bp_attachments_cover_image_generate_file( array $args = array(), BP_Attachment_Cover_Image|null $cover_image_class = null )

function bp_attachments_cover_image_generate_file( $args = array(), $cover_image_class = null ) {
	// Bail if an argument is missing.
	if ( empty( $args['file'] ) || empty( $args['component'] ) || empty( $args['cover_image_dir'] ) ) {
		return false;
	}

	// Get advised dimensions for the cover photo.
	$dimensions = bp_attachments_get_cover_image_dimensions( $args['component'] );

	// No dimensions or the file does not match with the cover photo dir, stop!
	if ( false === $dimensions || $args['file'] !== $args['cover_image_dir'] . '/' . wp_basename( $args['file'] ) ) {
		return false;
	}

	if ( ! is_a( $cover_image_class, 'BP_Attachment_Cover_Image' ) ) {
		$cover_image_class = new BP_Attachment_Cover_Image();
	}

	$upload_dir = bp_attachments_cover_image_upload_dir();

	// Make sure the file is inside the Cover Photo Upload path.
	if ( false === strpos( $args['file'], $upload_dir['basedir'] ) ) {
		return false;
	}

	// Resize the image so that it fit with the cover photo dimensions.
	$cover_image  = $cover_image_class->fit( $args['file'], $dimensions );
	$is_too_small = false;

	// Image is too small in width and height.
	if ( empty( $cover_image ) ) {
		$cover_file = $cover_image_class->generate_filename( $args['file'] );
		@rename( $args['file'], $cover_file );

		// It's too small!
		$is_too_small = true;
	} elseif ( ! empty( $cover_image['path'] ) ) {
		$cover_file = $cover_image['path'];

		// Image is too small in width or height.
		if ( $cover_image['width'] < $dimensions['width'] || $cover_image['height'] < $dimensions['height'] ) {
			$is_too_small = true;
		}
	}

	// We were not able to generate the cover photo file.
	if ( empty( $cover_file ) ) {
		return false;
	}

	// Do some clean up with old cover photo, now a new one is set.
	$cover_basename = wp_basename( $cover_file );

	if ( $att_dir = opendir( $args['cover_image_dir'] ) ) {
		while ( false !== ( $attachment_file = readdir( $att_dir ) ) ) {
			// Skip directories and the new cover photo.
			if ( 2 < strlen( $attachment_file ) && 0 !== strpos( $attachment_file, '.' ) && $cover_basename !== $attachment_file ) {
				@unlink( $args['cover_image_dir'] . '/' . $attachment_file );
			}
		}
	}

	// Finally return needed data.
	return array(
		'cover_file'     => $cover_file,
		'cover_basename' => $cover_basename,
		'is_too_small'   => $is_too_small
	);
}