<?php
if( ! defined( 'ABSPATH' ) ) {  exit;  }    // Exit if accessed directly


/*
 * 	The loop-index.php file is responsible to display wordpress blog posts
 *	Since this theme supports post formats (different styling and behaviour of certain posts, for example galleries, tweets etc)
 *	the output of the  loop-index.php file is filtered before it is passed to the users browser.
 *
 *	The filtering takes place in the functions defined in this file
 */



// ========================= default post format ============================

add_filter( 'post-format-standard', 'avia_default_title_filter', 10, 1 );

// ========================= gallery post format ============================

add_filter( 'post-format-gallery', 'avia_gallery_slideshow_filter', 10, 1 );

// ========================= video post format ==============================

add_filter( 'post-format-video', 'avia_video_slideshow_filter', 10, 1 );

// ========================= image post format ==============================

add_filter( 'post-format-image', 'avia_image_slideshow_filter', 10, 1 );

// ========================= link post format ===============================

add_filter( 'post-format-link', 'avia_link_content_filter', 10, 1 );

// ========================= blockquote post format =========================

add_filter( 'post-format-quote', 'avia_quote_content_filter', 10, 1 );

// ========================= audio post format =========================

add_filter( 'post-format-audio', 'avia_audio_content_filter', 10, 1 );


// =============================================================================================================================


if( ! function_exists( 'avia_default_title_filter' ) )
{
	/**
	 * The avia_default_title_filter creates the default title for your posts.
	 * This function is used by most post types
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_default_title_filter( $current_post )
	{
		if( ! empty( $current_post['title'] ) )
		{
			$default_heading = is_singular() ? 'h1' : 'h2';
			$args = array(
						'heading'		=> $default_heading,
						'extra_class'	=> ''
					);

			/**
			 * @since 4.5.5
			 * @return array
			 */
			$args = apply_filters( 'avf_customize_heading_settings', $args, 'avia_default_title_filter', array( $current_post ) );

			$heading = ! empty( $args['heading'] ) ? $args['heading'] : $default_heading;
			$css = ! empty( $args['extra_class'] ) ? $args['extra_class'] : '';

			$output  = '';

			//$output .= "<{$heading} class='post-title entry-title ". avia_offset_class('meta', false). "'>";
			$output .= "<{$heading} class='post-title entry-title {$css}' " . avia_markup_helper( array( 'context' => 'entry_title', 'echo' => false ) ) . '>';

			if( ! is_singular() )
			{
				$output .=	'<a href="' . get_permalink() . '" rel="bookmark" title="' . __( 'Permanent Link:', 'avia_framework' ) . ' ' . esc_attr( $current_post['title'] ) . '">';
				$output .=		$current_post['title'];
				$output .=		'<span class="post-format-icon minor-meta"></span>';
				$output .=	'</a>';
			}
			else
			{
				$output .=		$current_post['title'];
				$output .=		'<span class="post-format-icon minor-meta"></span>';
			}

			$output .= "</{$heading}>";

			$current_post['title'] = $output;
		}

		return $current_post;
	}
}

if( ! function_exists( 'avia_audio_content_filter' ) )
{
	/**
	 * The avia_audio_content_filter checks if a audio embed is provided and extracts it
	 * If no slideshow is set, it checks if the content holds a video url, removes it and uses it for the slideshow
	 * The filter also sets the height of the slideshow to fullsize, and even on overview posts all slides are displayed
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_audio_content_filter( $current_post )
	{
		$match_audio = array();
		preg_match( "!\[audio.+?\]\[\/audio\]!", $current_post['content'], $match_audio );

		if( ! empty( $match_audio ) )
		{
			$current_post['before_content'] = do_shortcode( $match_audio[0] );
			$current_post['content'] = str_replace( $match_audio[0], '', $current_post['content'] );
		}

		return avia_default_title_filter( $current_post );
	}
}

if( ! function_exists( 'avia_gallery_slideshow_filter' ) )
{
	/**
	 * The avia_gallery_slideshow_filter checks if a gallery is set for an entry with post type gallery
	 * and extracts the gallery, then displays it at the top of the entry
	 *
	 * The filter also sets the height of the slideshow to fullsize, and even on overview posts all slides are displayed
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_gallery_slideshow_filter( $current_post )
	{
		$match_gallery = array();

		//search for the first av gallery or gallery shortcode
		preg_match( "!\[(?:av_)?gallery.+?\]!", $current_post['content'], $match_gallery );

		if( ! empty( $match_gallery ) )
		{
			$gallery = $match_gallery[0];

			if( strpos( $gallery, 'av_' ) === false )
			{
				$gallery = str_replace( 'gallery', 'av_gallery', $gallery );
			}

			if( strpos( $gallery, 'style' ) === false )
			{
				$gallery = str_replace( ']', " style='big_thumb' preview_size='gallery']", $gallery );
			}

			$current_post['before_content'] = do_shortcode( $gallery );
			$current_post['content'] = str_replace( $match_gallery[0], '', $current_post['content'] );
			$current_post['slider'] = '';
		}

		return avia_default_title_filter( $current_post );
	}
}

if( ! function_exists( 'avia_video_slideshow_filter' ) )
{
	/**
	 * The avia_video_slideshow_filter checks if a video slideshow is set for an entry with post type gallery
	 * If no slideshow is set, it checks if the content holds a video url, removes it and uses it for the slideshow
	 * The filter also sets the height of the slideshow to fullsize, and even on overview posts all slides are displayed
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_video_slideshow_filter( $current_post )
	{
		//replace empty url strings with an embed code
	 	$current_post['content'] = preg_replace( '|^\s*(https?://[^\s"]+)\s*$|im', '[embed]$1[/embed]', $current_post['content'] );

		$match_video = array();

		//extrect embed and av_video codes from the content. if any were found execute them and prepend them to the post
		preg_match( "!\[embed.+?\]|\[av_video.+?\]!", $current_post['content'], $match_video );

		if( ! empty( $match_video ) )
		{
			global $wp_embed;

			$video = $match_video[0];
			$current_post['before_content'] = do_shortcode( $wp_embed->run_shortcode( $video ) );
			$current_post['content'] = str_replace( $match_video[0], '', $current_post['content'] );
			$current_post['slider'] = '';
		}

		return avia_default_title_filter( $current_post );
	}
}

if( ! function_exists( 'avia_image_slideshow_filter' ) )
{
	/**
	 * The avia_image_slideshow_filter checks if an image is set for an entry with post type image
	 * If no image is set, it checks if the content holds an image, removes it and uses it for the slideshow
	 * The filter also sets the height of the slideshow to fullsize, and even on overview posts all slides are displayed
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_image_slideshow_filter( $current_post )
	{
		$prepend_image = get_the_post_thumbnail( get_the_ID(), 'large' );
		$image = '';

		if( ! $prepend_image )
		{
			$image = avia_regex( $current_post['content'], 'image' );
			if( is_array( $image ) )
			{
				$image = $image[0];
				$prepend_image = '<div class="avia-post-format-image"><img src="' . $image . '" alt="" title ="" /></div>';
			}
			else
			{
				$image = avia_regex( $current_post['content'],'<img />', '' );
				if( is_array( $image ) )
				{
					$prepend_image = '<div class="avia-post-format-image">' . $image[0] . '</div>';
				}
			}
		}
		else
		{
			$large_image = wp_get_attachment_image_src( get_post_thumbnail_id( get_the_ID() ), 'extra_large' );
			if( is_array( $large_image ) )
			{
				$prepend_image = '<div class="avia-post-format-image"><a href="' . $large_image[0] . '">' . $prepend_image . '</a></div>';
			}
			else
			{
				$prepend_image = '<div class="avia-post-format-image">' . $prepend_image . '</div>';
			}
		}


		if( ! empty( $prepend_image ) && is_string( $prepend_image ) )
		{
			if( $image )
			{
				$current_post['content'] = str_replace( $image, '', $current_post['content'] );
			}

			$current_post['before_content'] = $prepend_image;
			$current_post['slider'] = '';
		}

		/**
		 * Backwards comp. to checkbox prior v4.5.3 (now select box with '' or '1')
		 */
		$hide_featured_image = get_post_meta( get_the_ID(), '_avia_hide_featured_image', true );
		$hide_featured_image = empty( $hide_featured_image ) ? false : true;
		if( is_single( get_the_ID() ) && $hide_featured_image )
		{
			$current_post['before_content'] = '';
		}

		return avia_default_title_filter( $current_post );
	}
}


if( ! function_exists( 'avia_link_content_filter' ) )
{
	/**
	 * The avia_link_content_filter checks if the beginning of the post is a url. If thats the case this url will be aplied to the title.
	 * Otherwise the theme will search for the first URL within the content and apply this URL
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_link_content_filter( $current_post )
	{
		//	retrieve the link for the post
		$link = '';
		$newlink = false;
		$pattern1 = '$^\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]$i';
		$pattern2 = '!^\<a.+?<\/a>!';
		$pattern3 = '!\<a.+?<\/a>!';

		//	if the url is at the begnning of the content extract it
		preg_match( $pattern1, $current_post['content'] , $link );

		if( ! empty( $link[0] ) )
		{
			$link = $link[0];
			$markup = avia_markup_helper( array( 'context' => 'entry_title', 'echo' => false ) );
			$current_post['title'] = "<a href='{$link}' rel='bookmark' title='" . __( 'Link to:', 'avia_framework' ) . ' ' . the_title_attribute( 'echo=0' ) . "' {$markup}>" . get_the_title() . '</a>';
			$current_post['content'] = preg_replace( '!' . str_replace( '?', '\?', $link ) . '!', '', $current_post['content'], 1 );
		}
		else
		{
			preg_match( $pattern2, $current_post['content'] , $link );
			if( ! empty( $link[0] ) )
			{
				$link = $link[0];
				$current_post['title'] = $link;
				$current_post['content'] = preg_replace( '!' . str_replace( '?', '\?', $link ) . '!', '', $current_post['content'], 1 );

				$newlink = get_url_in_content( $link );
			}
			else
			{
				preg_match( $pattern3, $current_post['content'], $link );
				if( ! empty( $link[0] ) )
				{
					$current_post['title'] = $link[0];
					$newlink = get_url_in_content( $link[0] );
				}
			}
		}

		if( $link )
		{
			if( is_array( $link ) )
			{
				$link = $link[0];
			}

			if( $newlink )
			{
				$link = $newlink;
			}

			$default_heading = is_singular() ? 'h1' : 'h2';
			$args = array(
						'heading'		=> $default_heading,
						'extra_class'	=> ''
					);

			/**
			 * @since 4.5.5
			 * @return array
			 */
			$args = apply_filters( 'avf_customize_heading_settings', $args, 'avia_link_content_filter', array( $current_post ) );

			$heading = ! empty( $args['heading'] ) ? $args['heading'] : $default_heading;
			$css = ! empty( $args['extra_class'] ) ? $args['extra_class'] : '';


			//$current_post['title'] = "<{$heading} class='post-title entry-title ". avia_offset_class('meta', false). "'>".$current_post['title']."</{$heading}>";
			$current_post['title'] = "<{$heading} class='post-title entry-title {$css}' " . avia_markup_helper( array( 'context' => 'entry_title', 'echo' => false ) ) . '>' . $current_post['title'] . "</{$heading}>";

			//needs to be set for masonry
			$current_post['url'] = $link;
		}
		else
		{
			$current_post = avia_default_title_filter( $current_post );
		}

		return $current_post;
	}
}

if( ! function_exists( 'avia_quote_content_filter' ) )
{
	/**
	 * Function for posts of type quote: title is wrapped in blockquote tags instead of h1
	 *
	 * @since ???
	 * @param array $current_post
	 * @return array
	 */
	function avia_quote_content_filter( $current_post )
	{
		if( ! empty( $current_post['title'] ) )
		{
			//$current_post['title'] = "<div class='". avia_offset_class('meta', false). "'><blockquote class='first-quote'>".$current_post['title']."</blockquote></div>";
			$current_post['title'] = "<blockquote class='first-quote' " . avia_markup_helper( array( 'context' => 'entry_title', 'echo'=> false ) ) . '>' . $current_post['title'] . '</blockquote>';
		}

		return $current_post;
	}
}