imap-codec 0.6.0

Low-level IMAP Parser and Serializer
Documentation 
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use abnf_core::streaming::SP;
use imap_types::{address::Address, core::NString, envelope::Envelope};
use nom::{
    branch::alt,
    bytes::streaming::tag,
    combinator::map,
    multi::many1,
    sequence::{delimited, tuple},
    IResult,
};

use crate::rfc3501::{
    address::address,
    core::{nil, nstring},
};

/// `envelope = "("
///             env-date SP
///             env-subject SP
///             env-from SP
///             env-sender SP
///             env-reply-to SP
///             env-to SP
///             env-cc SP
///             env-bcc SP
///             env-in-reply-to SP
///             env-message-id
///             ")"`
pub fn envelope(input: &[u8]) -> IResult<&[u8], Envelope> {
    let mut parser = delimited(
        tag(b"("),
        tuple((
            env_date,
            SP,
            env_subject,
            SP,
            env_from,
            SP,
            env_sender,
            SP,
            env_reply_to,
            SP,
            env_to,
            SP,
            env_cc,
            SP,
            env_bcc,
            SP,
            env_in_reply_to,
            SP,
            env_message_id,
        )),
        tag(b")"),
    );

    let (
        remaining,
        (
            date,
            _,
            subject,
            _,
            from,
            _,
            sender,
            _,
            reply_to,
            _,
            to,
            _,
            cc,
            _,
            bcc,
            _,
            in_reply_to,
            _,
            message_id,
        ),
    ) = parser(input)?;

    Ok((
        remaining,
        Envelope {
            date,
            subject,
            from,
            sender,
            reply_to,
            to,
            cc,
            bcc,
            in_reply_to,
            message_id,
        },
    ))
}

#[inline]
/// `env-date = nstring`
pub fn env_date(input: &[u8]) -> IResult<&[u8], NString> {
    nstring(input)
}

#[inline]
/// `env-subject = nstring`
pub fn env_subject(input: &[u8]) -> IResult<&[u8], NString> {
    nstring(input)
}

/// `env-from = "(" 1*address ")" / nil`
pub fn env_from(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

/// `env-sender = "(" 1*address ")" / nil`
pub fn env_sender(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

/// `env-reply-to = "(" 1*address ")" / nil`
pub fn env_reply_to(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

/// `env-to = "(" 1*address ")" / nil`
pub fn env_to(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

/// `env-cc = "(" 1*address ")" / nil`
pub fn env_cc(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

/// `env-bcc = "(" 1*address ")" / nil`
pub fn env_bcc(input: &[u8]) -> IResult<&[u8], Vec<Address>> {
    alt((
        delimited(tag(b"("), many1(address), tag(b")")),
        map(nil, |_| Vec::new()),
    ))(input)
}

#[inline]
/// `env-in-reply-to = nstring`
pub fn env_in_reply_to(input: &[u8]) -> IResult<&[u8], NString> {
    nstring(input)
}

#[inline]
/// `env-message-id = nstring`
pub fn env_message_id(input: &[u8]) -> IResult<&[u8], NString> {
    nstring(input)
}