<?php
/**
 * Helper functions for the recipe import.
 *
 * @link       https://bootstrapped.ventures
 * @since      5.2.0
 *
 * @package    WP_Recipe_Maker
 * @subpackage WP_Recipe_Maker/includes/admin
 */

/**
 * Helper functions for the recipe import.
 *
 * @since      5.2.0
 * @package    WP_Recipe_Maker
 * @subpackage WP_Recipe_Maker/includes/admin
 * @author     Brecht Vandersmissen <brecht@bootstrapped.ventures>
 */
class WPRM_Import_Helper {

	/**
	 * Cache of images already handled.
	 *
	 * @since	8.4.0
	 * @access  private
	 * @var     array $images Images already handled.
	 */
	private static $images = array();

	/**
	 * Get image attachment ID from a given URL or sideload the image if not on the website.
	 *
	 * @since	5.2.0
	 * @param	int   $post_id Post to associate the image with.
	 * @param	mixed $url Image URL.
	 */
	public static function get_or_upload_attachment( $post_id, $url ) {
		$url = str_replace( array( "\n", "\t", "\r" ), '', $url );

		// Check if already handled and cached.
		if ( array_key_exists( $url, self::$images ) ) {
			return self::$images[ $url ];
		}

		// Not handled yet, try to get attachment ID or upload.
		$image_id = self::get_attachment_id_from_url( $url );

		if ( $image_id ) {
			self::$images[ $url ] = intval( $image_id );
			return intval( $image_id );
		} else {
			if ( ! function_exists( 'media_sideload_image' ) ) {
				require_once( ABSPATH . 'wp-admin/includes/media.php' );
				require_once( ABSPATH . 'wp-admin/includes/file.php' );
				require_once( ABSPATH . 'wp-admin/includes/image.php' );
			}

			$attachment_id = media_sideload_image( $url, $post_id, null, 'id' );

			if ( ! is_wp_error( $attachment_id ) ) {
				self::$images[ $url ] = $attachment_id;
				return $attachment_id;
			}
		}

		return false;
	}

	/**
	 * Get image attachment ID from a given URL.
	 * Source: https://philipnewcomer.net/2012/11/get-the-attachment-id-from-an-image-url-in-wordpress/
	 *
	 * @since	5.2.0
	 * @param	mixed $attachment_url Image URL.
	 */
	public static function get_attachment_id_from_url( $attachment_url = '' ) {
		global $wpdb;
		$attachment_id = false;

		// If there is no url, return.
		if ( '' === $attachment_url ) {
			return;
		}

		// Get the upload directory paths.
		$upload_dir_paths = wp_upload_dir();

		// Make sure the upload path base directory exists in the attachment URL, to verify that we're working with a media library image.
		if ( false !== strpos( $attachment_url, $upload_dir_paths['baseurl'] ) ) {

			// If this is the URL of an auto-generated thumbnail, get the URL of the original image.
			$attachment_url = preg_replace( '/-\d+x\d+(?=\.(jpg|jpeg|png|gif)$)/i', '', $attachment_url );

			// Remove the upload path base directory from the attachment URL.
			$attachment_url = str_replace( $upload_dir_paths['baseurl'] . '/', '', $attachment_url );

			// Finally, run a custom database query to get the attachment ID from the modified attachment URL.
			$attachment_id = $wpdb->get_var( $wpdb->prepare( "SELECT wposts.ID FROM $wpdb->posts wposts, $wpdb->postmeta wpostmeta WHERE wposts.ID = wpostmeta.post_id AND wpostmeta.meta_key = '_wp_attached_file' AND wpostmeta.meta_value = '%s' AND wposts.post_type = 'attachment'", $attachment_url ) ); // @codingStandardsIgnoreLine
		}

		return $attachment_id;
	}

	/**
	 * Check if line is heading.
	 *
	 * @since    6.2.0
	 * @param	 mixed $string String to parse.
	 */
	public static function is_heading( $string ) {
		// Remove any paragraph tags before checking.
		$string = str_ireplace( '<p>', '', $string );
		$string = str_ireplace( '</p>', '', $string );

		// Trim.
		$string = trim( $string );
		// <strong>For The Red Beans</strong>.
		if ( '<strong>' === substr( $string, 0, 8 ) && '</strong>' === substr( $string, -9, 9 ) ) {
			return true;
		}
		// <h3>For The Red Beans</h3>.
		if ( preg_match( '#^<h[1-6]>.+<\/h[1-6]>$#', $string ) ) {
			return true;
		}

		// Strip tags before checking for characters.
		$string = trim( strip_tags( $string ) );
		
		// For The Red Beans:.
		if ( ':' === substr( $string, -1, 1 ) ) {
			return true;
		}
		return false;
	}
}