@automattic/calypso-products/dist/esm/get-difm-tiered-price-details.js

This module contains information about the various products sold within calypso, such as product slugs, plan intervals, etc.

import { isDIFMProduct } from './is-difm-product';
/**
 * Returns meaningful DIFM purchase details related to tiered difm prices if available
 * Returns null if this is not a DIFM purchase or the proper related price tier information is not available.
 * Returns just the price details if noOfPages is not passed.
 * Returns the price details alongwith calculated values of extraPageCount and extraPagesPrice is noOfPages is passed.
 * @param { Product | any } product  product to get details from
 * @param { number } noOfPages  the number of pages required
 * @returns {Object} with the relevent tier details
 */
export function getDIFMTieredPriceDetails(product, noOfPages) {
    if (!product ||
        !isDIFMProduct(product) ||
        !product.price_tier_list ||
        !Array.isArray(product.price_tier_list) ||
        product.price_tier_list.length === 0) {
        return null;
    }
    const [tier0, tier1] = product.price_tier_list;
    const perExtraPagePrice = tier1.minimum_price - tier0.minimum_price;
    const { maximum_units: numberOfIncludedPages, minimum_price: oneTimeFee, minimum_price_display: formattedOneTimeFee, } = tier0;
    let extraPagesPrice = null;
    let extraPageCount = null;
    if (numberOfIncludedPages && noOfPages) {
        if (noOfPages <= numberOfIncludedPages) {
            return {
                extraPageCount: 0,
                numberOfIncludedPages,
                extraPagesPrice: 0,
                oneTimeFee,
                formattedOneTimeFee,
                perExtraPagePrice,
            };
        }
        extraPageCount = noOfPages - numberOfIncludedPages;
        extraPagesPrice = extraPageCount * perExtraPagePrice;
    }
    return {
        extraPageCount,
        numberOfIncludedPages,
        extraPagesPrice,
        oneTimeFee,
        formattedOneTimeFee,
        perExtraPagePrice,
    };
}
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