class-schema.php

<?php

class CNWS_Schema {

	public function __construct() {

		$this->hooks();
	}


	public function hooks() {

		add_action( 'wp_head', [ $this, 'generate' ], 5 );

	}


	public function generate() {

		if ( is_singular( 'recipe' ) ) {
			printf(
				'<script type="application/ld+json">%1$s</script>%2$s',
				wp_json_encode( $this->schema(), JSON_UNESCAPED_SLASHES ),
				"\n"
			);
		}

	}


	public function recipe() {

		return get_post();

	}


	public function title() {

		return esc_html( get_the_title( get_the_ID() ) );
	}


	public function image( $post_id = 0 ) {

		if ( ! isset( $post_id ) ) {
			$post_id = get_the_ID();
		}

		$images = [];

		$sizes = [
			'1x1'  => 'w=320&h=320&post_id=' . $post_id,
			'4x3'  => 'w=320&h=240&post_id=' . $post_id,
			'16x9' => 'w=320&h=180&post_id=' . $post_id,
		];

		foreach ( $sizes as $key => $size ) {
			$images[] = kama_thumb_src( $size );
		}

		return $images;

	}


	public function description() {

		return get_truncate( wp_strip_all_tags( $this->recipe()->post_content ), 50, '', '' );
	}


	public function field( $field_name ) {

		return get_field( $field_name ) ? wp_strip_all_tags( get_field( $field_name ) ) : '';

	}


	public function ingredients() {

		$ingredients = get_field( 'ingridients' );

		$ingredients_schema = [];

		if ( $ingredients ) {
			foreach ( $ingredients as $ingredient ) {

				if ( isset( $ingredient['title'] ) && ! empty( $ingredient['title'] ) ) {
					$ingredients_schema[] = wp_strip_all_tags( $ingredient['title'] ) . ' - ' . $ingredient['value'];
				}

				if ( isset( $ingredient['titile_tag'] ) && ! empty( $ingredient['titile_tag'] ) && ! is_wp_error( $ingredient['titile_tag'] ) ) {
					$ingredients_schema[] = wp_strip_all_tags( $ingredient['titile_tag']->name ) . ' - ' . $ingredient['value'];
				}

			}
		}

		return $ingredients_schema;
	}


	public function steps() {

		$steps        = get_field( 'progress' );
		$steps_schema = [];

		if ( $steps ) {
			foreach ( $steps as $key => $step ) {
				$steps_schema[] = [
					'@type' => 'HowToStep',
					'text'  => $step['text'],
					'image' => kama_thumb_src( 'w=320&h=320&post_id=' . $step['photo']['url'] ),
					'url'   => get_permalink() . '#recipe-step-' . esc_attr( $key + 1 ),
				];

			}
		}

		return $steps_schema;

	}


	public function video() {

		$video      = get_field( 'video' );
		$video_desc = get_field( 'video' );

		return [];
	}


	public function recipe_category( $post_id, $tax ) {

		$categories      = get_the_terms( $post_id, $tax );
		$categories_list = [];

		if ( false !== $categories && ! is_wp_error( $categories ) && is_array( $categories ) ) {
			foreach ( $categories as $category ) {
				$categories_list[] = $category->name;
			}
		}

		return implode( ', ', $categories_list );
	}


	public function recipe_yield() {

		$serving = '';
		if ( get_field( 'serving' ) ) {
			$serving = preg_replace( '/[^0-9]/', '', get_field( 'serving' ) );
		}

		return $serving;
	}


	public function schema() {

		return [
			'@context'           => 'https://schema.org/',
			'@type'              => 'Recipe',
			'name'               => $this->title(),
			'image'              => $this->image(),
			'author'             => [
				'@type' => 'Person',
				'name'  => get_the_author_meta( 'display_name', $this->recipe()->post_author ),
			],
			'datePublished'      => get_the_time( 'Y-m-d' ),
			'description'        => $this->description(),
			'recipeCuisine'      => $this->field( 'recipecategory' ),
			'prepTime'           => recipe_time( 'time_preparation', '', true ),
			'totalTime'          => recipe_time( 'time_total', '', true ),
			'keywords'           => $this->field( 'keywords' ),
			'recipeYield'        => $this->recipe_yield(),
			'recipeCategory'     => $this->recipe_category( get_the_ID(), 'recipe_tag' ),
			'nutrition'          => [
				'@type'    => 'NutritionInformation',
				'calories' => $this->field( 'calories' ),
			],
			'aggregateRating'    => [
				'@type'       => 'AggregateRating',
				'ratingValue' => get_post_meta( get_the_ID(), 'ratings_average', true ),
				'ratingCount' => get_post_meta( get_the_ID(), 'ratings_users', true ),
			],
			'recipeIngredient'   => $this->ingredients(),
			'recipeInstructions' => $this->steps(),
			'video'              => [],
		];

	}
}

new CNWS_Schema;