bcp commit

1 files changed, 0 insertions, 292 deletions

diff --git a/src/imap/mime_view.rs b/src/imap/mime_view.rs
index ba324a2..e69de29 100644
--- a/src/imap/mime_view.rs
+++ b/src/imap/mime_view.rs
@@ -1,292 +0,0 @@
-use std::borrow::Cow;
-use std::num::NonZeroU32;
-use std::collections::HashSet;
-
-use anyhow::{anyhow, bail, Result};
-
-use imap_codec::imap_types::core::{AString, IString, NonEmptyVec};
-use imap_codec::imap_types::fetch::{
-    Section as FetchSection, Part as FetchPart
-};
-
-use eml_codec::{
-    header, part::AnyPart,
-};
-
-
-pub enum BodySection<'a> {
-    Full(Cow<'a, [u8]>),
-    Slice {
-        body: Cow<'a, [u8]>, 
-        origin_octet: u32,
-    },
-}
-
-/// Logic for BODY[<section>]<<partial>>
-/// Works in 3 times:
-///  1. Find the section (RootMime::subset)
-///  2. Apply the extraction logic (SelectedMime::extract), like TEXT, HEADERS, etc.
-///  3. Keep only the given subset provided by partial
-pub fn body_ext<'a>(
-    part: &'a AnyPart<'a>, 
-    section: &Option<FetchSection>, 
-    partial: &Option<(u32, NonZeroU32)>
-) -> Result<Cow<'a, [u8]>> {
-        let root_mime = RootMime(part);
-        let (extractor, path) = SubsettedSection::from(section);
-        let selected_mime = root_mime.subset(path);
-        unimplemented!();
-    }
-
-/// RootMime
-///
-/// Example of message sections:
-///
-/// ```
-///    HEADER     ([RFC-2822] header of the message)
-///    TEXT       ([RFC-2822] text body of the message) MULTIPART/MIXED
-///    1          TEXT/PLAIN
-///    2          APPLICATION/OCTET-STREAM
-///    3          MESSAGE/RFC822
-///    3.HEADER   ([RFC-2822] header of the message)
-///    3.TEXT     ([RFC-2822] text body of the message) MULTIPART/MIXED
-///    3.1        TEXT/PLAIN
-///    3.2        APPLICATION/OCTET-STREAM
-///    4          MULTIPART/MIXED
-///    4.1        IMAGE/GIF
-///    4.1.MIME   ([MIME-IMB] header for the IMAGE/GIF)
-///    4.2        MESSAGE/RFC822
-///    4.2.HEADER ([RFC-2822] header of the message)
-///    4.2.TEXT   ([RFC-2822] text body of the message) MULTIPART/MIXED
-///    4.2.1      TEXT/PLAIN
-///    4.2.2      MULTIPART/ALTERNATIVE
-///    4.2.2.1    TEXT/PLAIN
-///    4.2.2.2    TEXT/RICHTEXT
-/// ```
-
-
-struct RootMime<'a>(&'a AnyPart<'a>);
-impl<'a> RootMime<'a> {
-
-
-    /// A MIME object is a tree of elements. 
-    /// The path indicates which element must be picked.
-    /// This function returns the picked element as the new view
-    fn subset(&self, path: Option<&FetchPart>) -> Result<SelectedMime> {
-        match path {
-            None => Ok(SelectedMime(self.0)),
-            Some(v) => self.rec_subset(v.0.as_ref()),
-        }
-    }
-
-    fn rec_subset(self, path: &[NonZeroU32]) -> Result<SelectedMime> {
-        if path.is_empty() {
-            Ok(SelectedMime(self.0))
-        } else {
-            match self.0 {
-                AnyPart::Mult(x) => {
-                    let next = Self(x.children
-                        .get(path[0].get() as usize - 1)
-                        .ok_or(anyhow!("Unable to resolve subpath {:?}, current multipart has only {} elements", path, x.children.len()))?);
-                    next.rec_subset(&path[1..])
-                },
-                AnyPart::Msg(x) => {
-                    let next = Self(x.child.as_ref());
-                    next.rec_subset(path)
-                },
-                _ => bail!("You tried to access a subpart on an atomic part (text or binary). Unresolved subpath {:?}", path),
-            }
-        }
-    }
-}
-
-//----------------------------------------------------------
-
-/// A FetchSection must be handled in 2 times:
-///  - First we must extract the MIME part
-///  - Then we must process it as desired
-/// The given struct mixes both work, so 
-/// we separate this work here.
-enum SubsettedSection<'a> {
-    Part,
-    Header,
-    HeaderFields(&'a NonEmptyVec<AString<'a>>),
-    HeaderFieldsNot(&'a NonEmptyVec<AString<'a>>),
-    Text,
-    Mime,
-}
-impl<'a> SubsettedSection<'a> {
-    fn from(section: &'a Option<FetchSection>) -> (Self, Option<&'a FetchPart>) {
-        match section {
-            Some(FetchSection::Text(maybe_part)) => (Self::Text, maybe_part.as_ref()),
-            Some(FetchSection::Header(maybe_part)) => (Self::Header, maybe_part.as_ref()),
-            Some(FetchSection::HeaderFields(maybe_part, fields)) => (Self::HeaderFields(fields), maybe_part.as_ref()),
-            Some(FetchSection::HeaderFieldsNot(maybe_part, fields)) => (Self::HeaderFieldsNot(fields), maybe_part.as_ref()),
-            Some(FetchSection::Text(maybe_part)) => (Self::Text, maybe_part.as_ref()),
-            Some(FetchSection::Mime(part)) => (Self::Mime, Some(part)),
-            Some(FetchSection::Part(part)) => (Self::Part, Some(part)),
-            None => (Self::Part, None),
-        }
-    }
-}
-
-struct SelectedMime<'a>(&'a AnyPart<'a>);
-impl<'a> SelectedMime<'a> {
-    /// The subsetted fetch section basically tells us the
-    /// extraction logic to apply on our selected MIME.
-    /// This function acts as a router for these logic.
-    fn extract(&self, extractor: &SubsettedSection) -> Result<ExtractedFull<'a>> {
-        match extractor {
-            SubsettedSection::Text => self.text(),
-            SubsettedSection::Header => self.header(),
-            SubsettedSection::HeaderFields(fields) => self.header_fields(fields, false),
-            SubsettedSection::HeaderFieldsNot(fields) => self.header_fields(fields, true),
-            SubsettedSection::Part => self.part(),
-            SubsettedSection::Mime => self.mime(),
-        }
-    }
-
-    fn mime(&self) -> Result<ExtractedFull<'a>> {
-        let bytes = match &self.0 {
-            AnyPart::Txt(p) => p.mime.fields.raw,
-            AnyPart::Bin(p) => p.mime.fields.raw,
-            AnyPart::Msg(p) => p.child.mime().raw,
-            AnyPart::Mult(p) => p.mime.fields.raw,
-        };
-        Ok(ExtractedFull(bytes.to_vec().into()))
-    }
-
-    fn part(&self) -> Result<ExtractedFull<'a>> {
-        let bytes = match &self.0 {
-            AnyPart::Txt(p) => p.body,
-            AnyPart::Bin(p) => p.body,
-            AnyPart::Msg(p) => p.raw_part,
-            AnyPart::Mult(_) => bail!("Multipart part has no body"),
-        };
-        Ok(ExtractedFull(bytes.to_vec().into()))
-    }
-
-    /// The [...] HEADER.FIELDS, and HEADER.FIELDS.NOT part
-    /// specifiers refer to the [RFC-2822] header of the message or of
-    /// an encapsulated [MIME-IMT] MESSAGE/RFC822 message.
-    /// HEADER.FIELDS and HEADER.FIELDS.NOT are followed by a list of
-    /// field-name (as defined in [RFC-2822]) names, and return a
-    /// subset of the header.  The subset returned by HEADER.FIELDS
-    /// contains only those header fields with a field-name that
-    /// matches one of the names in the list; similarly, the subset
-    /// returned by HEADER.FIELDS.NOT contains only the header fields
-    /// with a non-matching field-name.  The field-matching is
-    /// case-insensitive but otherwise exact.
-    fn header_fields(&self, fields: &'a NonEmptyVec<AString<'a>>, invert: bool) -> Result<ExtractedFull<'a>> {
-        // Build a lowercase ascii hashset with the fields to fetch
-        let index = fields
-            .as_ref()
-            .iter()
-            .map(|x| match x {
-                AString::Atom(a) => a.inner().as_bytes(),
-                AString::String(IString::Literal(l)) => l.as_ref(),
-                AString::String(IString::Quoted(q)) => q.inner().as_bytes(),
-            }.to_ascii_lowercase())
-        .collect::<HashSet<_>>();
-
-        // Extract MIME headers
-        let mime = match &self.0 {
-            AnyPart::Msg(msg) => msg.child.mime(),
-            other => other.mime(),
-        };
-
-        // Filter our MIME headers based on the field index
-        // 1. Keep only the correctly formatted headers
-        // 2. Keep only based on the index presence or absence
-        // 3. Reduce as a byte vector
-        let buffer = mime.kv.iter()
-            .filter_map(|field| match field {
-                header::Field::Good(header::Kv2(k, v)) => Some((k, v)),
-                _ => None,
-            })
-            .filter(|(k, _)| index.contains(&k.to_ascii_lowercase()) ^ invert)
-            .fold(vec![], |mut acc, (k, v)| {
-                acc.extend(*k);
-                acc.extend(b": ");
-                acc.extend(*v);
-                acc.extend(b"\r\n");
-                acc
-            });
-
-        Ok(ExtractedFull(buffer.into()))
-    }
-
-    /// The HEADER [...] part specifiers refer to the [RFC-2822] header of the message or of
-    /// an encapsulated [MIME-IMT] MESSAGE/RFC822 message.
-    /// ```raw
-    /// HEADER     ([RFC-2822] header of the message)
-    /// ```
-    fn header(&self) -> Result<ExtractedFull<'a>> {
-        let msg = self.0.as_message().ok_or(anyhow!("Selected part must be a message/rfc822"))?;
-        Ok(ExtractedFull(msg.raw_headers.into()))
-    }
-
-    /// The TEXT part specifier refers to the text body of the message, omitting the [RFC-2822] header.
-    fn text(&self) -> Result<ExtractedFull<'a>> {
-        let msg = self.0.as_message().ok_or(anyhow!("Selected part must be a message/rfc822"))?;
-        Ok(ExtractedFull(msg.raw_body.into()))
-    }
-}
-
-// ---------------------------
-
-struct ExtractedFull<'a>(Cow<'a, [u8]>);
-impl<'a> ExtractedFull<'a> {
-    /// It is possible to fetch a substring of the designated text.
-    /// This is done by appending an open angle bracket ("<"), the
-    /// octet position of the first desired octet, a period, the
-    /// maximum number of octets desired, and a close angle bracket
-    /// (">") to the part specifier.  If the starting octet is beyond
-    /// the end of the text, an empty string is returned.
-    ///
-    /// Any partial fetch that attempts to read beyond the end of the
-    /// text is truncated as appropriate.  A partial fetch that starts
-    /// at octet 0 is returned as a partial fetch, even if this
-    /// truncation happened.
-    ///
-    /// Note: This means that BODY[]<0.2048> of a 1500-octet message
-    /// will return BODY[]<0> with a literal of size 1500, not
-    /// BODY[].
-    ///
-    /// Note: A substring fetch of a HEADER.FIELDS or
-    /// HEADER.FIELDS.NOT part specifier is calculated after
-    /// subsetting the header.
-    fn to_body_section(&self, partial: &'_ Option<(u32, NonZeroU32)>) -> BodySection<'a> {
-        match partial {
-            Some((begin, len)) => self.partialize(*begin, *len),
-            None => BodySection::Full(self.0),
-        }
-    }
-
-    fn partialize(&self, begin: u32, len: NonZeroU32) -> BodySection<'a> {
-        // Asked range is starting after the end of the content,
-        // returning an empty buffer
-        if begin as usize > self.0.len() {
-            return BodySection::Slice {
-                body: Cow::Borrowed(&[][..]),
-                origin_octet: begin,
-            }
-        } 
-
-        // Asked range is ending after the end of the content,
-        // slice only the beginning of the buffer
-        if (begin + len.get()) as usize >= self.0.len() {
-            return BodySection::Slice {
-                body: Cow::Borrowed(&self.0[begin as usize..]),
-                origin_octet: begin,
-            }
-        }
-
-        // Range is included inside the considered content,
-        // this is the "happy case"
-        BodySection::Slice {
-            body: Cow::Borrowed(&self.0[begin as usize..(begin + len.get()) as usize]),
-            origin_octet: begin,
-        }
-    }
-}