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use std::path::PathBuf;
use async_std::fs::File;
use async_std::path::Path;
use async_std::prelude::*;
use async_trait::async_trait;
use serde_json;
use crate::file::error::FileResult;
use crate::Envelope;
use crate::SendableEmail;
use crate::Transport;
pub mod error;
#[derive(Debug)]
#[cfg_attr(
feature = "serde-impls",
derive(serde_derive::Serialize, serde_derive::Deserialize)
)]
pub struct FileTransport {
path: PathBuf,
}
impl FileTransport {
pub fn new<P: AsRef<Path>>(path: P) -> FileTransport {
FileTransport {
path: PathBuf::from(path.as_ref()),
}
}
}
#[derive(PartialEq, Eq, Clone, Debug)]
#[cfg_attr(
feature = "serde-impls",
derive(serde_derive::Serialize, serde_derive::Deserialize)
)]
struct SerializableEmail {
envelope: Envelope,
message_id: String,
message: Vec<u8>,
}
#[async_trait]
impl<'a> Transport<'a> for FileTransport {
type Result = FileResult;
async fn send(&mut self, email: SendableEmail) -> FileResult {
let message_id = email.message_id().to_string();
let envelope = email.envelope().clone();
let mut file = self.path.clone();
file.push(format!("{}.json", message_id));
let serialized = serde_json::to_string(&SerializableEmail {
envelope,
message_id,
message: email.message_to_string().await?.as_bytes().to_vec(),
})?;
File::create(file)
.await?
.write_all(serialized.as_bytes())
.await?;
Ok(())
}
}