<?php
/**
 * Custom functions that act independently of the theme templates.
 *
 * Eventually, some of the functionality here could be replaced by core features.
 *
 * @package Webion
 */

/**
 * Sidebar position
 */
add_filter( 'theme_mod_sidebar_position', 'webion_set_post_meta_value' );

/**
 * Container type
 */
add_filter( 'theme_mod_container_type', 'webion_set_post_meta_value' );

/**
 * Header layout type
 */
add_filter( 'theme_mod_header_layout_type', 'webion_set_header_layout_value' );

/**
 * Add a pingback url auto-discovery header for single posts, pages, or attachments.
 */
function webion_pingback_header() {
	if ( is_singular() && pings_open() ) {
		echo '<link rel="pingback" href="', esc_url( get_bloginfo( 'pingback_url' ) ), '">';
	}
}
add_action( 'wp_head', 'webion_pingback_header' );


/**
 * Set post specific meta value.
 *
 * @param  string $value Default meta-value.
 * @return string
 */
function webion_set_post_meta_value( $value ) {
	$queried_obj = webion_get_queried_obj();

	if ( ! $queried_obj ) {
		return $value;
	}

	$meta_key   = 'webion_' . str_replace( 'theme_mod_', '', current_filter() );
	$meta_value = get_post_meta( $queried_obj, $meta_key, true );

	if ( ! $meta_value || 'inherit' === $meta_value ) {
		return $value;
	}

	return $meta_value;
}

/**
 * Set header layout meta value.
 *
 * @param  string $value Default meta-value.
 * @return string
 */
function webion_set_header_layout_value( $value ) {

	if ( wp_is_mobile() ) {
		// return 'mobile';
	}

	return webion_set_post_meta_value( $value );
}

/**
 * Get queried object.
 *
 * @return string|boolean
 */
function webion_get_queried_obj() {
	$queried_obj = apply_filters( 'webion-theme/posts/queried_object_id', false );

	if ( ! $queried_obj && ! webion_maybe_need_rewrite_mod() ) {
		return false;
	}

	$queried_obj = is_home() ? get_option( 'page_for_posts' ) : false;
	$queried_obj = ! $queried_obj ? get_the_id() : $queried_obj;

	return $queried_obj;
}

/**
 * Check if we need to try rewrite theme mod or not
 *
 * @return boolean
 */
function webion_maybe_need_rewrite_mod() {

	if ( is_front_page() && 'page' !== get_option( 'show_on_front' ) ) {
		return false;
	}

	if ( is_home() && 'page' == get_option( 'show_on_front' ) ) {
		return true;
	}

	if ( ! is_singular() ) {
		return false;
	}

	return true;
}

/**
 * Render existing macros in passed string.
 *
 * @since  1.0.0
 * @param  string $string String to parse.
 * @return string
 */
function webion_render_macros( $string ) {

	$macros = apply_filters( 'webion-theme/data_macros', array(
		'/%%year%%/' => date( 'Y' ),
		'/%%date%%/' => date( get_option( 'date_format' ) ),
		'/%%site-name%%/' => get_bloginfo( 'name' ),
		'/%%privacy-policy%%/' => webion_get_privacy_link(),
	) );

	return preg_replace( array_keys( $macros ), array_values( $macros ), $string );
}

/**
 * Get privacy policy link
 *
 * @return string
 */
function webion_get_privacy_link() {
	$page = get_page_by_path( 'privacy-policy' );
	
	if ( ! is_object( $page ) ) {
		return;
	}

	return '<a class="privacy_link" href="' . esc_url( get_permalink( $page->ID ) ) . '">' . esc_html( $page->post_title ) . '</a>';
}

/**
 * Render font icons in content
 *
 * @param  string $content content to render
 * @return string
 */
function webion_render_icons( $content ) {
	$icons     = webion_get_render_icons_set();
	$icons_set = implode( '|', array_keys( $icons ) );

	$regex = '/icon:(' . $icons_set . ')?:?([a-zA-Z0-9-_]+)/';

	return preg_replace_callback( $regex, 'webion_render_icons_callback', $content );
}

/**
 * Callback for icons render.
 *
 * @param  array $matches Search matches array.
 * @return string
 */
function webion_render_icons_callback( $matches ) {

	if ( empty( $matches[1] ) && empty( $matches[2] ) ) {
		return $matches[0];
	}

	if ( empty( $matches[1] ) ) {
		return sprintf( '<i class="fa fa-%s"></i>', $matches[2] );
	}

	$icons = webion_get_render_icons_set();

	if ( ! isset( $icons[ $matches[1] ] ) ) {
		return $matches[0];
	}

	return sprintf( $icons[ $matches[1] ], $matches[2] );
}

/**
 * Get list of icons to render.
 *
 * @return array
 */
function webion_get_render_icons_set() {
	return apply_filters( 'webion-theme/icons/icons-set', array(
		'fa'       => '<i class="fa fa-%s"></i>',
		'material' => '<i class="material-icons">%s</i>',
	) );
}

/**
 * Replace %s with theme URL.
 *
 * @param  string $url Formatted URL to parse.
 * @return string
 */
function webion_render_theme_url( $url ) {
	return sprintf( $url, get_template_directory_uri() );
}

/**
 * Get post template part slug.
 *
 * @return string
 */
function webion_get_post_template_part_slug() {
	return apply_filters( 'webion-theme/posts/template-part-slug', 'template-parts/content' );
}

/**
 * Get post template part slug.
 *
 * @return string
 */
function webion_get_post_style() {
	return apply_filters( 'webion-theme/posts/post-style', false );
}

/**
 * Return a list of allowed tags and attributes.
 *
 * @param array $additional_allowed_html Additional allowed tags and attributes
 *
 * @return array
 */
function webion_kses_post_allowed_html( $additional_allowed_html = array() ) {
	$allowed_html = wp_kses_allowed_html( 'post' );

	if ( ! empty( $additional_allowed_html ) ) {
		foreach ( $additional_allowed_html as $tag => $attr ) {
			if ( array_key_exists( $tag, $allowed_html ) ) {
				$allowed_html[ $tag ] = array_merge( $allowed_html[ $tag ], $attr );
			} else {
				$allowed_html[ $tag ] = $attr;
			}
		}
	}

	return $allowed_html;
}

/**
 * Check if passed meta data is visible in current context.
 *
 * @since  1.0.0
 * @param  string $meta    Meta setting to check.
 * @param  string $context Current post context - 'single' or 'loop'.
 * @return bool
 */
function webion_is_meta_visible( $meta, $context = 'loop' ) {

	if ( ! $meta ) {
		return false;
	}

	$meta_enabled = get_theme_mod( $meta, webion_theme()->customizer->get_default( $meta ) );

	switch ( $context ) {

		case 'loop':

			if ( ! is_single() && $meta_enabled ) {
				return true;
			} else {
				return false;
			}

		case 'single':

			if ( is_single() && $meta_enabled ) {
				return true;
			} else {
				return false;
			}
	}
	return false;
}