<?php # -*- coding: utf-8 -*-
/**
 * Plugin Name: Report Broken Video
 * Text Domain: plugin_rbv
 * Domain Path: /lang
 * Description: Adds a button to report broken videos
 * Version:     2012.02.15
 * Required:    3.3
 * Author:      Thomas Scholz
 * Author URI:  http://toscho.de
 * License:     GPL
 *
 *
 * Report Broken Video, Copyright (C) 2012 Thomas Scholz
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

! defined( \'ABSPATH\' ) and exit;

add_action( \'after_setup_theme\', array ( \'Report_Broken_Video\', \'init\' ) );

class Report_Broken_Video
{
    /**
     * Internal variables prefix.
     *
     * @type string
     */
    protected $prefix = \'rbv\';
    /**
     * Name for a field that is hidden per CSS and filled by spammers only.
     *
     * @type string
     */
    protected $hidden_field = \'no_fill\';

    /**
     * URL of the current page.
     *
     * @see __construct()
     * @type string
     */
    protected $current_url = \'\';

    /**
     * nonce = number used once, unique identifier for request validation.
     *
     * @type string
     */
    protected $nonce_name = \'rbv_nonce\';

    /**
     * On which post types do we want to show the form?
     *
     * @type array
     */
    protected $post_types = array ( \'post\' );

    /**
     * Creates a new instance. Called on \'after_setup_theme\'.
     *
     * @see    __construct()
     * @return void
     */
    public static function init()
    {
        new self;
    }

    /**
     * Set actions, filters and basic variables, load language.
     *
     * @uses apply_filters() \'rbv_button\' as action name
     *      \'rbv_auto_add_button\' to append the form automatically
     *      \'rbv_post_types\' for supported post types (default: \'post\')
     */
    public function __construct()
    {
        add_action( $this->prefix . \'_button\', array ( $this, \'print_button\' ) );
        $auto_add = apply_filters( $this->prefix . \'_auto_add_button\', TRUE );
        $auto_add and add_filter( \'the_content\', array ( $this, \'append_button\' ), 50 );

        $this->current_url = $_SERVER[\'REQUEST_URI\'];
        $this->post_types  = apply_filters(
            $this->prefix . \'_post_types\',
            $this->post_types
        );

        $lang_loaded       = load_plugin_textdomain(
            \'plugin_rbv\',
            FALSE,
            basename( __DIR__ ) . \'/lang\'
        );
    }

    /**
     * Handler for the action \'rbv_button\'. Prints the button.
     *
     * @return void
     */
    public function print_button()
    {
        print $this->button_form();
    }

    /**
     * Handler for content filter.
     *
     * @param  string $content Existing content
     * @return string
     */
    public function append_button( $content )
    {
        return $content . $this->button_form();
    }

    /**
     * Returns the button form or a feedback message after submit.
     *
     * @return string
     */
    public function button_form()
    {
        if ( \'POST\' != $_SERVER[\'REQUEST_METHOD\'] )
        {
            return $this->get_form();
        }
        return $this->handle_submit();
    }

    /**
     * Returns the form or an empty string.
     *
     * @uses apply_filters() \'rbv_show_form\' to suppress form output.
     * @return string
     */
    public function get_form()
    {
        global $post;

        if ( empty ( $post )
            or ! in_array( get_post_type( $post ), $this->post_types )
            // You may disable the form conditionally. For example: restrict it
            // to posts with post-format \'video\'.
            or ! apply_filters( $this->prefix . \'_show_form\', TRUE, $post )
        )
        {
            return \'\';
        }
        $post_id = (int) $post->ID;

        $url          = esc_attr( $this->current_url );
        $hidden       = $this->get_hidden_field();
        $nonce        = wp_create_nonce( __FILE__ );
        $button_text  = __( \'Report broken video\', \'plugin_rbv\' );

        $form = <<<RBVFORM
<form method=\'post\' action=\'$url\' class=\'{$this->prefix}_form\'>
    <input type=\'hidden\' name=\'{$this->prefix}[$this->nonce_name]\' value=\'$nonce\' />
    <input type=\'hidden\' name=\'{$this->prefix}[post_id]\' value=\'$post_id\' />
    <input type=\'submit\' name=\'{$this->prefix}[report]\' value=\'$button_text\' />
</form>
RBVFORM;

        return $form;
    }

    /**
     * Hidden text field as spam protection.
     *
     * @return string
     */
    protected function get_hidden_field()
    {
        // prevent doubled IDs if you use the_content() on archive pages.
        static $counter = 0;
        $field = $this->hidden_field . "_$counter";
        $counter++;

        $title = __( \'Leave this empty\', \'plugin_rbv\' );

        return "<style scoped>#$field{display:none}</style>
            <input name=\'{$this->prefix}[$field]\' title=\'$title\' />";
    }

    /**
     * Handle form submission.
     *
     * @uses apply_filters() \'rbv_recipient\' to set the mail recipient.
     *      \'rbv_from\' to set the \'From\' header.
     * @return string
     */
    protected function handle_submit()
    {
        if ( ! isset ( $_POST[ $this->prefix ] )
            or \'\' == trim( implode( \'\', $_POST[ $this->prefix ] ) )
            or ! wp_verify_nonce( $_POST[ $this->prefix ][ $this->nonce_name ], __FILE__ )
            or ! empty ( $_POST[ $this->prefix ][ $this->hidden_field ] )
            or   empty ( $_POST[ $this->prefix ][ \'post_id\' ] )
        )
        {
            return $this->get_form();
        }

        $blog_name = get_bloginfo( \'name\' );
        $url       = get_permalink( (int) $_POST[ $this->prefix ][ \'post_id\' ] );

        // Pro tempore. You may add an option for this in \'wp-admin\'.
        $recipient = get_option( \'admin_email\' );
        $recipient = apply_filters( $this->prefix . \'_recipient\', $recipient );

        $subject   = sprintf(
            __( \'Broken video on %s\', \'plugin_rbv\' ),
            $blog_name
        );
        $message  = sprintf(
            __( "There is a broken video on:\\n <%s>", \'plugin_rbv\' ),
            $url
        );
        $from     = "From: [RBV] $blog_name <$recipient>";
        $from     = apply_filters( $this->prefix . \'_from\', $from );
        $send     = wp_mail( $recipient, $subject, $message, $from );

        $error    = __(
            \'Sorry, we could not send the report. May we ask you to use the contact page instead?\',
            \'plugin_rbv\'
        );
        $success  = __( "Thank you! We will take a look.", \'plugin_rbv\' );
        $feedback = $send ? $success : $error;

        return "<p class=\'{$this->prefix}_result\'>$feedback</p>";
    }
}

Git克隆URI：git://github.com/toscho/Report-Broken-Video.git