/// <summary>
/// Merges the weather data collections.
/// </summary>
/// <param name="currentDataCollection">The old weather data collection.</param>
/// <param name="newWeatherData">The new weather data collection.</param>
/// <returns> the collection with the data</returns>
public async Task <WeatherDataCollection> MergeWeatherDataCollections(
WeatherDataCollection currentDataCollection, WeatherDataCollection newWeatherData)
{
this.oldWeatherDataCollection = currentDataCollection ??
throw new ArgumentNullException(nameof(this.oldWeatherDataCollection), "Current collection cannot be null.");
this.newWeatherDataCollection = newWeatherData ??
throw new ArgumentNullException(nameof(newWeatherData), "New collection cannot be null.");
var updatedWeatherDataCollection = new WeatherDataCollection();
this.addNonConflictingData(updatedWeatherDataCollection);
foreach (var conflictingDay in this.newWeatherDataCollection)
{
if (this.oldWeatherDataCollection.Any(oldDay => oldDay.Date.Equals(conflictingDay.Date)) &&
!this.isDoForAllChecked)
{
var keepOrReplace = new ReplaceOrKeepDialog(conflictingDay, newWeatherData.Count);
this.chosenResult = await keepOrReplace.ShowAsync();
this.isDoForAllChecked = keepOrReplace.IsDoForAllChecked;
}
this.addConflictingDayToUpdatedCollection(conflictingDay, updatedWeatherDataCollection);
}
var tempWeatherDataCollection = updatedWeatherDataCollection.ToList();
tempWeatherDataCollection.Sort();
updatedWeatherDataCollection.Clear();
foreach (var day in tempWeatherDataCollection)
{
updatedWeatherDataCollection.Add(day);
}
return(updatedWeatherDataCollection);
}