开源欣赏wordpress之post.php

switch($action) {
case 'postajaxpost':
case 'post':
case 'post-quickpress-publish':
case 'post-quickpress-save':
    check_admin_referer('add-' . $post_type);

    if ( 'post-quickpress-publish' == $action )
        $_POST['publish'] = 'publish'; // tell write_post() to publish

    if ( 'post-quickpress-publish' == $action || 'post-quickpress-save' == $action ) {
        $_POST['comment_status'] = get_option('default_comment_status');
        $_POST['ping_status'] = get_option('default_ping_status');
        $post_id = edit_post();
    } else {
        $post_id = 'postajaxpost' == $action ? edit_post() : write_post();
    }

     === strpos( $action, 'post-quickpress' ) ) {
        $_POST['post_ID'] = $post_id;
        // output the quickpress dashboard widget
        require_once(ABSPATH . 'wp-admin/includes/dashboard.php');
        wp_dashboard_quick_press();
        exit;
    }

    redirect_post($post_id);
    exit();
    break;

case 'edit':
    $editing = true;

    if ( empty( $post_id ) ) {
        wp_redirect( admin_url('post.php') );
        exit();
    }

    if ( ! $post )
        wp_die( __( 'You attempted to edit an item that doesn’t exist. Perhaps it was deleted?' ) );

    if ( ! $post_type_object )
        wp_die( __( 'Unknown post type.' ) );

    if ( ! current_user_can( 'edit_post', $post_id ) )
        wp_die( __( 'You are not allowed to edit this item.' ) );

    if ( 'trash' == $post->post_status )
        wp_die( __( 'You can’t edit this item because it is in the Trash. Please restore it and try again.' ) );

    if ( ! empty( $_GET['get-post-lock'] ) ) {
        wp_set_post_lock( $post_id );
        wp_redirect( get_edit_post_link( $post_id, 'url' ) );
        exit();
    }

    $post_type = $post->post_type;
    if ( 'post' == $post_type ) {
        $parent_file = "edit.php";
        $submenu_file = "edit.php";
        $post_new_file = "post-new.php";
    } elseif ( 'attachment' == $post_type ) {
        $parent_file = 'upload.php';
        $submenu_file = 'upload.php';
        $post_new_file = 'media-new.php';
    } else {
        if ( isset( $post_type_object ) && $post_type_object->show_in_menu && $post_type_object->show_in_menu !== true )
            $parent_file = $post_type_object->show_in_menu;
        else
            $parent_file = "edit.php?post_type=$post_type";
        $submenu_file = "edit.php?post_type=$post_type";
        $post_new_file = "post-new.php?post_type=$post_type";
    }

    if ( ! wp_check_post_lock( $post->ID ) ) {
        $active_post_lock = wp_set_post_lock( $post->ID );

        if ( 'attachment' !== $post_type )
            wp_enqueue_script('autosave');
    }

    if ( is_multisite() ) {
        add_action( 'admin_footer', '_admin_notice_post_locked' );
    } else {
        $check_users = get_users( array(  ) );

         )
            add_action( 'admin_footer', '_admin_notice_post_locked' );

        unset( $check_users );
    }

    $title = $post_type_object->labels->edit_item;
    $post = get_post($post_id, OBJECT, 'edit');

    if ( post_type_supports($post_type, 'comments') ) {
        wp_enqueue_script('admin-comments');
        enqueue_comment_hotkeys_js();
    }

    include( ABSPATH . 'wp-admin/edit-form-advanced.php' );

    break;

case 'editattachment':
    check_admin_referer('update-post_' . $post_id);

    // Don't let these be changed
    unset($_POST['guid']);
    $_POST['post_type'] = 'attachment';

    // Update the thumbnail filename
    $newmeta = wp_get_attachment_metadata( $post_id, true );
    $newmeta['thumb'] = $_POST['thumb'];

    wp_update_attachment_metadata( $post_id, $newmeta );

case 'editpost':
    check_admin_referer('update-post_' . $post_id);

    $post_id = edit_post();

    // Session cookie flag that the post was saved
    if ( isset( $_COOKIE['wp-saving-post-' . $post_id] ) )
        setcookie( 'wp-saving-post-' . $post_id, 'saved' );

    redirect_post($post_id); // Send user on their way while we keep working

    exit();
    break;

case 'trash':
    check_admin_referer('trash-post_' . $post_id);

    if ( ! $post )
        wp_die( __( 'The item you are trying to move to the Trash no longer exists.' ) );

    if ( ! $post_type_object )
        wp_die( __( 'Unknown post type.' ) );

    if ( ! current_user_can( 'delete_post', $post_id ) )
        wp_die( __( 'You are not allowed to move this item to the Trash.' ) );

    if ( $user_id = wp_check_post_lock( $post_id ) ) {
        $user = get_userdata( $user_id );
        wp_die( sprintf( __( 'You cannot move this item to the Trash. %s is currently editing.' ), $user->display_name ) );
    }

    if ( ! wp_trash_post( $post_id ) )
        wp_die( __( 'Error in moving to Trash.' ) );

    wp_redirect( add_query_arg( array(, 'ids' => $post_id), $sendback ) );
    exit();
    break;

case 'untrash':
    check_admin_referer('untrash-post_' . $post_id);

    if ( ! $post )
        wp_die( __( 'The item you are trying to restore from the Trash no longer exists.' ) );

    if ( ! $post_type_object )
        wp_die( __( 'Unknown post type.' ) );

    if ( ! current_user_can( 'delete_post', $post_id ) )
        wp_die( __( 'You are not allowed to move this item out of the Trash.' ) );

    if ( ! wp_untrash_post( $post_id ) )
        wp_die( __( 'Error in restoring from Trash.' ) );

    wp_redirect( add_query_arg(, $sendback) );
    exit();
    break;

case 'delete':
    check_admin_referer('delete-post_' . $post_id);

    if ( ! $post )
        wp_die( __( 'This item has already been deleted.' ) );

    if ( ! $post_type_object )
        wp_die( __( 'Unknown post type.' ) );

    if ( ! current_user_can( 'delete_post', $post_id ) )
        wp_die( __( 'You are not allowed to delete this item.' ) );

    $force = ! EMPTY_TRASH_DAYS;
    if ( $post->post_type == 'attachment' ) {
        $force = ( $force || ! MEDIA_TRASH );
        if ( ! wp_delete_attachment( $post_id, $force ) )
            wp_die( __( 'Error in deleting.' ) );
    } else {
        if ( ! wp_delete_post( $post_id, $force ) )
            wp_die( __( 'Error in deleting.' ) );
    }

    wp_redirect( add_query_arg(, $sendback) );
    exit();
    break;

case 'preview':
    check_admin_referer( 'autosave', 'autosavenonce' );

    $url = post_preview();

    wp_redirect($url);
    exit();
    break;

default:
    wp_redirect( admin_url('edit.php') );
    exit();
    break;
} // end switch

这里针对不同的action进行不同的操作。

check_admin_referer('untrash-post_' . $post_id);

    if ( ! $post )
        wp_die( __( 'The item you are trying to restore from the Trash no longer exists.' ) );

    if ( ! $post_type_object )
        wp_die( __( 'Unknown post type.' ) );

    if ( ! current_user_can( 'delete_post', $post_id ) )
        wp_die( __( 'You are not allowed to move this item out of the Trash.' ) );

    if ( ! wp_untrash_post( $post_id ) )
        wp_die( __( 'Error in restoring from Trash.' ) );

    wp_redirect( add_query_arg(, $sendback) );
    exit();
    break;

点评：采用这种写法，统一。同时也非常的美观。if嵌套太多的代码不是好代码。