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use super::*;
use serde::de::{self, Deserialize, Deserializer, Unexpected, Visitor};
use serde::ser::{Serialize, Serializer};
use std::fmt;
use std::string::ToString;
#[derive(Debug, Eq, PartialEq, Hash)]
pub struct Identifier(String);
impl Default for Identifier {
fn default() -> Self {
Identifier("00000000000000000000000000000000".to_string())
}
}
impl Identifier {
pub fn new(raw: String) -> Self {
Identifier(raw)
}
pub fn as_str(&self) -> &str {
self.0.as_str()
}
}
impl fmt::Display for Identifier {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.0)
}
}
impl FromStr for Identifier {
type Err = MessageBirdError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
const VALID_LENGTH: usize = 32;
if s.len() != VALID_LENGTH {
Err(MessageBirdError::TypeError {
msg: format!(
"unexpected id length {}, expected {}",
s.len(),
VALID_LENGTH
),
})
} else {
Ok(Self::new(String::from(s)))
}
}
}
impl Serialize for Identifier {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_str(self.as_str())
}
}
struct IdentifierVisitor;
impl<'de> Visitor<'de> for IdentifierVisitor {
type Value = Identifier;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("a valid identifier str with 32 characters")
}
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Identifier::from_str(value)
.map_err(|_e| de::Error::invalid_value(Unexpected::Str(value), &self))
}
}
impl<'de> Deserialize<'de> for Identifier {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_str(IdentifierVisitor)
}
}
#[cfg(test)]
mod test {
use super::*;
static RAW: &str = r#"
"01238dsfusd98ufe89hsdkncksadfkkr"
"#;
deser_roundtrip!(identifier_deser, Identifier, RAW);
serde_roundtrip!(identifier_serde, Identifier, Identifier::default());
}