File: validators.go

package info (click to toggle)
golang-github-revel-revel 0.12.0+dfsg-4
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 828 kB
  • sloc: xml: 7; makefile: 4
file content (209 lines) | stat: -rw-r--r-- 3,753 bytes parent folder | download | duplicates (2)
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
package revel

import (
	"fmt"
	"reflect"
	"regexp"
	"time"
)

type Validator interface {
	IsSatisfied(interface{}) bool
	DefaultMessage() string
}

type Required struct{}

func ValidRequired() Required {
	return Required{}
}

func (r Required) IsSatisfied(obj interface{}) bool {
	if obj == nil {
		return false
	}

	if str, ok := obj.(string); ok {
		return len(str) > 0
	}
	if b, ok := obj.(bool); ok {
		return b
	}
	if i, ok := obj.(int); ok {
		return i != 0
	}
	if t, ok := obj.(time.Time); ok {
		return !t.IsZero()
	}
	v := reflect.ValueOf(obj)
	if v.Kind() == reflect.Slice {
		return v.Len() > 0
	}
	return true
}

func (r Required) DefaultMessage() string {
	return "Required"
}

type Min struct {
	Min int
}

func ValidMin(min int) Min {
	return Min{min}
}

func (m Min) IsSatisfied(obj interface{}) bool {
	num, ok := obj.(int)
	if ok {
		return num >= m.Min
	}
	return false
}

func (m Min) DefaultMessage() string {
	return fmt.Sprintln("Minimum is", m.Min)
}

type Max struct {
	Max int
}

func ValidMax(max int) Max {
	return Max{max}
}

func (m Max) IsSatisfied(obj interface{}) bool {
	num, ok := obj.(int)
	if ok {
		return num <= m.Max
	}
	return false
}

func (m Max) DefaultMessage() string {
	return fmt.Sprintln("Maximum is", m.Max)
}

// Requires an integer to be within Min, Max inclusive.
type Range struct {
	Min
	Max
}

func ValidRange(min, max int) Range {
	return Range{Min{min}, Max{max}}
}

func (r Range) IsSatisfied(obj interface{}) bool {
	return r.Min.IsSatisfied(obj) && r.Max.IsSatisfied(obj)
}

func (r Range) DefaultMessage() string {
	return fmt.Sprintln("Range is", r.Min.Min, "to", r.Max.Max)
}

// Requires an array or string to be at least a given length.
type MinSize struct {
	Min int
}

func ValidMinSize(min int) MinSize {
	return MinSize{min}
}

func (m MinSize) IsSatisfied(obj interface{}) bool {
	if str, ok := obj.(string); ok {
		return len(str) >= m.Min
	}
	v := reflect.ValueOf(obj)
	if v.Kind() == reflect.Slice {
		return v.Len() >= m.Min
	}
	return false
}

func (m MinSize) DefaultMessage() string {
	return fmt.Sprintln("Minimum size is", m.Min)
}

// Requires an array or string to be at most a given length.
type MaxSize struct {
	Max int
}

func ValidMaxSize(max int) MaxSize {
	return MaxSize{max}
}

func (m MaxSize) IsSatisfied(obj interface{}) bool {
	if str, ok := obj.(string); ok {
		return len(str) <= m.Max
	}
	v := reflect.ValueOf(obj)
	if v.Kind() == reflect.Slice {
		return v.Len() <= m.Max
	}
	return false
}

func (m MaxSize) DefaultMessage() string {
	return fmt.Sprintln("Maximum size is", m.Max)
}

// Requires an array or string to be exactly a given length.
type Length struct {
	N int
}

func ValidLength(n int) Length {
	return Length{n}
}

func (s Length) IsSatisfied(obj interface{}) bool {
	if str, ok := obj.(string); ok {
		return len(str) == s.N
	}
	v := reflect.ValueOf(obj)
	if v.Kind() == reflect.Slice {
		return v.Len() == s.N
	}
	return false
}

func (s Length) DefaultMessage() string {
	return fmt.Sprintln("Required length is", s.N)
}

// Requires a string to match a given regex.
type Match struct {
	Regexp *regexp.Regexp
}

func ValidMatch(regex *regexp.Regexp) Match {
	return Match{regex}
}

func (m Match) IsSatisfied(obj interface{}) bool {
	str := obj.(string)
	return m.Regexp.MatchString(str)
}

func (m Match) DefaultMessage() string {
	return fmt.Sprintln("Must match", m.Regexp)
}

var emailPattern = regexp.MustCompile("^[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?$")

type Email struct {
	Match
}

func ValidEmail() Email {
	return Email{Match{emailPattern}}
}

func (e Email) DefaultMessage() string {
	return fmt.Sprintln("Must be a valid email address")
}