PIBD14-BOYKO-M.S.SuperEasyS.../ProjectElectroTrans/CollectionGenericObjects/StorageCollection.cs
2024-04-24 23:26:19 +04:00

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C#
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using ProjectElectroTrans.Drawnings;
using System.Text;
using ProjectElectroTrans.CollectionGenericObjects;
using ProjectElectroTrans.Exceptions;
using FileFormatException = ProjectElectroTrans.Exceptions.FileFormatException;
using FileNotFoundException = ProjectElectroTrans.Exceptions.FileNotFoundException;
namespace ProjectElectroTrans.CollectionGenericObjects;
/// <summary>
/// Класс-хранилище коллекций
/// </summary>
/// <typeparam name="T"></typeparam>
public class StorageCollection<T>
where T : DrawingTrans
{
/// <summary>
/// Словарь (хранилище) с коллекциями
/// </summary>
readonly Dictionary<string, ICollectionGenericObjects<T>> _storages;
/// <summary>
/// Возвращение списка названий коллекций
/// </summary>
public List<string> Keys => _storages.Keys.ToList();
/// <summary>
/// Ключевое слово, с которого должен начинаться файл
/// </summary>
private readonly string _collectionKey = "CollectionsStorage";
/// <summary>
/// Разделитель для записи ключа и значения элемента словаря
/// </summary>
private readonly string _separatorForKeyValue = "|";
/// <summary>
/// Разделитель для записей коллекции данных в файл
/// </summary>
private readonly string _separatorItems = ";";
/// <summary>
/// Конструктор
/// </summary>
public StorageCollection()
{
_storages = new Dictionary<string, ICollectionGenericObjects<T>>();
}
/// <summary>
/// Добавление коллекции в хранилище
/// </summary>
/// <param name="name">Название коллекции</param>
/// <param name="collectionType">тип коллекции</param>
public void AddCollection(string name, CollectionType collectionType)
{
if (_storages.ContainsKey(name)) throw new CollectionAlreadyExistsException(name);
if (collectionType == CollectionType.None) throw new CollectionTypeException("Пустой тип коллекции");
if (collectionType == CollectionType.Massive)
_storages[name] = new MassiveGenericObjects<T>();
else if (collectionType == CollectionType.List)
_storages[name] = new ListGenericObjects<T>();
}
/// <summary>
/// Удаление коллекции
/// </summary>
/// <param name="name">Название коллекции</param>
public void DelCollection(string name)
{
if (_storages.ContainsKey(name))
_storages.Remove(name);
}
/// <summary>
/// Доступ к коллекции
/// </summary>
/// <param name="name">Название коллекции</param>
/// <returns></returns>
public ICollectionGenericObjects<T>? this[string name]
{
get
{
if (_storages.ContainsKey(name))
return _storages[name];
return null;
}
}
/// <summary>
/// Сохранение информации по автомобилям в хранилище в файл
/// </summary>
/// <param name="filename">Путь и имя файла</param>
/// <returns>true - сохранение прошло успешно, false - ошибка при сохранении данных</returns>
public bool SaveData(string filename)
{
if (_storages.Count == 0)
{
throw new EmptyFileExeption();
}
if (File.Exists(filename))
{
File.Delete(filename);
}
using (StreamWriter writer = new StreamWriter(filename))
{
writer.Write(_collectionKey);
foreach (KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
{
StringBuilder sb = new();
sb.Append(Environment.NewLine);
// не сохраняем пустые коллекции
if (value.Value.Count == 0)
{
continue;
}
sb.Append(value.Key);
sb.Append(_separatorForKeyValue);
sb.Append(value.Value.GetCollectionType);
sb.Append(_separatorForKeyValue);
sb.Append(value.Value.MaxCount);
sb.Append(_separatorForKeyValue);
foreach (T? item in value.Value.GetItems())
{
string data = item?.GetDataForSave() ?? string.Empty;
if (string.IsNullOrEmpty(data))
{
continue;
}
sb.Append(data);
sb.Append(_separatorItems);
}
writer.Write(sb);
}
}
return true;
}
/// <summary>
/// Загрузка информации по автомобилям в хранилище из файла
/// </summary>
/// <param name="filename">Путь и имя файла</param>
/// <returns>true - загрузка прошла успешно, false - ошибка при загрузке данных</returns>
public bool LoadData(string filename)
{
if (!File.Exists(filename))
{
return false;
}
using (StreamReader fs = File.OpenText(filename))
{
string str = fs.ReadLine();
if (string.IsNullOrEmpty(str))
{
throw new FileNotFoundException(filename);
}
if (!str.StartsWith(_collectionKey))
{
throw new FileFormatException(filename);
}
_storages.Clear();
string strs = "";
while ((strs = fs.ReadLine()) != null)
{
string[] record = strs.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
if (record.Length != 4)
{
continue;
}
CollectionType collectionType = (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
ICollectionGenericObjects<T>? collection = StorageCollection<T>.CreateCollection(collectionType);
if (collection == null)
{
throw new CollectionTypeException("Не удалось определить тип коллекции:" + record[1]);
}
collection.MaxCount = Convert.ToInt32(record[2]);
string[] set = record[3].Split(_separatorItems, StringSplitOptions.RemoveEmptyEntries);
foreach (string elem in set)
{
if (elem?.CreateDrawningTrans() is T ship)
{
try
{
collection.Insert(ship);
}
catch (Exception ex)
{
throw new FileFormatException(filename, ex);
}
}
}
_storages.Add(record[0], collection);
}
return true;
}
if (!File.Exists(filename))
{
}
using (StreamReader fs = File.OpenText(filename))
{
string str = fs.ReadLine();
if (string.IsNullOrEmpty(str))
{
throw new EmptyFileExeption(filename);
}
if (!str.StartsWith(_collectionKey))
{
}
_storages.Clear();
string strs = "";
while ((strs = fs.ReadLine()) != null)
{
string[] record = strs.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
if (record.Length != 4)
{
continue;
}
CollectionType collectionType = (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
ICollectionGenericObjects<T>? collection = StorageCollection<T>.CreateCollection(collectionType);
if (collection == null)
{
}
collection.MaxCount = Convert.ToInt32(record[2]);
string[] set = record[3].Split(_separatorItems, StringSplitOptions.RemoveEmptyEntries);
foreach (string elem in set)
{
if (elem?.CreateDrawningTrans() is T ship)
{
try
{
if (collection.Insert(ship) == -1)
{
throw new CollectionTypeException("Объект не удалось добавить в коллекцию: " + record[3]);
}
}
catch (CollectionOverflowException ex)
{
throw ex.InnerException!;
}
}
}
_storages.Add(record[0], collection);
}
return true;
}
}
/// <summary>
/// Создание коллекции по типу
/// </summary>
/// <param name="collectionType"></param>
/// <returns></returns>
private static ICollectionGenericObjects<T>? CreateCollection(CollectionType collectionType)
{
return collectionType switch
{
CollectionType.Massive => new MassiveGenericObjects<T>(),
CollectionType.List => new ListGenericObjects<T>(),
_ => null,
};
}
}