<?php
/**
 * Post Media Class
 *
 * @package    Modern
 * @copyright  WebMan Design, Oliver Juhas
 *
 * @since    2.0.0
 * @version  2.4.0
 *
 * Contents:
 *
 *  0) Init
 * 10) Size
 * 20) Display
 * 30) Media
 */
class Modern_Post_Media {


	/**
	 * 0) Init
	 */

		private static $instance;


		/**
		 * Constructor
		 *
		 * @since    2.0.0
		 * @version  2.4.0
		 */
		private function __construct() {

			// Processing

				// Setup

					// Post formats

						/**
						 * @link  https://codex.wordpress.org/Function_Reference/add_theme_support#Post_Formats
						 */

						add_theme_support( 'post-formats', array(
							'audio',
							'gallery',
							'image',
							'link',
							'quote',
							'status',
							'video',
						) );

				// Hooks

					// Actions

						add_action( 'tha_entry_top', __CLASS__ . '::media' );

					// Filters

						add_filter( 'wmhook_modern_post_media_pre', __CLASS__ . '::media_disable' );

						add_filter( 'wmhook_modern_post_media_image_size', __CLASS__ . '::size' );

						/**
						 * @todo  Remove with WP 5.2+?
						 * @link  https://core.trac.wordpress.org/ticket/43826
						 */
						add_filter( 'get_post_gallery', __CLASS__ . '::get_post_gallery_fix', 10, 2 );

		} // /__construct


		/**
		 * Initialization (get instance)
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 */
		public static function init() {

			// Processing

				if ( null === self::$instance ) {
					self::$instance = new self;
				}


			// Output

				return self::$instance;

		} // /init


	/**
	 * 10) Size
	 */

		/**
		 * Post thumbnail (featured image) display size
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string  $image_size
		 * @param  integer $image_order  Gallery post format related only: image order number.
		 * @param  integer $image_count  Gallery post format related only: images count.
		 * @param  integer $image_id     Gallery post format related only: image ID.
		 */
		public static function size( $image_size, $image_order = 0, $image_count = 0, $image_id = 0 ) {

			// Processing

				if ( is_attachment() ) {
					$image_size = 'medium';
				} elseif ( Modern_Post::is_singular() ) {
					$image_size = 'large';
				} else {
					$image_size = 'thumbnail';
				}


			// Output

				return $image_size;

		} // /size


	/**
	 * 20) Display
	 */

		/**
		 * Entry media
		 *
		 * @since    2.0.0
		 * @version  2.3.0
		 *
		 * @param  array $args  Optional post helper variables.
		 */
		public static function media( $args = array() ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_pre', false, $args );

				if ( false !== $pre ) {
					echo $pre; // Functionality bypass via filter.
					return;
				}


			// Helper variables

				$output     = apply_filters( 'wmhook_modern_post_media_output_pre', '', $args );
				$image_size = apply_filters( 'wmhook_modern_post_media_image_size', 'thumbnail', $args );
				$class      = 'entry-media';

				$supported_formats = (array) get_theme_support( 'post-formats' );

				if ( $supported_formats[0] ) {
					$supported_formats = (array) $supported_formats[0];
				}


			// Processing

				if (
					current_theme_supports( 'post-formats' )
					&& apply_filters( 'wmhook_modern_post_media_condition', (
						! is_single( get_the_ID() )
						|| ! class_exists( 'Modern_Post_Formats' )
					), $args )
				) {

					switch ( $post_format = apply_filters( 'wmhook_modern_post_media_post_format', get_post_format(), $args ) ) {

						case 'audio':
							if ( in_array( $post_format, $supported_formats ) ) {
								$output .= self::audio( $image_size );
							}
							break;

						case 'gallery':
							if ( in_array( $post_format, $supported_formats ) ) {
								$output .= self::gallery( $image_size );
							}
							break;

						case 'image':
							if ( in_array( $post_format, $supported_formats ) ) {
								$output .= self::image_content( $image_size );
							}
							break;

						case 'status':
							if ( in_array( $post_format, $supported_formats ) ) {
								$output .= self::image_avatar( $image_size );
							}
							break;

						case 'video':
							if ( in_array( $post_format, $supported_formats ) ) {
								$output .= self::video( $image_size );
							}
							break;

						default:
							break;

					}

				}

				if ( empty( $output ) ) {
					$output .= self::image_featured( $image_size );
				}


			// Output

				if ( $output ) {
					echo '<div class="' . esc_attr( $class ) . '">' . $output . '</div>';
				}

		} // /media


		/**
		 * Do not display entry media on top of single post content
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  mixed $pre
		 */
		public static function media_disable( $pre ) {

			// Processing

				if (
					Modern_Post::is_singular()
					&& Modern_Post::is_paged()
				) {
					$pre = '';
				}


			// Output

				return $pre;

		} // /media_disable


	/**
	 * 30) Media
	 */

		/**
		 * Featured image
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function image_featured( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_image_featured_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Helper variables

				$output   = '';
				$post_id  = get_the_ID();
				$image_id = ( is_attachment() ) ? ( $post_id ) : ( get_post_thumbnail_id( $post_id ) );


			// Processing

				if (
					has_post_thumbnail( $post_id )
					|| (
						is_attachment()
						&& $attachment_image = wp_get_attachment_image( $image_id, (string) $image_size )
					)
				) {

					$image_link = ( Modern_Post::is_singular( $post_id ) || is_attachment() ) ? ( wp_get_attachment_image_src( $image_id, 'full' ) ) : ( array( esc_url( get_permalink() ) ) );
					$image_link = array_filter( (array) apply_filters( 'wmhook_modern_post_media_image_featured_link', $image_link ) );

					$output .= '<figure class="post-thumbnail">';

						if ( ! empty( $image_link ) ) {
							$output .= '<a href="' . esc_url( $image_link[0] ) . '">';
						}

						if ( is_attachment() ) {
							$output .= $attachment_image;
						} else {
							$output .= get_the_post_thumbnail(
								null,
								(string) $image_size
							);
						}

						if ( ! empty( $image_link ) ) {
							$output .= '</a>';
						}

					$output .= '</figure>';

				}


			// Output

				return $output;

		} // /image_featured


		/**
		 * Featured or content image
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function image_content( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_image_content_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Requirements check

				if ( ! class_exists( 'Modern_Post_Formats' ) ) {
					return;
				}


			// Helper variables

				$output  = '';
				$post_id = get_the_ID();


			// Processing

				if ( has_post_thumbnail( $post_id ) ) {

					$output .= self::image_featured( $image_size );

				} else {

					$image_link = ( is_single( $post_id ) || is_attachment() ) ? ( wp_get_attachment_image_src( $image_id, 'full' ) ) : ( array( esc_url( get_permalink() ) ) );
					$image_link = array_filter( (array) apply_filters( 'wmhook_modern_post_media_image_content_link', $image_link ) );
					$post_media = (string) Modern_Post_Formats::get();

					// Get the image HTML tag

						if ( is_numeric( $post_media ) ) {
							$post_media = wp_get_attachment_image( absint( $post_media ), $image_size );
						} elseif ( is_string( $post_media ) ) {
							$post_media = '<img src="' . esc_url( $post_media ) . '" alt="' . esc_attr( the_title_attribute( 'echo=0' ) ) . '" title="' . esc_attr( the_title_attribute( 'echo=0' ) ) . '" />';
						} else {
							$post_media = false;
						}

					// Set the output

						if ( $post_media ) {
							$output .= '<figure class="post-thumbnail">';

								if ( ! empty( $image_link ) ) {
									$output .= '<a href="' . esc_url( $image_link[0] ) . '">';
								}

								$output .= $post_media;

								if ( ! empty( $image_link ) ) {
									$output .= '</a>';
								}

							$output .= '</figure>';
						}

				}


			// Output

				return $output;

		} // /image_content


		/**
		 * Featured image or avatar
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function image_avatar( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_image_avatar_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Helper variables

				$output = '';


			// Processing

				if ( has_post_thumbnail( get_the_ID() ) ) {

					$output .= self::image_featured( $image_size );

				} else {

					// Get image width for avatar

						if ( in_array( $image_size, array( 'thumbnail', 'medium', 'large' ) ) ) {

							$image_width = get_option( $image_size . '_size_w' );

						} else {

							global $_wp_additional_image_sizes;

							$image_width = 448;

							if ( isset( $_wp_additional_image_sizes[ $image_size ] ) ) {
								$image_width = $_wp_additional_image_sizes[ $image_size ]['width'];
							}

						}

					// Set the output

						$output .= '<figure class="post-thumbnail">';

							$output .= get_avatar( get_the_author_meta( 'ID' ), absint( $image_width ) );

						$output .= '</figure>';

				}


			// Output

				return $output;

		} // /image_avatar


		/**
		 * Gallery
		 *
		 * Displays images from gallery first.
		 * If no gallery exists, displays featured image.
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function gallery( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_gallery_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Requirements check

				if ( ! class_exists( 'Modern_Post_Formats' ) ) {
					return;
				}


			// Helper variables

				$output       = '';
				$link_url     = get_permalink();
				$images_count = apply_filters( 'wmhook_modern_post_media_gallery_images_count', 3 );
				$post_media   = array_filter( array_slice( explode( ',', (string) Modern_Post_Formats::get() ), 0, absint( $images_count ) ) ); // Get only $images_count images from gallery


			// Processing

				if ( ! empty( $post_media ) ) {

					$output .= '<div class="entry-media-gallery-images image-count-' . absint( count( $post_media ) ) . '">';

					$i = 0;

					foreach( $post_media as $image_id ) {
						$output .= '<a href="' . esc_url( $link_url ) . '" class="entry-media-gallery-image">';
						$output .= wp_get_attachment_image( absint( $image_id ), (string) apply_filters( 'wmhook_modern_post_media_gallery_image_size', $image_size, ++$i, count( $post_media ), $image_id ) );
						$output .= '</a>';
					}

					$output .= '</div>';

				} else {

					$output .= self::image_featured( $image_size );

				}


			// Output

				return $output;

		} // /gallery


		/**
		 * Audio
		 *
		 * Displays featured image only if it's a shortcode
		 * and it's not a playlist shortcode.
		 * After the image it displays audio player.
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function audio( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_audio_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Requirements check

				if ( ! class_exists( 'Modern_Post_Formats' ) ) {
					return;
				}


			// Helper variables

				$output       = '';
				$post_media   = (string) Modern_Post_Formats::get();
				$is_shortcode = ( 0 === strpos( $post_media, '[' ) );


			// Processing

				if ( (bool) apply_filters( 'wmhook_modern_post_media_audio_thumbnail_enable',
					empty( $post_media ) || $is_shortcode,
					$post_media,
					$is_shortcode
				) ) {
					$output .= self::image_featured( $image_size );
				}

				if ( $post_media ) {

					if ( $is_shortcode ) {
					// Display also featured image with shortcode media.

						$output .= do_shortcode( $post_media );

					} else {
					// No featured image for oembed media (iframe output).

						$output .= wp_oembed_get( $post_media );

					}

				}


			// Output

				return $output;

		} // /audio


		/**
		 * Video
		 *
		 * @since    2.0.0
		 * @version  2.0.0
		 *
		 * @param  string $image_size
		 */
		public static function video( $image_size ) {

			// Pre

				$pre = apply_filters( 'wmhook_modern_post_media_video_pre', false, $image_size );

				if ( false !== $pre ) {
					return $pre;
				}


			// Requirements check

				if ( ! class_exists( 'Modern_Post_Formats' ) ) {
					return;
				}


			// Helper variables

				$output     = '';
				$post_media = (string) Modern_Post_Formats::get();


			// Processing

				if ( $post_media ) {

					if ( 0 === strpos( $post_media, '[' ) ) {

						$post_media = do_shortcode( $post_media );

					} else {

						/**
						 * Filter the oEmbed HTML
						 *
						 * This is to provide compatibility with Jetpack Responsive Videos.
						 *
						 * By default there is no filter hook in `wp_oembed_get()` that Jetpack
						 * Responsive Videos hooks onto, that's why we need to add it here.
						 *
						 * @param  mixed  $html    The HTML output.
						 * @param  string $url     The attempted embed URL (the $post_media variable).
						 * @param  array  $attr    An array of shortcode attributes.
						 * @param  int    $post_id Post ID.
						 */
						$post_media = apply_filters( 'embed_oembed_html', wp_oembed_get( $post_media ), $post_media, array(), get_the_ID() );

					}

					$output .= $post_media;

				} else {

					$output .= self::image_featured( $image_size );

				}


			// Output

				return $output;

		} // /video


		/**
		 * @todo  Remove with WP 5.2+?
		 *
		 * Fix for retrieving Gutenberg gallery setup parameters in array.
		 *
		 * @link  https://core.trac.wordpress.org/ticket/43826
		 *
		 * @since    2.4.0
		 * @version  2.4.0
		 *
		 * @param  array       $gallery  The first-found post gallery.
		 * @param  int|WP_Post $post     Post ID or object.
		 */
		public static function get_post_gallery_fix( $gallery, $post ) {

			// Variables

				$post = get_post( $post );


			// Requirements check

				if (
					$gallery
					|| ! $post
					|| ! function_exists( 'has_blocks' )
					|| ! has_blocks( $post->post_content )
				) {
					return $gallery;
				}


			// Processing

				preg_match_all(
					'/wp:gallery(.*)-->/i',
					$post->post_content,
					$galleries
				);

				if ( ! empty( $galleries[1] ) ) {
					$gallery = json_decode( reset( $galleries[1] ), true );
					foreach ( $gallery as $key => $value ) {
						if ( is_array( $value ) ) {
							$gallery[ $key ] = implode( ',', $value );
						}
					}
				}


			// Output

				return $gallery;

		} // /get_post_gallery_fix


} // /Modern_Post_Media

add_action( 'after_setup_theme', 'Modern_Post_Media::init' );