Discord-History-Tracker/app/Server/Endpoints/TrackUsersEndpoint.cs

using System.Net;
using System.Text.Json;
using System.Threading.Tasks;
using DHT.Server.Data;
using DHT.Server.Database;
using DHT.Utils.Http;
using Microsoft.AspNetCore.Http;

namespace DHT.Server.Endpoints;

sealed class TrackUsersEndpoint : BaseEndpoint {
	public TrackUsersEndpoint(IDatabaseFile db) : base(db) {}

	protected override async Task<IHttpOutput> Respond(HttpContext ctx) {
		var root = await ReadJson(ctx);

		if (root.ValueKind != JsonValueKind.Array) {
			throw new HttpException(HttpStatusCode.BadRequest, "Expected root element to be an array.");
		}

		var users = new User[root.GetArrayLength()];
		int i = 0;

		foreach (JsonElement user in root.EnumerateArray()) {
			users[i++] = ReadUser(user, "user");
		}

		Db.AddUsers(users);

		return HttpOutput.None;
	}

	private static User ReadUser(JsonElement json, string path) => new() {
		Id = json.RequireSnowflake("id", path),
		Name = json.RequireString("name", path),
		AvatarUrl = json.HasKey("avatar") ? json.RequireString("avatar", path) : null,
		Discriminator = json.HasKey("discriminator") ? json.RequireString("discriminator", path) : null
	};
}