CompositeForm.php

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<?php
import('Dataface/QuickForm.php');
class Dataface_CompositeForm extends HTML_QuickForm {
        var $uris = array(); 
        
        var $quickforms = array();      
                                                                
        var $records = array();
        
        
        var $fields;
        
        var $changed_fields = array();

                                                        
        function Dataface_CompositeForm($uris){
                $this->uris = $uris;
                $this->HTML_QuickForm();
        }
        
        function &getQuickForm($uri){
                // This returns a builder quickform to build the form 
                // for the given URI.
                if ( strpos($uri,'?') !== false ){
                        // We strip the fieldname off the end of the uri
                        // because we only want to store one of each record.
                        list($uri) = explode('?',$uri);
                }
                
                if ( strpos($uri,'/') !== false ){
                        list($uri) = explode('/',$uri);
                }
                
                if ( !isset($this->quickforms[$uri]) ){
                        $this->quickforms[$uri] = new Dataface_QuickForm($uri);
                }
                return $this->quickforms[$uri];
                
                
        }
        
        function &getRecord($uri){
                if ( strpos($uri,'#') !== false ){
                        // We strip the fieldname off the end of the uri
                        // because we only want to store one of each record.
                        list($uri) = explode('#',$uri);
                }
                
                if ( !isset($this->records[$uri]) ){
                        $this->records[$uri] =& df_get($uri);
                }
                return $this->records[$uri];
                
        }
        
        function &getTable($uri){
                if ( strpos($uri,'?') !== false ){
                        // We strip the fieldname off the end of the uri
                        // because we only want to store one of each record.
                        list($uri) = explode('?',$uri);
                }
                
                if ( strpos($uri,'/') !== false ){
                        list($uri) = explode('/',$uri);
                }
                return Dataface_Table::loadTable($uri);
        }
        
        function &getFieldDef($uri){
                if ( strpos($uri,'#') === false ){
                        $err =& PEAR::raiseError('No field specified in CompositeForm::getFieldDef.');
                        return $err;
                }
                list($uri,$fieldname) = explode('#',$uri);
                $table =& $this->getTable($uri);
                $field =& $table->getField($fieldname);
                return $field;
                
        }
        
        function &getFieldDefs($uri=null){

                if ( isset($uri) ){
                        $defs = array();
                        if ( strpos($uri,'#') !== false ){
                                $fld =& $this->getFieldDef($uri);
                                $defs[$uri] =& $fld;
                        } else {
                                $table =& $this->getTable($uri);
                                $flds =& $table->fields();
                                foreach (array_keys($flds) as $key){
                                        $defs[$uri.'#'.$key] =& $flds[$key];
                                }
                        }
                        return $defs;
                } else {

                        if ( !isset($this->fields) ){
                                $this->fields = array();
                                foreach ( $this->uris as $uri ){
                                        $this->fields = array_merge($this->fields, $this->getFieldDefs($uri));
                                }
                        }
                        return $this->fields;
                }
                
        }
        
        
        function build(){
                $formTool =& Dataface_FormTool::getInstance();
                foreach ( $this->getFieldDefs() as $uri=>$fieldDef ){
                        
                        //$qf =& $this->getQuickForm($uri);
                        $record =& $this->getRecord($uri);
                        /*
                         * 
                         * If the user does not have permission to view this field, we should not generate this widget.
                         *
                         */
                        if ( !Dataface_PermissionsTool::view($record, array('field'=>$fieldDef['name']))){
                        
                                continue;
                        
                        }
                        $el =& $formTool->buildWidget($record,$fieldDef, $this, $uri);
                        if ( PEAR::isError($el) ) trigger_error($el->getMessage(), E_USER_ERROR);
                        //$el->setName($uri);
                        //$this->addElement($el);
                        //$this->setDefaults(array( $uri => df_get($uri,'strval')));
                        unset($el);
                        unset($record);
                        unset($fieldDef);
                        
                        
                }
                $this->addElement('submit','submit','Save');
        }
        
        function save(){
                $db =& Dataface_DB::getInstance();
                $db->startTransaction();
                $formTool =& Dataface_FormTool::getInstance();
                foreach ($this->getFieldDefs() as $uri=>$fieldDef ){
                        $record =& $this->getRecord($uri);
                        $formTool->pushField($record, $fieldDef, $this, $uri);
                        if ( $record->valueChanged($fieldDef['name']) ) $this->changed_fields[] = $uri;
                }
                
                foreach ( array_keys($this->records) as $uri ){
                        $res = $this->records[$uri]->save(null, true);
                        if ( PEAR::isError($res) ){
                                $db->rollbackTransaction();
                                return $res;
                        }
                        
                }
                $db->commitTransaction();
                return true;
        }
        
        function htmlValues(){
                $vals = array();
                foreach ($this->changed_fields as $uri){
                        $record =& $this->getRecord($uri);
                        list($record_uri, $fieldname) = explode('#',$uri);
                        $vals[$uri] = $record->htmlValue($fieldname);
                        unset($record);
                }
                return $vals;
        }
}