custom post types

<?php
class DCMerch {

    function DCMerch() {
        add_action("init", array(&$this, "merch_init"));
        add_action("admin_init", array(&$this, "merch_admin_init"));
    }

    function merch_init()
    {
        register_post_type('Merch', array(
            'label' => 'Merch',
            'public' => true,
            'show_ui' => true,
            '_builtin' => false,
            'capability_type' => 'post',
            'hierarchical' => false,
            'menu_position' => 5,
            'rewrite' => array('slug' => 'merch'),
            'supports' => array('title')
        ));

        register_taxonomy('client', 'Merch',
            array(
                 'hierarchical' => false,
                 'label' => 'Clients',
                 'singular_label' => 'Client',
                 'query_var' => 'client',
                 'show_ui' => false,
                 'rewrite' => array('slug' => 'client' )
            )
        );

        add_action("template_redirect", 'merch_template_redirect');
    }

    function merch_admin_init()
    {
        add_filter("manage_edit-Merch_columns", array(&$this, "edit_merch_columns"));
        add_action("manage_posts_custom_column", array(&$this, "custom_columns"));

        // Custom meta boxes for the edit merch screen
        add_meta_box("merch-meta", "Merch Options", array(&$this, "merch_meta_options"), "Merch", "advanced", "high");
        add_action('save_post','save_merch_meta');
    }

    //Defines the columns for the merch post type
    function edit_merch_columns($columns)
    {
        $columns = array(
            "cb" => "<input type=\"checkbox\" />",
            "title" => "Title",
            "client" => "Client",
            "thumb" => "Thumbnail",
            "date" => "Date"
        );

        return $columns;
    }

    //Outputs custom columns depending on the type
    function custom_columns($column)
    {
        global $post;
        $meta = get_post_meta($post->ID,'_merch',TRUE);
        $client = wp_get_post_terms($post->ID, 'client');
        if ($client == null || count($client) != 1)
            $client = '';
        else
            $client = $client[0]->name;
        switch ($column)
        {
            case "thumb":
                echo $meta['imageurl'];
                break;
            case "client":
                echo $client;
                break;
        }
    }

    // Admin post meta contents
    function merch_meta_options()
    {
        global $post;

        $meta = get_post_meta($post->ID,'_merch',TRUE);
        $client = wp_get_post_terms($post->ID, 'client');
        if ($client == null || count($client) != 1)
            $client = '';
        else
            $client = $client[0]->name;

        include('merch_meta.php');

        echo '<input type="hidden" name="_merch_noncename" value="' . wp_create_nonce(plugin_basename(__FILE__)) . '" />';
    }
}

function merch_template_redirect()
{
    global $wp;
    if (array_key_exists('merch', $wp->query_vars)) {
        include(TEMPLATEPATH . "/merch.php");
        die();
    }
}

function save_merch_meta($post_id)
{
    // authentication checks

    // make sure data came from our meta box
    if (!wp_verify_nonce($_POST['_merch_noncename'],plugin_basename(__FILE__))) return $post_id;

    // check user permissions
    if ($_POST['post_type'] == 'page')
    {
        if (!current_user_can('edit_page', $post_id)) return $post_id;
    }
    else
    {
        if (!current_user_can('edit_post', $post_id)) return $post_id;
    }

    // authentication passed, save data

    $data = get_post_meta($post_id, '_merch', TRUE);

    $new_data = $_POST['_merch'];

    foreach ($new_data as $n => $v)
    {
        if ($n == 'client') {
            if (trim($v) != '') {
                wp_set_post_terms($post_id, trim($v), 'client');
            }
            unset($new_data[$n]);
        }
        else if ($n == 'imagepath') {
            if ($new_data[$n] != $data[$n])
            {
                $attachment = array(
                    'post_title' => 'file'. time(),
                    'post_content' => '',
                    'post_type' => 'attachment',
                    'post_parent' => $post_id,
                    'post_mime_type' => 'image/jpeg'
                );

                $attach_id = wp_insert_attachment( $attachment, $new_data[$n], $post_id );
                $attach_data = wp_generate_attachment_metadata( $attach_id, $new_data[$n] );
                wp_update_attachment_metadata( $attach_id,  $attach_data );
            }
        }
        else
        {
            if (is_array($v))
            {
                foreach ($new_data[$n] as $nn => $vv)
                {
                    if (trim($vv) === '') unset($new_data[$n][$nn]);
                }
            }
            else
            {
                if (trim($v) === '') unset($new_data[$n]);
            }
        }
    }

    if ($data) update_post_meta($post_id, '_merch', $new_data);
    else add_post_meta($post_id, '_merch', $new_data, TRUE);
}

new DCMerch();