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1 using System;
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2 using System.Collections.Generic;
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3
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4 namespace PetShop.BusinessLogic
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5 {
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6 using ObjectModel;
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7
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8 [Serializable]
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9 public class Cart
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10 {
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11 /// <summary>
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12 /// Calculate the total for all the cartItems in the Cart
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13 /// </summary>
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14 public decimal Total
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15 {
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16 get
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17 {
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18 decimal total = 0;
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19
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20 foreach (CartItem item in _items.Values)
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21 total += item.Subtotal;
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22
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23 return total;
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24 }
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25 }
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26
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27 /// <summary>
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28 /// Update the quantity for item that exists in the cart
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29 /// </summary>
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30 /// <param name="itemId">Item Id</param>
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31 /// <param name="qty">Quantity</param>
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32 public void SetQuantity(string itemId, int qty)
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33 {
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34 _items[itemId].Quantity = qty;
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35 }
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36
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37 /// <summary>
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38 /// Return the number of unique items in cart
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39 /// </summary>
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40 public int Count
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41 {
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42 get { return _items.Count; }
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43 }
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44
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45 /// <summary>
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46 /// Add an item to the cart.
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47 /// When ItemId to be added has already existed, this method will update the quantity instead.
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48 /// </summary>
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49 /// <param name="itemId">Item Id of item to add</param>
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50 public void Add(string itemId)
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51 {
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52 CartItem cartItem;
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53
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54 if (!_items.TryGetValue(itemId, out cartItem))
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55 {
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56 Item item = new ProductManager().GetItem(itemId);
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57
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58 if (item != null)
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59 {
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60 cartItem = new CartItem();
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61
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62 cartItem.ItemID = itemId;
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63 cartItem.Name = item.ProductName;
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64 cartItem.Price = (decimal)item.Price;
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65 cartItem.Type = item.Name;
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66 cartItem.CategoryID = item.CategoryID;
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67 cartItem.ProductID = item.ProductID;
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68
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69 _items.Add(itemId, cartItem);
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70 }
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71 }
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72
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73 cartItem.Quantity++;
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74 }
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75
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76 /// <summary>
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77 /// Add an item to the cart.
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78 /// When ItemId to be added has already existed, this method will update the quantity instead.
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79 /// </summary>
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80 /// <param name="item">Item to add</param>
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81 public void Add(CartItem item)
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82 {
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83 CartItem cartItem;
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84
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85 if (!_items.TryGetValue(item.ItemID, out cartItem))
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86 _items.Add(item.ItemID, item);
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87 else
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88 cartItem.Quantity += item.Quantity;
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89 }
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90
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91 /// <summary>
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92 /// Remove item from the cart based on <paramref name="itemId"/>
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93 /// </summary>
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94 /// <param name="itemId">ItemId of item to remove</param>
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95 public void Remove(string itemId)
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96 {
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97 _items.Remove(itemId);
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98 }
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99
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100 // Internal storage for a cart
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101 private Dictionary<string, CartItem> _items = new Dictionary<string, CartItem>();
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102
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103 /// <summary>
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104 /// Returns all items in the cart. Useful for looping through the cart.
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105 /// </summary>
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106 /// <returns>Collection of CartItemInfo</returns>
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107 public ICollection<CartItem> Items
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108 {
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109 get { return _items.Values; }
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110 }
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111
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112 /// <summary>
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113 /// Method to convert all cart items to order line items
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114 /// </summary>
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115 /// <returns>A new array of order line items</returns>
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116 public OrderLineItem[] GetOrderLineItems()
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117 {
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118 OrderLineItem[] items = new OrderLineItem[_items.Count];
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119
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120 int lineNum = 0;
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121
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122 foreach (CartItem item in _items.Values)
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123 {
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124 OrderLineItem line = new OrderLineItem();
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125
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126 items[lineNum] = line;
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127
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128 line.ItemID = item.ItemID;
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129 line.Line = ++lineNum;
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130 line.Quantity = item.Quantity;
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131 line.Price = item.Price;
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132 }
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133
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134 return items;
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135 }
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136
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137 /// <summary>
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138 /// Clear the cart
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139 /// </summary>
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140 public void Clear()
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141 {
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142 _items.Clear();
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143 }
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144 }
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145 }
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