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

use serde::de::Error;
use serde::Deserialize;

use regex::Regex;

/// In case you encounter a JSON API that does not return the `u64`
/// as a number like you handsome and smart person deserve, but
/// instead wraps it in a `String`, like:
/// ```rust
/// use serde::Deserialize;
/// use serde_json::{Error, from_str};
///
/// #[derive(Deserialize)]
/// struct Foo {
///  definetly_a_u64: u64,
/// }
///
/// let json = r#"{
///   "definetly_a_u64": "0123456789"
/// }"#;
///
/// let foo: Result<Foo, Error> = from_str(json);
///
/// assert!(foo.is_err());
/// ```
///
/// Make the above code working with:
/// ```rust
/// use serde::Deserialize;
/// use serde_json::{Error, from_str};
///
/// use deserialize_custom_strings::deserialize_u64;
///
/// #[derive(Deserialize)]
/// struct Foo {
///  #[serde(deserialize_with = "deserialize_u64")]
///  definetly_a_u64: u64,
/// }
///
/// let json = r#"{
///   "definetly_a_u64": "0123456789"
/// }"#;
///
/// let foo: Result<Foo, Error> = from_str(json);
///
/// assert!(foo.is_ok());
/// assert_eq!(foo.unwrap().definetly_a_u64, 123456789);
/// ```
pub fn deserialize_u64<'de, D>(
  deserializer: D,
) -> Result<u64, D::Error>
where
  D: serde::de::Deserializer<'de>,
{
  let s = String::deserialize(deserializer)?;
  s.parse().map_err(Error::custom)
}

/// See [deserialize_u64].
///
/// Example:
/// ```rust
/// use serde::Deserialize;
/// use serde_json::{Error, from_str};
///
/// use deserialize_custom_strings::deserialize_option_u64;
///
/// #[derive(Deserialize)]
/// struct Foo {
///   #[serde(deserialize_with = "deserialize_option_u64")]
///   definetly_a_option_u64: Option<u64>,
/// }
///
/// let json = r#"{
///   "definetly_a_option_u64": "0123456789"
/// }"#;
///
/// let foo: Result<Foo, Error> = from_str(json);
///
/// assert!(foo.is_ok());
/// assert_eq!(foo.unwrap().definetly_a_option_u64, Some(123456789));
///
/// let json = r#"{
///   "definetly_a_option_u64": null
/// }"#;
///
/// let foo: Result<Foo, Error> = from_str(json);
///
/// assert!(foo.is_ok());
/// assert_eq!(foo.unwrap().definetly_a_option_u64, None);
///
/// let json = r#"{
///   "definetly_a_option_u64": -123456789
/// }"#;
///
/// let foo: Result<Foo, Error> = from_str(json);
///
/// assert!(foo.is_err());
/// ```
///
pub fn deserialize_option_u64<'de, D>(
  deserializer: D,
) -> Result<Option<u64>, D::Error>
where
  D: serde::de::Deserializer<'de>,
{
  let o: Option<String> = Option::deserialize(deserializer)?;

  Ok(match o {
    Some(s) => Some(s.parse().map_err(Error::custom)?),
    None => None,
  })
}

pub fn deserialize_phone_number<'de, D>(
  deserializer: D,
) -> Result<String, D::Error>
where
  D: serde::de::Deserializer<'de>,
{
  let r = Regex::new(r"(?P<x>(^\+)|([0-9]))[^0-9]+")
    .map_err(Error::custom)?;

  let s = String::deserialize(deserializer)?;

  Ok((*r.replace_all(&s, "$x")).to_owned())
}

pub fn deserialize_email<'de, D>(
  deserializer: D,
) -> Result<String, D::Error>
where
  D: serde::de::Deserializer<'de>,
{
  let s = String::deserialize(deserializer)?;
  Ok(s.to_lowercase())
}

pub fn deserialize_urlencoded<'de, D>(
  deserializer: D,
) -> Result<String, D::Error>
where
  D: serde::de::Deserializer<'de>,
{
  let s = String::deserialize(deserializer)?;

  let mut res = String::new();
  let mut iter = s.chars();

  while let Some(c) = iter.next() {
    if c == '%' {
      let left = iter.next();
      let right = iter.next();
      match (left, right) {
        (Some(l), Some(r)) => {
          let byte = u8::from_str_radix(&format!("{}{}", l, r), 16)
            .map_err(Error::custom)?;
          res += &(byte as char).to_string();
        }
        _ => return Err("index error").map_err(Error::custom),
      }
    } else {
      res += &c.to_string();
    }
  }

  Ok(res)
}