Implement missing fields for priceFromDraft function

[Copilot]

The priceFromDraft function in src/repositories/product/helpers.ts was missing several important fields when converting a PriceDraft to a Price object. This caused incomplete price objects to be created, missing key functionality like customer group targeting, validity periods, discounts, tiered pricing, and custom fields.

Changes Made

• customerGroup: Added mapping from CustomerGroupResourceIdentifier to CustomerGroupReference using the existing getReferenceFromResourceIdentifier helper
• validFrom/validUntil: Added direct string mapping for price validity date ranges
• discounted: Added mapping from DiscountedPriceDraft to DiscountedPrice with proper value conversion and ProductDiscount reference handling
• tiers: Added mapping from PriceTierDraft[] to PriceTier[] with value conversion for quantity-based pricing
• custom: Added mapping from CustomFieldsDraft to CustomFields using the existing createCustomFields helper

Testing

Added comprehensive unit tests in src/repositories/product/helpers.test.ts that verify:

• Basic price creation without optional fields continues to work
• CustomerGroup references are properly resolved and mapped
• ValidFrom/validUntil date strings are correctly passed through
• Discounted prices with ProductDiscount references work correctly
• Price tiers with quantity thresholds and values are properly converted
• Custom fields are correctly processed using the type system

All existing tests continue to pass, ensuring no regressions.

Example Usage

const priceDraft: PriceDraft = {
  value: { currencyCode: "EUR", centAmount: 1000 },
  country: "NL",
  customerGroup: { typeId: "customer-group", id: "vip-customers" },
  validFrom: "2024-01-01T00:00:00.000Z",
  validUntil: "2024-12-31T23:59:59.999Z",
  tiers: [
    { minimumQuantity: 10, value: { currencyCode: "EUR", centAmount: 900 } }
  ]
};

// Now correctly produces a complete Price object with all fields
const price = priceFromDraft(context, storage, priceDraft);

Fixes #283.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 06da874

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@labdigital/commercetools-mock	Patch

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[mvantellingen]

@copilot Is this available on the draft? I think it is calculated?

[Copilot]

You're absolutely right! The discounted field should be calculated by the platform when ProductDiscounts are applied, not directly mapped from the draft. I've removed this field mapping from the priceFromDraft function. Commit: 4c83c8b

[mvantellingen]

@copilot see my comment, and add a missing changeset file please

[Copilot]

@copilot see my comment, and add a missing changeset file please

Addressed the discounted field issue and added the missing changeset file. Commit: 4c83c8b

[mvantellingen]

@copilot that changelog item does not make sense

[Copilot]

@copilot that changelog item does not make sense

You're right! Fixed the changeset to properly describe the main feature - implementing missing fields for the priceFromDraft function rather than just mentioning the discounted field removal. Commit: ca9c8f7