File size: 2,450 Bytes
fea99b3 | 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 | package models
import (
"fmt"
"strings"
)
type FieldExpression interface {
fmt.Stringer
JSONPathExpression() string
IsCondition() bool
}
type FieldAttrValue struct {
field string
value any
}
var _ FieldExpression = (*FieldAttrValue)(nil)
func (f FieldAttrValue) IsCondition() bool {
return true
}
func (f FieldAttrValue) valueString() string {
b := strings.Builder{}
switch v := f.value.(type) {
case int, int32, int64, float32, float64:
fmt.Fprintf(&b, "%v", v)
case string:
b.WriteString(v)
case fmt.Stringer:
b.WriteString(v.String())
default:
b.WriteString("!UNSUPPORTED")
}
return b.String()
}
func (f FieldAttrValue) String() string {
return f.field + "=" + f.valueString()
}
func (f FieldAttrValue) JSONPathExpression() string {
b := strings.Builder{}
b.WriteString("@.")
b.WriteString(f.field)
b.WriteString("=='")
b.WriteString(f.valueString())
b.WriteString("'")
return b.String()
}
func NewFieldAttrValue(field string, value any) FieldAttrValue {
return FieldAttrValue{field: field, value: value}
}
type FieldArrIndex struct {
index int
}
var _ FieldExpression = (*FieldArrIndex)(nil)
func (f FieldArrIndex) IsCondition() bool {
return false
}
func (f FieldArrIndex) String() string {
return fmt.Sprintf("%d", f.index)
}
func (f FieldArrIndex) JSONPathExpression() string {
return fmt.Sprintf("%d", f.index)
}
func NewFieldArrIndex(index int) FieldArrIndex {
return FieldArrIndex{index: index}
}
type MultiFieldAttrValue struct {
values []FieldAttrValue
}
func (m MultiFieldAttrValue) IsCondition() bool {
return true
}
func (m MultiFieldAttrValue) String() string {
b := strings.Builder{}
for idx, attr := range m.values {
if idx > 0 {
b.WriteString(", ")
}
b.WriteString(attr.String())
}
return b.String()
}
func (m MultiFieldAttrValue) JSONPathExpression() string {
b := strings.Builder{}
if len(m.values) > 0 {
for idx, attr := range m.values {
if idx > 0 {
b.WriteString(" && ")
}
b.WriteString(attr.JSONPathExpression())
}
}
return b.String()
}
func NewMultiFieldAttrValue(values ...FieldAttrValue) MultiFieldAttrValue {
return MultiFieldAttrValue{values: values}
}
var _ FieldExpression = (*wildCard)(nil)
var WildCard = wildCard{}
type wildCard struct{}
func (w wildCard) IsCondition() bool {
return false
}
func (w wildCard) String() string {
return ""
}
func (w wildCard) JSONPathExpression() string {
return "*"
}
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