-
Notifications
You must be signed in to change notification settings - Fork 179
/
query-builder.go
215 lines (178 loc) · 5.34 KB
/
query-builder.go
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
/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells 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.
*
* Pydio Cells 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 Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package sql
import (
"fmt"
"github.com/doug-martin/goqu/v9/exp"
"strings"
goqu "github.com/doug-martin/goqu/v9"
_ "github.com/doug-martin/goqu/v9/dialect/mysql"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"github.com/pydio/cells/v4/common/proto/service"
)
// Expressioner ...
type Expressioner interface {
Expression(driver string) goqu.Expression
}
// ExpressionConverter ...
type ExpressionConverter interface {
Convert(sub *anypb.Any, driver string) (goqu.Expression, bool)
}
type queryBuilder struct {
enquirer Enquirer
converters []ExpressionConverter
wheres []goqu.Expression
}
// NewQueryBuilder generates SQL request from object
func NewQueryBuilder(e Enquirer, c ...ExpressionConverter) Expressioner {
return &queryBuilder{
enquirer: e,
converters: c,
}
}
// Expression recursively builds a goku.Expression using dedicated converters
func (qb *queryBuilder) Expression(driver string) (ex goqu.Expression) {
for _, subQ := range qb.enquirer.GetSubQueries() {
sub := new(service.Query)
if e := anypb.UnmarshalTo(subQ, sub, proto.UnmarshalOptions{}); e == nil {
expression := NewQueryBuilder(sub, qb.converters...).Expression(driver)
if expression != nil {
qb.wheres = append(qb.wheres, expression)
}
} else {
for _, converter := range qb.converters {
if ex, ok := converter.Convert(subQ, driver); ok && ex != nil {
qb.wheres = append(qb.wheres, ex)
}
}
}
}
if len(qb.wheres) == 0 {
return nil
}
if qb.enquirer.GetOperation() == service.OperationType_AND {
return goqu.And(qb.wheres...)
} else {
return goqu.Or(qb.wheres...)
}
}
// QueryStringFromExpression finally builds a full SELECT from a Goqu Expression
func QueryStringFromExpression(tableName string, driver string, e Enquirer, ex goqu.Expression, resourceExpression goqu.Expression, limit int64) (string, []interface{}, error) {
db := goqu.New(driver, nil)
if resourceExpression != nil {
if ex != nil {
ex = goqu.And(ex, resourceExpression)
} else {
ex = resourceExpression
}
}
dataset := db.From(tableName).Prepared(true)
if ex != nil {
dataset = dataset.Where(ex)
}
if e.GetLimit() > 0 {
limit = e.GetLimit()
}
if limit > -1 {
offset := int64(0)
if e.GetOffset() > 0 {
offset = e.GetOffset()
}
dataset = dataset.Offset(uint(offset)).Limit(uint(limit))
}
queryString, args, err := dataset.ToSQL()
return queryString, args, err
}
// CountStringFromExpression finally builds a full SELECT count(*) from a Goqu Expression
func CountStringFromExpression(tableName string, columnCount string, driver string, e Enquirer, ex goqu.Expression, resourceExpression goqu.Expression) (string, []interface{}, error) {
db := goqu.New(driver, nil)
if resourceExpression != nil {
if ex != nil {
ex = goqu.And(ex, resourceExpression)
} else {
ex = resourceExpression
}
}
dataset := db.From(tableName).Select(goqu.COUNT(columnCount))
if ex != nil {
dataset = dataset.Where(ex)
}
queryString, args, err := dataset.ToSQL()
return queryString, args, err
}
// DeleteStringFromExpression creates sql for DELETE FROM expression
func DeleteStringFromExpression(tableName string, driver string, ex goqu.Expression) (string, []interface{}, error) {
if ex == nil {
return "", nil, fmt.Errorf("empty condition for delete, query is too broad")
}
db := goqu.New(driver, nil)
sql, args, e := db.From(tableName).Prepared(true).Where(ex).Delete().ToSQL()
return sql, args, e
}
// GetExpressionForString creates correct goqu.Expression for field + string value
func GetExpressionForString(neq bool, field interface{}, values ...string) (expression goqu.Expression) {
var gf exp.IdentifierExpression
if i, o := field.(exp.IdentifierExpression); o {
gf = i
} else {
gf = goqu.C(field.(string))
}
if len(values) > 1 {
var dedup []string
already := make(map[string]struct{})
for _, s := range values {
if _, f := already[s]; f {
continue
}
dedup = append(dedup, s)
already[s] = struct{}{}
}
if len(dedup) == 1 {
if neq {
expression = gf.Neq(dedup[0])
} else {
expression = gf.Eq(dedup[0])
}
} else {
if neq {
expression = gf.NotIn(dedup)
} else {
expression = gf.In(dedup)
}
}
} else if len(values) == 1 {
v := values[0]
if strings.Contains(v, "*") {
if neq {
expression = gf.NotILike(strings.Replace(v, "*", "%", -1))
} else {
expression = gf.ILike(strings.Replace(v, "*", "%", -1))
}
} else {
if neq {
expression = gf.Neq(v)
} else {
expression = gf.Eq(v)
}
}
}
return
}