<?php
/*-----------------------------------------------------------------------------------

	Plugin Name: MyThemeShop Related Posts
	Version: 2.0.1
	
-----------------------------------------------------------------------------------*/

class mts_related_posts_widget extends WP_Widget {

	public function __construct() {
		parent::__construct(
			'mts_related_posts_widget',
			sprintf( __('%sRelated Posts', 'schema' ), MTS_THEME_WHITE_LABEL ? '' : 'MTS ' ),
			array( 'description' => __( 'Display the related posts from current post\'s categories. Will appear on single posts only.', 'schema' ) )
		);
	}

	public function form( $instance ) {
		$defaults = array(
			'title_lenght' => 7,
			'comment_num' => 1,
			'date' => 1,
			'show_thumb6' => 1,
			'box_layout' => 'horizontal-small',
			'show_excerpt' => 0,
			'excerpt_length' => 10
		);
		$instance = wp_parse_args((array) $instance, $defaults);
		$title = isset( $instance[ 'title' ] ) ? $instance[ 'title' ] : __( 'Related Posts', 'schema' );
		$title_length = isset( $instance[ 'title_length' ] ) ? intval( $instance[ 'title_length' ] ) : 7;
		$qty = isset( $instance[ 'qty' ] ) ? esc_attr( $instance[ 'qty' ] ) : 5;
		$comment_num = isset( $instance[ 'comment_num' ] ) ? esc_attr( $instance[ 'comment_num' ] ) : 1;
		$date = isset( $instance[ 'date' ] ) ? esc_attr( $instance[ 'date' ] ) : 1;
		$show_thumb6 = isset( $instance[ 'show_thumb6' ] ) ? esc_attr( $instance[ 'show_thumb6' ] ) : 1;
		$box_layout = $instance['box_layout'];
		$show_excerpt = isset( $instance[ 'show_excerpt' ] ) ? esc_attr( $instance[ 'show_excerpt' ] ) : 1;
		$excerpt_length = isset( $instance[ 'excerpt_length' ] ) ? intval( $instance[ 'excerpt_length' ] ) : 10;
		?>
		<p>
			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:', 'schema' ); ?></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>
		
		<p>
			<label for="<?php echo $this->get_field_id( 'qty' ); ?>"><?php _e( 'Number of Posts to show', 'schema' ); ?></label>
			<input id="<?php echo $this->get_field_id( 'qty' ); ?>" name="<?php echo $this->get_field_name( 'qty' ); ?>" type="number" min="1" step="1" value="<?php echo esc_attr( $qty ); ?>" />
		</p>

		<p>
	       <label for="<?php echo $this->get_field_id( 'title_length' ); ?>"><?php _e( 'Title Length:', 'schema' ); ?>
	       <input id="<?php echo $this->get_field_id( 'title_length' ); ?>" name="<?php echo $this->get_field_name( 'title_length' ); ?>" type="number" min="1" step="1" value="<?php echo esc_attr( $title_length ); ?>" />
	       </label>
		</p>

		<p>
			<label for="<?php echo $this->get_field_id("show_thumb6"); ?>">
				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("show_thumb6"); ?>" name="<?php echo $this->get_field_name("show_thumb6"); ?>" value="1" <?php if (isset($instance['show_thumb6'])) { checked( 1, $instance['show_thumb6'], true ); } ?> />
				<?php _e( 'Show Thumbnails', 'schema' ); ?>
			</label>
		</p>

		<p>
			<label for="<?php echo $this->get_field_id('box_layout'); ?>"><?php _e('Posts layout:', 'schema' ); ?></label>
			<select id="<?php echo $this->get_field_id('box_layout'); ?>" name="<?php echo $this->get_field_name('box_layout'); ?>">
				<option value="horizontal-small" <?php selected($box_layout, 'horizontal-small', true); ?>><?php _e('Horizontal', 'schema' ); ?></option>
				<option value="vertical-small" <?php selected($box_layout, 'vertical-small', true); ?>><?php _e('Vertical', 'schema' ); ?></option>
			</select>
		</p>
		
		<p>
			<label for="<?php echo $this->get_field_id("date"); ?>">
				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("date"); ?>" name="<?php echo $this->get_field_name("date"); ?>" value="1" <?php checked( 1, $instance['date'], true ); ?> />
				<?php _e( 'Show post date', 'schema' ); ?>
			</label>
		</p>

		<p>
			<label for="<?php echo $this->get_field_id("comment_num"); ?>">
				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("comment_num"); ?>" name="<?php echo $this->get_field_name("comment_num"); ?>" value="1" <?php checked( 1, $instance['comment_num'], true ); ?> />
				<?php _e( 'Show number of comments', 'schema' ); ?></p>
			</label>
		</p>
		
		<p>
			<label for="<?php echo $this->get_field_id("show_excerpt"); ?>">
				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("show_excerpt"); ?>" name="<?php echo $this->get_field_name("show_excerpt"); ?>" value="1" <?php checked( 1, $instance['show_excerpt'], true ); ?> />
				<?php _e( 'Show excerpt', 'schema' ); ?>
			</label>
		</p>
		
		<p>
			<label for="<?php echo $this->get_field_id( 'excerpt_length' ); ?>"><?php _e( 'Excerpt Length:', 'schema' ); ?>
				<input id="<?php echo $this->get_field_id( 'excerpt_length' ); ?>" name="<?php echo $this->get_field_name( 'excerpt_length' ); ?>" type="number" min="1" step="1" value="<?php echo esc_attr( $excerpt_length ); ?>" />
			</label>
		</p>

		<?php 
	}

	public function update( $new_instance, $old_instance ) {
		$instance = array();
		$instance['title'] = strip_tags( $new_instance['title'] );
		$instance['qty'] = intval( $new_instance['qty'] );
		$instance['title_length'] = intval( $new_instance['title_length'] );
		$instance['comment_num'] = intval( $new_instance['comment_num'] );
		$instance['date'] = intval( $new_instance['date'] );
		$instance['show_thumb6'] = intval( $new_instance['show_thumb6'] );
		$instance['box_layout'] = $new_instance['box_layout'];
		$instance['show_excerpt'] = isset( $new_instance['show_excerpt'] ) ? intval( $new_instance['show_excerpt'] ) : 0;
		$instance['excerpt_length'] = intval( $new_instance['excerpt_length'] );
		return $instance;
	}

	public function widget( $args, $instance ) {
		extract( $args );
		$title = apply_filters( 'widget_title', $instance['title'] );
		$title_length = $instance['title_length'];
		$comment_num = $instance['comment_num'];
		$date = $instance['date'];
		$qty = (int) $instance['qty'];
		$show_thumb6 = (int) $instance['show_thumb6'];
		$box_layout = isset($instance['box_layout']) ? $instance['box_layout'] : 'horizontal-small';
		$show_excerpt = $instance['show_excerpt'];
		$excerpt_length = $instance['excerpt_length'];
		
		if(is_singular()){
			$before_widget = preg_replace('/class="([^"]+)"/i', 'class="$1 '.(isset($instance['box_layout']) ? $instance['box_layout'] : 'horizontal-small').'"', $before_widget); // Add horizontal/vertical class to widget
			echo $before_widget;
			if ( ! empty( $title ) ) echo $before_title . $title . $after_title;
			echo self::get_cat_posts( $qty, $title_length, $comment_num, $date, $show_thumb6, $box_layout, $show_excerpt, $excerpt_length );
			echo $after_widget;
		}
	}

	public function get_cat_posts( $qty, $title_length, $comment_num, $date, $show_thumb6, $box_layout, $show_excerpt, $excerpt_length ) {

	$no_image = ( $show_thumb6 ) ? '' : ' no-thumb';

	if ( 'horizontal-small' === $box_layout ) {
		$thumbnail     = 'widgetthumb';
		$open_li_item  = '<li class="post-box horizontal-small horizontal-container'.$no_image.'"><div class="horizontal-container-inner">';
		$close_li_item = '</div></li>';
	} else {
		$thumbnail     = 'widgetfull';
		$open_li_item  = '<li class="post-box vertical-small'.$no_image.'">';
		$close_li_item = '</li>';
	}

	$thePostID = get_the_ID();
	$cats = get_the_category($thePostID);
	$cat_ids = array();
	foreach($cats as $individual_cat)
		$cat_ids[] = $individual_cat->cat_ID;
		$posts = new WP_Query( 
			array(
				'category__in' => $cat_ids,
				'post__not_in' => array($thePostID),
				'posts_per_page' => $qty, 
				'orderby' => 'rand'
				));

		echo '<ul class="related-posts-widget">';
		while ( $posts->have_posts() ) { $posts->the_post(); ?>
			<?php echo $open_li_item; ?>
				<?php if ( $show_thumb6 == 1 ) : ?>
				<div class="post-img">
					<a href="<?php echo esc_url( get_the_permalink() ); ?>" title="<?php echo esc_attr( get_the_title() ); ?>">
						<?php if ( has_post_thumbnail() ) { ?>
							<?php the_post_thumbnail( 'schema-' . $thumbnail, array( 'title' => '' ) ); ?>
						<?php } else { ?>
							<img class="wp-post-image" src="<?php echo get_template_directory_uri() . '/images/nothumb-schema-' . $thumbnail . '.png'; ?>" alt="<?php echo esc_attr( get_the_title() ); ?>"/>
						<?php } ?>
					</a>
				</div>
				<?php endif; ?>
				<div class="post-data">
					<div class="post-data-container">
						<div class="post-title">
							<a href="<?php echo esc_url( get_the_permalink() ); ?>" title="<?php echo esc_attr( get_the_title() ); ?>"><?php echo esc_html( mts_truncate( get_the_title(), $title_length, 'words' ) ); ?></a>
						</div>
						<?php if ( $date == 1 || $comment_num == 1 ) : ?>
						<div class="post-info">
							<?php if ( $date == 1 ) : ?>
								<span class="thetime updated"><?php the_time( get_option( 'date_format' ) ); ?></span>
							<?php endif; ?>
							<?php if ( $comment_num == 1 ) : ?>
								<span class="thecomment"><?php echo comments_number('<span class="comm">No Comments</span>','1 <span class="comm">Comment</span>','% <span class="comm">Comments</span>');?></span>
							<?php endif; ?>
						</div> <!--end .post-info-->
						<?php endif; ?>
						<?php if ( $show_excerpt == 1 ) : ?>
						<div class="post-excerpt">
							<?php echo mts_excerpt($excerpt_length); ?>
						</div>
						<?php endif; ?>
					</div>
				</div>
			<?php echo $close_li_item; ?>
		<?php }
		wp_reset_postdata();
		echo '</ul>'."\r\n";
	}
}

// Register widget
add_action( 'widgets_init', 'register_mts_related_posts_widget' );
function register_mts_related_posts_widget() {
	register_widget( 'mts_related_posts_widget' );
}