File attachment.php

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<?php

namespace SIW;

use SIW\Properties;

/**
 * Class om attachment aan te maken o.b.v. een (tijdelijk) bestand
 * 
 * @copyright   2019 SIW Internationale Vrijwilligersprojecten
 * @since       3.0.0
 * 
 * @todo        subclasses voor bestandstypes?
 */
class Attachment {

    /**
     * Path van upload directory
     *
     * @var string
     */
    protected $upload_dir;

    /**
     * URL van upload directory
     *
     * @var string
     */
    protected $upload_url;

    /**
     * Subdirectory voor upload
     *
     * @var string
     */
    protected $subdir;

    /**
     * Minimum breedte van afbeelding
     *
     * @var int
     */
    protected $minimum_width;

    /**
     * Minimum hoogte van afbeelding
     *
     * @var int
     */
    protected $minimum_height;

    /**
     * Maximum breedte van afbeelding
     *
     * @var int
     */
    protected $maximum_width = Properties::MAX_IMAGE_SIZE;

    /**
     * Maximum hoogte van afbeelding
     *
     * @var int
     */
    protected $maximum_height = Properties::MAX_IMAGE_SIZE;

    /**
     * Soort bestand
     *
     * @var string
     */
    protected $filetype;

    /**
     * Init
     *
     * @param string $filetype
     * @param string $subdir
     */
    public function __construct( string $filetype, string $subdir ) {
        
        $this->filetype = $filetype;

        //Bepaal standaard upload dir
        $upload_dir = wp_upload_dir( null, false );
        $this->upload_dir = $upload_dir['basedir'];
        $this->upload_url = $upload_dir['baseurl'];

        //Zet subdirectory voor upload
        $this->subdir = $subdir;
        add_filter( 'siw_upload_subdir', [ $this, 'set_upload_subdir'] );
    }

    /**
     * Voegt attachment toe
     *
     * @param string $temp_file
     * @param string $filename
     * @param string $title
     *
     * @return int
     */
    public function add( $temp_file, $filename, $title ) {

        //Verplaats bestand naar upload-directory
        $relative_path = $this->move_file( $temp_file, $filename );
        if ( null === $relative_path ) {
            return false;
        }

        //Afbeelding controleren op minimale en maximale afmetingen
        if ( 'image' == $this->filetype ) {
            $relative_path = $this->check_image( $relative_path );
            if ( false === $relative_path ) {
                return false;
            }
        }
        return $this->create_attachment( $relative_path, $title );
    }

    /**
     * Verplaatst bestand naar upload-directory
     *
     * @param string $temp_file
     * @param string $filename
     *
     * @return string
     */
    protected function move_file( string $temp_file, string $filename ) {
        
        $temp_filename = basename( $temp_file );

        //Controleren bestand
        $check = wp_check_filetype_and_ext( $temp_file, $temp_filename );
        if ( false == $check['type'] || ( null !== $this->filetype && $this->filetype !== wp_ext2type( $check['ext'] ) ) ) {
            wp_delete_file( $temp_file );
            return null;
        }

        //Genereer bestandsnaam
        $filename .= ".{$check['ext']}";
        $filename = wp_unique_filename( "{$this->upload_dir}/{$this->subdir}", $filename );


        //Bestand verplaatsen naar upload directory
        $file = [
            'name'     => $filename,
            'type'     => $check['type'],
            'tmp_name' => $temp_file,
            'error'    => 0,
            'size'     => filesize( $temp_file ),
        ];
        $overrides = [
            'test_form' => false,
        ];
        $file_attributes = wp_handle_sideload( $file, $overrides );
        return _wp_relative_upload_path( $file_attributes['file'] );
    }

    /**
     * Zet minimum resolutie van afbeelding
     *
     * @param int $width
     * @param int $height
     */
    public function set_minimum_resolution( int $width, int $height) {
        $this->minimum_width = $width;
        $this->minimum_height = $height;
    }

    /**
     * Zet maximum resolutie van afbeelding
     *
     * @param int $width
     * @param int $height
     */
    public function set_maximimum_resolution( int $width, int $height) {
        $this->maximum_width = abs( $width );
        $this->maximum_height = abs( $height );
    }

    /**
     * Voegt attachment toe aan database
     *
     * @param string $relative_path
     * @return int
     */
    protected function create_attachment( string $relative_path, string $title ) {
        $file = wp_normalize_path( $this->upload_dir . '/' . $relative_path );

        $attachment_id = wp_insert_attachment( [
            'guid'           => $this->upload_url . '/' . $relative_path, 
            'post_mime_type' => wp_check_filetype( $file )['type'],
            'post_title'     => $title,
            'post_content'   => '',
            'post_status'    => 'inherit'
        ], $relative_path );

        if ( is_wp_error( $attachment_id ) ) {
            return false;
        }

        require_once( ABSPATH . 'wp-admin/includes/image.php' );

        wp_update_attachment_metadata(
            $attachment_id,
            wp_generate_attachment_metadata( $attachment_id, $file )
        );
        return $attachment_id;
    }

    /**
     * Controleer afbeelding
     * 
     * - Verwijderen en afbreken als afbeelding te klein is
     * - Resizen als afbeelding te groot is
     *
     * @param string $relative_path
     *
     * @return string|bool
     */
    protected function check_image( string $relative_path ) {
        $file = wp_normalize_path( $this->upload_dir . '/' . $relative_path );

        $image_editor = wp_get_image_editor( $file );
        if ( is_wp_error( $image_editor ) ) {
            return $relative_path;
        }

        //Bepaal afmetingen van afbeelding
        $dimensions = $image_editor->get_size();

        //Afbeelding weggooien en afbreken als deze te klein is
        if ( ( isset( $this->minimum_width ) && $dimensions['width'] < $this->minimum_width ) || ( isset( $this->minimum_height ) && $dimensions['height'] < $this->minimum_height ) ) {
            wp_delete_file( $file );
            return false;
        }
    
        //Resizen als afbeelding te groot is
        if ( $dimensions['width'] > $this->maximum_width || $dimensions['height'] > $this->maximum_height ) {
            $resize = $image_editor->resize( $this->maximum_width, $this->maximum_height, true );
            if ( is_wp_error( $resize ) ) {
                wp_delete_file( $file );
                return false;
            }
            $resized_image = $image_editor->save( $file );
            if ( is_wp_error( $resized_image ) ) {
                return false;
            }

            $path = $resized_image['path'];
            if ( 0 === strpos( $path, $this->upload_dir ) ) {
                $relative_path = str_replace( $this->upload_dir, '', $path );
                $relative_path = ltrim( $relative_path, '/' );
            }
            return $relative_path;
        }
        return $relative_path;
    }

    /**
     * Zet upload directory
     *
     * @return string
     */
    public function set_upload_subdir() {
        return $this->subdir;
    }
}

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