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