checkbox limit

<?php

    /**
     * Tokokoo Framework
     *
     * @category   Tokokoo
     * @package    Tokokoo Themes
     * @copyright  Copyright (c) 2010-2011 Tokokoo
     * @license    http://www.opensource.org/licenses/gpl-2.0.php GNU GPL version 2
     * @version    $Id:$
     *
     * @developer Onnay Okheng (@onnayokheng)
     */

// Do not delete these lines
if (!empty($_SERVER['SCRIPT_FILENAME']) && 'functions.php' == basename($_SERVER['SCRIPT_FILENAME']))
	die('Please do not load this page directly. Thanks!');

function wp_debug($variable, $die = false) {
	echo '<pre>' . print_r($variable, true) . '</pre>';
	if ($die)
		die();
}

################################################################################
// Add theme panels
################################################################################

include 'resources/path.php';
require_once ('admin/admin-functions.php');
require_once ('admin/admin-interface.php');
require_once ('admin/theme-options.php');
require_once ('admin/theme-functions.php');
include_once ('admin/theme-enqueue.php');
include_once ('functions/themes-shortcode.php'); // include shortcode library.
include_once ('resources/core.php');



################################################################################
// Add theme sidebars
################################################################################

if (function_exists('register_sidebar')) {
	register_sidebar(array(
		'name' => __('Blog Sidebar'),
		'description' => 'This widget appears on the blog sidebar',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
	register_sidebar(array(
		'name' => __('Bottom Left'),
		'description' => 'This widget appears on the bottom area above footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
	register_sidebar(array(
		'name' => __('Bottom Center Left'),
		'description' => 'This widget appears on the bottom area above footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
	register_sidebar(array(
		'name' => __('Bottom Center Right'),
		'description' => 'This widget appears on the bottom area above footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
	register_sidebar(array(
		'name' => __('Bottom Right'),
		'description' => 'This widget appears on the bottom area above footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
	register_sidebar(array(
		'name' => __('Product Sidebar'),
		'description' => 'This widget appears on the single product sidebar',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget' => '</div>',
		'before_title' => '<p class="widget-title">',
		'after_title' => '</p>',
	));
}

################################################################################
// Add theme support
################################################################################

if (function_exists('add_theme_support')) {
	add_theme_support('post-thumbnails');
	set_post_thumbnail_size(150, 150, true); // Normal post thumbnails
//	add_theme_support('post-formats', array('aside', 'gallery')); // Post Format support. You can also use the legacy "gallery" or "asides" (note the plural) categories.
	add_image_size('slider', 1250, 500, true); // slider
	add_image_size('blog', 462, 341, true); // blog
	add_image_size('best-big', 735, 570, true); // home best seller big
	add_image_size('best-landscape', 515, 300, true); // home best seller / sale landscape
	add_image_size('sale-portrait', 250, 570, true); // sale portrait

	add_theme_support('automatic-feed-links');	// Add default posts and comments RSS feed links to head
//	add_custom_background(); // Add custom background functions
	add_theme_support('custom-background');; // Add custom background functions
}

function show_posts_nav() {
	global $wp_query;
	return ($wp_query->max_num_pages > 1);
}



################################################################################
// Configure WP2.9+ Navigation Menus
################################################################################

register_nav_menus(
        array(
            'header' => __('Header Menu', 'tokokoo'),
            'footer' => __('Footer Menu', 'tokokoo')
));



################################################################################
// Fixing the Read More in the Excerpts
// This removes the annoying [?] to a Read More link
################################################################################

function tk_excerpt_more($more) {
	global $post;
	// edit here if you like
//	return '&nbsp; <a href="'. get_permalink($post->ID) . '" title="Read more '.get_the_title($post->ID).'">Read more &rarr;</a>';
	return '&nbsp; <a href="'. get_permalink($post->ID) . '" title="' . sprintf(__('Read more %s', 'tokokoo'), get_the_title($post->ID)) .'">'. __('Read more &rarr;', 'tokokoo') . '</a>';
}
add_filter('excerpt_more', 'tk_excerpt_more');



################################################################################
// Disable plugin update
################################################################################

add_filter('site_transient_update_plugins', 'tk_remove_update_plugin');
function tk_remove_update_plugin($value) {

	$removed = 'woocommerce/woocommerce.php';
	if (isset($value->checked[$removed])) {
		unset($value->checked[$removed]);
	}

	return $value;
}

add_filter('http_request_args', 'tk_prevent_plugin_update', 10, 2);
function tk_prevent_plugin_update($r, $url) {

	if (0 === strpos($url, 'http://api.wordpress.org/plugins/update-check/')) {

		$removed = 'woocommerce/woocommerce.php';
		$plugins = unserialize($r['body']['plugins']);
		unset($plugins->plugins[$removed]);
		unset($plugins->active[array_search($removed, $plugins->active)]);
		$r['body']['plugins'] = serialize($plugins);
	}

	return $r;
}



################################################################################
// Actions + Filters
################################################################################

// Remove links to the extra feeds (e.g. category feeds)
remove_action( 'wp_head', 'feed_links_extra', 3 );
// Remove links to the general feeds (e.g. posts and comments)
remove_action( 'wp_head', 'feed_links', 2 );
// Remove link to the RSD service endpoint, EditURI link
remove_action( 'wp_head', 'rsd_link' );
// Remove link to the Windows Live Writer manifest file
remove_action( 'wp_head', 'wlwmanifest_link' );
// Remove index link
remove_action( 'wp_head', 'index_rel_link' );
// Remove prev link
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
// Remove start link
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 );
// Display relational links for adjacent posts
remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 );
// Remove XHTML generator showing WP version
remove_action( 'wp_head', 'wp_generator' );






?>




<?php

/**
* Limit How Many Checkboxes Can Be Checked
* http://gravitywiz.com/2012/06/11/limiting-how-many-checkboxes-can-be-checked/
*/

class GFLimitCheckboxes {

    public static $field_limits;

    function __construct($form_id, $field_limits) {

        $this->field_limits = $field_limits;

        add_filter("gform_pre_render_$form_id", array(&$this, 'pre_render'));
        add_filter("gform_validation_$form_id", array(&$this, 'validate'));

    }

    function pre_render($form) {

        $script = '';
        $output_script = false;

        foreach($form['fields'] as $field) {

            $field_id = $field['id'];

            if( !array_key_exists($field['id'], $this->field_limits)    // if field limits not provided for this field
                || RGFormsModel::get_input_type($field) != 'checkbox'   // or if this field is not a checkbox
                || !isset($this->field_limits[$field_id]['max'])         // or if 'max' is not set for this field
                )
                continue;

            $output_script = true;
            $max = $this->field_limits[$field_id]['max'];

            $script .= "jQuery(\"#field_{$form['id']}_{$field['id']} .gfield_checkbox input:checkbox\").checkboxLimit({$max});";

        }

        GFFormDisplay::add_init_script($form['id'], 'limit_checkboxes', GFFormDisplay::ON_PAGE_RENDER, $script);

        if($output_script):
            ?>

<script type="text/javascript">
    jQuery(document).ready(function($) {
    $.fn.checkboxLimit = function(n) {

    var checkboxes = this;

    this.toggleDisable = function() {

    // if we have reached or exceeded the limit, disable all other checkboxes
    if(this.filter(':checked').length >= n) {
    var unchecked = this.not(':checked');
    unchecked.prop('disabled', true);
    }
    // if we are below the limit, make sure all checkboxes are available
    else {
    this.prop('disabled', false);
    }

    }

    // when form is rendered, toggle disable
    checkboxes.bind('gform_post_render', checkboxes.toggleDisable());

    // when checkbox is clicked, toggle disable
    checkboxes.click(function(event) {

    checkboxes.toggleDisable();

    // if we are equal to or below the limit, the field should be checked
    return checkboxes.filter(':checked').length <= n;
    });

    }
    });
</script>

<?php
        endif;

        return $form;
    }

    function validate($validation_result) {

        $form = $validation_result['form'];

        foreach($form['fields'] as &$field) {

            if(!$this->should_field_be_validated($form, $field))
                continue;

            $field_id = $field['id'];
            $min = isset($this->field_limits[$field_id]['min']) ? $this->field_limits[$field_id]['min'] : false;
            $max = isset($this->field_limits[$field_id]['max']) ? $this->field_limits[$field_id]['max'] : false;
            $count = 0;

            foreach($_POST as $key => $value) {
                if(strpos($key, "input_{$field_id}_") !== false)
                    $count++;
            }

            if($count < $min) {
                $field['failed_validation'] = true;
                $field['validation_message'] = sprintf( _n('You must select at least %s item.', 'You must select at least %s items.', $min), $min );
                $validation_result['is_valid'] = false;
            }
            else if($count > $max) {
                $field['failed_validation'] = true;
                $field['validation_message'] = sprintf( _n('You may only select %s item.', 'You may only select %s items.', $max), $max );
                $validation_result['is_valid'] = false;
            }

        }

        $validation_result['form'] = $form;

        return $validation_result;
    }


    function should_field_be_validated($form, $field) {

        // if no limits provided for this field
        if( !array_key_exists($field['id'], $this->field_limits) )
            return false;

        // or if this field is not a checkbox
        if( RGFormsModel::get_input_type($field) != 'checkbox' )
            return false;

        // or if this field is hidden
        if( RGFormsModel::is_field_hidden($form, $field, array()) )
            return false;

        return true;
    }

}

new GFLimitCheckboxes(5, array(
    5 => array(
        'min' => 2,
        'max' => 3
        ),
    6 => array(
        'max' => 3
        )
    ));