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1 using System.Collections.Generic;
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2 using System.Linq;
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3 using LibrarySystem.Interfaces;
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4
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5 namespace LibrarySystem.Core
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6 {
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7 public class Library : ILibrary
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8 {
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9 public string Location { get; set; }
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10 public IList<IStock> StockList { get; set; }
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11
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12 public Library()
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13 {
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14 StockList = new List<IStock>(0);
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15 }
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16
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17 public void AddStock(params IBook[] books)
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18 {
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19 var stock = new List<IStock>(StockList.Count + books.Length);
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20
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21 stock.AddRange(StockList);
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22
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23 foreach (var book in books)
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24 {
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25 stock.Add(new Stock() { Book = book, IsAvailable = true });
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26 }
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27
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28 StockList = stock;
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29 }
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30
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31 public bool IsBookAvailableByISBN(string isbn)
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32 {
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33 var qry = from books in StockList
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34 where books.Book.ISBN == isbn
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35 & books.IsAvailable
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36 select books.IsAvailable;
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37
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38 return qry.FirstOrDefault();
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39 }
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40
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41 public IList<IStock> FindBooks(string searchString)
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42 {
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43 searchString = searchString.ToLower();
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44
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45 var qry = from books in StockList
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46 where books.Book.Title.ToLower().Contains(searchString)
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47 || books.Book.Author.ToLower().Contains(searchString)
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48 select books;
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49
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50 return qry.ToList();
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51 }
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52
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53 public void LendBook(IPerson person, IBook book)
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54 {
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55 throw new System.NotImplementedException();
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56 }
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57 }
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58 }
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