// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddMemoryCache(options => {
options.SizeLimit = this.Configuration.GetValue <long?>("MemCache:SizeLimit", null);
});
ILyricsGenerator lyricsGenerator =
this.Configuration.GetValue <string>("Generator", null) == "dummy"
? new DummyLyrics()
: this.CreateGradientLyrics();
CheckGeneratorSanity(lyricsGenerator);
services.AddSingleton(lyricsGenerator);
services.Configure <IdentityOptions>(options => {
options.Password.RequiredUniqueChars = 4;
options.Password.RequiredLength = 5;
options.Password.RequireDigit = false;
options.Password.RequireLowercase = options.Password.RequireUppercase = false;
options.Password.RequireNonAlphanumeric = false;
});
services.Configure <CookiePolicyOptions>(options => {
// This lambda determines whether user consent for non-essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.AddDbContext <ApplicationDbContext>(this.ConfigureDbContext);
services.AddDefaultIdentity <SongsUser>()
.AddDefaultUI()
.AddEntityFrameworkStores <ApplicationDbContext>();
services.AddScoped <ISongDatabase, CachedSongDatabase>();
services.AddSingleton(sp => {
var scopedProvider = sp.CreateScope().ServiceProvider;
return(SongVoteCache.Load(scopedProvider.GetService <ApplicationDbContext>().Votes));
});
services.AddSingleton(sp => {
var scopedProvider = sp.CreateScope().ServiceProvider;
return(new PregeneratedSongProvider(
scopedProvider.GetService <ISongDatabase>(),
scopedProvider.GetService <ApplicationDbContext>().Songs,
sp.GetService <ILogger <PregeneratedSongProvider> >(),
sp.GetService <IHostApplicationLifetime>().ApplicationStopping));
});
services.AddSingleton <IRandomSongProvider>(sp => new RandomSongProviderCombinator(
new WeightedRandom <IRandomSongProvider>(
new Dictionary <IRandomSongProvider, int> {
[sp.GetRequiredService <PregeneratedSongProvider>()] = 3,
[new TopSongWeightedProvider(sp.GetRequiredService <SongVoteCache>())] = 1,
}
), logger: sp.GetService <ILogger <RandomSongProviderCombinator> >()));
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);
}
public static SongVoteCache Load(DbSet <SongVote> votes)
{
var result = new SongVoteCache();
foreach (var vote in votes.AsNoTracking())
{
if (vote.Upvote)
{
result.AddUpvotes(vote.SongID, 1);
}
else
{
result.AddDownvotes(vote.SongID, 1);
}
}
return(result);
}
public TopSongWeightedProvider(SongVoteCache voteCache)
{
this.voteCache = voteCache ?? throw new ArgumentNullException(nameof(voteCache));
}
