<?php
defined( 'ABSPATH' ) || die( 'Cheatin’ uh?' );

/**
 * Get all mime types which could be optimized by Imagify.
 *
 * @since 1.7
 * @since 1.8 Added $type parameter.
 *
 * @param  string $type One of 'image', 'not-image'. Any other value will return all mime types.
 * @return array        The mime types.
 */
function imagify_get_mime_types( $type = null ) {
	$mimes = [];

	if ( 'not-image' !== $type ) {
		$mimes = [
			'jpg|jpeg|jpe' => 'image/jpeg',
			'png'          => 'image/png',
			'gif'          => 'image/gif',
			'webp'         => 'image/webp',
		];
	}

	if ( 'image' !== $type ) {
		$mimes['pdf'] = 'application/pdf';
	}

	return $mimes;
}

/**
 * Tell if an attachment has a supported mime type.
 * Was previously Imagify_AS3CF::is_mime_type_supported() since 1.6.6.
 *
 * @since  1.6.8
 * @author Grégory Viguier
 *
 * @param  int $attachment_id The attachment ID.
 * @return bool
 */
function imagify_is_attachment_mime_type_supported( $attachment_id ) {
	static $is = array( false );

	$attachment_id = absint( $attachment_id );

	if ( isset( $is[ $attachment_id ] ) ) {
		return $is[ $attachment_id ];
	}

	$mime_types = imagify_get_mime_types();
	$mime_types = array_flip( $mime_types );
	$mime_type  = (string) get_post_mime_type( $attachment_id );

	$is[ $attachment_id ] = isset( $mime_types[ $mime_type ] );

	return $is[ $attachment_id ];
}

/**
 * Get post statuses related to attachments.
 *
 * @since  1.7
 * @author Grégory Viguier
 *
 * @return array
 */
function imagify_get_post_statuses() {
	static $statuses;

	if ( isset( $statuses ) ) {
		return $statuses;
	}

	$statuses = array(
		'inherit' => 'inherit',
		'private' => 'private',
	);

	$custom_statuses = get_post_stati( array( 'public' => true ) );
	unset( $custom_statuses['publish'] );

	if ( $custom_statuses ) {
		$statuses = array_merge( $statuses, $custom_statuses );
	}

	/**
	 * Filter the post statuses Imagify is allowed to optimize.
	 *
	 * @since  1.7
	 * @author Grégory Viguier
	 *
	 * @param array $statuses An array of post statuses. Kays and values are set.
	 */
	$statuses = apply_filters( 'imagify_post_statuses', $statuses );

	return $statuses;
}

/**
 * Tell if the site has attachments (only the ones Imagify would optimize) without the required WP metadata.
 *
 * @since  1.7
 * @author Grégory Viguier
 *
 * @return bool
 */
function imagify_has_attachments_without_required_metadata() {
	global $wpdb;
	static $has;

	if ( isset( $has ) ) {
		return $has;
	}

	$mime_types   = Imagify_DB::get_mime_types();
	$statuses     = Imagify_DB::get_post_statuses();
	$nodata_join  = Imagify_DB::get_required_wp_metadata_join_clause(
		'p.ID',
		false,
		false,
		"AND p.post_mime_type IN ( $mime_types )
			AND p.post_type = 'attachment'
			AND p.post_status IN ( $statuses )"
	);
	$nodata_where = Imagify_DB::get_required_wp_metadata_where_clause( array(
		'matching' => false,
		'test'     => false,
	) );
	$has          = (bool) $wpdb->get_var( // WPCS: unprepared SQL ok.
		"
		SELECT p.ID
		FROM $wpdb->posts AS p
			$nodata_join
		WHERE p.post_mime_type IN ( $mime_types )
			AND p.post_type = 'attachment'
			AND p.post_status IN ( $statuses )
			$nodata_where
		LIMIT 1"
	);

	return $has;
}

/**
 * Get the path to the backups directory.
 *
 * @since  1.6.8
 * @author Grégory Viguier
 *
 * @param  bool $bypass_error True to return the path even if there is an error. This is used when we want to display this path in a message for example.
 * @return string|bool        Path to the backups directory. False on failure.
 */
function get_imagify_backup_dir_path( $bypass_error = false ) {
	static $backup_dir;

	if ( isset( $backup_dir ) ) {
		return $backup_dir;
	}

	$upload_basedir = get_imagify_upload_basedir( $bypass_error );

	if ( ! $upload_basedir ) {
		return false;
	}

	$backup_dir = $upload_basedir . 'backup/';

	/**
	 * Filter the backup directory path.
	 *
	 * @since 1.0
	 *
	 * @param string $backup_dir The backup directory path.
	*/
	$backup_dir = apply_filters( 'imagify_backup_directory', $backup_dir );
	$backup_dir = imagify_get_filesystem()->normalize_dir_path( $backup_dir );

	return $backup_dir;
}

/**
 * Tell if the folder containing the backups is writable.
 *
 * @since  1.6.8
 * @author Grégory Viguier
 *
 * @return bool
 */
function imagify_backup_dir_is_writable() {
	return imagify_get_filesystem()->make_dir( get_imagify_backup_dir_path() );
}

/**
 * Get the backup path of a specific attachement.
 *
 * @since 1.0
 *
 * @param  string $file_path The file path.
 * @return string|bool       The backup path. False on failure.
 */
function get_imagify_attachment_backup_path( $file_path ) {
	$file_path      = wp_normalize_path( (string) $file_path );
	$upload_basedir = get_imagify_upload_basedir();
	$backup_dir     = get_imagify_backup_dir_path();

	if ( ! $file_path || ! $upload_basedir ) {
		return false;
	}

	return preg_replace( '@^' . preg_quote( $upload_basedir, '@' ) . '@', $backup_dir, $file_path );
}

/**
 * Retrieve file path for an attachment based on filename.
 *
 * @since 1.4.5
 *
 * @param  int $file_path The file path.
 * @return string|false   The file path to where the attached file should be, false otherwise.
 */
function get_imagify_attached_file( $file_path ) {
	$file_path      = wp_normalize_path( (string) $file_path );
	$upload_basedir = get_imagify_upload_basedir();

	if ( ! $file_path || ! $upload_basedir ) {
		return false;
	}

	// The file path is absolute.
	if ( strpos( $file_path, '/' ) === 0 || preg_match( '|^.:\\\|', $file_path ) ) {
		return false;
	}

	// Prepend upload dir.
	return $upload_basedir . $file_path;
}

/**
 * Retrieve the URL for an attachment based on file path.
 *
 * @since 1.4.5
 *
 * @param  string $file_path A relative or absolute file path.
 * @return string|bool       File URL, otherwise false.
 */
function get_imagify_attachment_url( $file_path ) {
	$file_path      = wp_normalize_path( (string) $file_path );
	$upload_basedir = get_imagify_upload_basedir();

	if ( ! $file_path || ! $upload_basedir ) {
		return false;
	}

	$upload_baseurl = get_imagify_upload_baseurl();

	// Check that the upload base exists in the (absolute) file location.
	if ( 0 === strpos( $file_path, $upload_basedir ) ) {
		// Replace file location with url location.
		return preg_replace( '@^' . preg_quote( $upload_basedir, '@' ) . '@', $upload_baseurl, $file_path );
	}

	if ( false !== strpos( '/' . $file_path, '/wp-content/uploads/' ) ) {
		// Get the directory name relative to the basedir (back compat for pre-2.7 uploads).
		return trailingslashit( $upload_baseurl . _wp_get_attachment_relative_path( $file_path ) ) . imagify_get_filesystem()->file_name( $file_path );
	}

	// It's a newly-uploaded file, therefore $file is relative to the basedir.
	return $upload_baseurl . $file_path;
}

/**
 * Get size information for all currently registered thumbnail sizes.
 *
 * @since  1.5.10
 * @since  1.6.10 For consistency, revamped the function like WP does with wp_generate_attachment_metadata().
 *                Removed the filter, added crop value to each size.
 * @author Grégory Viguier
 *
 * @return array {
 *     Data for the currently registered thumbnail sizes.
 *     Size names are used as array keys.
 *
 *     @type int    $width  The image width.
 *     @type int    $height The image height.
 *     @type bool   $crop   True to crop, false to resize.
 *     @type string $name   The size name.
 * }
 */
function get_imagify_thumbnail_sizes() {
	// All image size names.
	$intermediate_image_sizes = get_intermediate_image_sizes();
	$intermediate_image_sizes = array_flip( $intermediate_image_sizes );
	// Additional image size attributes.
	$additional_image_sizes   = wp_get_additional_image_sizes();

	// Create the full array with sizes and crop info.
	foreach ( $intermediate_image_sizes as $size_name => $s ) {
		$intermediate_image_sizes[ $size_name ] = array(
			'width'  => '',
			'height' => '',
			'crop'   => false,
			'name'   => $size_name,
		);

		if ( isset( $additional_image_sizes[ $size_name ]['width'] ) ) {
			// For theme-added sizes.
			$intermediate_image_sizes[ $size_name ]['width'] = (int) $additional_image_sizes[ $size_name ]['width'];
		} else {
			// For default sizes set in options.
			$intermediate_image_sizes[ $size_name ]['width'] = (int) get_option( "{$size_name}_size_w" );
		}

		if ( isset( $additional_image_sizes[ $size_name ]['height'] ) ) {
			// For theme-added sizes.
			$intermediate_image_sizes[ $size_name ]['height'] = (int) $additional_image_sizes[ $size_name ]['height'];
		} else {
			// For default sizes set in options.
			$intermediate_image_sizes[ $size_name ]['height'] = (int) get_option( "{$size_name}_size_h" );
		}

		if ( isset( $additional_image_sizes[ $size_name ]['crop'] ) ) {
			// For theme-added sizes.
			$intermediate_image_sizes[ $size_name ]['crop'] = (int) $additional_image_sizes[ $size_name ]['crop'];
		} else {
			// For default sizes set in options.
			$intermediate_image_sizes[ $size_name ]['crop'] = (int) get_option( "{$size_name}_crop" );
		}
	}

	return $intermediate_image_sizes;
}

/**
 * A simple helper to get the upload basedir.
 *
 * @since  1.6.7
 * @since  1.6.8 Added the $bypass_error parameter.
 * @author Grégory Viguier
 *
 * @param  bool $bypass_error True to return the path even if there is an error. This is used when we want to display this path in a message for example.
 * @return string|bool        The path. False on failure.
 */
function get_imagify_upload_basedir( $bypass_error = false ) {
	return imagify_get_filesystem()->get_upload_basedir( $bypass_error );
}

/**
 * A simple helper to get the upload baseurl.
 *
 * @since  1.6.7
 * @author Grégory Viguier
 *
 * @return string|bool The URL. False on failure.
 */
function get_imagify_upload_baseurl() {
	return imagify_get_filesystem()->get_upload_baseurl();
}

/**
 * Get the maximal number of unoptimized attachments to fetch.
 *
 * @since  1.6.14
 * @author Grégory Viguier
 *
 * @return int
 */
function imagify_get_unoptimized_attachment_limit() {
	/**
	 * Filter the unoptimized attachments limit query.
	 *
	 * @since 1.4.4
	 *
	 * @param int $limit The limit (-1 for unlimited).
	 */
	$limit = (int) apply_filters( 'imagify_unoptimized_attachment_limit', 10000 );

	return -1 === $limit ? PHP_INT_MAX : abs( $limit );
}
