io-email 0.1.0

Email client library
Documentation 
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//! JMAP message-delete coroutine wrapping Email/set { destroy } (RFC
//! 8621 ยง4.7); JMAP destroy is a global delete across all mailboxes.
//!
//! # Example
//!
//! ```rust,ignore
//! use io_email::message::jmap::delete::JmapMessageDelete;
//!
//! client.run(JmapMessageDelete::new(&session, &auth, "_", "email-id")?)?;
//! ```

use alloc::{string::String, vec};

use io_jmap::{
    coroutine::{JmapCoroutine, JmapCoroutineState, JmapYield},
    rfc8620::JmapSession,
    rfc8621::email::set::{
        JmapEmailSet as InnerSet, JmapEmailSetArgs, JmapEmailSetError as InnerErr,
    },
};
use log::trace;
use secrecy::SecretString;
use thiserror::Error;

/// Errors produced by [`JmapMessageDelete`].
#[derive(Debug, Error)]
pub enum JmapMessageDeleteError {
    #[error(transparent)]
    Set(#[from] InnerErr),
    #[error("Email/set did not destroy `{0}`")]
    NotDestroyed(String),
}

/// I/O-free coroutine destroying a single JMAP email by id.
pub struct JmapMessageDelete {
    inner: InnerSet,
    id: String,
}

impl JmapMessageDelete {
    /// `mailbox` is unused; kept for shared-API symmetry.
    pub fn new(
        session: &JmapSession,
        http_auth: &SecretString,
        _mailbox: &str,
        id: &str,
    ) -> Result<Self, JmapMessageDeleteError> {
        trace!("prepare JMAP message delete");
        let args = JmapEmailSetArgs {
            destroy: Some(vec![id.into()]),
            ..JmapEmailSetArgs::default()
        };
        Ok(Self {
            inner: InnerSet::new(session, http_auth, args)?,
            id: id.into(),
        })
    }
}

impl JmapCoroutine for JmapMessageDelete {
    type Yield = JmapYield;
    type Return = Result<(), JmapMessageDeleteError>;

    fn resume(&mut self, bytes: Option<&[u8]>) -> JmapCoroutineState<Self::Yield, Self::Return> {
        match self.inner.resume(bytes) {
            JmapCoroutineState::Yielded(y) => JmapCoroutineState::Yielded(y),
            JmapCoroutineState::Complete(Ok(ok)) => {
                if ok.destroyed.iter().any(|d| d == &self.id) {
                    JmapCoroutineState::Complete(Ok(()))
                } else {
                    JmapCoroutineState::Complete(Err(JmapMessageDeleteError::NotDestroyed(
                        self.id.clone(),
                    )))
                }
            }
            JmapCoroutineState::Complete(Err(err)) => JmapCoroutineState::Complete(Err(err.into())),
        }
    }
}