/
filters.go
76 lines (65 loc) · 2.15 KB
/
filters.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
package ddbmoose
import (
"errors"
"fmt"
"strconv"
"strings"
"github.com/aws/aws-sdk-go-v2/feature/dynamodb/expression"
)
func generateExpression(filters *[]DdbMooseFilter) (*expression.Expression, error) {
var filtersScan expression.ConditionBuilder
for _, filter := range *filters {
switch filter.LogicalOperator {
case TloAnd:
filtersScan = filtersScan.And(generateFilterScan(filter))
case TloOr:
filtersScan = filtersScan.Or(generateFilterScan(filter))
case TloNone:
filtersScan = generateFilterScan(filter)
default:
return nil, errors.New("invalid logical operator type")
}
}
result, failed := expression.NewBuilder().WithFilter(filtersScan).Build()
return &result, failed
}
func generateFilterScan(filter DdbMooseFilter) expression.ConditionBuilder {
switch filter.Operation {
case TfrEqual:
return expression.Name(filter.Field).Equal(expression.Value(filter.Value))
case TfrNotEqual:
return expression.Name(filter.Field).NotEqual(expression.Value(filter.Value))
case TfrContains:
return expression.Name(filter.Field).Contains(fmt.Sprint(filter.Value))
case TfrBeginsWith:
return expression.Name(filter.Field).BeginsWith(fmt.Sprint(filter.Value))
case TfrGreaterThan:
return expression.Name(filter.Field).GreaterThan(expression.Value(filter.Value))
case TfrGreaterThanEqual:
return expression.Name(filter.Field).GreaterThanEqual(expression.Value(filter.Value))
case TfrLessThan:
return expression.Name(filter.Field).LessThan(expression.Value(filter.Value))
case TfrLessThanEqual:
return expression.Name(filter.Field).LessThanEqual(expression.Value(filter.Value))
case TfrBetween:
list := strings.Split(fmt.Sprint(filter.Value), ",")
listInt := listStringToListInt(list)
return expression.Name(filter.Field).Between(expression.Value(listInt[0]), expression.Value(listInt[1]))
default:
return expression.ConditionBuilder{}
}
}
func listStringToListInt(list []string) [2]int64 {
var listInt [2]int64
for count, item := range list {
if count < 2 {
inte, failed := strconv.ParseInt(item, 6, 12)
if failed != nil {
listInt[count] = 0
} else {
listInt[count] = inte
}
}
}
return listInt
}