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use imap_codec::imap_types::command::FetchModifier;
use imap_codec::imap_types::fetch::{MacroOrMessageDataItemNames, MessageDataItemName, Section};
/// Internal decisions based on fetched attributes
/// passed by the client
pub struct AttributesProxy {
pub attrs: Vec<MessageDataItemName<'static>>,
}
impl AttributesProxy {
pub fn new(
attrs: &MacroOrMessageDataItemNames<'static>,
modifiers: &[FetchModifier],
is_uid_fetch: bool,
) -> Self {
// Expand macros
let mut fetch_attrs = match attrs {
MacroOrMessageDataItemNames::Macro(m) => {
use imap_codec::imap_types::fetch::Macro;
use MessageDataItemName::*;
match m {
Macro::All => vec![Flags, InternalDate, Rfc822Size, Envelope],
Macro::Fast => vec![Flags, InternalDate, Rfc822Size],
Macro::Full => vec![Flags, InternalDate, Rfc822Size, Envelope, Body],
_ => {
tracing::error!("unimplemented macro");
vec![]
}
}
}
MacroOrMessageDataItemNames::MessageDataItemNames(a) => a.clone(),
};
// Handle uids
if is_uid_fetch && !fetch_attrs.contains(&MessageDataItemName::Uid) {
fetch_attrs.push(MessageDataItemName::Uid);
}
// Handle inferred MODSEQ tag
let is_changed_since = modifiers
.iter()
.any(|m| matches!(m, FetchModifier::ChangedSince(..)));
if is_changed_since && !fetch_attrs.contains(&MessageDataItemName::ModSeq) {
fetch_attrs.push(MessageDataItemName::ModSeq);
}
Self { attrs: fetch_attrs }
}
pub fn is_enabling_condstore(&self) -> bool {
self.attrs
.iter()
.any(|x| matches!(x, MessageDataItemName::ModSeq))
}
pub fn need_body(&self) -> bool {
self.attrs.iter().any(|x| match x {
MessageDataItemName::Body
| MessageDataItemName::Rfc822
| MessageDataItemName::Rfc822Text
| MessageDataItemName::BodyStructure => true,
MessageDataItemName::BodyExt {
section: Some(section),
partial: _,
peek: _,
} => match section {
Section::Header(None)
| Section::HeaderFields(None, _)
| Section::HeaderFieldsNot(None, _) => false,
_ => true,
},
MessageDataItemName::BodyExt { .. } => true,
_ => false,
})
}
}
|
