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
|
<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Files\Cache;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\Files\IMimeTypeLoader;
use OCP\Files\Search\ISearchBinaryOperator;
use OCP\Files\Search\ISearchComparison;
use OCP\Files\Search\ISearchOperator;
use OCP\Files\Search\ISearchOrder;
/**
* Tools for transforming search queries into database queries
*/
class QuerySearchHelper {
static protected $searchOperatorMap = [
ISearchComparison::COMPARE_LIKE => 'iLike',
ISearchComparison::COMPARE_EQUAL => 'eq',
ISearchComparison::COMPARE_GREATER_THAN => 'gt',
ISearchComparison::COMPARE_GREATER_THAN_EQUAL => 'gte',
ISearchComparison::COMPARE_LESS_THAN => 'lt',
ISearchComparison::COMPARE_LESS_THAN_EQUAL => 'lte'
];
static protected $searchOperatorNegativeMap = [
ISearchComparison::COMPARE_LIKE => 'notLike',
ISearchComparison::COMPARE_EQUAL => 'neq',
ISearchComparison::COMPARE_GREATER_THAN => 'lte',
ISearchComparison::COMPARE_GREATER_THAN_EQUAL => 'lt',
ISearchComparison::COMPARE_LESS_THAN => 'gte',
ISearchComparison::COMPARE_LESS_THAN_EQUAL => 'lt'
];
const TAG_FAVORITE = '_$!<Favorite>!$_';
/** @var IMimeTypeLoader */
private $mimetypeLoader;
/**
* QuerySearchUtil constructor.
*
* @param IMimeTypeLoader $mimetypeLoader
*/
public function __construct(IMimeTypeLoader $mimetypeLoader) {
$this->mimetypeLoader = $mimetypeLoader;
}
/**
* Whether or not the tag tables should be joined to complete the search
*
* @param ISearchOperator $operator
* @return boolean
*/
public function shouldJoinTags(ISearchOperator $operator) {
if ($operator instanceof ISearchBinaryOperator) {
return array_reduce($operator->getArguments(), function ($shouldJoin, ISearchOperator $operator) {
return $shouldJoin || $this->shouldJoinTags($operator);
}, false);
} else if ($operator instanceof ISearchComparison) {
return $operator->getField() === 'tagname' || $operator->getField() === 'favorite';
}
return false;
}
public function searchOperatorToDBExpr(IQueryBuilder $builder, ISearchOperator $operator) {
$expr = $builder->expr();
if ($operator instanceof ISearchBinaryOperator) {
switch ($operator->getType()) {
case ISearchBinaryOperator::OPERATOR_NOT:
$negativeOperator = $operator->getArguments()[0];
if ($negativeOperator instanceof ISearchComparison) {
return $this->searchComparisonToDBExpr($builder, $negativeOperator, self::$searchOperatorNegativeMap);
} else {
throw new \InvalidArgumentException('Binary operators inside "not" is not supported');
}
case ISearchBinaryOperator::OPERATOR_AND:
return $expr->andX($this->searchOperatorToDBExpr($builder, $operator->getArguments()[0]), $this->searchOperatorToDBExpr($builder, $operator->getArguments()[1]));
case ISearchBinaryOperator::OPERATOR_OR:
return $expr->orX($this->searchOperatorToDBExpr($builder, $operator->getArguments()[0]), $this->searchOperatorToDBExpr($builder, $operator->getArguments()[1]));
default:
throw new \InvalidArgumentException('Invalid operator type: ' . $operator->getType());
}
} else if ($operator instanceof ISearchComparison) {
return $this->searchComparisonToDBExpr($builder, $operator, self::$searchOperatorMap);
} else {
throw new \InvalidArgumentException('Invalid operator type: ' . get_class($operator));
}
}
private function searchComparisonToDBExpr(IQueryBuilder $builder, ISearchComparison $comparison, array $operatorMap) {
$this->validateComparison($comparison);
list($field, $value, $type) = $this->getOperatorFieldAndValue($comparison);
if (isset($operatorMap[$type])) {
$queryOperator = $operatorMap[$type];
return $builder->expr()->$queryOperator($field, $this->getParameterForValue($builder, $value));
} else {
throw new \InvalidArgumentException('Invalid operator type: ' . $comparison->getType());
}
}
private function getOperatorFieldAndValue(ISearchComparison $operator) {
$field = $operator->getField();
$value = $operator->getValue();
$type = $operator->getType();
if ($field === 'mimetype') {
if ($operator->getType() === ISearchComparison::COMPARE_EQUAL) {
$value = $this->mimetypeLoader->getId($value);
} else if ($operator->getType() === ISearchComparison::COMPARE_LIKE) {
// transform "mimetype='foo/%'" to "mimepart='foo'"
if (preg_match('|(.+)/%|', $value, $matches)) {
$field = 'mimepart';
$value = $this->mimetypeLoader->getId($matches[1]);
$type = ISearchComparison::COMPARE_EQUAL;
}
if (strpos($value, '%') !== false) {
throw new \InvalidArgumentException('Unsupported query value for mimetype: ' . $value . ', only values in the format "mime/type" or "mime/%" are supported');
}
}
} else if ($field === 'favorite') {
$field = 'tag.category';
$value = self::TAG_FAVORITE;
} else if ($field === 'tagname') {
$field = 'tag.category';
}
return [$field, $value, $type];
}
private function validateComparison(ISearchComparison $operator) {
$types = [
'mimetype' => 'string',
'mtime' => 'integer',
'name' => 'string',
'size' => 'integer',
'tagname' => 'string',
'favorite' => 'boolean',
'fileid' => 'integer'
];
$comparisons = [
'mimetype' => ['eq', 'like'],
'mtime' => ['eq', 'gt', 'lt', 'gte', 'lte'],
'name' => ['eq', 'like'],
'size' => ['eq', 'gt', 'lt', 'gte', 'lte'],
'tagname' => ['eq', 'like'],
'favorite' => ['eq'],
'fileid' => ['eq']
];
if (!isset($types[$operator->getField()])) {
throw new \InvalidArgumentException('Unsupported comparison field ' . $operator->getField());
}
$type = $types[$operator->getField()];
if (gettype($operator->getValue()) !== $type) {
throw new \InvalidArgumentException('Invalid type for field ' . $operator->getField());
}
if (!in_array($operator->getType(), $comparisons[$operator->getField()])) {
throw new \InvalidArgumentException('Unsupported comparison for field ' . $operator->getField() . ': ' . $operator->getType());
}
}
private function getParameterForValue(IQueryBuilder $builder, $value) {
if ($value instanceof \DateTime) {
$value = $value->getTimestamp();
}
if (is_numeric($value)) {
$type = IQueryBuilder::PARAM_INT;
} else {
$type = IQueryBuilder::PARAM_STR;
}
return $builder->createNamedParameter($value, $type);
}
/**
* @param IQueryBuilder $query
* @param ISearchOrder[] $orders
*/
public function addSearchOrdersToQuery(IQueryBuilder $query, array $orders) {
foreach ($orders as $order) {
$query->addOrderBy($order->getField(), $order->getDirection());
}
}
}
|