msg-tool/src/utils/serde_base64bytes.rs

use base64::Engine;
use serde::{Deserialize, Serialize};
use std::ops::{Deref, DerefMut};

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Base64Bytes {
    pub bytes: Vec<u8>,
}

impl Deref for Base64Bytes {
    type Target = Vec<u8>;

    fn deref(&self) -> &Self::Target {
        &self.bytes
    }
}

impl DerefMut for Base64Bytes {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.bytes
    }
}

impl Serialize for Base64Bytes {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        let encoded = base64::engine::general_purpose::STANDARD.encode(&self.bytes);
        serializer.serialize_str(&encoded)
    }
}

impl<'de> Deserialize<'de> for Base64Bytes {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let s: &str = Deserialize::deserialize(deserializer)?;
        let decoded = base64::engine::general_purpose::STANDARD
            .decode(s)
            .map_err(serde::de::Error::custom)?;
        Ok(Base64Bytes { bytes: decoded })
    }
}