1
|
|
|
<?php |
2
|
|
|
/** |
3
|
|
|
* This file is part of the Composite Utils package. |
4
|
|
|
* |
5
|
|
|
* (c) Emily Shepherd <[email protected]> |
6
|
|
|
* |
7
|
|
|
* For the full copyright and license information, please view the |
8
|
|
|
* LICENSE.md file that was distributed with this source code. |
9
|
|
|
* |
10
|
|
|
* @package spaark/composite-utils |
11
|
|
|
* @author Emily Shepherd <emily@emilyshepherd> |
12
|
|
|
* @license MIT |
13
|
|
|
*/ |
14
|
|
|
|
15
|
|
|
namespace Spaark\CompositeUtils\Model\Collection; |
16
|
|
|
/** |
17
|
|
|
* Spaark Framework |
18
|
|
|
* |
19
|
|
|
* @author Emily Shepherd <[email protected]> |
20
|
|
|
* @copyright 2012-2015 Emily Shepherd |
21
|
|
|
*/ |
22
|
|
|
|
23
|
|
|
use \Spaark\CompositeUtils\Model\Base\Model; |
24
|
|
|
|
25
|
|
|
/** |
26
|
|
|
* Represents an abstract collection of items |
27
|
|
|
* |
28
|
|
|
* This can be interacted with in the same way a PHP array: |
29
|
|
|
* <pre><code> |
30
|
|
|
* $a = new Collection(); |
31
|
|
|
* $a['key'] = 'value'; |
32
|
|
|
* </code></pre> |
33
|
|
|
* |
34
|
|
|
* This class, on its own, does not add any new functionality over |
35
|
|
|
* PHP arrays. It is useful for two purposes: firstly as a means of |
36
|
|
|
* boxing a PHP array to ensure it is an object for type-hinting. |
37
|
|
|
* Secondly, other forms of Collection (such as Sets and HashMaps) may |
38
|
|
|
* extend this class and add their own functionality. |
39
|
|
|
*/ |
40
|
|
|
class Collection implements \ArrayAccess, \Iterator, \Countable |
41
|
|
|
{ |
42
|
|
|
/** |
43
|
|
|
* The raw data of this Collection |
44
|
|
|
* |
45
|
|
|
* @var array |
46
|
|
|
*/ |
47
|
|
|
protected $data = array( ); |
48
|
|
|
|
49
|
|
|
/** |
50
|
|
|
* The current position of the array pointer |
51
|
|
|
* |
52
|
|
|
* @var int |
53
|
|
|
*/ |
54
|
|
|
protected $pointer = 0; |
55
|
|
|
|
56
|
|
|
/** |
57
|
|
|
* Returns the current element |
58
|
|
|
* |
59
|
|
|
* @return mixed The current element |
60
|
|
|
*/ |
61
|
7 |
|
public function current() |
62
|
|
|
{ |
63
|
7 |
|
return $this->offsetGet($this->pointer); |
64
|
|
|
} |
65
|
|
|
|
66
|
|
|
/** |
67
|
|
|
* Returns the current key |
68
|
|
|
* |
69
|
|
|
* @return int The current key |
70
|
|
|
*/ |
71
|
|
|
public function key() |
72
|
|
|
{ |
73
|
|
|
return $this->pointer; |
74
|
|
|
} |
75
|
|
|
|
76
|
|
|
/** |
77
|
|
|
* Advances the internal pointer by one |
78
|
|
|
*/ |
79
|
5 |
|
public function next() |
80
|
|
|
{ |
81
|
5 |
|
$this->pointer++; |
82
|
|
|
|
83
|
5 |
|
return $this->valid() ? $this->offsetGet($this->pointer) : null; |
84
|
|
|
} |
85
|
|
|
|
86
|
|
|
/** |
87
|
|
|
* Checks if the given offset is set |
88
|
|
|
* |
89
|
|
|
* @param scalar $offset The offset to check |
90
|
|
|
* @return boolean True if the offset is set |
91
|
|
|
*/ |
92
|
29 |
|
public function offsetExists($offset) |
93
|
|
|
{ |
94
|
29 |
|
return isset($this->data[$offset]); |
95
|
|
|
} |
96
|
|
|
|
97
|
|
|
/** |
98
|
|
|
* Returns the data at the given offset |
99
|
|
|
* |
100
|
|
|
* @param scalar $offset The offset to get |
101
|
|
|
* @return mixed The value at the given offset |
102
|
|
|
*/ |
103
|
35 |
|
public function offsetGet($offset) |
104
|
|
|
{ |
105
|
35 |
|
return $this->data[$offset]; |
106
|
|
|
} |
107
|
|
|
|
108
|
|
|
/** |
109
|
|
|
* Adds a new key-value pair to the Collection |
110
|
|
|
* |
111
|
|
|
* If the key already exists in the collection, its key-value is |
112
|
|
|
* overwritten. |
113
|
|
|
* |
114
|
|
|
* @param scalar $offset The key to set |
115
|
|
|
* @param mixed $value The value to set |
116
|
|
|
*/ |
117
|
20 |
|
public function offsetSet($offset, $value) |
118
|
|
|
{ |
119
|
20 |
|
$this->data[$offset] = $value; |
120
|
20 |
|
} |
121
|
|
|
|
122
|
|
|
/** |
123
|
|
|
* Removes the given key-value pair from the Collection |
124
|
|
|
* |
125
|
|
|
* @param scalar $offset The key to unset |
126
|
|
|
*/ |
127
|
|
|
public function offsetUnset($offset) |
128
|
|
|
{ |
129
|
|
|
unset($this->data[$offset]); |
130
|
|
|
} |
131
|
|
|
|
132
|
|
|
/** |
133
|
|
|
* Resets the internal array pointer |
134
|
|
|
*/ |
135
|
7 |
|
public function rewind() |
136
|
|
|
{ |
137
|
7 |
|
$this->pointer = 0; |
138
|
|
|
|
139
|
7 |
|
return $this->offsetGet(0); |
140
|
|
|
} |
141
|
|
|
|
142
|
|
|
/** |
143
|
|
|
* Changes the position of the array pointer |
144
|
|
|
* |
145
|
|
|
* @param scalar $pos The position to seek to |
146
|
|
|
* @return mixed The value at that new point |
147
|
|
|
*/ |
148
|
|
|
public function seek($pos) |
149
|
|
|
{ |
150
|
|
|
$this->pointer = $pos; |
151
|
|
|
|
152
|
|
|
return $this->offsetGet($pos); |
153
|
|
|
} |
154
|
|
|
|
155
|
|
|
/** |
156
|
|
|
* Checks if there are any more elements to be read from the |
157
|
|
|
* Collection |
158
|
|
|
* |
159
|
|
|
* @return boolean True if there are one or more elements |
160
|
|
|
*/ |
161
|
7 |
|
public function valid() |
162
|
|
|
{ |
163
|
7 |
|
return $this->pointer < $this->size(); |
164
|
|
|
} |
165
|
|
|
|
166
|
|
|
/** |
167
|
|
|
* Adds an element to the Collection, without specifying a key |
168
|
|
|
* |
169
|
|
|
* @param scalar $offset The key to set |
170
|
|
|
* @param mixed $item The element to add |
171
|
|
|
*/ |
172
|
19 |
|
public function add($offset, $item) |
173
|
|
|
{ |
174
|
19 |
|
$this->offsetSet($offset, $item); |
175
|
19 |
|
} |
176
|
|
|
|
177
|
|
|
/** |
178
|
|
|
* Push an element onto the end of the array |
179
|
|
|
* |
180
|
|
|
* @param mixed $item The element to add |
181
|
|
|
*/ |
182
|
21 |
|
public function push($item) |
183
|
|
|
{ |
184
|
21 |
|
$this->offsetSet($this->size(), $item); |
185
|
21 |
|
} |
186
|
|
|
|
187
|
|
|
/** |
188
|
|
|
* Returns how many elements are in the Collection |
189
|
|
|
* |
190
|
|
|
* @return int The number of elements in the Collection |
191
|
|
|
*/ |
192
|
27 |
|
public function size() |
193
|
|
|
{ |
194
|
27 |
|
return count($this->data); |
195
|
|
|
} |
196
|
|
|
|
197
|
|
|
/** |
198
|
|
|
* Returns how many elements are in the Collection |
199
|
|
|
* |
200
|
|
|
* @return int The number of elements in the Collection |
201
|
|
|
*/ |
202
|
4 |
|
public function count() |
203
|
|
|
{ |
204
|
4 |
|
return $this->size(); |
205
|
|
|
} |
206
|
|
|
|
207
|
|
|
/** |
208
|
|
|
* Checks if the Collection is empty |
209
|
|
|
* |
210
|
|
|
* @return boolean True if the element is empty |
211
|
|
|
*/ |
212
|
2 |
|
public function empty() |
213
|
|
|
{ |
214
|
2 |
|
return $this->size() === 0; |
215
|
|
|
} |
216
|
|
|
|
217
|
|
|
/** |
218
|
|
|
* Clears the Collection of all data |
219
|
|
|
*/ |
220
|
|
|
public function clear() |
221
|
|
|
{ |
222
|
|
|
$this->data = array( ); |
223
|
|
|
} |
224
|
|
|
|
225
|
|
|
/** |
226
|
|
|
* Magic Method which returns the Collection's data when it is |
227
|
|
|
* passed to var_dump or similar |
228
|
|
|
* |
229
|
|
|
* This prevents the Collection from returning the large amount of |
230
|
|
|
* extra stuff that is contained within Collection, such as the |
231
|
|
|
* internal pointer and inherited interanal Model elements. |
232
|
|
|
* |
233
|
|
|
* @return array The data |
234
|
|
|
*/ |
235
|
|
|
public function __debugInfo() |
236
|
|
|
{ |
237
|
|
|
return $this->data; |
238
|
|
|
} |
239
|
|
|
} |
240
|
|
|
|