/// <summary>
/// Initializes a new instance of the <see cref="NavigationContext"/> class for a region name and a
/// <see cref="Uri"/>.
/// </summary>
/// <param name="navigationService">The navigation service.</param>
/// <param name="navigationParameters">The navigation parameters.</param>
/// <param name="uri">The Uri.</param>
public NavigationContext(IRegionNavigationService navigationService, Uri uri, NavigationParameters navigationParameters)
{
NavigationService = navigationService;
Uri = uri;
Parameters = uri != null?UriParsingHelper.ParseQuery(uri) : null;
GetNavigationParameters(navigationParameters);
}
/// <summary>
/// Returns the candidate TargetContract based on the <see cref="NavigationContext"/>.
/// </summary>
/// <param name="navigationContext">The navigation contract.</param>
/// <returns>The candidate contract to seek within the <see cref="IRegion"/> and to use, if not found, when resolving from the container.</returns>
protected virtual string GetContractFromNavigationContext(NavigationContext navigationContext)
{
if (navigationContext == null)
{
throw new ArgumentNullException(nameof(navigationContext));
}
var candidateTargetContract = UriParsingHelper.GetAbsolutePath(navigationContext.Uri);
candidateTargetContract = candidateTargetContract.TrimStart('/');
return(candidateTargetContract);
}