F3GSeSmg

1using System;
2using System.Collections.Generic;
3using System.Diagnostics;
4using System.Linq;
5using System.Threading;
6
7public class Foo1
8{
9    public static void Run()
10    {
11        var clients = GetClients();
12        Console.WriteLine($"Найдено {clients.Count} клиентов. Активных {clients.Where(e => e.IsActive).Count()}, неактивных {clients.Where(e => !e.IsActive).Count()}");
13
14        var appropriateClients = new List<Client>();
15        foreach (var client in clients)
16        {
17            if (!IsAppropriateEmail(client))
18            {
19                continue;
20            }
21
22            if (!client.IsActive)
23            {
24                continue;
25            }
26
27            appropriateClients.Add(client);
28        }
29
30        Console.WriteLine($"Найдено {appropriateClients.Count}");
31        Console.ReadLine();
32    }
33
34    private static bool IsAppropriateEmail(Client client)
35    {
36        return client.Email.EndsWith(".ru");
37    }
38
39    private static List<Client> GetClients()
40    {
41        //TODO: получать данных из БД
42        string[] domains = { "yandex.ru", "gmail.com", "mail.ru", "yandex.ua", "yandex.kz" };
43        var result = new List<Client>();
44
45        for (int i = 1; i <= 10000000; i++)
46        {
47            var client = new Client(name: GetName(i),
48                                    email: GetEmail(GetName(i), GetRandom(domains)),
49                                    isActive: GetRandomBool());
50           
51            result.Add(client);
52        }
53        return result;
54    }
55
56    private static Random R = new Random();
57
58    private static bool GetRandomBool()
59    {
60        return R.Next(0, 2) == 0;
61    }
62
63    private static string GetName(int id)
64    {
65        return $"client{id}";
66    }
67
68    private static string GetRandom(string[] domains)
69    {
70        return domains[R.Next(0, domains.Length)];
71    }
72
73    private static string GetEmail(string name, string domain)
74    {
75        return $"{name}@{domain}";
76    }
77
78    public class Client
79    {
80
81        public string Name { get; set; }
82        public string Email { get; set; }
83        public bool IsActive { get; set; }
84
85        public Client()
86        {
87
88        }
89
90        public Client(string name, string email, bool isActive)
91        {
92            Name = name;
93            Email = email;
94            IsActive = isActive;
95        }
96    }
97}