generate_cart_run.liquid

{%- if flavor contains "vanilla-js" -%}
// @ts-check

import {
  OrderDiscountSelectionStrategy,
  ProductDiscountSelectionStrategy,
} from '../generated/api';

/**
 * @typedef {import("../generated/api").CartInput} CartInput
 * @typedef {import("../generated/api").CartLinesDiscountsGenerateRunResult} CartLinesDiscountsGenerateRunResult
 */

/**
 * generateCartRun
 * @param {CartInput} input - The CartInput
 * @returns {CartLinesDiscountsGenerateRunResult} - The function result with discounts.
 */
export function generateCartRun(input) {
    if (!input.cart.lines.length) {
        throw new Error('No cart lines found');
    }
    const maxCartLine = input.cart.lines.reduce((maxLine, line) => {
        if (line.cost.subtotalAmount > maxLine.cost.subtotalAmount) {
            return line;
        }
        return maxLine;
    }, input.cart.lines[0]);
    return {
        operations: [
            {
                orderDiscountsAdd: {
                    candidates: [
                        {
                            message: '10% OFF ORDER',
                            targets: [
                                {
                                    orderSubtotal: {
                                        excludedCartLineIds: [],
                                    },
                                },
                            ],
                            value: {
                                percentage: {
                                    value: 10,
                                },
                            },
                        },
                    ],
                    selectionStrategy: OrderDiscountSelectionStrategy.First,
                },
            },
            {
                productDiscountsAdd: {
                    candidates: [
                        {
                            message: '20% OFF PRODUCT',
                            targets: [
                                {
                                    cartLine: {
                                        id: maxCartLine.id,
                                    },
                                },
                            ],
                            value: {
                                percentage: {
                                    value: 20,
                                },
                            },
                        },
                    ],
                    selectionStrategy: ProductDiscountSelectionStrategy.First,
                },
            },
        ],
    };
}
{%- elsif flavor contains "typescript" -%}
import {
  OrderDiscountSelectionStrategy,
  ProductDiscountSelectionStrategy,
  CartInput,
  CartLinesDiscountsGenerateRunResult,
} from '../generated/api';

export function generateCartRun(input: CartInput): CartLinesDiscountsGenerateRunResult {
  if (!input.cart.lines.length) {
    throw new Error('No cart lines found');
  }

  const maxCartLine = input.cart.lines.reduce((maxLine, line) => {
    if (line.cost.subtotalAmount > maxLine.cost.subtotalAmount) {
      return line;
    }
    return maxLine;
  }, input.cart.lines[0]);

  return {
    operations: [
      {
        orderDiscountsAdd: {
          candidates: [
            {
              message: '10% OFF ORDER',
              targets: [
                {
                  orderSubtotal: {
                    excludedCartLineIds: [],
                  },
                },
              ],
              value: {
                percentage: {
                  value: 10,
                },
              },
            },
          ],
          selectionStrategy: OrderDiscountSelectionStrategy.First,
        },
      },
      {
        productDiscountsAdd: {
          candidates: [
            {
              message: '20% OFF PRODUCT',
              targets: [
                {
                  cartLine: {
                    id: maxCartLine.id,
                  },
                },
              ],
              value: {
                percentage: {
                  value: 20,
                },
              },
            },
          ],
          selectionStrategy: ProductDiscountSelectionStrategy.First,
        },
      },
    ],
  };
}
{%- endif -%}