|
1
|
|
|
<?php declare(strict_types=1); |
|
2
|
|
|
/** |
|
3
|
|
|
* Created by Vitaly Iegorov <[email protected]>. |
|
4
|
|
|
* on 06.04.17 at 07:30 |
|
5
|
|
|
*/ |
|
6
|
|
|
namespace samsonframework\stringconditiontree\string; |
|
7
|
|
|
|
|
8
|
|
|
/** |
|
9
|
|
|
* This class describes string character group structure(CGS). |
|
10
|
|
|
* |
|
11
|
|
|
* @author Vitaly Egorov <[email protected]> |
|
12
|
|
|
*/ |
|
13
|
|
|
class Structure extends IterableStructure |
|
14
|
|
|
{ |
|
15
|
|
|
/** array Supported character group types */ |
|
16
|
|
|
const CG_TYPES = [ |
|
17
|
|
|
VariableFixedCG::class, |
|
18
|
|
|
VariableCG::class, |
|
19
|
|
|
FixedCG::class, |
|
20
|
|
|
]; |
|
21
|
|
|
|
|
22
|
|
|
/** @var string Input string */ |
|
23
|
|
|
public $string; |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* Create string character group structure from string string. |
|
27
|
|
|
* |
|
28
|
|
|
* @param string $input Input string for string character group structure |
|
29
|
|
|
*/ |
|
30
|
19 |
|
public function __construct(string $input) |
|
31
|
|
|
{ |
|
32
|
19 |
|
$this->string = $input; |
|
33
|
|
|
|
|
34
|
|
|
// Iterate until string is cleared |
|
35
|
19 |
|
while (strlen($input)) { |
|
36
|
19 |
|
foreach (self::CG_TYPES as $characterGroupType) { |
|
37
|
|
|
// Try to create character group |
|
38
|
19 |
|
if (!($group = $characterGroupType::fromString($input)) instanceof NullCG) { |
|
39
|
19 |
|
$this->groups[] = $group; |
|
40
|
|
|
// Reset CG type iterator to preserve order |
|
41
|
19 |
|
break; |
|
42
|
|
|
} |
|
43
|
|
|
} |
|
44
|
|
|
} |
|
45
|
19 |
|
} |
|
46
|
|
|
|
|
47
|
|
|
/** |
|
48
|
|
|
* Compare structure character groups. |
|
49
|
|
|
* |
|
50
|
|
|
* @param Structure $structure Compared string structure group |
|
51
|
|
|
* |
|
52
|
|
|
* @return int Comparison result |
|
53
|
|
|
*/ |
|
54
|
17 |
|
public function compare(Structure $structure): int |
|
55
|
|
|
{ |
|
56
|
17 |
|
$initialStructureSize = count($this->groups); |
|
57
|
17 |
|
$comparedStructureSize = count($structure->groups); |
|
58
|
17 |
|
$maxSize = max($initialStructureSize, $comparedStructureSize); |
|
59
|
|
|
|
|
60
|
|
|
// Iterate maximum sized structure |
|
61
|
17 |
|
for ($index = 0; $index < $maxSize; $index++) { |
|
62
|
|
|
// Get compared/initial group or last compared character group is size mismatches |
|
63
|
17 |
|
$comparedGroup = $structure->groups[$index] ?? $structure->groups[$comparedStructureSize - 1]; |
|
64
|
17 |
|
$initialGroup = $this->groups[$index] ?? $this->groups[$initialStructureSize - 1]; |
|
65
|
|
|
|
|
66
|
|
|
// Define if character group with higher priority |
|
67
|
17 |
|
if (($return = $initialGroup->compare($comparedGroup)) !== 0) { |
|
68
|
15 |
|
return $return; |
|
69
|
|
|
} |
|
70
|
|
|
} |
|
71
|
|
|
|
|
72
|
|
|
// Structures are equal |
|
73
|
3 |
|
return 0; |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
/** |
|
77
|
|
|
* Get longest common prefix between strings. |
|
78
|
|
|
* |
|
79
|
|
|
* @param Structure $compared Compared character group structure |
|
80
|
|
|
* |
|
81
|
|
|
* @return string Strings Longest common prefix or empty string |
|
82
|
|
|
* |
|
83
|
|
|
*/ |
|
84
|
2 |
|
public function getCommonPrefix(Structure $compared) |
|
85
|
|
|
{ |
|
86
|
2 |
|
$longestPrefix = ''; |
|
87
|
|
|
|
|
88
|
|
|
/** @var AbstractCG $group Iterate longest structure character groups */ |
|
89
|
2 |
|
foreach ($this->getShortestStructure($compared) as $index => $group) { |
|
90
|
2 |
|
$initialGroup = $this->groups[$index]; |
|
91
|
2 |
|
$comparedGroup = $compared->groups[$index]; |
|
92
|
|
|
|
|
93
|
|
|
// Get longest matching prefix between character groups. |
|
94
|
2 |
|
$prefix = $initialGroup->getCommonPrefix($comparedGroup); |
|
95
|
|
|
|
|
96
|
|
|
// Concatenate common prefix |
|
97
|
2 |
|
$longestPrefix .= $prefix; |
|
98
|
|
|
|
|
99
|
|
|
/** |
|
100
|
|
|
* If returned prefix is not equal to initial/compared character groups then it means |
|
101
|
|
|
* that it is shorter and we need to stop searching. |
|
102
|
|
|
*/ |
|
103
|
2 |
|
if ($prefix !== $initialGroup->getString() || $prefix !== $comparedGroup->getString()) { |
|
104
|
2 |
|
break; |
|
105
|
|
|
} |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
2 |
|
return $longestPrefix; |
|
109
|
|
|
} |
|
110
|
|
|
|
|
111
|
|
|
/** |
|
112
|
|
|
* Define shortest structure. |
|
113
|
|
|
* |
|
114
|
|
|
* @param Structure $compared Structure to compare |
|
115
|
|
|
* |
|
116
|
|
|
* @return Structure Shortest structure |
|
117
|
|
|
*/ |
|
118
|
2 |
|
private function getShortestStructure(Structure $compared): Structure |
|
119
|
|
|
{ |
|
120
|
|
|
|
|
121
|
2 |
|
return $this->count() < $compared->count() ? $this : $compared; |
|
122
|
|
|
} |
|
123
|
|
|
} |
|
124
|
|
|
|
samsonframework /
string-condition-tree
