now checking capacity and showing options

fulcrm_shoppingcart.module

@@ -590,6 +590,44 @@ function fulcrm_shoppingcart_buy_eventbookingtype_form( $form, &$form_state, $pe
         $form[ '#submit' ] = 'fulcrm_shoppingcart_buy_eventbookingtype_person_add_guest_form_submit';
     }
 
+    $form[ 'eventslots' ] = array( '#title' => 'Options',
+                                   '#type' => 'fieldset',
+                                   ); 
+    $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' ] );
+        if ( !array_key_exists( $eventpart_id, $form[ 'eventslots' ] ) )
+            $form[ 'eventslots' ][ $eventpart_id ] = array( '#type' => 'radios',
+                                                            '#title' => $eventparts[ $eventpart_id ][ 'name' ],
+                                                            '#options' => array(),
+                                                            );
+        $eventslot_id = fulcrm_crypto_object_id_form_value( 'eventslot.id', $eventslot[ 'id' ] );
+        $form[ 'eventslots' ][ $eventpart_id ][ '#options' ][ $eventslot_id ] = $eventslot[ 'name' ];
+    }
+
+    foreach ( $form[ 'eventslots' ] as $eventpart_id => $eventpart ) {
+        if ( count( $eventpart[ '#options' ] ) == 1 ) {
+            foreach ( $eventpart[ '#options' ] as $option_key => $option_value )
+                $eventpart[ '#default_value' ] = $option_key;
+        } else {
+            foreach ( $eventpart[ '#options' ] as $option_key => $option_value ) {
+                $eventslot_id = fulcrm_crypto_get_object_id_form_value( 'eventslot.id', $option_key );
+                if ( $eventslot_id && !fulcrm_shoppingcart_eventslot_has_capacity( $eventslot_id ) ) {
+                    unset( $eventpart[ '#options' ][ $option_key ] );
+                }
+            }
+        }
+    }
+
     $form[ 'actions' ] = array( '#type' => 'actions' );
     $form[ 'actions' ][ 'submit' ] = array( '#type' => 'submit',
                                             '#value' => t('Add to Cart'),
@@ -793,7 +831,10 @@ function fulcrm_shoppingcart_buy( $product_id, $hmac ) {
                                                                                                         'person_ddatacollection',
                                                                                                         'eventbooking_ddatacollection',
                                                                                                         'eventbookingtypeslots',
-                                                                                                        'eventbookingtypeslots.eventslot' ) ) ) );
+                                                                                                        'eventbookingtypeslots.eventslot',
+                                                                                                        'event',
+                                                                                                        'event.eventparts',
+                                                                                                        'event.eventparts.eventslots' ) ) ) );
             if ( !$eventbookingtype_data[ 'success' ] ) {
                 return 'error while fetching information about your booking!';
             }