|
1
|
|
|
package it |
|
2
|
|
|
|
|
3
|
|
|
import ( |
|
4
|
|
|
"fmt" |
|
5
|
|
|
"strings" |
|
6
|
|
|
|
|
7
|
|
|
"github.com/muonsoft/validation" |
|
8
|
|
|
"github.com/muonsoft/validation/code" |
|
9
|
|
|
"github.com/muonsoft/validation/message" |
|
10
|
|
|
) |
|
11
|
|
|
|
|
12
|
|
|
// ChoiceConstraint is used to ensure that the given value corresponds to one of the expected choices. |
|
13
|
|
|
type ChoiceConstraint[T comparable] struct { |
|
14
|
|
|
blank T |
|
15
|
|
|
choices map[T]bool |
|
16
|
|
|
choicesValue string |
|
17
|
|
|
groups []string |
|
18
|
|
|
code string |
|
19
|
|
|
messageTemplate string |
|
20
|
|
|
messageParameters validation.TemplateParameterList |
|
21
|
|
|
isIgnored bool |
|
22
|
|
|
} |
|
23
|
|
|
|
|
24
|
1 |
|
// IsOneOf creates a ChoiceConstraint for checking that values are in the expected list of values. |
|
25
|
1 |
|
func IsOneOf[T comparable](values ...T) ChoiceConstraint[T] { |
|
26
|
1 |
|
choices := make(map[T]bool, len(values)) |
|
27
|
|
|
for _, value := range values { |
|
28
|
|
|
choices[value] = true |
|
29
|
1 |
|
} |
|
30
|
|
|
|
|
31
|
|
|
s := strings.Builder{} |
|
32
|
|
|
for i, value := range values { |
|
33
|
|
|
if i > 0 { |
|
34
|
|
|
s.WriteString(", ") |
|
35
|
|
|
} |
|
36
|
|
|
s.WriteString(fmt.Sprint(value)) |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
1 |
|
return ChoiceConstraint[T]{ |
|
40
|
1 |
|
choices: choices, |
|
41
|
|
|
choicesValue: s.String(), |
|
42
|
|
|
code: code.NoSuchChoice, |
|
43
|
1 |
|
messageTemplate: message.Templates[code.NoSuchChoice], |
|
44
|
|
|
} |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
|
|
// Code overrides default code for produced violation. |
|
48
|
1 |
|
func (c ChoiceConstraint[T]) Code(code string) ChoiceConstraint[T] { |
|
49
|
|
|
c.code = code |
|
50
|
|
|
return c |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
1 |
|
// Message sets the violation message template. You can set custom template parameters |
|
54
|
1 |
|
// for injecting its values into the final message. Also, you can use default parameters: |
|
55
|
|
|
// |
|
56
|
|
|
// {{ choices }} - a comma-separated list of available choices; |
|
57
|
|
|
// {{ value }} - the current (invalid) value. |
|
58
|
|
|
func (c ChoiceConstraint[T]) Message(template string, parameters ...validation.TemplateParameter) ChoiceConstraint[T] { |
|
59
|
|
|
c.messageTemplate = template |
|
60
|
|
|
c.messageParameters = parameters |
|
61
|
|
|
return c |
|
62
|
|
|
} |
|
63
|
1 |
|
|
|
64
|
1 |
|
// When enables conditional validation of this constraint. If the expression evaluates to false, |
|
65
|
1 |
|
// then the constraint will be ignored. |
|
66
|
|
|
func (c ChoiceConstraint[T]) When(condition bool) ChoiceConstraint[T] { |
|
67
|
|
|
c.isIgnored = !condition |
|
68
|
|
|
return c |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
1 |
|
// WhenGroups enables conditional validation of the constraint by using the validation groups. |
|
72
|
1 |
|
func (c ChoiceConstraint[T]) WhenGroups(groups ...string) ChoiceConstraint[T] { |
|
73
|
|
|
c.groups = groups |
|
74
|
|
|
return c |
|
75
|
|
|
} |
|
76
|
|
|
|
|
77
|
1 |
|
func (c ChoiceConstraint[T]) ValidateComparable(value *T, scope validation.Scope) error { |
|
78
|
1 |
|
if len(c.choices) == 0 { |
|
79
|
|
|
return scope.NewConstraintError("ChoiceConstraint", "empty list of choices") |
|
80
|
|
|
} |
|
81
|
|
|
if c.isIgnored || scope.IsIgnored(c.groups...) || value == nil || *value == c.blank { |
|
82
|
1 |
|
return nil |
|
83
|
1 |
|
} |
|
84
|
|
|
if c.choices[*value] { |
|
85
|
1 |
|
return nil |
|
86
|
1 |
|
} |
|
87
|
|
|
|
|
88
|
|
|
return scope. |
|
89
|
1 |
|
BuildViolation(c.code, c.messageTemplate). |
|
90
|
|
|
SetParameters( |
|
91
|
|
|
c.messageParameters.Prepend( |
|
92
|
|
|
validation.TemplateParameter{Key: "{{ value }}", Value: fmt.Sprint(*value)}, |
|
93
|
|
|
validation.TemplateParameter{Key: "{{ choices }}", Value: c.choicesValue}, |
|
94
|
|
|
)..., |
|
95
|
|
|
). |
|
96
|
|
|
CreateViolation() |
|
97
|
|
|
} |
|
98
|
|
|
|
muonsoft /
validation
