<?php

/**

 * Custom template tags for this theme.

 *

 * Eventually, some of the functionality here could be replaced by core features.

 *

 * @package Tesseract

 */



if ( ! function_exists( 'tesseract_paging_nav' ) ) :

/**

 * Display navigation to next/previous set of posts when applicable.

 */

function tesseract_paging_nav() {

	// Don't print empty markup if there's only one page.

	if ( $GLOBALS['wp_query']->max_num_pages < 2 ) {

		return;

	}

	?>

	<nav class="navigation paging-navigation cf" role="navigation">

		<h1 class="screen-reader-text"><?php _e( 'Posts navigation', 'tesseract' ); ?></h1>

		<div class="nav-links">



			<?php if ( get_next_posts_link() ) : ?>

			<div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts', 'tesseract' ) ); ?></div>

			<?php endif; ?>



			<?php if ( get_previous_posts_link() ) : ?>

			<div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>', 'tesseract' ) ); ?></div>

			<?php endif; ?>



		</div><!-- .nav-links -->

	</nav><!-- .navigation -->

	<?php

}

endif;



if ( ! function_exists( 'tesseract_post_nav' ) ) :

/**

 * Display navigation to next/previous post when applicable.

 */

function tesseract_post_nav() {

	// Don't print empty markup if there's nowhere to navigate.

	$previous = ( is_attachment() ) ? get_post( get_post()->post_parent ) : get_adjacent_post( false, '', true );

	$next     = get_adjacent_post( false, '', false );



	if ( ! $next && ! $previous ) {

		return;

	}

	?>

	<nav class="navigation post-navigation cf" role="navigation">

		<h1 class="screen-reader-text"><?php _e( 'Post navigation', 'tesseract' ); ?></h1>

		<div class="nav-links">

			<?php

				previous_post_link( '<div class="nav-previous">%link</div>', _x( '<span class="meta-nav">&larr;</span>&nbsp;%title', 'Previous post link', 'tesseract' ) );

				next_post_link(     '<div class="nav-next">%link</div>',     _x( '%title&nbsp;<span class="meta-nav">&rarr;</span>', 'Next post link',     'tesseract' ) );

			?>

		</div><!-- .nav-links -->

	</nav><!-- .navigation -->

	<?php

}

endif;



if ( ! function_exists( 'tesseract_posted_on' ) ) :

/**

 * Prints HTML with meta information for the current post-date/time and author.

 */

function tesseract_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( 'c' ) ),

		esc_html( get_the_date() ),

		esc_attr( get_the_modified_date( 'c' ) ),

		esc_html( get_the_modified_date() )

	);



	$posted_on = sprintf(

		_x( 'Posted by %s', 'post date', 'tesseract' ),

		'<span class="author vcard"><a class="url fn n" href="' . esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ) . '">' . esc_html( get_the_author() ) . '</a></span>' . ' on ' . '<a href="' . esc_url( get_permalink() ) . '" rel="bookmark">' . $time_string . '</a>'

	);



	$byline = sprintf(

		_x( 'by %s', 'post author', 'tesseract' ),

		'<span class="author vcard"><a class="url fn n" href="' . esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ) . '">' . esc_html( get_the_author() ) . '</a></span>'

	);



	echo '<span class="posted-on">' . $posted_on . '</span>';



}

endif;



if ( ! function_exists( 'the_archive_title' ) ) :

/**

 * Shim for `the_archive_title()`.

 *

 * Display the archive title based on the queried object.

 *

 * @todo Remove this function when WordPress 4.3 is released.

 *

 * @param string $before Optional. Content to prepend to the title. Default empty.

 * @param string $after  Optional. Content to append to the title. Default empty.

 */

function the_archive_title( $before = '', $after = '' ) {

	if ( is_category() ) {

		$title = sprintf( __( 'Category: %s', 'tesseract' ), single_cat_title( '', false ) );

	} elseif ( is_tag() ) {

		$title = sprintf( __( 'Tag: %s', 'tesseract' ), single_tag_title( '', false ) );

	} elseif ( is_author() ) {

		$title = sprintf( __( 'Author: %s', 'tesseract' ), '<span class="vcard">' . get_the_author() . '</span>' );

	} elseif ( is_year() ) {

		$title = sprintf( __( 'Year: %s', 'tesseract' ), get_the_date( _x( 'Y', 'yearly archives date format', 'tesseract' ) ) );

	} elseif ( is_month() ) {

		$title = sprintf( __( 'Month: %s', 'tesseract' ), get_the_date( _x( 'F Y', 'monthly archives date format', 'tesseract' ) ) );

	} elseif ( is_day() ) {

		$title = sprintf( __( 'Day: %s', 'tesseract' ), get_the_date( _x( 'F j, Y', 'daily archives date format', 'tesseract' ) ) );

	} elseif ( is_tax( 'post_format', 'post-format-aside' ) ) {

		$title = _x( 'Asides', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-gallery' ) ) {

		$title = _x( 'Galleries', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-image' ) ) {

		$title = _x( 'Images', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-video' ) ) {

		$title = _x( 'Videos', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-quote' ) ) {

		$title = _x( 'Quotes', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-link' ) ) {

		$title = _x( 'Links', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-status' ) ) {

		$title = _x( 'Statuses', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-audio' ) ) {

		$title = _x( 'Audio', 'post format archive title', 'tesseract' );

	} elseif ( is_tax( 'post_format', 'post-format-chat' ) ) {

		$title = _x( 'Chats', 'post format archive title', 'tesseract' );

	} elseif ( is_post_type_archive() ) {

		$title = sprintf( __( 'Archives: %s', 'tesseract' ), post_type_archive_title( '', false ) );

	} elseif ( is_tax() ) {

		$tax = get_taxonomy( get_queried_object()->taxonomy );

		/* translators: 1: Taxonomy singular name, 2: Current taxonomy term */

		$title = sprintf( __( '%1$s: %2$s', 'tesseract' ), $tax->labels->singular_name, single_term_title( '', false ) );

	} else {

		$title = __( 'Archives', 'tesseract' );

	}



	/**

	 * Filter the archive title.

	 *

	 * @param string $title Archive title to be displayed.

	 */

	$title = apply_filters( 'get_the_archive_title', $title );



	if ( ! empty( $title ) ) {

		echo $before . $title . $after;

	}

}

endif;



if ( ! function_exists( 'the_archive_description' ) ) :

/**

 * Shim for `the_archive_description()`.

 *

 * Display category, tag, or term description.

 *

 * @todo Remove this function when WordPress 4.3 is released.

 *

 * @param string $before Optional. Content to prepend to the description. Default empty.

 * @param string $after  Optional. Content to append to the description. Default empty.

 */

function the_archive_description( $before = '', $after = '' ) {

	$description = apply_filters( 'get_the_archive_description', term_description() );



	if ( ! empty( $description ) ) {

		/**

		 * Filter the archive description.

		 *

		 * @see term_description()

		 *

		 * @param string $description Archive description to be displayed.

		 */

		echo $before . $description . $after;

	}

}

endif;



/**

 * Returns true if a blog has more than 1 category.

 *

 * @return bool

 */

function tesseract_categorized_blog() {

	if ( false === ( $all_the_cool_cats = get_transient( 'tesseract_categories' ) ) ) {

		// Create an array of all the categories that are attached to posts.

		$all_the_cool_cats = get_categories( array(

			'fields'     => 'ids',

			'hide_empty' => 1,



			// We only need to know if there is more than one category.

			'number'     => 2,

		) );



		// Count the number of categories that are attached to the posts.

		$all_the_cool_cats = count( $all_the_cool_cats );



		set_transient( 'tesseract_categories', $all_the_cool_cats );

	}



	if ( $all_the_cool_cats > 1 ) {

		// This blog has more than 1 category so tesseract_categorized_blog should return true.

		return true;

	} else {

		// This blog has only 1 category so tesseract_categorized_blog should return false.

		return false;

	}

}



/**

 * Flush out the transients used in tesseract_categorized_blog.

 */

function tesseract_category_transient_flusher() {

	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {

		return;

	}

	// Like, beat it. Dig?

	delete_transient( 'tesseract_categories' );

}

add_action( 'edit_category', 'tesseract_category_transient_flusher' );

add_action( 'save_post',     'tesseract_category_transient_flusher' );

