120 lines
3.6 KiB
Rust
120 lines
3.6 KiB
Rust
use std::result::Result as RResult;
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use std::path::Path;
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use std::path::PathBuf;
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use std::fs::File;
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use std::io::Read;
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use libimagstore::store::{FileLockEntry, Store};
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use libimagref::reference::Ref;
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use libimagref::flags::RefFlags;
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use mailparse::{MailParseError, ParsedMail, parse_mail};
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use hasher::MailHasher;
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use result::Result;
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use error::{MapErrInto, MailErrorKind as MEK};
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struct Buffer(String);
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impl Buffer {
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pub fn parsed<'a>(&'a self) -> RResult<ParsedMail<'a>, MailParseError> {
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parse_mail(self.0.as_bytes())
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}
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}
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impl From<String> for Buffer {
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fn from(data: String) -> Buffer {
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Buffer(data)
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}
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}
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pub struct Mail<'a>(Ref<'a>, Buffer);
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impl<'a> Mail<'a> {
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/// Imports a mail from the Path passed
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pub fn import_from_path<P: AsRef<Path>>(store: &Store, p: P) -> Result<Mail> {
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let h = MailHasher::new();
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let f = RefFlags::default().with_content_hashing(true).with_permission_tracking(false);
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let p = PathBuf::from(p.as_ref());
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Ref::create_with_hasher(store, p, f, h)
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.map_err_into(MEK::RefCreationError)
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.and_then(|reference| {
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reference.fs_file()
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.map_err_into(MEK::RefHandlingError)
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.and_then(|path| File::open(path).map_err_into(MEK::IOError))
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.and_then(|mut file| {
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let mut s = String::new();
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file.read_to_string(&mut s)
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.map(|_| s)
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.map_err_into(MEK::IOError)
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})
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.map(Buffer::from)
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.map(|buffer| Mail(reference, buffer))
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})
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}
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/// Opens a mail by the passed hash
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pub fn open<S: AsRef<str>>(store: &Store, hash: S) -> Result<Option<Mail>> {
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Ref::get_by_hash(store, String::from(hash.as_ref()))
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.map_err_into(MEK::FetchByHashError)
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.map_err_into(MEK::FetchError)
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.and_then(|o| match o {
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Some(r) => Mail::from_ref(r).map(Some),
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None => Ok(None),
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})
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}
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/// Implement me as TryFrom as soon as it is stable
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pub fn from_ref(r: Ref<'a>) -> Result<Mail> {
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r.fs_file()
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.map_err_into(MEK::RefHandlingError)
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.and_then(|path| File::open(path).map_err_into(MEK::IOError))
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.and_then(|mut file| {
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let mut s = String::new();
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file.read_to_string(&mut s)
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.map(|_| s)
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.map_err_into(MEK::IOError)
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})
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.map(Buffer::from)
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.map(|buffer| Mail(r, buffer))
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}
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pub fn get_field(&self, field: &str) -> Result<Option<String>> {
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use mailparse::MailHeader;
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self.1
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.parsed()
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.map_err_into(MEK::MailParsingError)
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.map(|parsed| {
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parsed.headers
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.iter()
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.filter(|hdr| hdr.get_key().map(|n| n == field).unwrap_or(false))
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.next()
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.and_then(|field| field.get_value().ok())
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})
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}
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pub fn get_from(&self) -> Result<Option<String>> {
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self.get_field("From")
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}
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pub fn get_to(&self) -> Result<Option<String>> {
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self.get_field("To")
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}
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pub fn get_subject(&self) -> Result<Option<String>> {
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self.get_field("Subject")
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}
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pub fn get_message_id(&self) -> Result<Option<String>> {
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self.get_field("Message-ID")
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}
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pub fn get_in_reply_to(&self) -> Result<Option<String>> {
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self.get_field("In-Reply-To")
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}
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}
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