<?php
/**
 * Custom template tags for this theme
 *
 * @package WordPress
 * @subpackage Twenty_Nineteen
 * @since 1.0.0
 */

if ( ! function_exists( 'twentynineteen_posted_on' ) ) :
	/**
	 * Prints HTML with meta information for the current post-date/time.
	 */
	function twentynineteen_posted_on() {
		$time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';
		if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
			$time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
		}

		$time_string = sprintf(
			$time_string,
			esc_attr( get_the_date( DATE_W3C ) ),
			esc_html( get_the_date() ),
			esc_attr( get_the_modified_date( DATE_W3C ) ),
			esc_html( get_the_modified_date() )
		);

		printf(
			'<span class="posted-on">%1$s<a href="%2$s" rel="bookmark">%3$s</a></span>',
			twentynineteen_get_icon_svg( 'watch', 16 ),
			esc_url( get_permalink() ),
			$time_string
		);
	}
endif;

if ( ! function_exists( 'twentynineteen_posted_by' ) ) :
	/**
	 * Prints HTML with meta information about theme author.
	 */
	function twentynineteen_posted_by() {
		printf(
			'<span class="byline">%1$s<span class="screen-reader-text">%2$s</span><span class="author vcard"><a class="url fn n" href="%3$s">%4$s</a></span></span>',
			/* translators: 1: SVG icon. 2: post author, only visible to screen readers. 3: author link. */
			twentynineteen_get_icon_svg( 'person', 16 ),
			esc_html__( 'Posted by', 'twentynineteen' ),
			esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
			esc_html( get_the_author() )
		);
	}
endif;

if ( ! function_exists( 'twentynineteen_comment_count' ) ) :
	/**
	 * Prints HTML with the comment count for the current post.
	 */
	function twentynineteen_comment_count() {
		if ( ! post_password_required() && ( comments_open() || get_comments_number() ) ) {
			echo '<span class="comments-link">';
			echo twentynineteen_get_icon_svg( 'comment', 16 );

			/* translators: %s: Name of current post. Only visible to screen readers. */
			comments_popup_link( sprintf( __( 'Leave a comment<span class="screen-reader-text"> on %s</span>', 'twentynineteen' ), get_the_title() ) );

			echo '</span>';
		}
	}
endif;

if ( ! function_exists( 'twentynineteen_entry_footer' ) ) :
	/**
	 * Prints HTML with meta information for the categories, tags and comments.
	 */
	function twentynineteen_entry_footer() {

		// Posted by
		twentynineteen_posted_by();

		// Posted on
		twentynineteen_posted_on();

		// Hide category and tag text for pages.
		if ( 'post' === get_post_type() ) {
			/* translators: used between list items, there is a space after the comma. */
			$categories_list = get_the_category_list( esc_html__( ', ', 'twentynineteen' ) );
			if ( $categories_list ) {
				/* translators: 1: SVG icon. 2: posted in label, only visible to screen readers. 3: list of categories. */
				printf(
					'<span class="cat-links">%1$s<span class="screen-reader-text">%2$s</span>%3$s</span>',
					twentynineteen_get_icon_svg( 'archive', 16 ),
					esc_html__( 'Posted in', 'twentynineteen' ),
					$categories_list
				); // WPCS: XSS OK.
			}

			/* translators: used between list items, there is a space after the comma. */
			$tags_list = get_the_tag_list( '', esc_html__( ', ', 'twentynineteen' ) );
			if ( $tags_list ) {
				/* translators: 1: SVG icon. 2: posted in label, only visible to screen readers. 3: list of tags. */
				printf(
					'<span class="cat-links">%1$s<span class="screen-reader-text">%2$s </span>%3$s</span>',
					twentynineteen_get_icon_svg( 'tag', 16 ),
					esc_html__( 'Tags:', 'twentynineteen' ),
					$tags_list
				); // WPCS: XSS OK.
			}
		}

		// Comment count.
		if ( ! is_singular() ) {
			twentynineteen_comment_count();
		}

		// Edit post link.
		edit_post_link(
			sprintf(
				wp_kses(
					/* translators: %s: Name of current post. Only visible to screen readers. */
					__( 'Edit <span class="screen-reader-text">%s</span>', 'twentynineteen' ),
					array(
						'span' => array(
							'class' => array(),
						),
					)
				),
				get_the_title()
			),
			'<span class="edit-link">' . twentynineteen_get_icon_svg( 'edit', 16 ),
			'</span>'
		);
	}
endif;

if ( ! function_exists( 'twentynineteen_post_thumbnail' ) ) :
	/**
	 * Displays an optional post thumbnail.
	 *
	 * Wraps the post thumbnail in an anchor element on index views, or a div
	 * element when on single views.
	 */
	function twentynineteen_post_thumbnail() {
		if ( ! twentynineteen_can_show_post_thumbnail() ) {
			return;
		}

		if ( is_singular() ) :
			?>

			<figure class="post-thumbnail">
				<?php the_post_thumbnail(); ?>
			</figure><!-- .post-thumbnail -->

			<?php
		else :
			?>

			<figure class="post-thumbnail">
				<a class="post-thumbnail-inner" href="<?php the_permalink(); ?>" aria-hidden="true" tabindex="-1">
					<?php
					the_post_thumbnail(
						'post-thumbnail',
						array(
							'alt' => the_title_attribute(
								array( 'echo' => false )
							),
						)
					);
					?>
				</a>
			</figure><!-- .post-thumbnail -->

			<?php
		endif; // End is_singular().
	}
endif;

if ( ! function_exists( 'twentynineteen_header_featured_image_css' ) ) :
	/**
	 * Returns the CSS for the header featured image background.
	 */
	function twentynineteen_header_featured_image_css() {
		$img_url = get_the_post_thumbnail_url( get_the_ID(), 'post-thumbnail' );
		return sprintf( 'body.singular .site-header.featured-image .site-branding-container:before { background-image: url(%s); }', esc_url( $img_url ) );
	}
endif;

if ( ! function_exists( 'twentynineteen_comment_avatar' ) ) :
	/**
	 * Returns the HTML markup to generate a user avatar.
	 */
	function twentynineteen_get_user_avatar_markup( $id_or_email = null ) {

		if ( ! isset( $id_or_email ) ) {
			$id_or_email = get_current_user_id();
		}

		return sprintf( '<div class="comment-user-avatar comment-author vcard">%s</div>', get_avatar( $id_or_email, twentynineteen_get_avatar_size() ) );
	}
endif;

if ( ! function_exists( 'twentynineteen_discussion_avatars_list' ) ) :
	/**
	 * Displays a list of avatars involved in a discussion for a given post.
	 */
	function twentynineteen_discussion_avatars_list( $comment_authors ) {
		if ( ! empty( $comment_authors ) ) {
			$out = array( '<ol class="discussion-avatar-list">' );
			foreach ( $comment_authors as $id_or_email ) {
				$out[] = sprintf( '<li>%s</li>', twentynineteen_get_user_avatar_markup( $id_or_email ) );
			}
			$out[] = '</ol><!-- .discussion-avatar-list -->';
			echo implode( "\n", $out );
		}
		return null;
	}
endif;

if ( ! function_exists( 'twentynineteen_comment_form' ) ) :
	/**
	 * Documentation for function.
	 */
	function twentynineteen_comment_form( $order ) {
		if ( true === $order || strtolower( $order ) === strtolower( get_option( 'comment_order', 'asc' ) ) ) {

			comment_form(
				array(
					'logged_in_as'       => null,
					'title_reply'        => null,
				)
			);
		}
	}
endif;

if ( ! function_exists( 'twentynineteen_the_posts_navigation' ) ) :
	/**
	 * Documentation for function.
	 */
	function twentynineteen_the_posts_navigation() {
		$prev_icon = twentynineteen_get_icon_svg( 'chevron_left', 22 );
		$next_icon = twentynineteen_get_icon_svg( 'chevron_right', 22 );
		the_posts_pagination(
			array(
				'mid_size'  => 2,
				'prev_text' => sprintf( '%s <span class="nav-prev-text">%s</span>', $prev_icon, __( 'Newer posts', 'twentynineteen' ) ),
				'next_text' => sprintf( '<span class="nav-next-text">%s</span> %s', __( 'Older posts', 'twentynineteen' ), $next_icon ),
			)
		);
	}
endif;
