WordPress plugin - Adsense by Author

adsense-by-author.php

<?php
/**
 * Plugin Name: Adsense by Author
 * Plugin URI: http://claudiosmweb.com/
 * Description: Adsense by Author.
 * Author: claudiosanches
 * Author URI: http://claudiosmweb.com/
 * Version: 1.0
 * License: GPLv2 or later
 * Text Domain: adbyauthor
 * Domain Path: /languages/
 */

class Adsense_By_Author {

    public function __construct() {

        // Actions.
        add_action( 'show_user_profile', array( &$this, 'add_profile_fields' ) );
        add_action( 'edit_user_profile', array( &$this, 'add_profile_fields' ) );
        add_action( 'personal_options_update', array( &$this, 'save_profile_fields' ) );
        add_action( 'edit_user_profile_update', array( &$this, 'save_profile_fields' ) );

        // Filters.
        add_filter( 'the_content', array( &$this, 'insert_blocks' ) );
    }

    /**
     * Add profile fields.
     */
    public function add_profile_fields( $user ) {
        ?>
        <h3><?php _e( 'Banners de publicidade', 'adbyauthor' ); ?></h3>
        <table class="form-table">
            <tr>
                <th><label for="banner_top"><?php _e( 'Banner topo', 'adbyauthor' ); ?></label></th>
                <td>
                    <textarea cols="30" rows="5" id="banner_top" name="banner_top"><?php echo esc_attr( get_the_author_meta( 'banner_top', $user->ID ) ); ?></textarea>
                    <br /><span class="description"><?php _e( 'Banner da in&iacute;cio do post.', 'adbyauthor' ); ?></span>
                </td>
            </tr>
            <tr>
                <th><label for="banner_bottom"><?php _e( 'Banner rodap&eacute;', 'adbyauthor' ); ?></label></th>
                <td>
                    <textarea cols="30" rows="5" id="banner_bottom" name="banner_bottom"><?php echo esc_attr( get_the_author_meta( 'banner_bottom', $user->ID ) ); ?></textarea>
                    <br /><span class="description"><?php _e( 'Banner do rodap&eacute; do post.', 'adbyauthor' ); ?></span>
                </td>
            </tr>
            <tr>
                <th><label for="banner_sidebar"><?php _e( 'Banner sidebar', 'adbyauthor' ); ?></label></th>
                <td>
                    <textarea cols="30" rows="5" id="banner_sidebar" name="banner_sidebar"><?php echo esc_attr( get_the_author_meta( 'banner_sidebar', $user->ID ) ); ?></textarea>
                    <br /><span class="description"><?php _e( 'Banner da sidebar.', 'adbyauthor' ); ?></span>
                </td>
            </tr>
        </table>
        <?php
    }

    /**
     * Save profile fields.
     */
    public function save_profile_fields( $user_id ) {
        if ( ! current_user_can( 'edit_user', $user_id ) ) {
            return false;
        }

        update_usermeta( $user_id, 'banner_top', $_POST['banner_top'] );
        update_usermeta( $user_id, 'banner_bottom', $_POST['banner_bottom'] );
        update_usermeta( $user_id, 'banner_sidebar', $_POST['banner_sidebar'] );
    }

    /**
     * Insert banners in the_content.
     */
    public function insert_blocks( $content ) {

        if ( is_single() ) {
            $top = '<div class="banner-author" id="banner-top" style="clear: both; margin-bottom: 20px;">' . get_the_author_meta( 'banner_top' ) . '<div style="clear: both"></div></div>';
            $bottom = '<div class="banner-author" id="banner-bottom" style="clear: both; margin-bottom: 20px;">' . get_the_author_meta( 'banner_bottom' ) . '<div style="clear: both"></div></div>';

            $content = $top . $content . $bottom;
        }

        return $content;
    }

} // close Adsense_By_Author class.

$adsense_by_author = new Adsense_By_Author;

/**
 * Register Widget.
 */
class Adsense_By_Author_Widget extends WP_Widget {

    function Adsense_By_Author_Widget() {
        $widget_ops = array( 'adsense_by_author_widget' => 'Adsense_By_Author_Widget', 'description' => 'Exibe um banner do autor.' );
        $this->WP_Widget( 'Adsense_By_Author_Widget', 'Banner do autor', $widget_ops );
    }

    function form( $instance ) {
        $instance = wp_parse_args( (array) $instance, array( 'title' => '', 'banner' => '' ) );
        $title = $instance['title'];
        $banner = $instance['banner'];
        ?>
        <p>
            <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:', 'adbyauthor' ); ?>
                <input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
            </label>
        </p>
        <p>
            <label for="<?php echo $this->get_field_id( 'banner' ); ?>"><?php _e( 'Banner padrão:', 'adbyauthor' ); ?>
                <textarea name="<?php echo $this->get_field_name( 'banner' ); ?>" id="widget-text-2-text" id="<?php echo $this->get_field_id( 'banner' ); ?>" cols="20" rows="16" class="widefat"><?php echo esc_attr( $banner ); ?></textarea>
            </label>
            <br /><span class="description"><?php _e( 'Adicione um banner padr&atilde;o que ser&aacute; usado nas categorias e outras p&aacute;ginas do site.', 'adbyauthor' ); ?></span>
        </p>
        <?php
    }

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags( $new_instance['title'] );
        $instance['banner'] = $new_instance['banner'];

        return $instance;
    }

    function widget( $args, $instance ) {
        extract( $args, EXTR_SKIP );
        echo $before_widget;

        // Display widget.
        if ( is_single() ) {
            $banner_sidebar = get_the_author_meta( 'banner_sidebar' );

            if ( $banner_sidebar ){
                echo '<div class="banner-author banner-sidebar">' . $banner_sidebar . '</div>';
            } else {
                $title = empty( $instance['title'] ) ? '' : apply_filters( 'widget_title', $instance['title'] );
                if ( ! empty( $title ) ) {
                    echo $before_title . $title . $after_title;
                }

                $banner = empty( $instance['banner'] ) ? '' : apply_filters( 'widget_banner', $instance['banner'] );
                if ( ! empty( $banner ) ) {
                    echo '<div class="author-banner">' . $banner . '</div>';
                }
            }
        } else {
            $title = empty( $instance['title'] ) ? '' : apply_filters( 'widget_title', $instance['title'] );
            if ( ! empty( $title ) ) {
                echo $before_title . $title . $after_title;
            }

            $banner = empty( $instance['banner'] ) ? '' : apply_filters( 'widget_banner', $instance['banner'] );
            if ( ! empty( $banner ) ) {
                echo '<div class="author-banner">' . $banner . '</div>';
            }
        }

        echo $after_widget;
    }
}

add_action( 'widgets_init', create_function( '', 'return register_widget( "Adsense_By_Author_Widget" );' ) );