Shopify Scripts 与 Functions 迁移

# 1. 用 Shopify CLI 创建 Function
shopify app generate extension --type product_discount
 
# 2. 在生成的 src/ 目录编写逻辑
# (Rust 推荐，性能最优；TypeScript 易上手)
 
# 3. 本地测试
shopify app dev
 
# 4. 部署
shopify app deploy

my-discount-function/
├── shopify.function.toml      # 配置
├── input.graphql              # 定义输入数据
├── src/
│   └── main.rs                # 核心逻辑
├── Cargo.toml                 # Rust 依赖
└── README.md

# Line Item Script
if Input.cart.line_items.size >= 3
  Input.cart.line_items.each do |line_item|
    line_item.change_line_price(
      line_item.line_price * 0.9,
      message: "满 3 件 9 折"
    )
  end
end
Output.cart = Input.cart

use shopify_function::prelude::*;
 
#[shopify_function]
fn function(input: schema::FunctionRunInput) -> Result<schema::FunctionRunResult> {
    let total_quantity: i32 = input
        .cart
        .lines
        .iter()
        .map(|line| line.quantity)
        .sum();
 
    if total_quantity < 3 {
        return Ok(schema::FunctionRunResult { discounts: vec![] });
    }
 
    let targets = input
        .cart
        .lines
        .iter()
        .map(|line| schema::Target {
            cart_line: Some(schema::CartLineTarget {
                id: line.id.clone(),
                quantity: None,
            }),
            ..Default::default()
        })
        .collect();
 
    Ok(schema::FunctionRunResult {
        discounts: vec![schema::Discount {
            message: Some("满 3 件 9 折".to_string()),
            value: schema::Value::Percentage(schema::Percentage { value: dec!(10) }),
            targets,
            conditions: None,
        }],
    })
}

if Input.cart.customer && Input.cart.customer.tags.include?("VIP")
  Input.shipping_rates.each do |rate|
    rate.apply_discount(rate.price, message: "VIP 免运费")
  end
end
Output.shipping_rates = Input.shipping_rates

export function run(input) {
  const isVIP = input.cart.buyerIdentity?.customer?.hasAnyTag === true;
 
  if (!isVIP) {
    return { operations: [] };
  }
 
  return {
    operations: input.cart.deliveryGroups.flatMap(group =>
      group.deliveryOptions.map(option => ({
        rename: {
          deliveryOptionHandle: option.handle,
          title: `免费配送（VIP 福利）`
        }
      }))
    )
  };
}

if Input.cart.subtotal_price > Money.new(cents: 50000)
  Output.payment_gateways = Input.payment_gateways.reject do |gateway|
    gateway.name.downcase.include?("cash on delivery")
  end
end

export function run(input) {
  const subtotalCents = parseFloat(input.cart.cost.subtotalAmount.amount) * 100;
 
  if (subtotalCents <= 50000) {
    return { operations: [] };
  }
 
  const codPaymentMethod = input.paymentMethods.find(pm =>
    pm.name.toLowerCase().includes('cash on delivery')
  );
 
  if (!codPaymentMethod) {
    return { operations: [] };
  }
 
  return {
    operations: [{
      hide: { paymentMethodId: codPaymentMethod.id }
    }]
  };
}

触发：Order Created
条件：Order.totalPriceSet > $500
动作：Send Slack message to #vip-orders

触发：Customer's order count changes
条件：Customer.totalSpent > $1000
动作：Tag customer with "vip"

触发：Inventory level changes
条件：Variant.inventoryQuantity < 10
动作：Send email to ops@yourstore.com

触发：Order risk analysis
条件：Order.riskLevel = "high"
动作：
  - Cancel order
  - Refund payment
  - Tag customer "high-risk"