76 lines
3 KiB
Rust
76 lines
3 KiB
Rust
use chrono::{DateTime, FixedOffset};
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use nom::combinator::map;
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use crate::header;
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use crate::imf::address::{address_list, mailbox_list, nullable_address_list, AddressList};
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use crate::imf::datetime::section as date;
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use crate::imf::identification::{msg_id, msg_list, MessageID, MessageIDList};
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use crate::imf::mailbox::{mailbox, AddrSpec, MailboxList, MailboxRef};
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use crate::imf::mime::{version, Version};
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use crate::imf::trace::{received_log, return_path, ReceivedLog};
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use crate::text::misc_token::{phrase_list, unstructured, PhraseList, Unstructured};
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#[derive(Debug, PartialEq)]
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pub enum Field<'a> {
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// 3.6.1. The Origination Date Field
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Date(Option<DateTime<FixedOffset>>),
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// 3.6.2. Originator Fields
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From(MailboxList<'a>),
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Sender(MailboxRef<'a>),
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ReplyTo(AddressList<'a>),
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// 3.6.3. Destination Address Fields
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To(AddressList<'a>),
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Cc(AddressList<'a>),
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Bcc(AddressList<'a>),
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// 3.6.4. Identification Fields
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MessageID(MessageID<'a>),
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InReplyTo(MessageIDList<'a>),
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References(MessageIDList<'a>),
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// 3.6.5. Informational Fields
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Subject(Unstructured<'a>),
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Comments(Unstructured<'a>),
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Keywords(PhraseList<'a>),
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// 3.6.6 Resent Fields (not implemented)
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// 3.6.7 Trace Fields
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Received(ReceivedLog<'a>),
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ReturnPath(Option<AddrSpec<'a>>),
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MIMEVersion(Version),
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}
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impl<'a> TryFrom<&header::Field<'a>> for Field<'a> {
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type Error = ();
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fn try_from(f: &header::Field<'a>) -> Result<Self, Self::Error> {
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let content = match f {
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header::Field::Good(header::Kv2(key, value)) => {
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match key.to_ascii_lowercase().as_slice() {
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b"date" => map(date, Field::Date)(value),
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b"from" => map(mailbox_list, Field::From)(value),
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b"sender" => map(mailbox, Field::Sender)(value),
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b"reply-to" => map(address_list, Field::ReplyTo)(value),
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b"to" => map(address_list, Field::To)(value),
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b"cc" => map(address_list, Field::Cc)(value),
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b"bcc" => map(nullable_address_list, Field::Bcc)(value),
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b"message-id" => map(msg_id, Field::MessageID)(value),
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b"in-reply-to" => map(msg_list, Field::InReplyTo)(value),
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b"references" => map(msg_list, Field::References)(value),
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b"subject" => map(unstructured, Field::Subject)(value),
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b"comments" => map(unstructured, Field::Comments)(value),
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b"keywords" => map(phrase_list, Field::Keywords)(value),
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b"return-path" => map(return_path, Field::ReturnPath)(value),
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b"received" => map(received_log, Field::Received)(value),
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b"mime-version" => map(version, Field::MIMEVersion)(value),
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_ => return Err(()),
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}
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}
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_ => return Err(()),
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};
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content.map(|(_, content)| content).or(Err(()))
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}
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}
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