Add Orderable time slot and date to a given order ID.

functions.php

<?php
/**
 * Add Orderable time slot and date to a given order ID.
 *
 * @param int    $order_id     The WooCommerce Order ID.
 * @param string $date         The Date (e.g., '2026-02-26').
 * @param string $time         The Time (e.g., '10:00 - 11:00' or '10:00').
 * @param string $service_type The Service Type (e.g., 'delivery' or 'pickup'). Default 'delivery'.
 * @return bool True if successful, false otherwise.
 */
function orderable_add_time_slot_to_order( $order_id, $date, $time, $service_type = 'delivery' ) {
    $order = wc_get_order( $order_id );
    
    if ( ! $order ) {
        return false;
    }

    // Save display metas
    $order->update_meta_data( 'orderable_order_date', sanitize_text_field( $date ) );
    $order->update_meta_data( 'orderable_order_time', sanitize_text_field( $time ) );

    // Build properly timezoned DateTime
    $date_and_time = new DateTime( 'now', wp_timezone() );
    
    // Attempt to parse the date first
    $date_parts = explode( '-', $date );
    if ( count( $date_parts ) === 3 ) {
        $date_and_time->setDate( (int) $date_parts[0], (int) $date_parts[1], (int) $date_parts[2] );
    } else {
        $timestamp_fallback = strtotime( $date );
        if ( $timestamp_fallback ) {
            $date_and_time->setTimestamp( $timestamp_fallback );
        }
    }
    
    // Set time to midnight by default
    $date_and_time->setTime( 0, 0, 0 );
    
    // If a specific time is provided (and it isn't "asap", try to extract HH:MM)
    if ( ! empty( $time ) && 'asap' !== strtolower( $time ) ) {
        $time_parts = explode( '-', $time );
        $start_time = trim( $time_parts[0] );
        
        $hours = 0;
        $minutes = 0;

        if ( strpos( $start_time, ':' ) !== false ) {
            $split = explode( ':', $start_time, 2 );
            $hours = (int) $split[0];
            $minutes = (int) $split[1];
        } else {
            // Handle cases where time might be just "9" or "900" without a colon (less likely but safe fallback)
            $start_time = str_pad( $start_time, 4, '0', STR_PAD_LEFT );
            $hours = (int) substr( $start_time, 0, 2 );
            $minutes = (int) substr( $start_time, 2, 2 );
        }
        
        $date_and_time->setTime( $hours, $minutes, 0 );
    }

    $timestamp = $date_and_time->getTimestamp();
    
    if ( $timestamp ) {
        // Save hidden capacity tracking metas
        $order->update_meta_data( '_orderable_order_timestamp', $timestamp );
        $order->update_meta_data( '_orderable_service_type', strtolower( $service_type ) );
    }

    // remove_action( 'woocommerce_before_order_object_save', array( 'Orderable_Services_Order', 'before_save_order' ), 10 );

    $order->save();
    
    return true;
}


// remove this code snippet after the order is updated
add_action( 'init', function() {
    orderable_add_time_slot_to_order(179, '2026-02-26', '10:40', 'delivery');
} );