<?php
/**
 * SCPHP
 *
 * An open source SmartClient library for PHP
 *
 * @package		SCPHP
 * @author		Fernando Marcelo Morgenstern <fernando@consultorpc.com> 
 * @copyright		Copyright (c) 2010, ConsultorPC
 * @license		http://www.gnu.org/licenses/lgpl-3.0-standalone.html
 * @link		http://smartclientphp.com/
 * @since		Version 0.1b
 * @filesource
 */


/**
 * Smart Client Data Source Helper
 *
 */
class ScDataSource extends ScGeneral 
{
	
	/**
	 * @var Array 
	 */
	protected $_fields;

	/**
	 * 
	 * Add Field
	 *
	 * @param mixed $data If string, it must be the id of the field. If array, them we will loop on it
	 * @param string $title Title of the field
	 * @param boolean $primaryKey True if this field is a primary key
	 * @param string $foreignKey Name of the foreign key, if necessary
	 * @param integer $rootValue Root value
	 * @param boolean $canEdit True if this field is editable
	 * @param array $options Additional options
	 * @return string
	 * 
	 */
	public function addField( $data , $title = '' , $primaryKey = false , $foreignKey = '' , $rootValue = 0 , $canEdit = true , $options = '' )
	{
		$newField = array();
		
		// Check if it is an array
		if ( is_array( $data ) )
		{
			$newField = $data;
		}
		else
		{
			// Add name and title to the new field
			$newField['name'] = $data;
			$newField['title'] = $title;
			$newField['primaryKey'] = $primaryKey;
			$newField['foreignKey'] = $foreignKey;
			$newField['rootValue'] = $rootValue;
			$newField['canEdit'] = $canEdit;
			
			// Check if options is array and do the loop
			if ( is_array( $options ) )
			{
				foreach ( $options as $name => $value )
				{
					$newField[$name] = $value;
				}
			}
		}
		
		// TODO: Check if at least name and title are set on the new field
		// Add field to the array
		$this->_fields[] = $newField;
	}

	/**
	 * Add Fields
	 *
	 * Get an array and do a loop using the addField function
	 * 
	 * @param array $data Array containing multiple fields
	 *  
	 */
	public function addFields( $data )
	{
		if ( is_array( $data ) )
		{
			foreach ( $data as $row )
			{
				$this->addField( $row );
			}
		}
	}
	
	/**
	 * Get Fields
	 *
	 * Return the current fields array
	 * 
	 * @return array
	 *  
	 */
	public function getFields()
	{
		return $this->_fields;
	}
	
	/**
	 * 
	 * Clear fields
	 *
	 * Clear Fields array
	 *  
	 */
	public function clearFields()
	{
		unset( $this->_fields );
	}
		
	/**
	 * Create
	 *
	 * Create a data source 
	 * 
	 * @param mixed $data If string, it must be the id of the data source. If array, them we will loop on it
	 * @param string $dataFormat Data format
	 * @param string $fetchURL
	 * @param string $addURL
	 * @param string $updateURL
	 * @param string $removeURL
	 * @param array $options Additional options
	 * @return string
	 *  
	 */
	public function create( $data , $fetchURL = '' , $addURL = '' , $updateURL = '' , $removeURL = '' , $dataFormat = 'json' ,  $options = '' )
	{
		$newDataSource = array();
		
		// Check if we have an array
		if ( is_array( $data ) )
		{
			$newDataSource = $data;
		}
		else
		{
			// Add var to the new data soure
			$newDataSource['ID'] = $data;
			$newDataSource['dataFormat'] = $dataFormat;
			
			// Set Fields
			$newDataSource['fields'] = $this->_fields;
			
			// Set operationBindings for fetch, add, update and remove
			$operationBindings = array();
			$operationBindings[0]['dataURL'] = $fetchURL;
			$operationBindings[0]['operationType'] = 'fetch';
			
			$operationBindings[1]['dataURL'] = $addURL;
			$operationBindings[1]['operationType'] = 'add';
			
			$operationBindings[2]['dataURL'] = $updateURL;
			$operationBindings[2]['operationType'] = 'update';
			
			$operationBindings[3]['dataURL'] = $removeURL;
			$operationBindings[3]['operationType'] = 'remove';
			
			// Assign operationBindings to our newDataSource array
			$newDataSource['operationBindings'] = $operationBindings;
			
			// Set the default value for dataProtocol
			if ( !isset( $options['dataProtocol'] ) )
			{
				$options['dataProtocol'] = 'postParams';
			}
			
			// Check if options is array and do the loop
			if ( is_array( $options ) )
			{
				foreach ( $options as $name => $value )
				{
					$newDataSource[$name] = $value;
				}
			}
		}
		
		// Encode data
		$dataEncoded = $this->encode( $newDataSource );
		
		// Generate js code
		$js = 'isc.RestDataSource.create( '. $dataEncoded .' );';
		
		// Add script tag
		$js = $this->addScriptTags( $js );
		
		return $js;
	}
}