<?php
/**
 * Custom template tags for this theme.
 *
 * Eventually, some of the functionality here could be replaced by core features
 *
 * @package Christmas
 */
 
/**
 * Returns true if a blog has more than 1 category
 */
function christmas_categorized_blog() {
	if ( false === ( $all_the_cool_cats = get_transient( 'all_the_cool_cats' ) ) ) {
		// Create an array of all the categories that are attached to posts
		$all_the_cool_cats = get_categories( array(
			'hide_empty' => 1,
		) );

		// Count the number of categories that are attached to the posts
		$all_the_cool_cats = count( $all_the_cool_cats );

		set_transient( 'all_the_cool_cats', $all_the_cool_cats );
	}

	if ( '1' != $all_the_cool_cats ) {
		// This blog has more than 1 category so christmas_categorized_blog should return true
		return true;
	} else {
		// This blog has only 1 category so christmas_categorized_blog should return false
		return false;
	}
}

if ( ! function_exists( 'christmas_time_link' ) ) :
/**
 * Gets a nicely formatted string for the published date.
 */
function christmas_time_link() {
	$time_string = '<time class="entry-date published updated" datetime="%1$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,
		get_the_date( DATE_W3C ),
		get_the_date(),
		get_the_modified_date( DATE_W3C ),
		get_the_modified_date()
	);

	// Wrap the time string in a link, and preface it with 'Posted on'.
	return sprintf(
		/* translators: %s: post date */
		__( '<span class="screen-reader-text"></span> %s', 'christmas' ),
		'<a href="' . esc_url( get_permalink() ) . '" rel="bookmark">' . $time_string . '</a>'
	);
}
endif;

if ( ! function_exists( 'christmas_the_custom_logo' ) ) :
/**
 * Displays the optional custom logo.
 *
 * Does nothing if the custom logo is not available.
 *
 * @since Twenty Sixteen 1.2
 */
function christmas_the_custom_logo() {
	if ( function_exists( 'the_custom_logo' ) ) {
		the_custom_logo();
	}
}
endif;

/**
 * Flush out the transients used in christmas_categorized_blog
 */
function christmas_category_transient_flusher() {
	// Like, beat it. Dig?
	delete_transient( 'all_the_cool_cats' );
}
add_action( 'edit_category', 'christmas_category_transient_flusher' );
add_action( 'save_post',     'christmas_category_transient_flusher' );
