1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
<?php
namespace Shaarli\Bookmark;
use Shaarli\Bookmark\Exception\InvalidBookmarkException;
/**
* Class BookmarkArray
*
* Implementing ArrayAccess, this allows us to use the bookmark list
* as an array and iterate over it.
*
* @package Shaarli\Bookmark
*/
class BookmarkArray implements \Iterator, \Countable, \ArrayAccess
{
/**
* @var Bookmark[]
*/
protected $bookmarks;
/**
* @var array List of all bookmarks IDS mapped with their array offset.
* Map: id->offset.
*/
protected $ids;
/**
* @var int Position in the $this->keys array (for the Iterator interface)
*/
protected $position;
/**
* @var array List of offset keys (for the Iterator interface implementation)
*/
protected $keys;
/**
* @var array List of all recorded URLs (key=url, value=bookmark offset)
* for fast reserve search (url-->bookmark offset)
*/
protected $urls;
public function __construct()
{
$this->ids = [];
$this->bookmarks = [];
$this->keys = [];
$this->urls = [];
$this->position = 0;
}
/**
* Countable - Counts elements of an object
*
* @return int Number of bookmarks
*/
public function count()
{
return count($this->bookmarks);
}
/**
* ArrayAccess - Assigns a value to the specified offset
*
* @param int $offset Bookmark ID
* @param Bookmark $value instance
*
* @throws InvalidBookmarkException
*/
public function offsetSet($offset, $value)
{
if (! $value instanceof Bookmark
|| $value->getId() === null || empty($value->getUrl())
|| ($offset !== null && ! is_int($offset)) || ! is_int($value->getId())
|| $offset !== null && $offset !== $value->getId()
) {
throw new InvalidBookmarkException($value);
}
// If the bookmark exists, we reuse the real offset, otherwise new entry
if ($offset !== null) {
$existing = $this->getBookmarkOffset($offset);
} else {
$existing = $this->getBookmarkOffset($value->getId());
}
if ($existing !== null) {
$offset = $existing;
} else {
$offset = count($this->bookmarks);
}
$this->bookmarks[$offset] = $value;
$this->urls[$value->getUrl()] = $offset;
$this->ids[$value->getId()] = $offset;
}
/**
* ArrayAccess - Whether or not an offset exists
*
* @param int $offset Bookmark ID
*
* @return bool true if it exists, false otherwise
*/
public function offsetExists($offset)
{
return array_key_exists($this->getBookmarkOffset($offset), $this->bookmarks);
}
/**
* ArrayAccess - Unsets an offset
*
* @param int $offset Bookmark ID
*/
public function offsetUnset($offset)
{
$realOffset = $this->getBookmarkOffset($offset);
$url = $this->bookmarks[$realOffset]->getUrl();
unset($this->urls[$url]);
unset($this->ids[$realOffset]);
unset($this->bookmarks[$realOffset]);
}
/**
* ArrayAccess - Returns the value at specified offset
*
* @param int $offset Bookmark ID
*
* @return Bookmark|null The Bookmark if found, null otherwise
*/
public function offsetGet($offset)
{
$realOffset = $this->getBookmarkOffset($offset);
return isset($this->bookmarks[$realOffset]) ? $this->bookmarks[$realOffset] : null;
}
/**
* Iterator - Returns the current element
*
* @return Bookmark corresponding to the current position
*/
public function current()
{
return $this[$this->keys[$this->position]];
}
/**
* Iterator - Returns the key of the current element
*
* @return int Bookmark ID corresponding to the current position
*/
public function key()
{
return $this->keys[$this->position];
}
/**
* Iterator - Moves forward to next element
*/
public function next()
{
++$this->position;
}
/**
* Iterator - Rewinds the Iterator to the first element
*
* Entries are sorted by date (latest first)
*/
public function rewind()
{
$this->keys = array_keys($this->ids);
$this->position = 0;
}
/**
* Iterator - Checks if current position is valid
*
* @return bool true if the current Bookmark ID exists, false otherwise
*/
public function valid()
{
return isset($this->keys[$this->position]);
}
/**
* Returns a bookmark offset in bookmarks array from its unique ID.
*
* @param int $id Persistent ID of a bookmark.
*
* @return int Real offset in local array, or null if doesn't exist.
*/
protected function getBookmarkOffset($id)
{
if (isset($this->ids[$id])) {
return $this->ids[$id];
}
return null;
}
/**
* Return the next key for bookmark creation.
* E.g. If the last ID is 597, the next will be 598.
*
* @return int next ID.
*/
public function getNextId()
{
if (!empty($this->ids)) {
return max(array_keys($this->ids)) + 1;
}
return 0;
}
/**
* @param $url
*
* @return Bookmark|null
*/
public function getByUrl($url)
{
if (! empty($url)
&& isset($this->urls[$url])
&& isset($this->bookmarks[$this->urls[$url]])
) {
return $this->bookmarks[$this->urls[$url]];
}
return null;
}
/**
* Reorder links by creation date (newest first).
*
* Also update the urls and ids mapping arrays.
*
* @param string $order ASC|DESC
*/
public function reorder($order = 'DESC')
{
$order = $order === 'ASC' ? -1 : 1;
// Reorder array by dates.
usort($this->bookmarks, function ($a, $b) use ($order) {
/** @var $a Bookmark */
/** @var $b Bookmark */
if ($a->isSticky() !== $b->isSticky()) {
return $a->isSticky() ? -1 : 1;
}
return $a->getCreated() < $b->getCreated() ? 1 * $order : -1 * $order;
});
$this->urls = [];
$this->ids = [];
foreach ($this->bookmarks as $key => $bookmark) {
$this->urls[$bookmark->getUrl()] = $key;
$this->ids[$bookmark->getId()] = $key;
}
}
}
|
