|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Ksdev\ShoppingCart; |
|
4
|
|
|
|
|
5
|
|
|
use Countable; |
|
6
|
|
|
use Iterator; |
|
7
|
|
|
|
|
8
|
|
|
class Cart implements Iterator, Countable |
|
9
|
|
|
{ |
|
10
|
|
|
/** |
|
11
|
|
|
* Array stores the list of items in the cart |
|
12
|
|
|
* |
|
13
|
|
|
* @var array $items |
|
14
|
|
|
*/ |
|
15
|
|
|
protected $items = []; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* For tracking iterations |
|
19
|
|
|
* |
|
20
|
|
|
* @var int $position |
|
21
|
|
|
*/ |
|
22
|
|
|
protected $position = 0; |
|
23
|
|
|
|
|
24
|
|
|
/** |
|
25
|
|
|
* For storing the Stock Keeping Units, as a convenience |
|
26
|
|
|
* |
|
27
|
|
|
* @var array $skus |
|
28
|
|
|
*/ |
|
29
|
|
|
protected $skus = []; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* Currency instance |
|
33
|
|
|
* |
|
34
|
|
|
* @var Currency $currency |
|
35
|
|
|
*/ |
|
36
|
|
|
protected $currency; |
|
37
|
|
|
|
|
38
|
|
|
/** |
|
39
|
|
|
* Sets the currency for all the items in the cart |
|
40
|
|
|
* |
|
41
|
|
|
* @param Currency $currency |
|
42
|
|
|
*/ |
|
43
|
|
|
public function __construct(Currency $currency) |
|
44
|
|
|
{ |
|
45
|
|
|
$this->currency = $currency; |
|
46
|
|
|
} |
|
47
|
|
|
|
|
48
|
|
|
/** |
|
49
|
|
|
* Returns a Boolean indicating if the cart is empty |
|
50
|
|
|
* |
|
51
|
|
|
* @return bool |
|
52
|
|
|
*/ |
|
53
|
|
|
public function isEmpty() |
|
54
|
|
|
{ |
|
55
|
|
|
return empty($this->items); |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
|
|
/** |
|
59
|
|
|
* Gets an item with given SKU from the cart |
|
60
|
|
|
* |
|
61
|
|
|
* @param string $sku |
|
62
|
|
|
* |
|
63
|
|
|
* @return array |
|
64
|
|
|
*/ |
|
65
|
|
|
public function getItem($sku) |
|
66
|
|
|
{ |
|
67
|
|
|
if (isset($this->items[$sku])) { |
|
68
|
|
|
$item = $this->items[$sku]; |
|
69
|
|
|
} else { |
|
70
|
|
|
$item = []; |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
return $item; |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
/** |
|
77
|
|
|
* Adds a new item to the cart |
|
78
|
|
|
* |
|
79
|
|
|
* @param Item $item |
|
80
|
|
|
*/ |
|
81
|
|
|
public function addItem(Item $item) |
|
82
|
|
|
{ |
|
83
|
|
|
$sku = $item->getSku(); |
|
84
|
|
|
|
|
85
|
|
|
if (isset($this->items[$sku])) { |
|
86
|
|
|
$this->updateItem($item, $this->items[$sku]['qty'] + 1); |
|
87
|
|
|
} else { |
|
88
|
|
|
$this->items[$sku] = array('item' => $item, 'qty' => 1); |
|
89
|
|
|
$this->skus[] = $sku; |
|
90
|
|
|
} |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
/** |
|
94
|
|
|
* Changes an item already in the cart |
|
95
|
|
|
* |
|
96
|
|
|
* @param Item $item |
|
97
|
|
|
* @param integer $qty If the quantity is 0, then the item is removed from the cart, otherwise updates quantity |
|
98
|
|
|
*/ |
|
99
|
|
|
public function updateItem(Item $item, $qty) |
|
100
|
|
|
{ |
|
101
|
|
|
$sku = $item->getSku(); |
|
102
|
|
|
|
|
103
|
|
|
if ($qty === 0) { |
|
104
|
|
|
$this->deleteItem($item); |
|
105
|
|
|
} elseif (($qty > 0) && ($qty != $this->items[$sku]['qty'])) { |
|
106
|
|
|
$this->items[$sku]['qty'] = $qty; |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
} |
|
110
|
|
|
|
|
111
|
|
|
/** |
|
112
|
|
|
* Removes an item from the cart |
|
113
|
|
|
* |
|
114
|
|
|
* @param Item $item |
|
115
|
|
|
*/ |
|
116
|
|
|
public function deleteItem(Item $item) |
|
117
|
|
|
{ |
|
118
|
|
|
$sku = $item->getSku(); |
|
119
|
|
|
|
|
120
|
|
|
if (isset($this->items[$sku])) { |
|
121
|
|
|
unset($this->items[$sku]); |
|
122
|
|
|
|
|
123
|
|
|
$index = array_search($sku, $this->skus); |
|
124
|
|
|
unset($this->skus[$index]); |
|
125
|
|
|
|
|
126
|
|
|
// Recreate array to prevent holes: |
|
127
|
|
|
$this->skus = array_values($this->skus); |
|
128
|
|
|
} |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
/** |
|
132
|
|
|
* Get the total price of all the cart items |
|
133
|
|
|
* |
|
134
|
|
|
* @return string |
|
135
|
|
|
*/ |
|
136
|
|
|
public function total() |
|
137
|
|
|
{ |
|
138
|
|
|
$sum = '0.00'; |
|
139
|
|
|
foreach ($this->items as $item) { |
|
140
|
|
|
$price = bcmul($item['item']->getPrice(), (string)$item['qty'], 2); |
|
141
|
|
|
$sum = bcadd($sum, $price, 2); |
|
142
|
|
|
} |
|
143
|
|
|
return $sum; |
|
144
|
|
|
} |
|
145
|
|
|
|
|
146
|
|
|
/** |
|
147
|
|
|
* Get the cart items currency |
|
148
|
|
|
* |
|
149
|
|
|
* @return Currency |
|
150
|
|
|
*/ |
|
151
|
|
|
public function getCurrency() |
|
152
|
|
|
{ |
|
153
|
|
|
return $this->currency; |
|
154
|
|
|
} |
|
155
|
|
|
|
|
156
|
|
|
/** |
|
157
|
|
|
* Count all items; required by Countable |
|
158
|
|
|
* |
|
159
|
|
|
* @return int |
|
160
|
|
|
*/ |
|
161
|
|
|
public function count() |
|
162
|
|
|
{ |
|
163
|
|
|
$num = 0; |
|
164
|
|
|
foreach ($this->items as $item) { |
|
165
|
|
|
$num += $item['qty']; |
|
166
|
|
|
} |
|
167
|
|
|
|
|
168
|
|
|
return $num; |
|
169
|
|
|
} |
|
170
|
|
|
|
|
171
|
|
|
/** |
|
172
|
|
|
* Count unique items |
|
173
|
|
|
* |
|
174
|
|
|
* @return int |
|
175
|
|
|
*/ |
|
176
|
|
|
public function countUnique() |
|
177
|
|
|
{ |
|
178
|
|
|
return count($this->items); |
|
179
|
|
|
} |
|
180
|
|
|
|
|
181
|
|
|
/** |
|
182
|
|
|
* Required by Iterator; returns the current value |
|
183
|
|
|
* |
|
184
|
|
|
* @return array |
|
185
|
|
|
*/ |
|
186
|
|
|
public function current() |
|
187
|
|
|
{ |
|
188
|
|
|
$index = $this->skus[$this->position]; |
|
189
|
|
|
|
|
190
|
|
|
return $this->items[$index]; |
|
191
|
|
|
|
|
192
|
|
|
} |
|
193
|
|
|
|
|
194
|
|
|
/** |
|
195
|
|
|
* Required by Iterator; returns the current key |
|
196
|
|
|
* |
|
197
|
|
|
* @return int |
|
198
|
|
|
*/ |
|
199
|
|
|
public function key() |
|
200
|
|
|
{ |
|
201
|
|
|
return $this->position; |
|
202
|
|
|
} |
|
203
|
|
|
|
|
204
|
|
|
/** |
|
205
|
|
|
* Required by Iterator; increments the position |
|
206
|
|
|
*/ |
|
207
|
|
|
public function next() |
|
208
|
|
|
{ |
|
209
|
|
|
$this->position++; |
|
210
|
|
|
} |
|
211
|
|
|
|
|
212
|
|
|
/** |
|
213
|
|
|
* Required by Iterator; returns the position to the first spot |
|
214
|
|
|
*/ |
|
215
|
|
|
public function rewind() |
|
216
|
|
|
{ |
|
217
|
|
|
$this->position = 0; |
|
218
|
|
|
} |
|
219
|
|
|
|
|
220
|
|
|
/** |
|
221
|
|
|
* Required by Iterator; returns a Boolean indiating if a value is indexed at this position |
|
222
|
|
|
* |
|
223
|
|
|
* @return bool |
|
224
|
|
|
*/ |
|
225
|
|
|
public function valid() |
|
226
|
|
|
{ |
|
227
|
|
|
return (isset($this->skus[$this->position])); |
|
228
|
|
|
} |
|
229
|
|
|
} |
|
230
|
|
|
|