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SvetoforVKBot/Models/Commands/Command.cs

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+using SvetoforVKBot.Models.Updates;
+using System;
+using System.Data.SqlClient;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+using VkNet;
+
+namespace SvetoforVKBot.Models.Commands
+{
+    public abstract class Command
+    {
+        public abstract string Name { get; }
+
+        public abstract void Execute(RootObject update, VkApi client, SvetoforVKBot.Data.SvetoforVKBotEntities db);
+
+        public abstract void ExecutePL(RootObject update, VkApi client, SvetoforVKBot.Data.SvetoforVKBotEntities db);
+
+        public bool StartsWith(string command)
+        {
+            return command.StartsWith(this.Name);
+        }
+
+        private static readonly RandomNumberGenerator Rng = RandomNumberGenerator.Create();
+        public int GetRandomId()
+        {
+
+            var intBytes = new byte[4];
+
+            Rng.GetBytes(intBytes);
+
+            return BitConverter.ToInt32(intBytes, 0);
+
+        }
+
+        public async Task<string> UploadFile(string serverUrl, string file, string fileExtension)
+        {
+            // Получение массива байтов из файла
+            var data = GetBytesNet(file);
+
+            // Создание запроса на загрузку файла на сервер
+            using (var client = new HttpClient())
+            {
+                var requestContent = new MultipartFormDataContent();
+                var content = new ByteArrayContent(data);
+                content.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data");
+                requestContent.Add(content, "file", $"file.{fileExtension}");
+
+                var response = client.PostAsync(serverUrl, requestContent).Result;
+                return Encoding.Default.GetString(await response.Content.ReadAsByteArrayAsync());
+            }
+        }
+        private byte[] GetBytesNet(string fileUrl)
+        {
+            using (var webClient = new WebClient())
+            {
+                return webClient.DownloadData(fileUrl);
+            }
+        }
+        private byte[] GetBytesLocal(string filePath)
+        {
+            return File.ReadAllBytes(filePath);
+        }
+    }
+}