<?php
/* SVN FILE: $Id$ */

/**
 * Automatic generation of HTML FORMs from given data.
 *
 * Used for scaffolding.
 *
 * PHP versions 4 and 5
 *
 * CakePHP :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright (c) 2006, Cake Software Foundation, Inc.
 *                     1785 E. Sahara Avenue, Suite 490-204
 *                     Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright    Copyright (c) 2006, Cake Software Foundation, Inc.
 * @link         http://www.cakefoundation.org/projects/info/cakephp CakePHP Project
 * @package      cake
 * @subpackage   cake.cake.libs.view.helpers
 * @since        CakePHP v 0.10.0.1076
 * @version      $Revision$
 * @modifiedby   $LastChangedBy$
 * @lastmodified $Date$
 * @license      http://www.opensource.org/licenses/mit-license.php The MIT License
 */


/**
 * Tag template for a div.
 */
define('TAG_DIV', '<div class="%s">%s</div>');

/**
 * Tag template for a div.
 */
define('TAG_P_CLASS', '<p class="%s">%s</p>');

/**
 * Tag template for a label.
 */
define('TAG_LABEL', '<label for="%s">%s</label>');

/**
 * Tag template for a fieldset.
 */
define('TAG_FIELDSET', '<fieldset><legend>%s</legend>%s</label>');

/**
 * Form helper library.
 *
 * Automatic generation of HTML FORMs from given data.
 *
 * @package    cake
 * @subpackage cake.cake.libs.view.helpers
 * @since      CakePHP v 0.10.0.1076
 *
 */
class FormHelper extends Helper
{

    var $helpers = array('Html');
 /**
 * Constructor which takes an instance of the HtmlHelper class.
 *
 * @param object $htmlHelper  the HtmlHelper object to use as our helper.
 * @return void
 */
    function FormHelper()
    {
    }

 /**
 * Returns a formatted error message for given FORM field, NULL if no errors.
 *
 * @param string $field      If field is to be used for CRUD, this should be modelName/fieldName
 * @return bool             If there are errors this method returns true, else false.
 */
    function isFieldError($field )
    {
        $error = 1;
        $this->Html->setFormTag( $field );
        if( $error == $this->Html->tagIsInvalid( $this->Html->model, $this->Html->field) )
        {
            return true;
        } else {
            return false;
        }
    }

 /**
 * Returns a formatted LABEL element for HTML FORMs.
 *
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $text         Text that will appear in the label field.
 * @return string             The formatted LABEL element
 */
    function labelTag( $tagName, $text )
    {
        return sprintf( TAG_LABEL, strtolower(str_replace('/', '_',$tagName)), $text );
    }

 /**
 * Returns a formatted DIV tag for HTML FORMs.
 *
 * @param string $class     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $text         Text that will appear in the label field.
 * @return string             The formatted DIV element
 */
    function divTag( $class, $text )
    {
        return sprintf( TAG_DIV, $class, $text );
    }

 /**
 * Returns a formatted P tag with class for HTML FORMs.
 *
 * @param string $class     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $text         Text that will appear in the label field.
 * @return string             The formatted DIV element
 */
    function pTag( $class, $text )
    {
        return sprintf( TAG_P_CLASS, $class, $text );
    }

 /**
 * Returns a formatted INPUT tag for HTML FORMs.
 *
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt     Text that will appear in the label field.
 * @param bool $required     True if this field is required.
 * @param string $errorMsg     Text that will appear if an error has occurred.
 * @param int $size         Size attribute for INPUT element
 * @param array $htmlOptions
 * @return string             The formatted INPUT element
 */
    function generateInputDiv($tagName, $prompt, $required=false, $errorMsg=null, $size=20, $htmlOptions=null )
    {
        $htmlOptions['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->inputTag( $tagName, $size, $htmlOptions );
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        return $this->divTag( $divClass, $divTagInside );

    }

 /**
 * Returns a formatted CHECKBOX tag inside a DIV for HTML FORMs.
 *
 * @param HtmlHelper $html     The HtmlHelper object which is creating this form.
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt     Text that will appear in the label field.
 * @param bool $required     True if this field is required.
 * @param string $errorMsg     Text that will appear if an error has occurred.
 * @param int $size         Size attribute for INPUT element
 * @param array $htmlOptions
 * @return string             The formatted INPUT element
 */
    function generateCheckboxDiv($tagName, $prompt, $required=false, $errorMsg=null, $htmlOptions=null )
    {
        $htmlOptions['class'] = "inputCheckbox";
        $htmlOptions['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->checkbox( $tagName, null, $htmlOptions );
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        return $this->divTag( $divClass, $divTagInside );

    }

 /**
 * Returns a formatted date option element for HTML FORMs.
 *
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt     Text that will appear in the label field.
 * @param bool $required     True if this field is required.
 * @param string $errorMsg     Text that will appear if an error has occurred.
 * @param int $size         Size attribute for INPUT element
 * @param array $htmlOptions
 * @return string             The formatted INPUT element
 */
    function generateDate($tagName, $prompt, $required=false, $errorMsg=null, $size=20, $htmlOptions=null, $selected )
    {
        $htmlOptions['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->dateTimeOptionTag( $tagName, 'MDY' , 'NONE', $selected,  $htmlOptions);
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        $requiredDiv = $this->divTag( $divClass, $divTagInside );

        return $this->divTag("date", $requiredDiv);
    }

 /**
 * Returns a formatted datetime option element for HTML FORMs.
 *
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt     Text that will appear in the label field.
 * @param bool $required     True if this field is required.
 * @param string $errorMsg     Text that will appear if an error has occurred.
 * @param int $size         Size attribute for INPUT element
 * @param array $htmlOptions
 * @return string             The formatted datetime option element
 */
    function generateDateTime($tagName, $prompt, $required=false, $errorMsg=null, $size=20, $htmlOptions=null, $selected = null )
    {
        $htmlOptions['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->dateTimeOptionTag( $tagName, 'MDY' , '12', $selected,  $htmlOptions);
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        $requiredDiv = $this->divTag( $divClass, $divTagInside );

        return $this->divTag("date", $requiredDiv);
    }

 /**
 * Returns a formatted TEXTAREA inside a DIV for use with HTML forms.
 *
 * @param string $tagName    If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt    Text that will appear in the label field.
 * @param boolean $required    True if this field is required.
 * @param string $errorMsg    ext that will appear if an error has occurred.
 * @param integer $cols        Number of columns.
 * @param integer $rows        Number of rows.
 * @param array $htmlOptions
 * @return string             The formatted TEXTAREA element
 */
    function generateAreaDiv($tagName, $prompt, $required=false, $errorMsg=null, $cols=60, $rows=10,  $htmlOptions=null )
    {
        $htmlOptions['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->areaTag( $tagName, $cols, $rows, $htmlOptions );
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        return $this->divTag( $divClass, $divTagInside );

    }

 /**
 * Returns a formatted SELECT tag for HTML FORMs.
 *
 * @param string $tagName     If field is to be used for CRUD, this should be modelName/fieldName
 * @param string $prompt     Text that will appear in the label field
 * @param array $options     Options to be contained in SELECT element
 * @param string $selected     Text of the currently selected item
 * @param array $selectAttr    Array of HTML attributes for the SELECT element
 * @param array $optionAttr Array of HTML attributes for the OPTION elements
 * @param bool $required     True if this field is required
 * @param string $errorMsg     Text that will appear if an error has occurred
 * @return string             The formatted INPUT element
 */
    function generateSelectDiv($tagName, $prompt, $options, $selected=null, $selectAttr=null, $optionAttr=null, $required=false,  $errorMsg=null)
    {
        $selectAttr['id'] = strtolower(str_replace('/', '_',$tagName));;
        $str = $this->Html->selectTag( $tagName, $options, $selected, $selectAttr, $optionAttr );
        $strLabel = $this->labelTag( $tagName, $prompt );

        $divClass = "optional";

        if( $required )
        $divClass = "required";

        $strError = ""; // initialize the error to empty.

        if( $this->isFieldError( $tagName ) )
        {
            // if it was an error that occured, then add the error message, and append " error" to the div tag.
            $strError = $this->pTag( 'error', $errorMsg );
            $divClass = sprintf( "%s error", $divClass );
        }
        $divTagInside = sprintf( "%s %s %s", $strError, $strLabel, $str );

        return $this->divTag( $divClass, $divTagInside );

    }

 /**
 * Returns a formatted submit widget for HTML FORMs.
 *
 * @param string $prompt     Text that will appear on the widget
 * @param array $htmlOptions
 * @return string             The formatted submit widget
 */
    function generateSubmitDiv($displayText, $htmlOptions = null)
    {
        return $this->divTag( 'submit', $this->Html->submitTag( $displayText, $htmlOptions) );
    }

 /**
 * Generates a form to go onto a HtmlHelper object.
 *
 * @param array $fields     An array of form field definitions
 * @param boolean $readOnly    True if the form should be rendered as READONLY
 * @return string             The completed form specified by the $fields parameter
 */
    function generateFields( $fields, $readOnly = false )
    {
        $strFormFields = '';
        foreach( $fields as $field )
        {
            if(isset( $field['type']))
            {
                if(!isset($field['required']))
                {
                    $field['required'] = false;
                }
                if(!isset( $field['errorMsg']))
                {
                    $field['errorMsg'] = null;
                }
                if(!isset( $field['htmlOptions']))
                {
                    $field['htmlOptions'] = array();
                }
                if( $readOnly )
                {
                    $field['htmlOptions']['READONLY'] = "readonly";
                }

                switch( $field['type'] )
                {
                    case "input" :
                        if( !isset( $field['size'] ) )
                        {
                            $field['size'] = 40;
                        }
                        $strFormFields = $strFormFields.$this->generateInputDiv( $field['tagName'], $field['prompt'], $field['required'], $field['errorMsg'], $field['size'], $field['htmlOptions'] );
                    break;
                    case "checkbox" :
                        $strFormFields = $strFormFields.$this->generateCheckboxDiv( $field['tagName'], $field['prompt'], $field['required'], $field['errorMsg'], $field['htmlOptions'] );
                    break;
                    case "select";
                    case "selectMultiple";
                        if( "selectMultiple" == $field['type'] )
                        {
                            $field['selectAttr']['multiple'] = 'multiple';
                            $field['selectAttr']['class'] = 'selectMultiple';
                        }
                        if(!isset( $field['selected']))
                        {
                            $field['selected'] = null;
                        }
                        if(!isset( $field['selectAttr']))
                        {
                            $field['selectAttr'] = null;
                        }
                        if(!isset( $field['optionsAttr']))
                        {
                            $field['optionsAttr'] = null;
                        }
                        if($readOnly)
                        {
                            $field['selectAttr']['DISABLED'] = true;
                        }
                        if(!isset( $field['options']))
                        {
                            $field['options'] = null;
                        }
                        $strFormFields = $strFormFields.$this->generateSelectDiv( $field['tagName'], $field['prompt'], $field['options'], $field['selected'], $field['selectAttr'], $field['optionsAttr'], $field['required'], $field['errorMsg'] );
                    break;
                    case "area";
                        if(!isset( $field['rows']))
                        {
                            $field['rows'] = 10;
                        }
                        if(!isset( $field['cols']))
                        {
                            $field['cols'] = 60;
                        }
                        $strFormFields = $strFormFields.$this->generateAreaDiv( $field['tagName'], $field['prompt'], $field['required'], $field['errorMsg'], $field['cols'], $field['rows'], $field['htmlOptions'] );
                    break;
                    case "fieldset";

                        $strFieldsetFields = $this->generateFields( $field['fields'] );
                        $strFieldSet = sprintf( '
                        <fieldset><legend>%s</legend><div class="notes"><h4>%s</h4><p class="last">%s</p></div>%s</fieldset>',
                        $field['legend'], $field['noteHeading'], $field['note'], $strFieldsetFields );
                        $strFormFields = $strFormFields.$strFieldSet;
                    break;
                    case "hidden";
                        $strFormFields = $strFormFields . $this->Html->hiddenTag( $field['tagName']);
                    break;
                    case "date":
                        if( !isset( $field['selected']))
                        {
                            $field['selected'] = null;
                        }
                        $strFormFields = $strFormFields.$this->generateDate( $field['tagName'], $field['prompt'], null, null, null, null, $field['selected']);
                    break;
                    case "datetime":
                        if( !isset( $field['selected']))
                        {
                            $field['selected'] = null;
                        }
                        $strFormFields = $strFormFields.$this->generateDateTime( $field['tagName'], $field['prompt'], '','','', '', $field['selected']);
                    break;
                    default:
                    break;
                }
            }
        }
        return $strFormFields;
    }
}
?>