【Functions】離島・大型家具・温度帯に応じた配送料の動的計算・条件分岐

use shopify_function::prelude::*;
use shopify_function::Result;

#[shopify_function_target(query_file = "src/run.graphql")]
fn run(input: input::ResponseData) -> Result<output::FunctionResult> {
    let mut operations = Vec::new();
    let is_okinawa = input.cart.delivery_groups
        .iter()
        .any(|group| group.delivery_address.as_ref().map_or(false, |addr| addr.province_code == Some("JP-47".to_string())));

    if is_okinawa {
        // 沖縄県の場合、通常便を非表示にして離島特別便のみを選択肢に残す
        for group in &input.cart.delivery_groups {
            for option in &group.delivery_options {
                if option.title.contains("通常配送") {
                    operations.push(output::Operation::Hide(output::HideOperation {
                        delivery_option_handle: option.handle.clone(),
                    }));
                }
            }
        }
    }

    Ok(output::FunctionResult { operations })
}