link_relation 0.1.0

Registered link relation types for Web Linking (RFC8288)
Documentation 
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use serde::de;
use serde::{Deserialize, Deserializer, Serialize, Serializer};

use super::LinkRelation;
use serde::de::Unexpected;
use std::fmt::{Display, Formatter};
use std::str::FromStr;

impl Serialize for LinkRelation {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        serializer.serialize_str(self.get_name())
    }
}

/// Serde visitor for [LinkRelation].
struct LinkRelationVisitor;

impl<'de> de::Visitor<'de> for LinkRelationVisitor {
    type Value = LinkRelation;

    fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
        formatter.write_str("registered link relation type")
    }

    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(LinkRelation::from_str(value)
            .map_err(|_| E::invalid_value(Unexpected::Str(value), &Self))?)
    }

    fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(LinkRelation::from_str(&value)
            .map_err(|_| E::invalid_value(Unexpected::Str(&value), &Self))?)
    }

    fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        let s = core::str::from_utf8(v.trim_ascii())
            .map_err(|_| E::invalid_value(Unexpected::Bytes(v), &Self))?;
        Ok(LinkRelation::from_str(s).map_err(|_| E::invalid_value(Unexpected::Bytes(v), &Self))?)
    }
}

impl<'de> Deserialize<'de> for LinkRelation {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_str(LinkRelationVisitor)
    }
}