dschick/BreCal
dschick/BreCal
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Speicher-Logik erweitern

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This commit is contained in:
Daniel Schick 2023-04-15 18:58:24 +02:00
parent aa0c1d81d9
commit bbb986260c
10 changed files with 214 additions and 29 deletions
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27
src/RoleEditor/MainWindow.xaml.cs
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@ -16,6 +16,7 @@ using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using brecal.model;
using brecal.mysql;
namespace RoleEditor
{
@ -26,12 +27,13 @@ namespace RoleEditor
{
#region private fields
private ObservableCollection<Participant> _participants = new ObservableCollection<Participant>();
private ObservableCollection<Role> _roles = new ObservableCollection<Role>();
private ObservableCollection<Securable> _securables = new ObservableCollection<Securable>();
private ObservableCollection<User> _users = new ObservableCollection<User>();
private ObservableCollection<Role> _assignedRoles = new ObservableCollection<Role>();
private ObservableCollection<Securable> _assignedSecurables = new ObservableCollection<Securable>();
private readonly ObservableCollection<Participant> _participants = new ObservableCollection<Participant>();
private readonly ObservableCollection<Role> _roles = new ObservableCollection<Role>();
private readonly ObservableCollection<Securable> _securables = new ObservableCollection<Securable>();
private readonly ObservableCollection<User> _users = new ObservableCollection<User>();
private readonly ObservableCollection<Role> _assignedRoles = new ObservableCollection<Role>();
private readonly ObservableCollection<Securable> _assignedSecurables = new ObservableCollection<Securable>();
private DBManager? _dbManager;
#endregion
@ -45,11 +47,20 @@ namespace RoleEditor
private void Window_Loaded(object sender, RoutedEventArgs e)
{
// try database connection
try
{
_dbManager = new();
// load all participants
// load all participants
// load all roles
// load all roles
}
catch (Exception ex)
{
MessageBox.Show($"Database connection couldn't be established: {ex.Message}");
this.Close();
}
}
#endregion

11
src/brecal.model/DbEntity.cs
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@ -6,7 +6,7 @@ using System.Threading.Tasks;
namespace brecal.model
{
public class DbEntity
public abstract class DbEntity
{
/// <summary>
/// DB primary key
@ -23,5 +23,14 @@ namespace brecal.model
/// </summary>
public DateTime? Modified { get; set; }
/// <summary>
/// Each database entity must be able to save itself to the database
/// </summary>
public abstract void Save(IDBManager manager);
/// <summary>
/// Each entity must be able to delete itself
/// </summary>
public abstract void Delete(IDBManager manager);
}
}

4
src/brecal.model/IDBManager.cs
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@ -10,7 +10,9 @@ namespace brecal.model
public interface IDBManager
{
void Load(Action<IDbCommand> prepareAction, Action<IDataReader> loadAction);
delegate List<DbEntity> LoadFunc<T>(T entity);
Task<List<DbEntity>> Load(Action<IDbCommand> prepareAction, LoadFunc<IDataReader> loadAction);
Task<object?> ExecuteScalar(Action<IDbCommand> prepareAction);

121
src/brecal.model/Participant.cs
View File

@ -1,5 +1,6 @@
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
@ -22,6 +23,126 @@ namespace brecal.model
#endregion
#region abstract method implementation
// TODO: Diese Funktionen in die Basisklasse verschieben und die SetUpdate SetCreate SetDelete
// abstract machen
public async override void Save(IDBManager manager)
{
if (this.Created.HasValue)
await manager.ExecuteNonQuery(this.SetUpdate);
else
await manager.ExecuteNonQuery(this.SetCreate);
}
public async override void Delete(IDBManager manager)
{
await manager.ExecuteNonQuery(this.SetDelete);
}
#endregion
#region public static methods
public static async Task<List<Participant>> LoadAll(IDBManager manager)
{
List<DbEntity> loadResultList = await manager.Load(SetLoadQuery, LoadElems);
List<Participant> result = new List<Participant>();
foreach (Participant p in loadResultList.Cast<Participant>())
result.Add(p);
return result;
}
#endregion
#region parameter funcs
public static void SetLoadQuery(IDbCommand cmd)
{
cmd.CommandText = "SELECT id, name, street, postal_code, city, flags, created, modified FROM participant";
}
public void SetUpdate(IDbCommand cmd)
{
cmd.CommandText = "UPDATE participant set name = @NAME, street = @STREET, postal_code = @POSTAL_CODE, city = @CITY, flags = @FLAGS WHERE id = @ID";
this.SetParameters(cmd);
}
public void SetCreate(IDbCommand cmd)
{
cmd.CommandText = "INSERT INTO participant (name, street, postal_code, city, flags) VALUES ( @NAME, @STREET, @POSTAL_CODE, @CITY, @FLAGS)";
this.SetParameters(cmd);
}
public void SetDelete(IDbCommand cmd)
{
cmd.CommandText = "DELETE FROM participant WHERE id = @ID";
IDataParameter idParam = cmd.CreateParameter();
idParam.ParameterName = "ID";
idParam.Value = this.Id;
cmd.Parameters.Add(idParam);
}
public static List<DbEntity> LoadElems(IDataReader reader)
{
List<DbEntity> result = new List<DbEntity>();
while(reader.Read())
{
Participant p = new();
p.Id = (uint) reader.GetInt32(0);
if(!reader.IsDBNull(1)) p.Name = reader.GetString(1);
if(!reader.IsDBNull(2)) p.Street = reader.GetString(2);
if (!reader.IsDBNull(3)) p.PostalCode = reader.GetString(3);
if (!reader.IsDBNull(4)) p.City = reader.GetString(4);
if(!reader.IsDBNull(5)) p.Flags = (uint) reader.GetInt32(5);
if (!reader.IsDBNull(6)) p.Created = reader.GetDateTime(6);
if(!reader.IsDBNull(7)) p.Modified = reader.GetDateTime(7);
result.Add(p);
}
return result;
}
#endregion
#region private methods
private void SetParameters(IDbCommand cmd)
{
IDbDataParameter name = cmd.CreateParameter();
name.ParameterName = "NAME";
name.Value = this.Name;
cmd.Parameters.Add(name);
IDbDataParameter street = cmd.CreateParameter();
street.ParameterName = "STREET";
street.Value = this.Street;
cmd.Parameters.Add(street);
IDataParameter postal_code = cmd.CreateParameter();
postal_code.ParameterName = "POSTAL_CODE";
postal_code.Value = this.PostalCode;
cmd.Parameters.Add(postal_code);
IDataParameter city = cmd.CreateParameter();
city.ParameterName = "CITY";
city.Value = this.City;
cmd.Parameters.Add(city);
IDataParameter flags = cmd.CreateParameter();
flags.ParameterName = "FLAGS";
flags.Value = this.Flags;
cmd.Parameters.Add(flags);
IDataParameter idParam = cmd.CreateParameter();
idParam.ParameterName = "ID";
idParam.Value = this.Id;
cmd.Parameters.Add(idParam);
}
#endregion
#region overrides
public override string ToString()

10
src/brecal.model/Role.cs
View File

@ -19,6 +19,16 @@ namespace brecal.model
#region overrides
public async override void Save(IDBManager manager)
{
}
public async override void Delete(IDBManager manager)
{
}
public override string ToString()
{
return this.Name ?? $"{base.Id} - {this.GetType().Name}";

10
src/brecal.model/RoleAssignment.cs
View File

@ -17,5 +17,15 @@ namespace brecal.model
#endregion
public async override void Save(IDBManager manager)
{
}
public async override void Delete(IDBManager manager)
{
}
}
}

10
src/brecal.model/Securable.cs
View File

@ -17,6 +17,16 @@ namespace brecal.model
#region overrides
public async override void Save(IDBManager manager)
{
}
public async override void Delete(IDBManager manager)
{
}
public override string ToString()
{
return this.Name ?? $"{base.Id} - {this.GetType().Name}";

11
src/brecal.model/SecurableAssignment.cs
View File

@ -15,5 +15,16 @@ namespace brecal.model
public Securable? AssignedSecurable { get; set; }
#endregion
public async override void Save(IDBManager manager)
{
}
public async override void Delete(IDBManager manager)
{
}
}
}

10
src/brecal.model/User.cs
View File

@ -18,6 +18,16 @@
#region overrides
public async override void Save(IDBManager manager)
{
}
public async override void Delete(IDBManager manager)
{
}
public override string ToString()
{
return this.Username ?? $"{base.Id} - {this.GetType().Name}";

29
src/brecal.mysql/DBManager.cs
View File

@ -2,35 +2,26 @@
using MySqlConnector;
using System.Data;
using System.Runtime.CompilerServices;
using static brecal.model.IDBManager;
namespace brecal.mysql
{
public class DBManager : IDBManager
{
private static string _connectionString = "";
// TODO: remove this and use certificates instead
private static readonly string _connectionString = "Server=localhost;User ID=ds;Password=HalloWach23;Database=bremen_calling";
public async void Generic()
{
await using var connection = new MySqlConnection("Server=myserver;User ID=mylogin;Password=mypass;Database=mydatabase");
await connection.OpenAsync();
using var command = new MySqlCommand("SELECT field FROM table;", connection);
await using var reader = await command.ExecuteReaderAsync();
while (await reader.ReadAsync())
Console.WriteLine(reader.GetString(0));
}
public async void Load(Action<IDbCommand> prepareAction, Action<IDataReader> loadAction)
public async Task<List<DbEntity>> Load(Action<IDbCommand> prepareAction, LoadFunc<IDataReader> loadAction)
{
await using MySqlConnection connection = new MySqlConnection(_connectionString);
await connection.OpenAsync();
using MySqlCommand cmd = new MySqlCommand();
using MySqlCommand cmd = new();
cmd.Connection = connection;
prepareAction(cmd);
MySqlDataReader reader = await cmd.ExecuteReaderAsync();
loadAction(reader);
List<DbEntity> result = loadAction(reader);
reader.Close();
return result;
}
public async Task<object?> ExecuteScalar(Action<IDbCommand> prepareAction)
@ -38,7 +29,7 @@ namespace brecal.mysql
await using MySqlConnection connection = new MySqlConnection(_connectionString);
await connection.OpenAsync();
using MySqlCommand cmd = new MySqlCommand();
using MySqlCommand cmd = new();
cmd.Connection = connection;
prepareAction(cmd);
object? result = await cmd.ExecuteScalarAsync();
@ -47,10 +38,10 @@ namespace brecal.mysql
public async Task<int> ExecuteNonQuery(Action<IDbCommand> prepareAction)
{
await using MySqlConnection connection = new MySqlConnection(_connectionString);
await using MySqlConnection connection = new(_connectionString);
await connection.OpenAsync();
using MySqlCommand cmd = new MySqlCommand();
using MySqlCommand cmd = new();
cmd.Connection = connection;
prepareAction(cmd);
int result = await cmd.ExecuteNonQueryAsync();