path: root/includes/admin/views/giglog_import_gigs.php

<?php

// SPDX-FileCopyrightText: 2021 Andrea Chirulescu <andrea.chirulescu@gmail.com>
// SPDX-FileCopyrightText: 2021 Harald Eilertsen <haraldei@anduin.net>
//
// SPDX-License-Identifier: AGPL-3.0-or-later

if ( ! class_exists( 'GiglogAdmin_ImportGigsPage' ) ) {
    require_once __DIR__ . '/../../class-giglogadmin-concert.php';
    require_once __DIR__ . '/../../class-giglogadmin-venue.php';

    class GiglogAdmin_ImportGigsPage {
        static function render_html(): void {
            ?>
            <div class="wrap">
                <h1>Import gigs</h1>
                <p>Import gig data from a tab separated data file.</p>
                <form action="<?php menu_page_url( 'giglog_import' ); ?>" enctype="multipart/form-data" method="post">
                    <?php wp_nonce_field( plugin_basename( __FILE__ ), 'giglog_import_nonce' ); ?>
                    <label for="giglog_import_file">File: </label>
                    <input type="file" name="giglog_import_file" id="giglog_import_file">
                    <?php submit_button(); ?>
                </form>
            </div>
            <?php
        }

        static function submit_form(): void {
            if ( 'POST' === $_SERVER['REQUEST_METHOD'] && current_user_can( 'upload_files' ) && ! empty( $_FILES['giglog_import_file']['tmp_name'] ) ) {
                if ( isset( $_POST['giglog_import_nonce'] ) && wp_verify_nonce( $_POST['giglog_import_nonce'], plugin_basename( __FILE__ ) ) ) {
                    self::process_upload( $_FILES['giglog_import_file'] );
                } else {
                    header( "{$_SERVER['SERVER_PROTOCOL']} 403 Forbidden" );
                    wp_die( 'CSRF validation failed.', 403 );
                }
            }
        }

        /**
         * Imports concert data from a file with tab separated values.
         *
         * The file must contain the following columns each separated by _one_
         * tab character:
         *
         *   1. Concertname
         *   2. Venuename or numeric venue id
         *   3. Concert date
         *   4. Ticket link
         *   5. Event info link
         *
         * Empty lines are ignored.
         *
         * @return void
         *
         * @param array<int, mixed> $file
         */
        static function process_upload( array $file ): void {
            $fo = new SplFileObject( $file['tmp_name'] );
            $importerrors = array();
            $rid = 0;

            foreach ( $fo as $line ) {
                $rid++;
                $line = trim( $line );
                if ( ! empty( $line ) ) {
                    try {
                        self::process_line( $line );
                    } catch ( Exception $e ) {
                        $importerrors[] = "Error importing line {$rid}: {$e->getMessage()}";
                    }
                }
            }

            if ( ! empty( $importerrors ) ) {
                echo implode( '<br>', $importerrors );
            } else {
                echo ( 'All rows imported ok' );
            }
        }

        static function process_line( string $line ) : void {
            $resultArray = explode( "\t", $line );

            // unsure if this is needed, considering we are also checking if
            // each individual important field is missing. But if they are not
            // replaced by tabs, then everything gets shifted so probably best
            // to check if a value is empty and NOT replaced by tab

            if ( count( $resultArray ) < 6 ) {
                throw new Exception( 'missing a field' );
            }

            if ( ! preg_match( '/\d{4}\-\d{2}-\d{2}/', $resultArray[3] ) ) {
                throw new Exception( 'invalid date: ' . esc_html( $resultArray[3] ) );
            }

            if ( empty( trim( $resultArray[0] ) ) ) {
                throw new Exception( 'missing concert name' );
            }

            if ( empty( trim( $resultArray[1] ) ) ) {
                throw new Exception( 'missing venue' );
            }

            if ( empty( trim( $resultArray[2] ) ) ) {
                throw new Exception( 'missing city' );
            }

            $condate = date( 'Y-m-d', strtotime( $resultArray[3] ) );

            if ( $condate < date( 'Y-m-d' ) ) {
                throw new Exception( 'has date in the past: ' . esc_html( $resultArray[3] ) );
            }

            $cname       = trim( $resultArray[0] );
            $venue       = trim( $resultArray[1] );

            if ( is_numeric( $venue ) ) {
                $venue = GiglogAdmin_Venue::get( intval( $venue ) );
                if ( ! $venue ) {
                    throw new Exception( "invalid venue id: {$venue}" );
                }
            } else {
                $venue = GiglogAdmin_Venue::find_or_create( $venue, trim( $resultArray[2] ) );
            }

            $ticketlink  = trim( $resultArray[4] );
            $eventlink   = trim( $resultArray[5] );

            GiglogAdmin_Concert::create( $cname, $venue->id(), $condate, $ticketlink, $eventlink );
        }
    }
}