feat: add database connections, initial migration and early CLI tooling

Program.cs

@@ -1,12 +1,34 @@
-using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Mvc.Formatters;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.OpenApi;
+using Shadow.Controllers;
+using Shadow.Data;
 using System.Reflection;
 
 var builder = WebApplication.CreateBuilder(args);
 
-builder.Services.AddControllers();
+string connectionString = builder.Configuration.GetConnectionString("DefaultConnection")
+	?? throw new ArgumentException("Connection string 'DefaultConnection' not found.");
+builder.Services.AddDbContext<ApplicationDbContext>(options =>
+{
+	options.UseNpgsql(connectionString);
+});
+
+builder.Services.AddControllers(options =>
+{
+	// Add XML serializer
+	options.OutputFormatters.Add(new XmlSerializerOutputFormatter());
+}).AddJsonOptions(options =>
+{
+	// Pretty-print JSON
+	options.JsonSerializerOptions.WriteIndented = true;
+
+	// Preserve keys' case
+	options.JsonSerializerOptions.PropertyNamingPolicy = null;
+});
 builder.Services.AddOpenApi();
 builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddScoped<GeneralUseHelpers>();
 builder.Services.AddSwaggerGen(options =>
 {
 	options.SwaggerDoc("v1", new OpenApiInfo
@@ -41,12 +63,33 @@ builder.Services.AddSwaggerGen(options =>
 	//    [new OpenApiSecuritySchemeReference("bearer", document)] = []
 	//});
 
-	// using System.Reflection;
 	var xmlFilename = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
 	options.IncludeXmlComments(Path.Combine(AppContext.BaseDirectory, xmlFilename));
 });
 
 var app = builder.Build();
+if (args.FirstOrDefault() is not null)
+{
+	// Handle CLI if arguments have been passed.
+	bool shutdown = false;
+	using (IServiceScope scope = app.Services.CreateScope())
+	{
+		ApplicationDbContext db = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+		GeneralUseHelpers  guhf = scope.ServiceProvider.GetRequiredService<GeneralUseHelpers>();
+		Cli                 cli = new(db, guhf, args);
+		shutdown = await cli.Parse();
+	}
+	if (shutdown) return;
+}
+// Seed database
+using (IServiceScope scope = app.Services.CreateScope())
+{
+	ApplicationDbContext db = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+	GeneralUseHelpers  guhf = scope.ServiceProvider.GetRequiredService<GeneralUseHelpers>();
+	Seeder           seeder = new(db, guhf);
+	seeder.Seed();
+}
+
 
 // Configure the HTTP request pipeline.
 if (app.Environment.IsDevelopment())