Function checkCompleteProductFields

checkCompleteProductFields(product: unknown): string[]

Checks a product object for missing or incorrectly typed complete required fields. Returns an array of field names that are missing or have the wrong type.

Parameters

product: unknown
The product object to validate

Returns string[]

Array of missing or invalid field names (empty if all fields are valid)

Throws

TypeError if product is null or not an object

Example

const product = { title: "NaCl", price: 29.99, quantity: 500, uom: "g" };
const missing = checkCompleteProductFields(product);
// ["supplier", "url", "currencyCode", "currencySymbol"]

Source

export function checkCompleteProductFields(product: unknown): string[] {
  if (!product || typeof product !== 'object') {
    throw new TypeError('checkCompleteProductFields| Invalid product', { cause: product });
  }

  const requiredProps: Record<keyof RequiredProductFields, string> = {
    title: 'string',
    price: 'number',
    quantity: 'number',
    uom: 'string',
    supplier: 'string',
    url: 'string',
    currencyCode: 'string',
    currencySymbol: 'string',
  };

  // Safe: the guard above already verified product is a non-null object.
  const record = product as Record<string, unknown>;
  const result = Object.entries(requiredProps).reduce(
    (acc: string[], [key, expectedType]: [string, string]) => {
      if (key in record === false) {
        console.debug('checkCompleteProductFields| No value found in product', { product, key });
        return [...acc, key];
      }

      if (typeof record[key] !== expectedType) {
        console.debug('checkCompleteProductFields| Property not the correct type', {
          product,
          key,
          expectedType,
          actualType: typeof record[key],
        });
        return [...acc, key];
      }

      return acc;
    },
    [],
  );
  if (result.length > 0) {
    console.warn('checkCompleteProductFields| Results for product is', { product, result });
  }
  return result;
}