/// <summary>
/// Gets a <see cref="IEnumerable{CultureInfo}"/> containing <see cref="CultureInfo"/> instances from provided <code>requiredTranslations</code>
/// which translations are not found in the provided <see cref="MarketDescriptionCacheItem"/>
/// </summary>
/// <param name="item">The <see cref="MarketDescriptionCacheItem"/> instance, or a null reference</param>
/// <param name="requiredTranslations">The <see cref="IEnumerable{CultureInfo}"/> specifying the required languages</param>
/// <returns>A <see cref="IEnumerable{CultureInfo}"/> containing missing translations or a null reference if none of the translations are missing</returns>
private static IEnumerable <CultureInfo> GetMissingTranslations(MarketDescriptionCacheItem item, IEnumerable <CultureInfo> requiredTranslations)
{
Guard.Argument(requiredTranslations, nameof(requiredTranslations)).NotNull().NotEmpty();
if (item == null)
{
return(requiredTranslations);
}
var missingCultures = requiredTranslations.Where(c => !item.HasTranslationsFor(c)).ToList();
return(missingCultures.Any()
? missingCultures
: null);
}
/// <summary>
/// Gets a <see cref="IEnumerable{CultureInfo}"/> containing <see cref="CultureInfo"/> instances from provided <code>requiredTranslations</code>
/// which translations are not found in the provided <see cref="MarketDescriptionCacheItem"/>
/// </summary>
/// <param name="item">The <see cref="MarketDescriptionCacheItem"/> instance, or a null reference</param>
/// <param name="requiredTranslations">The <see cref="IEnumerable{CultureInfo}"/> specifying the required languages</param>
/// <returns>A <see cref="IEnumerable{CultureInfo}"/> containing missing translations or a null reference if none of the translations are missing</returns>
private static IEnumerable <CultureInfo> GetMissingTranslations(MarketDescriptionCacheItem item, IEnumerable <CultureInfo> requiredTranslations)
{
Contract.Requires(requiredTranslations != null && requiredTranslations.Any());
if (item == null)
{
return(requiredTranslations);
}
var missingCultures = requiredTranslations.Where(c => !item.HasTranslationsFor(c)).ToList();
return(missingCultures.Any()
? missingCultures
: null);
}