<?php
/**
 * Allows CMS user to create forms dynamically.
 *
 * @package userforms
 */
class FieldEditor extends FormField {
	
	protected $haveFormOptions = true;
	
	protected $readonly = false;
	
	function isReadonly() {
		return $this->readonly;
	}
	
	function performReadonlyTransformation() {
		$clone = clone $this;
		$clone->setReadonly(true);
		return $clone;
	}
	
	function makeReadonly() {
		return $this->performReadonlyTransformation();
	}
	
	function FieldHolder() {
		return $this->renderWith("FieldEditor");
	}
	
	function Fields() {
		Requirements::css("userforms/css/FieldEditor.css");
		Requirements::javascript("jsparty/jquery/ui/ui.core.js");
		Requirements::javascript("jsparty/jquery/ui/ui.sortable.js");
		Requirements::javascript("userforms/javascript/UserForm.js");
		
		$relationName = $this->name;
		
		$fields = $this->form->getRecord()->$relationName();

		if($this->readonly) {
			$readonlyFields = new DataObjectSet();
			
			foreach($fields as $field) {
				$field->setEditor($this);
				$readonlyFields->push($field->makeReadonly());
			}
				
			$fields = $readonlyFields;
		}
		return $fields;
	}
	
	/**
	 * Return a DataObjectSet of all the addable fields to populate 
	 * the add field menu
	 * 
	 * @return DataObjectSet
	 */
	function CreatableFields() {
		$fields = ClassInfo::subclassesFor('EditableFormField');

		if($fields) {
			array_shift($fields); // get rid of subclass 0
			$output = new DataObjectSet();
			foreach($fields as $field => $title) {
				// get the nice title and strip out field
				$niceTitle = trim(str_ireplace("Field", "", eval("return $title::\$singular_name;"))); 
				if($title != 'MultipleOptionField') {
					$output->push(new ArrayData(array(
						'ClassName' => $field,
						'Title' => "$niceTitle"
					)));
				}
			}
			return $output;
		}
		return false;
	}
	
	/**
	 * Handles saving the page. Needs to keep an eye on fields
	 * and options which have been removed / added 
	 *
	 * @param DataObject Record to Save it In
	 */
	function saveInto(DataObject $record) {
		
		$name = $this->name;

		$fieldSet = $record->$name();		        
		
		// @todo shouldn't we deal with customFormActions on that object?
		$record->EmailOnSubmit = isset( $_REQUEST[$name]['EmailOnSubmit'] ) ? "1" : "0";
		$record->SubmitButtonText = isset($_REQUEST[$name]['SubmitButtonText']) ? $_REQUEST[$name]['SubmitButtonText'] : "";
		$record->ShowClearButton = isset($_REQUEST[$name]['ShowClearButton']) ? "1" : "0";
		
		// store the field IDs and delete the missing fields
		// alternatively, we could delete all the fields and re add them
		$missingFields = array();

	    foreach($fieldSet as $existingField){
	    	$missingFields[$existingField->ID] = $existingField;
	    }    	    

		if($_REQUEST[$name]){
			foreach( array_keys( $_REQUEST[$name] ) as $newEditableID ) {
				$newEditableData  = $_REQUEST[$name][$newEditableID];

		  		$editable = DataObject::get_one('EditableFormField', "(`ParentID`='{$record->ID}' OR `ParentID`=0) AND `EditableFormField`.`ID`='$newEditableID'" ); 

		  		// check if we are updating an existing field. One odd thing is a 'deleted' field
		 		// still exists in the post data (ID) so we need to check for type.
		  		if($editable && isset($missingFields[$editable->ID]) && isset($newEditableData['Type'])) {
		  			// check if it has been labelled as deleted
					if(isset($newEditableData['Title']) && $newEditableData['Title'] != 'field-node-deleted') {
						unset($missingFields[$editable->ID]);
					}
				}
				
				if($editable) {
					if($editable->ParentID == 0) {
						$editable->ParentID = $record->ID;
					}
					$editable->populateFromPostData($newEditableData);
				}
		    }
		}

    	// remove the fields not saved
    	foreach($missingFields as $removedField) {
    		if(is_numeric($removedField->ID)) $removedField->delete();
    	}

    	if($record->hasMethod('customFormSave')) {
			$record->customFormSave( $_REQUEST[$name], $record );
		}	
		
		if($record->hasMethod( 'processNewFormFields')) {
			$record->processNewFormFields();
		}
	}
	
	/**
	 * Add a field to the field editor. Called via a ajax get request
	 * from the userdefinedform javascript
	 *
	 * @return bool|html
	 */
	public function addfield() {
		// get the last field in this form editor
		$parentID = $this->form->getRecord()->ID;
		
		if($parentID) {
			$parentID = Convert::raw2sql($parentID); // who knows what could happen
			$highestSort = DB::query("SELECT MAX(Sort) FROM EditableFormField WHERE ParentID = '$parentID'");
			$sort = $highestSort->value() + 1;

			$className = (isset($_REQUEST['Type'])) ? $_REQUEST['Type'] : '';

			if(is_subclass_of($className, "EditableFormField")) {
				$field = new $className();
				$field->write();
				$field->ParentID = $this->form->getRecord()->ID;
				$field->Name = $field->class . $field->ID;
				$field->Sort = $sort;
				$field->write();
				return $field->EditSegment();
			}
		}
		return false;
	}
	
	/**
	 * Return the html for a field option such as a 
	 * dropdown field or a radio check box field
	 *
	 * @return bool|html
	 */
	public function addoptionfield() {
		// passed via the ajax
		$parent = (isset($_REQUEST['Parent'])) ? $_REQUEST['Parent'] : false;
		$text = (isset($_REQUEST['Text'])) ? $_REQUEST['Text'] : "";
		
		// work out the sort by getting the sort of the last field in the form +1
		if($parent) {
			$sql_parent = Convert::raw2sql($parent);
			$highestSort = DB::query("SELECT MAX(Sort) FROM EditableOption WHERE ParentID = '$sql_parent'");
			$sort = $highestSort->value() + 1;
			
			if($parent) {
				$object = new EditableOption();
				$object->write();
				$object->ParentID = $parent;
				$object->Sort = $sort;
				$object->Name = 'option' . $object->ID;
				$object->Title = $text;
				$object->write();
				return $object->EditSegment();
			}
		}
		return false;
	}

	function setHaveFormOptions($bool){
		$this->haveFormOptions = $bool;
	}
	
	function getHaveFormOptions(){
		return $this->haveFormOptions;
	}
	
	function FormOptions() {
		if($this->haveFormOptions){
		    if($this->form->getRecord()->hasMethod('customFormActions')) {
		        $newFields = $this->form->getRecord()->customFormActions($this->readonly);
		        
		        foreach( $newFields as $newField ) {
		        	$newField->setName( "{$this->name}[{$newField->Name()}]" );
		        }
			    if($this->readonly) {
					$newFields = $newFields->makeReadonly();
			    }
			    return $newFields;
		    }
    	}
	}
}
?>