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-rw-r--r--src/imap/mailbox_view.rs9
-rw-r--r--src/imap/search.rs30
2 files changed, 34 insertions, 5 deletions
diff --git a/src/imap/mailbox_view.rs b/src/imap/mailbox_view.rs
index 5311635..4d0858f 100644
--- a/src/imap/mailbox_view.rs
+++ b/src/imap/mailbox_view.rs
@@ -344,12 +344,19 @@ impl MailboxView {
search_key: &SearchKey<'a>,
uid: bool,
) -> Result<Vec<Body<'static>>> {
- let (seq_set, seq_type) = search::Criteria(search_key).to_sequence_set();
+ // 1. Compute the subset of sequence identifiers we need to fetch
+ let query = search::Criteria(search_key);
+ let (seq_set, seq_type) = query.to_sequence_set();
let mailids = MailIdentifiersList(self.get_mail_ids(&seq_set, seq_type.is_uid())?);
let mail_u32 = match uid {
true => mailids.uids(),
_ => mailids.ids(),
};
+
+ // 2. Compute wether we will need to fetch the mail meta and/or the body
+ let _need_meta = query.need_meta();
+ let _need_body = query.need_body();
+
Ok(vec![Body::Data(Data::Search(mail_u32))])
}
diff --git a/src/imap/search.rs b/src/imap/search.rs
index bf1d30e..ef89288 100644
--- a/src/imap/search.rs
+++ b/src/imap/search.rs
@@ -69,12 +69,34 @@ impl<'a> Criteria<'a> {
}
}
- fn need_meta(&self) {
- unimplemented!();
+ /// Not really clever as we can have cases where we filter out
+ /// the email before needing to inspect its meta.
+ /// But for now we are seeking the most basic/stupid algorithm.
+ pub fn need_meta(&self) -> bool {
+ use SearchKey::*;
+ match self.0 {
+ // IMF Headers
+ Bcc(_) | Cc(_) | From(_) | Header(..) | SentBefore(_) | SentOn(_) | SentSince(_) | Subject(_) | To(_) => true,
+ // Internal Date is also stored in MailMeta
+ Before(_) | On(_) | Since(_) => true,
+ // Message size is also stored in MailMeta
+ Larger(_) | Smaller(_) => true,
+ And(and_list) => and_list.as_ref().iter().any(|sk| Criteria(sk).need_meta()),
+ Not(inner) => Criteria(inner).need_meta(),
+ Or(left, right) => Criteria(left).need_meta() || Criteria(right).need_meta(),
+ _ => false,
+ }
}
- fn need_body(&self) {
- unimplemented!();
+ pub fn need_body(&self) -> bool {
+ use SearchKey::*;
+ match self.0 {
+ Text(_) | Body(_) => true,
+ And(and_list) => and_list.as_ref().iter().any(|sk| Criteria(sk).need_body()),
+ Not(inner) => Criteria(inner).need_body(),
+ Or(left, right) => Criteria(left).need_body() || Criteria(right).need_body(),
+ _ => false,
+ }
}
}