widget-for-co-authors-dev/widget-for-co-authors.php

<?php
/*
Plugin Name: Co-Authors Widget Dev
Description: The plugin add a widget and a shortcode in order to show authors of an article. It is compatible with Co-Authors Plus.
Version: 2021.1012
Author: Gianluigi Filippelli
Author URI: http://dropseaofulaula.blogspot.it/
Plugin URI: https://gitea.it/ulaulaman/widget-for-co-authors-dev
Gitea Plugin URI: https://gitea.it/ulaulaman/widget-for-co-authors-dev
License: GPLv2 or later
*/

// Load translations
add_action( 'plugins_loaded', 'caw_load_translations' );
function caw_load_translations() {
  load_plugin_textdomain( 'widget-for-co-authors', false, dirname( plugin_basename(__FILE__) ) . '/lang/' );
}

// Shortcode to show authors
add_shortcode( 'blog-post-coauthors', 'blog_post_coauthors' );
function blog_post_coauthors() {
  return coauthors_posts_links(", ", " & ", null, null, false);
}

// Widget to show authors' avatars
function blog_avatars() {
  $show_profile = __( 'Show profile', 'widget-for-co-authors' );
  $hide_profile = __( 'Hide profile', 'widget-for-co-authors' );

  if ( function_exists( 'get_coauthors' ) ) {
    $coauthors = get_coauthors();
    $user_posts = get_author_posts_url( $coauthor->ID, $coauthor->user_nicename );

    $i = 0;
    foreach ( $coauthors as $coauthor ) {
      $i++;
      
      ?>
        <div class="block-item-text">
          <input type="checkbox" hidden class="read-more-state" id="<?php echo $i; ?>" />
          <div class="read-more-wrap">
            <div class="avatar">
              <div class="avatarimg left" style="width:50%;"><?php echo coauthors_get_avatar( $coauthor, 65 ); ?>
                <a href="<?php echo get_author_posts_url( $coauthor->ID, $coauthor->user_nicename ); ?>"><?php echo $coauthor->display_name; ?></a>
              </div>
              <span class="read-more-target"><?php echo $coauthor->description; ?></span>
            </div>
          </div>
          <label for="<?php echo $i; ?>" class="read-more-trigger_closed">
            <strong>+ <?php printf( $show_profile ); ?></strong>
          </label>
          <label for="<?php echo $i; ?>" class="read-more-trigger_opened">
            <strong>- <?php printf( $hide_profile ); ?></strong>
          </label>
        </div>
      <?php
    }
  } else {
    $i = 0;
    ?>
      <div class="block-item-text">
        <input type="checkbox" hidden class="read-more-state" id="<?php echo $i; ?>" />
        <div class="read-more-wrap">
          <div class="avatar">
            <div class="avatarimg left"><?php echo get_avatar( get_the_author_meta( 'user_email' ), 65 ); ?>
              <a href="<?php echo get_the_author_meta( 'user_url' ); ?>"><?php echo get_the_author_meta( 'display_name' ); ?></a>
            </div>
            <span class="read-more-target"><?php echo get_the_author_meta( 'description' ); ?></span>
          </div>
        </div>
        <label for="<?php echo $i; ?>" class="read-more-trigger_closed">
          <strong>+ <?php printf( $show_profile ); ?></strong>
        </label>
        <label for="<?php echo $i; ?>" class="read-more-trigger_opened">
          <strong>- <?php printf( $hide_profile ); ?></strong>
        </label>
      </div>
    <?php
  }
}

function blog_enqueue() {
  wp_register_style( 'blog-spoiler-style', plugins_url('/blog-spoiler.css', __FILE__), rand(111,9999), '1' );
  wp_enqueue_style( 'blog-spoiler-style' );
}
add_action( 'wp_enqueue_scripts', 'blog_enqueue' );

// Shortcode authors' avatars
add_shortcode('blog-coauthors-avatars', 'blog_coauthors_avatars');
function blog_coauthors_avatars() {
  return blog_avatars();
}

// Widget register
function blog_load_widget() {
  register_widget( 'blog_widget' );
}
add_action( 'widgets_init', 'blog_load_widget' );
 
// Widget load
class blog_widget extends WP_Widget {
 
  function __construct() {
    parent::__construct(
  
    // Widget ID
    'blog_widget', 
  
      // Widget name in UI
  __('Authors', 'widget-for-co-authors'), 
  
    // Widget description
    array( 'description' => __( 'Show avatars and names of the authors', 'widget-for-co-authors' ), ) );
  }
 
  // Widget front-end 
  public function widget( $args, $instance ) {
    $title = apply_filters( 'widget_title', $instance['title'] );
  
    // before and after
    echo $args['before_widget'];
    if ( ! empty( $title ) )
    echo $args['before_title'] . $title . $args['after_title'];
  
    // output
    blog_avatars();
    echo $args['after_widget'];
  }
         
  // Widget backend 
  public function form( $instance ) {
    if ( isset( $instance[ 'title' ] ) ) {
      $title = $instance[ 'title' ];
    } else {
      $title = __( 'Written by', 'widget-for-co-authors' );
    }

    // Widget form
    ?>
      <p>
      <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label> 
      <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 ); ?>" />
      </p>
    <?php 
  }
     
  // Widget update
  public function update( $new_instance, $old_instance ) {
    $instance = array();
    $instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
    return $instance;
  }
}

?>