|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* Phossa Project |
|
4
|
|
|
* |
|
5
|
|
|
* PHP version 5.4 |
|
6
|
|
|
* |
|
7
|
|
|
* @category Library |
|
8
|
|
|
* @package Phossa2\Shared |
|
9
|
|
|
* @copyright Copyright (c) 2016 phossa.com |
|
10
|
|
|
* @license http://mit-license.org/ MIT License |
|
11
|
|
|
* @link http://www.phossa.com/ |
|
12
|
|
|
*/ |
|
13
|
|
|
/*# declare(strict_types=1); */ |
|
14
|
|
|
|
|
15
|
|
|
namespace Phossa2\Shared\Reference; |
|
16
|
|
|
|
|
17
|
|
|
use Phossa2\Shared\Message\Message; |
|
18
|
|
|
use Phossa2\Shared\Cache\LocalCacheTrait; |
|
19
|
|
|
use Phossa2\Shared\Exception\RuntimeException; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* ReferenceTrait |
|
23
|
|
|
* |
|
24
|
|
|
* Provides reference & dereference methods |
|
25
|
|
|
* |
|
26
|
|
|
* @package Phossa2\Shared |
|
27
|
|
|
* @author Hong Zhang <[email protected]> |
|
28
|
|
|
* @see ReferenceInterface |
|
29
|
|
|
* @version 2.0.8 |
|
30
|
|
|
* @since 2.0.4 added |
|
31
|
|
|
* @since 2.0.6 added reference cache support |
|
32
|
|
|
* @since 2.0.8 added delegator support, changed to LocaclCache |
|
33
|
|
|
*/ |
|
34
|
|
|
trait ReferenceTrait |
|
35
|
|
|
{ |
|
36
|
|
|
use LocalCacheTrait; |
|
37
|
|
|
|
|
38
|
|
|
/** |
|
39
|
|
|
* refernece start chars |
|
40
|
|
|
* |
|
41
|
|
|
* @var string |
|
42
|
|
|
* @access private |
|
43
|
|
|
*/ |
|
44
|
|
|
private $ref_start = '${'; |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* reference ending chars |
|
48
|
|
|
* |
|
49
|
|
|
* @var string |
|
50
|
|
|
* @access private |
|
51
|
|
|
*/ |
|
52
|
|
|
private $ref_end = '}'; |
|
53
|
|
|
|
|
54
|
|
|
/** |
|
55
|
|
|
* cached pattern to match |
|
56
|
|
|
* |
|
57
|
|
|
* @var string |
|
58
|
|
|
* @access private |
|
59
|
|
|
*/ |
|
60
|
|
|
private $ref_pattern = '~(\$\{((?:(?!\$\{|\}).)+?)\})~'; |
|
61
|
|
|
|
|
62
|
|
|
/** |
|
63
|
|
|
* {@inheritDoc} |
|
64
|
|
|
*/ |
|
65
|
|
|
public function setReferencePattern( |
|
66
|
|
|
/*# string */ $start, |
|
67
|
|
|
/*# string */ $end |
|
68
|
|
|
) { |
|
69
|
|
|
$this->ref_start = $start; |
|
70
|
|
|
$this->ref_end = $end; |
|
71
|
|
|
|
|
72
|
|
|
// build pattern on the fly |
|
73
|
|
|
$s = preg_quote($start); |
|
74
|
|
|
$e = preg_quote($end); |
|
75
|
|
|
$this->ref_pattern = sprintf( |
|
76
|
|
|
"~(%s((?:(?!%s|%s).)+?)%s)~", $s, $s, $e, $e |
|
77
|
|
|
); |
|
78
|
|
|
|
|
79
|
|
|
return $this->clearLocalCache(); |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
|
|
/** |
|
83
|
|
|
* {@inheritDoc} |
|
84
|
|
|
*/ |
|
85
|
|
|
public function hasReference( |
|
86
|
|
|
/*# string */ $subject, |
|
87
|
|
|
array &$matched |
|
88
|
|
|
)/*# : bool */ { |
|
89
|
|
|
if (is_string($subject) && |
|
90
|
|
|
false !== strpos($subject, $this->ref_start) && |
|
91
|
|
|
preg_match($this->ref_pattern, $subject, $matched) |
|
92
|
|
|
) { |
|
93
|
|
|
return true; |
|
94
|
|
|
} |
|
95
|
|
|
return false; |
|
96
|
|
|
} |
|
97
|
|
|
|
|
98
|
|
|
/** |
|
99
|
|
|
* {@inheritDoc} |
|
100
|
|
|
*/ |
|
101
|
|
|
public function deReference(/*# string */ $subject) |
|
102
|
|
|
{ |
|
103
|
|
|
$loop = 0; |
|
104
|
|
|
$matched = []; |
|
105
|
|
|
|
|
106
|
|
|
// recursively dereference in the string $subject |
|
107
|
|
|
while ($this->hasReference($subject, $matched)) { |
|
108
|
|
|
// avoid looping |
|
109
|
|
|
$this->checkReferenceLoop($loop++, $matched[2]); |
|
110
|
|
|
|
|
111
|
|
|
// resolve the reference to a value |
|
112
|
|
|
$val = $this->resolveReference($matched[2]); |
|
113
|
|
|
|
|
114
|
|
|
// value is another string |
|
115
|
|
|
if (is_string($val)) { |
|
116
|
|
|
$subject = str_replace($matched[1], $val, $subject); |
|
117
|
|
|
|
|
118
|
|
|
// value is an array, object, null etc. |
|
119
|
|
|
} else { |
|
120
|
|
|
return $this->checkValue($val, $subject, $matched[1]); |
|
121
|
|
|
} |
|
122
|
|
|
} |
|
123
|
|
|
return $subject; |
|
124
|
|
|
} |
|
125
|
|
|
|
|
126
|
|
|
/** |
|
127
|
|
|
* {@inheritDoc} |
|
128
|
|
|
*/ |
|
129
|
|
|
public function deReferenceArray(&$dataArray) |
|
130
|
|
|
{ |
|
131
|
|
|
if (is_string($dataArray)) { |
|
132
|
|
|
$dataArray = $this->deReference($dataArray); |
|
133
|
|
|
} |
|
134
|
|
|
|
|
135
|
|
|
if (!is_array($dataArray)) { |
|
136
|
|
|
return; |
|
137
|
|
|
} |
|
138
|
|
|
|
|
139
|
|
|
foreach ($dataArray as &$data) { |
|
140
|
|
|
$this->dereferenceArray($data); |
|
141
|
|
|
} |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* Check dereferenced value |
|
146
|
|
|
* |
|
147
|
|
|
* @param mixed $value |
|
148
|
|
|
* @param string $subject the subject to dereference |
|
149
|
|
|
* @param string $reference the matched whole reference |
|
150
|
|
|
* @return mixed |
|
151
|
|
|
* @throws RuntimeException if $subject malformed, like mix string & array |
|
152
|
|
|
* @access private |
|
153
|
|
|
*/ |
|
154
|
|
|
private function checkValue( |
|
155
|
|
|
$value, |
|
156
|
|
|
/*# string */ $subject, |
|
157
|
|
|
/*# string */ $reference |
|
158
|
|
|
) { |
|
159
|
|
|
// unknown reference found, leave it alone |
|
160
|
|
|
if (is_null($value)) { |
|
161
|
|
|
// exception thrown in resolveUnknown() already if wanted to |
|
162
|
|
|
return $subject; |
|
163
|
|
|
|
|
164
|
|
|
// malformed partial match, partial string, partial non-scalar |
|
165
|
|
|
} elseif ($subject != $reference) { |
|
166
|
|
|
throw new RuntimeException( |
|
167
|
|
|
Message::get(Message::MSG_REF_MALFORMED, $reference), |
|
168
|
|
|
Message::MSG_REF_MALFORMED |
|
169
|
|
|
); |
|
170
|
|
|
|
|
171
|
|
|
// full match, array or object |
|
172
|
|
|
} else { |
|
173
|
|
|
return $value; |
|
174
|
|
|
} |
|
175
|
|
|
} |
|
176
|
|
|
|
|
177
|
|
|
/** |
|
178
|
|
|
* Resolve the reference $name |
|
179
|
|
|
* |
|
180
|
|
|
* @param string $name |
|
181
|
|
|
* @return mixed |
|
182
|
|
|
* @throws RuntimeException if reference unknown |
|
183
|
|
|
* @access private |
|
184
|
|
|
* @since 2.0.6 added cache support |
|
185
|
|
|
* @since 2.0.8 added delegatorAware support |
|
186
|
|
|
*/ |
|
187
|
|
|
private function resolveReference(/*# string */ $name) |
|
188
|
|
|
{ |
|
189
|
|
|
// try reference cache first |
|
190
|
|
|
if ($this->hasLocalCache($name)) { |
|
191
|
|
|
return $this->getLocalCache($name); |
|
192
|
|
|
} |
|
193
|
|
|
|
|
194
|
|
|
// lookup the reference |
|
195
|
|
|
$val = $this->referenceLookup($name); |
|
196
|
|
|
|
|
197
|
|
|
// dealing with unknown reference |
|
198
|
|
|
if (is_null($val)) { |
|
199
|
|
|
$val = $this->resolveUnknown($name); |
|
200
|
|
|
} |
|
201
|
|
|
|
|
202
|
|
|
// cache deref result |
|
203
|
|
|
$this->setLocalCache($name, $val); |
|
204
|
|
|
|
|
205
|
|
|
return $val; |
|
206
|
|
|
} |
|
207
|
|
|
|
|
208
|
|
|
/** |
|
209
|
|
|
* Throw exception if looped |
|
210
|
|
|
* |
|
211
|
|
|
* @param int $loop loop counter |
|
212
|
|
|
* @param string $name reference name |
|
213
|
|
|
* @throws RuntimeException if loop found |
|
214
|
|
|
* @access private |
|
215
|
|
|
* @since 2.0.6 |
|
216
|
|
|
*/ |
|
217
|
|
|
private function checkReferenceLoop( |
|
218
|
|
|
/*# int */ $loop, |
|
219
|
|
|
/*# string */ $name |
|
220
|
|
|
) { |
|
221
|
|
|
if ($loop > 20) { |
|
222
|
|
|
throw new RuntimeException( |
|
223
|
|
|
Message::get(Message::MSG_REF_LOOP, $name), |
|
224
|
|
|
Message::MSG_REF_LOOP |
|
225
|
|
|
); |
|
226
|
|
|
} |
|
227
|
|
|
} |
|
228
|
|
|
|
|
229
|
|
|
/** |
|
230
|
|
|
* Lookup reference with delegator or self |
|
231
|
|
|
* |
|
232
|
|
|
* @param string $name |
|
233
|
|
|
* @return mixed |
|
234
|
|
|
* @access private |
|
235
|
|
|
*/ |
|
236
|
|
|
private function referenceLookup(/*# string */ $name) |
|
237
|
|
|
{ |
|
238
|
|
|
// try delegator |
|
239
|
|
|
if ($this instanceof DelegatorAwareInterface && |
|
240
|
|
|
$this->hasDelegator() |
|
241
|
|
|
) { |
|
242
|
|
|
/* @var $delegator DelegatorInterface */ |
|
243
|
|
|
$delegator = $this->getDelegator(); |
|
244
|
|
|
|
|
245
|
|
|
if ($delegator->hasInLookup($name)) { |
|
246
|
|
|
$val = $delegator->getFromLookup($name); |
|
247
|
|
|
} else { |
|
248
|
|
|
$val = null; |
|
249
|
|
|
} |
|
250
|
|
|
|
|
251
|
|
|
// try self |
|
252
|
|
|
} else { |
|
253
|
|
|
$val = $this->getReference($name); |
|
254
|
|
|
} |
|
255
|
|
|
|
|
256
|
|
|
return $val; |
|
257
|
|
|
} |
|
258
|
|
|
|
|
259
|
|
|
/** |
|
260
|
|
|
* For unknown reference $name, normally returns NULL |
|
261
|
|
|
* |
|
262
|
|
|
* @param string $name |
|
263
|
|
|
* @return mixed |
|
264
|
|
|
* @throws \Exception if implementor WANTS TO !! |
|
265
|
|
|
* @access protected |
|
266
|
|
|
*/ |
|
267
|
|
|
abstract protected function resolveUnknown(/*# string */ $name); |
|
268
|
|
|
|
|
269
|
|
|
/** |
|
270
|
|
|
* The REAL resolving method. return NULL for unknown reference |
|
271
|
|
|
* |
|
272
|
|
|
* @param string $name |
|
273
|
|
|
* @return mixed |
|
274
|
|
|
* @access protected |
|
275
|
|
|
*/ |
|
276
|
|
|
abstract protected function getReference(/*# string */ $name); |
|
277
|
|
|
} |
|
278
|
|
|
|
phossa2 /
shared
