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//! `#[serde(with = "...")]`で使用するためのモジュール群

use serde::de::{Error, Visitor};

struct StringVisitor;

impl<'de> Visitor<'de> for StringVisitor {
    type Value = String;

    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(formatter, "a string")
    }

    fn visit_string<E: Error>(self, v: String) -> Result<Self::Value, E> {
        Ok(v)
    }

    fn visit_str<E: Error>(self, v: &str) -> Result<Self::Value, E> {
        Ok(String::from(v))
    }
}

#[cfg(feature = "chrono")]
/// タイムスタンプ型[`crate::payloads::types::TimeStamp`]用のモジュール
pub mod timestamp {
    use serde::{Deserialize, Deserializer, Serialize, Serializer};

    use crate::payloads::types::TimeStamp;

    pub fn serialize<S: Serializer>(data: &TimeStamp, serializer: S) -> Result<S::Ok, S::Error> {
        data.serialize(serializer)
    }

    pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<TimeStamp, D::Error> {
        TimeStamp::deserialize(deserializer)
    }
}

#[cfg(not(feature = "chrono"))]
#[cfg(feature = "time")]
/// タイムスタンプ型[`crate::payloads::types::TimeStamp`]用のモジュール
pub mod timestamp {
    pub use time::serde::rfc3339::{deserialize, serialize};
}

#[cfg(not(feature = "chrono"))]
#[cfg(not(feature = "time"))]
/// タイムスタンプ型[`crate::payloads::types::TimeStamp`]用のモジュール
pub mod timestamp {
    use serde::{Deserializer, Serialize, Serializer};

    pub fn serialize<S: Serializer>(data: &String, serializer: S) -> Result<S::Ok, S::Error> {
        data.serialize(serializer)
    }

    pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<String, D::Error> {
        deserializer.deserialize_string(super::StringVisitor)
    }
}

#[cfg(feature = "uuid")]
pub mod uuid {
    use serde::{Deserialize, Deserializer, Serialize, Serializer};
    use uuid::Uuid;

    pub fn serialize<S: Serializer>(data: &Uuid, serializer: S) -> Result<S::Ok, S::Error> {
        data.serialize(serializer)
    }

    pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<Uuid, D::Error> {
        Uuid::deserialize(deserializer)
    }
}

#[cfg(not(feature = "uuid"))]
pub mod uuid {
    use serde::{Deserializer, Serialize, Serializer};

    pub fn serialize<S: Serializer>(data: &String, serializer: S) -> Result<S::Ok, S::Error> {
        data.serialize(serializer)
    }

    pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<String, D::Error> {
        deserializer.deserialize_string(super::StringVisitor)
    }
}