PIbd-13_Ladyagin_P.D._Simple/AirplaneWithRadar/ProjectAirplaneWithRadar/CollectionGenericObjects/StorageCollection.cs

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using System.Text;
using ProjectAirplaneWithRadar.Drawnings;
namespace ProjectAirplaneWithRadar.CollectionGenericObjects
{
/// <summary>
/// Класс-хранилище коллекций
/// </summary>
/// <typeparam name="T"></typeparam>
public class StorageCollection<T>
where T : DrawningAirplane
{
/// <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 (name == null || _storages.ContainsKey(name))
return;
switch (collectionType)
{
case CollectionType.None:
return;
case CollectionType.Massive:
_storages[name] = new MassiveGenericObjects<T>();
return;
case CollectionType.List:
_storages[name] = new ListGenericObjects<T>();
return;
}
}
/// <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 (name == null || !_storages.ContainsKey(name))
return null;
return _storages[name];
}
}
/// <summary>
/// Сохранение информации по самолетам 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)
return false;
if(File.Exists(filename))
File.Delete(filename);
StringBuilder sb = new();
sb.Append(_collectionKey);
foreach(KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
{
sb.Append(Environment.NewLine);
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);
}
}
using FileStream fs = new(filename, FileMode.Create);
byte[] info = new UTF8Encoding(true).GetBytes(sb.ToString());
fs.Write(info, 0, info.Length);
return true;
}
/// <summary>
/// Загрузка информации по самолетам 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;
}
string bufferTextFromFile = "";
using (FileStream fs = new(filename, FileMode.Open))
{
byte[] b = new byte[fs.Length];
UTF8Encoding temp = new(true);
while (fs.Read(b, 0, b.Length) > 0)
{
bufferTextFromFile += temp.GetString(b);
}
}
string[] strs = bufferTextFromFile.Split(new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
if (strs == null || strs.Length == 0)
{
return false;
}
if (!strs[0].Equals(_collectionKey))
{
return false;
}
_storages.Clear();
foreach (string data in strs)
{
string[] record = data.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)
{
return false;
}
collection.MaxCount = Convert.ToInt32(record[2]);
string[] set = record[3].Split(_separatorItems, StringSplitOptions.RemoveEmptyEntries);
foreach (string elem in set)
{
if (elem?.CreateDrawningAirplane() is T airplane)
{
if (collection.Insert(airplane) == -1)
return false;
}
}
_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,
};
}
}
}