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
use std::{
error::Error,
fmt::{Display, Formatter, Result as FmtResult},
};
pub const STICKER_DESCRIPTION_LENGTH_MAX: usize = 200;
pub const STICKER_DESCRIPTION_LENGTH_MIN: usize = 2;
pub const STICKER_NAME_LENGTH_MAX: usize = 30;
pub const STICKER_NAME_LENGTH_MIN: usize = 2;
pub const STICKER_TAGS_LENGTH_MAX: usize = 200;
pub const STICKER_TAGS_LENGTH_MIN: usize = 2;
#[derive(Debug)]
pub struct StickerValidationError {
kind: StickerValidationErrorType,
}
impl StickerValidationError {
#[must_use = "retrieving the type has no effect if left unused"]
pub const fn kind(&self) -> &StickerValidationErrorType {
&self.kind
}
#[allow(clippy::unused_self)]
#[must_use = "consuming the error and retrieving the source has no effect if left unused"]
pub fn into_source(self) -> Option<Box<dyn Error + Send + Sync>> {
None
}
#[must_use = "consuming the error into its parts has no effect if left unused"]
pub fn into_parts(
self,
) -> (
StickerValidationErrorType,
Option<Box<dyn Error + Send + Sync>>,
) {
(self.kind, None)
}
}
impl Display for StickerValidationError {
fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
match self.kind {
StickerValidationErrorType::DescriptionInvalid => {
f.write_str("sticker's description is invalid")
}
StickerValidationErrorType::NameInvalid => f.write_str("sticker's name is invalid"),
StickerValidationErrorType::TagsInvalid => f.write_str("sticker's tags are invalid"),
}
}
}
impl Error for StickerValidationError {}
#[derive(Debug)]
pub enum StickerValidationErrorType {
DescriptionInvalid,
NameInvalid,
TagsInvalid,
}
pub fn description(value: impl AsRef<str>) -> Result<(), StickerValidationError> {
let len = value.as_ref().chars().count();
if (STICKER_DESCRIPTION_LENGTH_MIN..=STICKER_DESCRIPTION_LENGTH_MAX).contains(&len) {
Ok(())
} else {
Err(StickerValidationError {
kind: StickerValidationErrorType::DescriptionInvalid,
})
}
}
pub fn name(value: impl AsRef<str>) -> Result<(), StickerValidationError> {
let len = value.as_ref().chars().count();
if (STICKER_NAME_LENGTH_MIN..=STICKER_NAME_LENGTH_MAX).contains(&len) {
Ok(())
} else {
Err(StickerValidationError {
kind: StickerValidationErrorType::NameInvalid,
})
}
}
pub fn tags(value: impl AsRef<str>) -> Result<(), StickerValidationError> {
let len = value.as_ref().chars().count();
if (STICKER_TAGS_LENGTH_MIN..=STICKER_TAGS_LENGTH_MAX).contains(&len) {
Ok(())
} else {
Err(StickerValidationError {
kind: StickerValidationErrorType::TagsInvalid,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn description_length() {
assert!(description("aa").is_ok());
assert!(description("a".repeat(200)).is_ok());
assert!(description("a").is_err());
assert!(description("a".repeat(201)).is_err());
}
#[test]
fn name_length() {
assert!(name("aa").is_ok());
assert!(name("a".repeat(30)).is_ok());
assert!(name("a").is_err());
assert!(name("a".repeat(31)).is_err());
}
#[test]
fn tags_length() {
assert!(tags("aa").is_ok());
assert!(tags("a".repeat(200)).is_ok());
assert!(tags("a").is_err());
assert!(tags("a".repeat(201)).is_err());
}
}