WordPress Widget

<?php
/*-----------------------------------------------------------------------------------*/
/*  Author Widget Class
/*-----------------------------------------------------------------------------------*/

class WPS_Author_Widget extends WP_Widget {

    function WPS_Author_Widget() {
        $widget_ops = array( 'classname' => 'wps_author_widget', 'description' => __('Use this widget to display author/user profile info', 'twid') );
        $control_ops = array( 'id_base' => 'wps_author_widget' );
        $this->WP_Widget( 'wps_author_widget', __('FRONT User Profile', 'twid'), $widget_ops, $control_ops );

        if(!is_admin()){
          add_action( 'wp_enqueue_scripts', array($this,'enqueue_styles'));
        }
    }


    function enqueue_styles(){
        wp_register_style( 'twid-author-widget', WPS_AUTHOR_WIDGET_URL.'css/style.css', false, '1.0.0' );
    wp_enqueue_style( 'twid-author-widget' );
 }


    function widget( $args, $instance ) {
        extract( $args );

        //Check for user_id
            $user_id = $instance['author'];
            if($instance['auto_detect']){
                if(is_author()){
                    $obj = get_queried_object();
                    $user_id = $obj->data->ID;
                } elseif(is_single()){
                    $obj = get_queried_object();
                    $user_id = $obj->post_author;
                }
            }

        $author_link = $instance['display_all_posts'] ? get_author_posts_url(get_the_author_meta('ID',$user_id)) : false;
        $image_align = $instance ['image_alignment'];
        $title =  $instance['name_to_title'] ? get_the_author_meta('display_name', $user_id) : apply_filters('widget_title', $instance['title'] );

        echo $before_widget;

        if ( !empty($title) ) {
            echo $before_title . $title . $after_title;
        }
        ?>



        <?php if($instance['display_avatar']) : ?>
            <?php
                if($author_link && $instance['link_to_avatar']){
                    $pre_avatar = '<a href="'.$author_link.'">';
                    $post_avatar = '</a>';
                } else {
                    $pre_avatar = '';
                    $post_avatar = '';
                }
                echo get_avatar( get_the_author_meta('ID', $user_id), $instance['avatar_size'],$instance['image_alignment'] ) . $post_avatar;
            ?>
        <?php endif; ?>

        <?php if($instance['display_name'] && !($instance['name_to_title'])) : ?>
          <?php
            if($author_link && $instance['link_to_name']){
                    $pre_name = '<a href="'.$author_link.'">';
                    $post_name = '</a>';
                } else {
                    $pre_name = '';
                    $post_name = '';
                }
                echo '<h3>' . $pre_name . get_the_author_meta('display_name', $user_id) . $post_name. '</h3>';
            ?>
        <?php endif; ?>

        <?php if($instance['display_desc']) : ?>
            <?php echo wpautop(get_the_author_meta('description',$user_id)); ?>
        <?php endif; ?>

        <?php if($author_link && $instance['link_text']) : ?>
            <a href="<?php echo $author_link; ?>" class="wps_author_link"><?php echo $instance['link_text']; ?></a>
        <?php endif; ?>

        <?php
        echo $after_widget;
    }


    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags( $new_instance['title'] );
        $instance['author'] = absint( $new_instance['author'] );
                $instance['image_alignment'] = isset($new_instance['image_alignment'] );
        $instance['auto_detect'] = isset($new_instance['auto_detect']) ? 1 : 0;
        $instance['display_name'] = isset($new_instance['display_name']) ? 1 : 0;
        $instance['display_avatar'] = isset($new_instance['display_avatar']) ? 1 : 0;
        $instance['display_desc'] = isset($new_instance['display_desc']) ? 1 : 0;
        $instance['display_all_posts'] = isset($new_instance['display_all_posts']) ? 1 : 0;
        $instance['name_to_title'] = isset($new_instance['name_to_title']) ? 1 : 0;
        $instance['link_to_name'] = isset($new_instance['link_to_name']) ? 1 : 0;
        $instance['link_to_avatar'] = isset($new_instance['link_to_avatar']) ? 1 : 0;
        $instance['link_text'] = strip_tags( $new_instance['link_text'] );
        $instance['avatar_size'] = !empty($new_instance['avatar_size']) ? absint($new_instance['avatar_size']) : 64;

        return $instance;
    }

    function form( $instance ) {

        $defaults = array(
                'title' => __('About Author', 'twid'),
                'author' => 0,
                'auto_detect' => 0,
                'display_name' => 1,
                'display_avatar' => 1,
                                'image_alignment' => '',
                'display_desc' => 1,
                'display_all_posts' => 1,
                'avatar_size' => 64,
                'name_to_title' => 0,
                'link_to_name' => 0,
                'link_to_avatar' => 0,
                'link_text' => __('View all posts', 'twid'),
            );

        $instance = wp_parse_args( (array) $instance, $defaults ); ?>

        <p>
            <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title', 'twid'); ?>:</label>
            <input id="<?php echo $this->get_field_id( 'title' ); ?>" type="text" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" class="widefat" />
        </p>

        <p>
            <?php $authors = get_users(); ?>
            <label for="<?php echo $this->get_field_id( 'author' ); ?>"><?php _e('Choose author/user', 'twid'); ?>:</label>
            <select name="<?php echo $this->get_field_name( 'author' ); ?>" id="<?php echo $this->get_field_id( 'author' ); ?>" class="widefat">
            <?php foreach($authors as $author) : ?>
                <option value="<?php echo $author->ID; ?>" <?php selected($author->ID, $instance['author']); ?>><?php echo $author->data->user_login; ?></option>
            <?php endforeach; ?>
            </select>
        </p>

        <p>
        <input id="<?php echo $this->get_field_id( 'auto_detect' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'auto_detect' ); ?>" value="1" <?php checked(1, $instance['auto_detect']); ?>/>
        <label for="<?php echo $this->get_field_id( 'auto_detect' ); ?>"><?php _e('Automatically detect author', 'twid'); ?></label>
        <small class="howto"><?php _e('Use this option to automatically detect author if this sidebar is used on single post template or author template', 'twid'); ?></small>
      </p>
      <h4><?php _e('Display Options', 'twid'); ?></h4>
      <ul>
        <li>
            <input id="<?php echo $this->get_field_id( 'display_avatar' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'display_avatar' ); ?>" value="1" <?php checked(1, $instance['display_avatar']); ?>/>
            <label for="<?php echo $this->get_field_id( 'display_avatar' ); ?>"><?php _e('Display author avatar', 'twid'); ?></label>
        </li>


<li>
    <label for="<?php echo $this->get_field_id( 'image_alignment' ); ?>"><?php _e( 'Image Alignment', 'twid' ); ?>:</label>
            <select id="<?php echo $this->get_field_id( 'image_alignment' ); ?>" name="<?php echo $this->get_field_name( 'image_alignment' ); ?>">
                <option value="alignnone">- <?php _e( 'None', 'twid' ); ?> -</option>
                <option value="alignleft" <?php selected( 'alignleft', $instance['image_alignment'] ); ?>><?php _e( 'Left', 'twid' ); ?></option>
                <option value="alignright" <?php selected( 'alignright', $instance['image_alignment'] ); ?>><?php _e( 'Right', 'twid' ); ?></option>
            </select>


</li>
        <li>
            <label for="<?php echo $this->get_field_id( 'avatar_size' ); ?>"><?php _e('Avatar size:', 'twid'); ?></label>
            <input id="<?php echo $this->get_field_id( 'avatar_size' ); ?>" type="text" name="<?php echo $this->get_field_name( 'avatar_size' ); ?>" value="<?php echo $instance['avatar_size']; ?>" class="small-text"/> px
        </li>
      </ul>
      <hr/>
      <ul>
        <li>
            <input id="<?php echo $this->get_field_id( 'display_name' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'display_name' ); ?>" value="1" <?php checked(1, $instance['display_name']); ?>/>
            <label for="<?php echo $this->get_field_id( 'display_name' ); ?>"><?php _e('Display author name', 'twid'); ?></label>
        </li>
        <li>
            <input id="<?php echo $this->get_field_id( 'name_to_title' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'name_to_title' ); ?>" value="1" <?php checked(1, $instance['name_to_title']); ?>/>
            <label for="<?php echo $this->get_field_id( 'name_to_title' ); ?>"><?php _e('Overwrite widget title with author name', 'twid'); ?></label>
        </li>
      </ul>
      <hr/>
      <ul>
        <li>
            <input id="<?php echo $this->get_field_id( 'display_desc' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'display_desc' ); ?>" value="1" <?php checked(1, $instance['display_desc']); ?>/>
            <label for="<?php echo $this->get_field_id( 'display_desc' ); ?>"><?php _e('Display author description', 'twid'); ?></label>
        </li>
      </ul>
      <hr/>
      <ul>
        <li>
            <input id="<?php echo $this->get_field_id( 'display_all_posts' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'display_all_posts' ); ?>" value="1" <?php checked(1, $instance['display_all_posts']); ?>/>
            <label for="<?php echo $this->get_field_id( 'display_all_posts' ); ?>"><?php _e('Display author "all posts" archive link', 'twid'); ?></label>
        </li>
        <li>
            <input id="<?php echo $this->get_field_id( 'link_to_name' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'link_to_name' ); ?>" value="1" <?php checked(1, $instance['link_to_name']); ?>/>
            <label for="<?php echo $this->get_field_id( 'link_to_name' ); ?>"><?php _e('Link author name', 'twid'); ?></label>
        </li>
        <li>
            <input id="<?php echo $this->get_field_id( 'link_to_avatar' ); ?>" type="checkbox" name="<?php echo $this->get_field_name( 'link_to_avatar' ); ?>" value="1" <?php checked(1, $instance['link_to_avatar']); ?>/>
            <label for="<?php echo $this->get_field_id( 'link_to_avatar' ); ?>"><?php _e('Link author avatar', 'twid'); ?></label>
        </li>
        <li>
            <label for="<?php echo $this->get_field_id( 'link_text' ); ?>"><?php _e('Link text:', 'twid'); ?></label>
            <input id="<?php echo $this->get_field_id( 'link_text' ); ?>" type="text" name="<?php echo $this->get_field_name( 'link_text' ); ?>" value="<?php echo $instance['link_text']; ?>" class="widefat"/>
            <small class="howto"><?php _e('Specify text for "all posts" link if you want to show separate link', 'twid'); ?></small>
        </li>
      </ul>


    <?php
    }
}

?>