WP Custom meta fields

<?php
//-------------------------------------------------------------------
//                      custom meta boxes
//-------------------------------------------------------------------

//-------------------------------------
function add_custom_meta_box() {
//-------------------------------------
    add_meta_box(
        'custom_meta_box', // $id
        'Custom Meta Box', // $title

                //----------------------------------
        'show_custom_meta_box',
                //----------------------------------

        'post', // $page
        'normal', // $context
        'high'); // $priority
}
//-------------------------------------
add_action('add_meta_boxes', 'add_custom_meta_box');


$prefix = 'custom_';
//-------------------------------------
$custom_meta_fields = array(
//-------------------------------------
    array(
        'label' => 'Text Input',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'text',
        'type'  => 'text'
    ),
    array(
        'label' => 'Textarea',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'textarea',
        'type'  => 'textarea'
    ),
    array(
        'label' => 'Checkbox Input',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'checkbox',
        'type'  => 'checkbox'
    ),
        //-------------------------------------
    array(
        'label' => 'Select Box',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'select',
        'type'  => 'select',
        'options' => array (
            'one' => array (
                'label' => 'Option One',
                'value' => 'one'
            ),
            'two' => array (
                'label' => 'Option Two',
                'value' => 'two'
            ),
            'three' => array (
                'label' => 'Option Three',
                'value' => 'three'
            )
        )
    ),
        //-------------------------------------
    array (
        'label' => 'Radio Group',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'radio',
        'type'  => 'radio',
        'options' => array (
            'one' => array (
                'label' => 'Option One',
                'value' => 'one'
            ),
            'two' => array (
                'label' => 'Option Two',
                'value' => 'two'
            ),
            'three' => array (
                'label' => 'Option Three',
                'value' => 'three'
            )
        )
    ),
        //-------------------------------------
    array (
        'label' => 'Checkbox Group',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'checkbox_group',
        'type'  => 'checkbox_group',
        'options' => array (
            'one' => array (
                'label' => 'Option One',
                'value' => 'one'
            ),
            'two' => array (
                'label' => 'Option Two',
                'value' => 'two'
            ),
            'three' => array (
                'label' => 'Option Three',
                'value' => 'three'
            )
        )
    ),
        //-------------------------------------
    array(
        'label' => 'Category',
        'id'    => 'category',
        'type'  => 'tax_select'
    ),
    array(
        'label' => 'Post List',
        'desc'  => 'A description for the field.',
        'id'    =>  $prefix.'post_id',
        'type'  => 'post_list',
        'post_type' => array('post','page')
    ),
    array(
        'label' => 'Date',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'date',
        'type'  => 'date'
    ),
    array(
        'label' => 'Slider',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'slider',
        'type'  => 'slider',
        'min'   => '0',
        'max'   => '100',
        'step'  => '5'
    ),
    array(
        'label' => 'Image',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'image',
        'type'  => 'image'
    ),
    array(
        'label' => 'Repeatable',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'repeatable',
        'type'  => 'repeatable'
    )
);

//-------------------------------------
if(is_admin()) {
    wp_enqueue_script('jquery-ui-datepicker');
    wp_enqueue_script('jquery-ui-slider');

    wp_enqueue_script('custom-js',
           get_template_directory_uri().'/js/custom-js.js');

    wp_enqueue_style('jquery-ui-custom',
           get_template_directory_uri().'/css/jquery-ui-custom.css');
}

//-------------------------------------------------
add_action('admin_head','add_custom_scripts');
//-------------------------------------------------
function add_custom_scripts() {
//-------------------------------------------------
    global $custom_meta_fields, $post;

    $output = '<script type="text/javascript">
                jQuery(function() {';

        //-----------------------------------------
    foreach ($custom_meta_fields as $field) {
                //---------------------------------
        if($field['type'] == 'date')
            $output .= 'jQuery(".datepicker").datepicker();';

        //---------------------------------
        if ($field['type'] == 'slider') {

            $value = get_post_meta($post->ID, $field['id'], true);
            if ($value == '') $value = $field['min'];

            $output .= '
                jQuery( "#'.$field['id'].'-slider" ).slider({
                    value: '.$value.',
                    min: '.$field['min'].',
                    max: '.$field['max'].',
                    step: '.$field['step'].',
                    slide: function( event, ui ) {
                                jQuery( "#'.$field['id'].'" ).val( ui.value );
                }});';
        }
    }

    $output .= '});
        </script>';

    echo $output;
}

//-------------------------------------------------
function show_custom_meta_box() {
//-------------------------------------------------
    global $custom_meta_fields, $post;

    echo '<input type="hidden" name="custom_meta_box_nonce" value="'.
                      wp_create_nonce(basename(__FILE__)).'" />';

    echo '<table class="form-table">';
        //-------------------------------------------
    foreach ($custom_meta_fields as $field) {
    //-------------------------------------------
        $meta = get_post_meta($post->ID, $field['id'], true);

        echo '<tr><th><label for="'.$field['id'].'">'.$field['label'].'</label></th><td>';

        switch($field['type']) {
           //-------------------
           case 'text':
                   //-------------------
              echo '<input type="text" name="'.$field['id'].'" id="'.$field['id'].
                      '" value="'.$meta.'" size="30" /><br /><span class="description">'.
                      $field['desc'].'</span>';
              break;

                   //---------------------
           case 'textarea':
                   //---------------------
              echo '<textarea name="'.$field['id'].'" id="'.$field['id'].
                      '" cols="60" rows="4">'.$meta.'</textarea><br />
                      <span class="description">'.$field['desc'].'</span>';
              break;

                   //---------------------
           case 'checkbox':
                   //---------------------
            echo '<input type="checkbox" name="'.$field['id'].'" id="'.
                        $field['id'].'" ',$meta ? ' checked="checked"' : '','/>
            <label for="'.$field['id'].'">'.$field['desc'].'</label>';
            break;

                  //---------------------
          case 'select':
                  //---------------------
            echo '<select name="'.$field['id'].'" id="'.$field['id'].'">';

            foreach ($field['options'] as $option) {
               echo '<option', $meta == $option['value'] ?
                                ' selected="selected"' : '',
                             ' value="'.$option['value'].'">'.$option['label'].'</option>';
            }
                       echo '</select><br /><span class="description">'.
                       $field['desc'].'</span>';
               break;

                  //---------------------
          case 'radio':
                  //---------------------
             foreach ( $field['options'] as $option ) {
                echo '<input type="radio" name="'.$field['id'].
                        '" id="'.$option['value'].'" value="'.$option['value'].
                        '" ',$meta == $option['value'] ? ' checked="checked"' : '',' />

            <label for="'.$option['value'].'">'.$option['label'].'</label><br />';
             }
             echo '<span class="description">'.$field['desc'].'</span>';
             break;

              //----------------------
          case 'checkbox_group':
                  //----------------------
             foreach ($field['options'] as $option) {

                echo '<input type="checkbox" value="'.$option['value'].
                        '" name="'.$field['id'].'[]" id="'.$option['value'].'"',
                         $meta && in_array($option['value'], $meta) ? ' checked="checked"' : '',' />

            <label for="'.$option['value'].'">'.$option['label'].'</label><br />';
            }

            echo '<span class="description">'.$field['desc'].'</span>';
            break;

                  //----------------------
          case 'tax_select':
                  //----------------------
             echo '<select name="'.$field['id'].'" id="'.$field['id'].'">
                <option value="">Select One</option>';
            $terms = get_terms($field['id'], 'get=all');
            $selected = wp_get_object_terms($post->ID, $field['id']);

            foreach ($terms as $term) {
               if (!empty($selected) && !strcmp($term->slug, $selected[0]->slug))
                  echo '<option value="'.$term->slug.'" selected="selected">'.
                                    $term->name.'</option>';
               else
                  echo '<option value="'.$term->slug.'">'.$term->name.'</option>';
            }
            $taxonomy = get_taxonomy($field['id']);
            echo '</select><br /><span class="description"><a href="'.
                        get_bloginfo('home').
                        '/wp-admin/edit-tags.php?taxonomy='.$field['id'].
                        '">Manage '.$taxonomy->label.'</a></span>';
            break;

                  //----------------------
          case 'post_list':
                  //----------------------
             $items = get_posts( array (
                'post_type' => $field['post_type'],
                'posts_per_page' => -1
             ));
            echo '<select name="'.$field['id'].'" id="'.$field['id'].'">
                <option value="">Select One</option>';

            foreach($items as $item) {
               echo '<option value="'.$item->ID.
                            '"',$meta == $item->ID ? ' selected="selected"' : '','>'.
                            $item->post_type.': '.$item->post_title.'</option>';
            }

            echo '</select><br /><span class="description">'.$field['desc'].'</span>';
            break;

                  //----------------------
          case 'date':
                  //----------------------
             echo '<input type="text" class="datepicker" name="'.$field['id'].
                     '" id="'.$field['id'].'" value="'.$meta.'" size="30" />
             <br /><span class="description">'.$field['desc'].'</span>';
          break;

                  //----------------------
          case 'slider':
                  //----------------------
            $value = $meta != '' ? $meta : '0';
                echo '<div id="'.$field['id'].'-slider"></div>
                <input type="text" name="'.$field['id'].'" id="'.$field['id'].
                            '" value="'.$value.'" size="5" />
                <br /><span class="description">'.$field['desc'].'</span>';

            break;


                  //----------------------
          case 'image':
                  //----------------------
             $image = get_template_directory_uri().'/images/image.png';
             echo '<span class="custom_default_image" style="display:none">'.$image.'</span>';
             if ($meta) {
                        $image = wp_get_attachment_image_src($meta, 'medium');
                         $image = $image[0];
                      }

            echo '<input name="'.$field['id'].
                    '" type="hidden" class="custom_upload_image" value="'.$meta.'" />

            <img src="'.$image.'" class="custom_preview_image" alt="" /><br />
            <input class="custom_upload_image_button button"
                    type="button" value="Choose Image" />

            <small>&nbsp;<a href="#" class="custom_clear_image_button">
                    Remove Image</a></small>
            <br clear="all" /><span class="description">'.$field['desc'].'</span>';
           break;

                  //----------------------
          case 'repeatable':
                  //----------------------
             echo '<a class="repeatable-add button" href="#">+</a>
                 <ul id="'.$field['id'].'-repeatable" class="custom_repeatable">';

                $i = 0;
                if ($meta) {
                   foreach($meta as $row) {
                      echo '<li><span class="sort hndle">|||</span>
                      <input type="text" name="'.
                                      $field['id'].'['.$i.']" id="'.$field['id'].
                                      '" value="'.$row.'" size="30" />
                    <a class="repeatable-remove button" href="#">-</a></li>';

                    $i++;
                  }} else {
                    echo '<li><span class="sort hndle">|||</span>
                    <input type="text" name="'.
                                        $field['id'].'['.$i.']" id="'.
                                        $field['id'].'" value="" size="30" />
                    <a class="repeatable-remove button" href="#">-</a></li>';
                  }
                 echo '</ul>
                <span class="description">'.$field['desc'].'</span>';
            break;
                }
        echo '</td></tr>';
    }
    echo '</table>';
}

//-----------------------------------------
function remove_taxonomy_boxes() {
    remove_meta_box('categorydiv', 'post', 'side');
}
//-----------------------------------------
add_action( 'admin_menu' , 'remove_taxonomy_boxes' );

//-----------------------------------------
function save_custom_meta($post_id) {
//-----------------------------------------
    global $custom_meta_fields;

    if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__)))
        return $post_id;

    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
        return $post_id;

    if ('page' == $_POST['post_type']) {
        if (!current_user_can('edit_page', $post_id))
            return $post_id;
        } elseif (!current_user_can('edit_post', $post_id)) {
            return $post_id;
    }
    //-----------------------------------------
    foreach ($custom_meta_fields as $field) {
        //-----------------------------------------
        if($field['type'] == 'tax_select') continue;

        $old = get_post_meta($post_id, $field['id'], true);
        $new = $_POST[$field['id']];

        if ($new && $new != $old) {
            update_post_meta($post_id, $field['id'], $new);
        } elseif ('' == $new && $old) {
            delete_post_meta($post_id, $field['id'], $old);
        }
    }

    // save taxonomies
        //-----------------------------------------
    $post = get_post($post_id);
    $category = $_POST['category'];
    wp_set_object_terms( $post_id, $category, 'category' );
}
add_action('save_post', 'save_custom_meta');

?>

jQuery(function(jQuery) {


    jQuery('#media-items').bind('DOMNodeInserted',function(){
        jQuery('input[value="Insert into Post"]').each(function(){
                jQuery(this).attr('value','Use This Image');
        });
    });

    jQuery('.custom_upload_image_button').click(

             function() {
        formfield = jQuery(this).siblings('.custom_upload_image');
        preview = jQuery(this).siblings('.custom_preview_image');
        tb_show('', 'media-upload.php?type=image&TB_iframe=true');

        window.send_to_editor = function(html) {

            imgurl = jQuery('img',html).attr('src');
            classes = jQuery('img', html).attr('class');
            id = classes.replace(/(.*?)wp-image-/, '');
            formfield.val(id);
            preview.attr('src', imgurl);
            tb_remove();
        }
        return false;
    });

    jQuery('.custom_clear_image_button').click(

          function() {
        var defaultImage = jQuery(this).parent().siblings('.custom_default_image').text();
        jQuery(this).parent().siblings('.custom_upload_image').val('');
        jQuery(this).parent().siblings('.custom_preview_image').attr('src', defaultImage);
        return false;
    });

    jQuery('.repeatable-add').click(

             function() {
        field = jQuery(this).closest('td').find('.custom_repeatable li:last').clone(true);
        fieldLocation = jQuery(this).closest('td').find('.custom_repeatable li:last');
        jQuery('input', field).val('').attr('name', function(index, name) {
            return name.replace(/(\d+)/, function(fullMatch, n) {
                return Number(n) + 1;
            });
        })
        field.insertAfter(fieldLocation, jQuery(this).closest('td'))
        return false;
    });

    jQuery('.repeatable-remove').click(

            function(){
        jQuery(this).parent().remove();
        return false;
    });

    jQuery('.custom_repeatable').sortable({
        opacity: 0.6,
        revert: true,
        cursor: 'move',
        handle: '.sort'
    });

});