public static void RegisterGoogleEngine(this IServiceCollection serviceCollection, Action <GoogleBuilder> builder)
{
var config = new GoogleBuilder();
builder(config);
if (string.IsNullOrEmpty(config.Key))
{
throw new NullReferenceException("Google API Key must be specified");
}
if (string.IsNullOrEmpty(config.Cx))
{
throw new NullReferenceException("Google Search Engine Id (cx) must be specified");
}
serviceCollection.AddSingleton <IGoogleConfiguration>(config);
serviceCollection.AddTransient <ISearchEngine, GoogleSearchEngine>();
if (SearcherRegistered)
{
return;
}
serviceCollection.AddTransient <ISearcher, Searcher>();
SearcherRegistered = true;
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
ReviewDirector director = new ReviewDirector();
GoogleBuilder googleBuilder = new GoogleBuilder();
director.constructBadGoogleReview(googleBuilder);
var badGoogleReview = googleBuilder.getReview();
FacebookBuilder facebookBuilder = new FacebookBuilder();
director.constructAmazingFacebookRecommendation(facebookBuilder);
var amazingFacebookReview = facebookBuilder.getReview();
}
