {
                $hook_results = module_invoke_all( 'fulcrm_shoppingcart_transaction_success', $transaction_data[ 'data' ] );
                foreach ( $hook_results as $hook_result )
                    return $hook_result;
                drupal_set_message( t('Thank you for your order.'), 'status' );
            } else if ( $transaction_data[ 'data' ][ 'submitted' ] ) {
                drupal_set_message( t('Payment has not yet been processed.'), 'warning' );
            } else {
                drupal_set_message( t('This transaction has not yet completed.'), 'warning' );
            }
            return theme( 'fulcrm_shoppingcart_transaction_complete', array( 'transaction' => $transaction_data[ 'data' ] ) );
        } else {
            drupal_set_message( t('Although your transaction appears to have completed successfully, there has been a problem fetching the full transaction data.'), 'error' );
        }
    }
}

function fulcrm_shoppingcart_checkout_failure( $transaction_id, $hmac ) {
    if ( fulcrm_crypto_check_object_id_hmac( 'transaction', $transaction_id, $hmac ) ) {
        fulcrm_shoppingcart_invalidate_cache();
        $transaction_data = fulcrm_apiv2_GET( 'transaction/' . $transaction_id . '/',
                                              $query = array( 'expand' => implode( ',', array( 'd',
                                                                                               'lineitems',
                                                                                               'lineitems.d',
                                                                                               'lineitems.content_object',
                                                                                               'mailshots',
                                                                                               'mailshots.campaign',
                                                                                               'paymentitems',
                                                                                               'paymentitems.d',
                                                                                                ) ) ) );
        if ( $transaction_data[ 'success' ] ) {
            $hook_results = module_invoke_all( 'fulcrm_shoppingcart_transaction_failure', $transaction_data[ 'data' ] );
        } else {
            $hook_results = module_invoke_all( 'fulcrm_shoppingcart_transaction_failure', NULL );
        }
        foreach ( $hook_results as $hook_result )
            return $hook_result;
        return theme( 'fulcrm_shoppingcart_transaction_incomplete', array( 'transaction' => $transaction_data[ 'data' ] ) );
    }
}

function fulcrm_shoppingcart_user_logout( $account ) {
    if ( array_key_exists( 'fulcrm_shoppingcart_id', $_SESSION ) ) {
        // XXX cancel transaction if one exists?
        unset( $_SESSION[ 'fulcrm_shoppingcart_id' ] );
    }
}

function fulcrm_shoppingcart_create_for_fulcrm_shoppingcart( &$vars ) {
}

function fulcrm_shoppingcart_update_for_fulcrm_shoppingcart( &$vars ) {
    if ( fulcrm_apiv2_url_to_type( $data[ 'url' ] ) === 'shoppingcart' ) {
        $cart_id = fulcrm_apiv2_url_to_pk( $data[ 'url' ] );
        if ( $cart_id )
            fulcrm_shoppingcart_invalidate_cache( $cart_id );
    }
}

function fulcrm_shoppingcart_delete_for_fulcrm_shoppingcart( &$vars ) {
    if ( fulcrm_apiv2_url_to_type( $data[ 'url' ] ) === 'shoppingcart' ) {
        $cart_id = fulcrm_apiv2_url_to_pk( $data[ 'url' ] );
        if ( $cart_id )
            fulcrm_shoppingcart_invalidate_cache( $cart_id );
    }
}

function fulcrm_shoppingcart_create_for_fulcrm_shoppingitem( &$vars ) {
}

function fulcrm_shoppingcart_update_for_fulcrm_shoppingitem( &$vars ) {
    if ( fulcrm_apiv2_url_to_type( $data[ 'shoppingcart' ] ) === 'shoppingcart' ) {
        $cart_id = fulcrm_apiv2_url_to_pk( $data[ 'shoppingcart' ] );
        if ( $cart_id )
            fulcrm_shoppingcart_invalidate_cache( $cart_id );
    }
}

function fulcrm_shoppingcart_delete_for_fulcrm_shoppingitem( &$vars ) {
    fulcrm_shoppingcart_invalidate_cache( '*' );
}

function fulcrm_shoppingcart_create_for_fulcrm_transaction( &$vars ) {
    if ( fulcrm_apiv2_url_to_type( $data[ 'content_object' ] ) === 'shoppingcart' ) {
        $cart_id = fulcrm_apiv2_url_to_pk( $data[ 'content_object' ] );
        if ( $cart_id )
            fulcrm_shoppingcart_invalidate_cache( $cart_id );
    }
}