334 lines
13 KiB
C#
334 lines
13 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Data.SQLite;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace Учет_вещей
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{
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public static class DbManager
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{
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private const string DbFileName = "inventory.db";
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private static readonly string ConnectionString = $"Data Source={DbFileName};Version=3;";
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// Инициализация базы данных
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public static void InitializeDatabase()
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{
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// Проверяем существование файла базы данных
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bool isNewDatabase = !File.Exists(DbFileName);
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if (isNewDatabase)
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{
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// Создаем базу данных и необходимые таблицы
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SQLiteConnection.CreateFile(DbFileName);
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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// Создаем таблицы
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string createUsersTable = @"
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CREATE TABLE Users (
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Username TEXT PRIMARY KEY,
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Password TEXT NOT NULL,
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Role INTEGER NOT NULL
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)";
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string createDevicesTable = @"
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CREATE TABLE Devices (
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Id INTEGER PRIMARY KEY AUTOINCREMENT,
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Name TEXT NOT NULL,
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InventoryNumber TEXT NOT NULL,
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Type INTEGER NOT NULL,
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Location TEXT,
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ResponsiblePerson TEXT,
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State INTEGER NOT NULL,
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RegistrationDate TEXT NOT NULL
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)";
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using (var command = new SQLiteCommand(createUsersTable, connection))
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{
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command.ExecuteNonQuery();
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}
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using (var command = new SQLiteCommand(createDevicesTable, connection))
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{
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command.ExecuteNonQuery();
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}
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// Добавляем предустановленных пользователей
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string insertDefaultUsers = @"
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INSERT INTO Users (Username, Password, Role) VALUES
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('admin', 'admin', 1),
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('user', 'user', 0)";
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using (var command = new SQLiteCommand(insertDefaultUsers, connection))
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{
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command.ExecuteNonQuery();
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}
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}
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}
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}
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#region Пользователи
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// Авторизация пользователя
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public static User Authenticate(string username, string password)
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{
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = "SELECT Username, Password, Role FROM Users WHERE Username = @Username AND Password = @Password";
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using (var command = new SQLiteCommand(query, connection))
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{
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command.Parameters.AddWithValue("@Username", username);
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command.Parameters.AddWithValue("@Password", password);
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using (var reader = command.ExecuteReader())
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{
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if (reader.Read())
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{
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return new User
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{
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Username = reader["Username"].ToString(),
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Password = reader["Password"].ToString(),
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Role = (UserRole)Convert.ToInt32(reader["Role"])
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};
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}
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}
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}
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}
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return null;
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}
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#endregion
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#region Устройства
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// Получение всех устройств
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public static List<Device> GetAllDevices()
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{
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List<Device> devices = new List<Device>();
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = "SELECT * FROM Devices";
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using (var command = new SQLiteCommand(query, connection))
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{
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using (var reader = command.ExecuteReader())
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{
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while (reader.Read())
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{
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devices.Add(ReadDeviceFromDb(reader));
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}
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}
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}
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}
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return devices;
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}
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// Добавление нового устройства
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public static void AddDevice(Device device)
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{
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = @"
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INSERT INTO Devices (Name, InventoryNumber, Type, Location, ResponsiblePerson, State, RegistrationDate)
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VALUES (@Name, @InventoryNumber, @Type, @Location, @ResponsiblePerson, @State, @RegistrationDate);
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SELECT last_insert_rowid();";
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using (var command = new SQLiteCommand(query, connection))
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{
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SetDeviceParameters(command, device);
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device.Id = Convert.ToInt32(command.ExecuteScalar());
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}
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}
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}
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// Обновление существующего устройства
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public static void UpdateDevice(Device device)
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{
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = @"
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UPDATE Devices
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SET Name = @Name,
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InventoryNumber = @InventoryNumber,
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Type = @Type,
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Location = @Location,
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ResponsiblePerson = @ResponsiblePerson,
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State = @State,
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RegistrationDate = @RegistrationDate
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WHERE Id = @Id";
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using (var command = new SQLiteCommand(query, connection))
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{
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command.Parameters.AddWithValue("@Id", device.Id);
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SetDeviceParameters(command, device);
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command.ExecuteNonQuery();
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}
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}
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}
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// Удаление устройства
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public static void DeleteDevice(int id)
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{
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = "DELETE FROM Devices WHERE Id = @Id";
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using (var command = new SQLiteCommand(query, connection))
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{
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command.Parameters.AddWithValue("@Id", id);
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command.ExecuteNonQuery();
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}
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}
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}
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// Фильтрация устройств
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public static List<Device> FilterDevices(DeviceType? type = null, DeviceState? state = null,
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string location = null, string searchText = null)
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{
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List<Device> devices = new List<Device>();
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StringBuilder queryBuilder = new StringBuilder("SELECT * FROM Devices WHERE 1=1");
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Dictionary<string, object> parameters = new Dictionary<string, object>();
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if (type.HasValue)
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{
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queryBuilder.Append(" AND Type = @Type");
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parameters.Add("@Type", (int)type.Value);
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}
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if (state.HasValue)
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{
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queryBuilder.Append(" AND State = @State");
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parameters.Add("@State", (int)state.Value);
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}
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if (!string.IsNullOrEmpty(location))
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{
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queryBuilder.Append(" AND Location LIKE @Location");
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parameters.Add("@Location", "%" + location + "%");
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}
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if (!string.IsNullOrEmpty(searchText))
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{
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queryBuilder.Append(" AND (Name LIKE @SearchText OR InventoryNumber LIKE @SearchText)");
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parameters.Add("@SearchText", "%" + searchText.ToLower() + "%");
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}
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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using (var command = new SQLiteCommand(queryBuilder.ToString(), connection))
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{
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foreach (var param in parameters)
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{
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command.Parameters.AddWithValue(param.Key, param.Value);
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}
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using (var reader = command.ExecuteReader())
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{
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while (reader.Read())
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{
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devices.Add(ReadDeviceFromDb(reader));
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}
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}
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}
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}
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return devices;
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}
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// Статистика по типам устройств
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public static Dictionary<DeviceType, int> GetDeviceTypeStats()
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{
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var result = new Dictionary<DeviceType, int>();
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using (var connection = new SQLiteConnection(ConnectionString))
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{
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connection.Open();
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string query = "SELECT Type, COUNT(*) as Count FROM Devices GROUP BY Type";
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using (var command = new SQLiteCommand(query, connection))
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{
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using (var reader = command.ExecuteReader())
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{
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while (reader.Read())
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{
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DeviceType type = (DeviceType)Convert.ToInt32(reader["Type"]);
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int count = Convert.ToInt32(reader["Count"]);
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result[type] = count;
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}
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}
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}
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}
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return result;
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}
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// Экспорт данных в CSV
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public static void ExportToCsv(string filePath)
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{
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var devices = GetAllDevices();
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var lines = new List<string>
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{
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"ID;Наименование;Инвентарный номер;Тип;Местоположение;Ответственное лицо;Состояние;Дата постановки на учёт"
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};
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foreach (var device in devices)
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{
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lines.Add($"{device.Id};{device.Name};{device.InventoryNumber};{device.TypeString};" +
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$"{device.Location};{device.ResponsiblePerson};{device.StateString};{device.RegistrationDate:dd.MM.yyyy}");
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}
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File.WriteAllLines(filePath, lines, Encoding.UTF8);
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}
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#endregion
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#region Вспомогательные методы
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// Чтение устройства из базы данных
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private static Device ReadDeviceFromDb(SQLiteDataReader reader)
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{
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return new Device
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{
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Id = Convert.ToInt32(reader["Id"]),
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Name = reader["Name"].ToString(),
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InventoryNumber = reader["InventoryNumber"].ToString(),
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Type = (DeviceType)Convert.ToInt32(reader["Type"]),
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Location = reader["Location"].ToString(),
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ResponsiblePerson = reader["ResponsiblePerson"].ToString(),
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State = (DeviceState)Convert.ToInt32(reader["State"]),
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RegistrationDate = Convert.ToDateTime(reader["RegistrationDate"])
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};
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}
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// Установка параметров устройства для команды SQLite
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private static void SetDeviceParameters(SQLiteCommand command, Device device)
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{
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command.Parameters.AddWithValue("@Name", device.Name);
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command.Parameters.AddWithValue("@InventoryNumber", device.InventoryNumber);
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command.Parameters.AddWithValue("@Type", (int)device.Type);
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command.Parameters.AddWithValue("@Location", device.Location ?? string.Empty);
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command.Parameters.AddWithValue("@ResponsiblePerson", device.ResponsiblePerson ?? string.Empty);
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command.Parameters.AddWithValue("@State", (int)device.State);
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command.Parameters.AddWithValue("@RegistrationDate", device.RegistrationDate.ToString("yyyy-MM-dd HH:mm:ss"));
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}
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#endregion
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}
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}
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