<?php



/*

 * Builder_Form

 *

 * Copyright(c) 2010, Thomas Shone

 * Licensed under the Creative Commons Attribution 3.0 Unported License.

 * http://www.shone.co.za

 *

 * Constructs forms from meta data

 */



class Builder_Form extends Builder_Base

{

	const RENDER_MODE_INPUT_ONLY	= 1;

	const RENDER_MODE_LABEL_INPUT   = 2;

	

	/**

     * Parse through the meta and determine if there are any 'file' type inputs

     * in this form. If there are return the appropriate encoding attribute.

     *

     * @param       array       $aMeta

     * @return      string

     */

    private function ___GetFormEncoding($aMeta)

    {

        if (!empty($aMeta['groups']))

        {

            foreach ($aMeta['groups'] as $aGroup)

            {

                if (!empty($aGroup['rows']))

                {

                    foreach ($aGroup['rows'] as $aRow)

                    {

                        if (!empty($aRow['element']))

                        {

                            foreach ($aRow['element'] as $aElement)

                            {

                                if ($aElement['type'] == 'file')

                                {

                                    return 'enctype="multipart/form-data"';

                                }

                            }

                        }

                    }

                }

            }

        }

        return '';

    }



    protected function BuildGroups($aMeta)

    {

        foreach ($aMeta as $aGroup)

        {

            $this->sResult .= "<thead class=\"form-head\">\n";

            !empty($aGroup['heading']) && $this->BuildHeading($aGroup['heading']);

            !empty($aGroup['subheading']) && $this->BuildSubheading($aGroup['subheading']);

            $this->sResult .= "</thead>\n";



            $this->sResult .= "<tbody class=\"form-body\">\n";

            !empty($aGroup['copy']) && $this->BuildCopy($aGroup['copy']);

            if (!empty($aGroup['rows']))

            {

                foreach ($aGroup['rows'] as $aRow)

                {

                    $this->BuildRow($aRow);

                }

            }

            $this->sResult .= "</tbody>\n";

        }

    }



    protected function BuildRow($aRow)

    {

        if (!empty($aRow['copy']))

        {

            $this->BuildInlineCopy($aRow['copy']);

        }



        // Check if all the fields are required

        $bRequired = true;

        if (!empty($aRow['element']))

        {

            foreach ($aRow['element'] as $aElement)

            {

                $bRequired &= !empty($aElement['validation']['required']);

            }

        }

        else

        {

            $bRequired = false;

        }



        #-> Build Label

        $sLabel  = !empty($aRow['label']) ? $aRow['label'] : '&nbsp;';

        $sLabel .= $bRequired ? ' <span class="required">*</span>' : '';

        if (!empty($aRow['image']))

        {

            $sLabel = '<img align="left" src="' . BuildImage($aRow['image']) .'" /> '. $sLabel;

        }

        

 		#-> Build Elements       

        $sElement = '';

        if (!empty($aRow['element']))

        {

        	$oElement = new Builder_Form_Element();

            foreach ($aRow['element'] as $aElement)

            {

                $sElement .= $oElement->Build($aElement, $this->aData);

            }

        };



        #-> Build the row's HTML

        $sRenderMode = !empty($aRow['render-mode'])

				        	? $aRow['render-mode']

				        	: '';

        

        switch ($sRenderMode)

        {

        	case self::RENDER_MODE_INPUT_ONLY:

        		$this->sResult .= "<tr>\n";

        		$this->sResult .= "<td class=\"form-value\"" . (!empty($aRow['id']) ? " id=\"" . $aRow['id'] ."-value\"" : "") . " colspan=\"2\">" . $sLabel . " " . $sElement . "</td>\n";

        		$this->sResult .= "</tr>\n";

        		break;

        

        	case self::RENDER_MODE_LABEL_INPUT:

        	default:

        		$this->sResult .= "<tr>\n";

        		$this->sResult .= "<td class=\"form-label\"" . (!empty($aRow['id']) ? " id=\"" . $aRow['id'] ."-label\"" : "") . ">" . $sLabel . "</td>\n";

        		$this->sResult .= "<td class=\"form-value\"" . (!empty($aRow['id']) ? " id=\"" . $aRow['id'] ."-value\"" : "") . ">" . $sElement . "</td>\n";

		        $this->sResult .= "</tr>\n";

		        break;

        }

    }



    protected function BuildHeading($sHeading)

    {

        $this->sResult .= '<tr><td colspan="2" class="form-header">' . $sHeading . '</td></tr>' . "\n";

    }



    protected function BuildSubheading($sSubheading)

    {

        $this->sResult .= '<tr><td colspan="2" class="form-subheader">' . $sSubheading . '</td></tr>' . "\n";

    }



    protected function BuildInlineCopy($sCopy)

    {

        $this->sResult .= '<tr><td colspan="2" class="form-inline-copy">' . $sCopy . '</td></tr>' . "\n";

    }



    protected function BuildCopy($sCopy)

    {

        $this->sResult .= '<tr><td colspan="2" class="form-copy">' . $sCopy . '</td></tr>' . "\n";

    }



    protected function BuildIdentity($sIdentity)

    {

        $this->sResult .= "<input type=\"hidden\" name=\"input[identity]\" value=\"" . $sIdentity . "\">\n";

    }



    protected function BuildWorkflow($sWorkflow)

    {

        $this->sResult .= "<input type=\"hidden\" name=\"input[workflow]\" value=\"" . $sWorkflow . "\">\n";

    }

    

    protected function BuildAction($sAction)

    {

        $this->sResult .= "<input type=\"hidden\" name=\"input[action]\" value=\"" . $sAction . "\">\n";

    }



    public function Render($aMeta, $aData = array())

    {

		$aTimer['Start'] = microtime(true);

		

		$this->sResult = '';

		

        if (empty($aMeta['identity']))

        {

            throw new Exception('No identity specified');

        }



        //empty($aData) && $aData = Session::GetInput($aMeta['identity']);

        $this->SetConfig($aMeta, $aData);



        $sAction = !empty($aMeta['script']) ? $aMeta['script'] : 'form.php';



        $this->sResult .= "<form method=\"post\" ". $this->___GetFormEncoding($aMeta) ." action=\"" . BuildUrl($sAction) ."\" id=\"" . $aMeta['identity'] . "\">\n";

        $this->sResult .= "<table class=\"form\" id=\"" . $aMeta['identity'] . "-table\">\n";

        $this->Build($aMeta);

        $this->sResult .= "</table>\n";



        // Enable Validation for this Form

        $this->sResult .= "

        <script>

        $(document).ready(function()

        {

			$('#" . $aMeta['identity'] . "').validator({

				inputEvent: 	blur,

		    	messageClass:   'validation-error'

    		});

    	});

        </script>

        ";



        $this->sResult .= "</form>\n";



		$aTimer['End'] = microtime(true);

//		$this->sResult .= '<div class="timer">Time taken to generate: ' . ($aTimer['End'] - $aTimer['Start']) . 's </div>';



        return $this->sResult;

    }

}