1 files changed, 137 insertions, 0 deletions
diff --git a/lib/domain/libimagmail/src/mail.rs b/lib/domain/libimagmail/src/mail.rs
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+++ b/lib/domain/libimagmail/src/mail.rs
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+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+use std::path::Path;
+use std::path::PathBuf;
+use std::fs::File;
+use std::io::Read;
+
+use libimagstore::store::Store;
+use libimagref::reference::Ref;
+use libimagref::flags::RefFlags;
+
+use email::MimeMessage;
+use email::results::ParsingResult as EmailParsingResult;
+
+use hasher::MailHasher;
+use result::Result;
+use error::{MapErrInto, MailErrorKind as MEK};
+
+struct Buffer(String);
+
+impl Buffer {
+    pub fn parsed(&self) -> EmailParsingResult<MimeMessage> {
+        MimeMessage::parse(&self.0)
+    }
+}
+
+impl From<String> for Buffer {
+    fn from(data: String) -> Buffer {
+        Buffer(data)
+    }
+}
+
+pub struct Mail<'a>(Ref<'a>, Buffer);
+
+impl<'a> Mail<'a> {
+
+    /// Imports a mail from the Path passed
+    pub fn import_from_path<P: AsRef<Path>>(store: &Store, p: P) -> Result<Mail> {
+        let h = MailHasher::new();
+        let f = RefFlags::default().with_content_hashing(true).with_permission_tracking(false);
+        let p = PathBuf::from(p.as_ref());
+
+        Ref::create_with_hasher(store, p, f, h)
+            .map_err_into(MEK::RefCreationError)
+            .and_then(|reference| {
+                reference.fs_file()
+                    .map_err_into(MEK::RefHandlingError)
+                    .and_then(|path| File::open(path).map_err_into(MEK::IOError))
+                    .and_then(|mut file| {
+                        let mut s = String::new();
+                        file.read_to_string(&mut s)
+                            .map(|_| s)
+                            .map_err_into(MEK::IOError)
+                    })
+                    .map(Buffer::from)
+                    .map(|buffer| Mail(reference, buffer))
+            })
+    }
+
+    /// Opens a mail by the passed hash
+    pub fn open<S: AsRef<str>>(store: &Store, hash: S) -> Result<Option<Mail>> {
+        Ref::get_by_hash(store, String::from(hash.as_ref()))
+            .map_err_into(MEK::FetchByHashError)
+            .map_err_into(MEK::FetchError)
+            .and_then(|o| match o {
+                Some(r) => Mail::from_ref(r).map(Some),
+                None => Ok(None),
+            })
+
+    }
+
+    /// Implement me as TryFrom as soon as it is stable
+    pub fn from_ref(r: Ref<'a>) -> Result<Mail> {
+        r.fs_file()
+            .map_err_into(MEK::RefHandlingError)
+            .and_then(|path| File::open(path).map_err_into(MEK::IOError))
+            .and_then(|mut file| {
+                let mut s = String::new();
+                file.read_to_string(&mut s)
+                    .map(|_| s)
+                    .map_err_into(MEK::IOError)
+            })
+            .map(Buffer::from)
+            .map(|buffer| Mail(r, buffer))
+    }
+
+    pub fn get_field(&self, field: &str) -> Result<Option<String>> {
+        self.1
+            .parsed()
+            .map_err_into(MEK::MailParsingError)
+            .map(|parsed| {
+                parsed.headers
+                    .iter()
+                    .filter(|hdr| hdr.name == field)
+                    .nth(0)
+                    .and_then(|field| field.get_value().ok())
+            })
+    }
+
+    pub fn get_from(&self) -> Result<Option<String>> {
+        self.get_field("From")
+    }
+
+    pub fn get_to(&self) -> Result<Option<String>> {
+        self.get_field("To")
+    }
+
+    pub fn get_subject(&self) -> Result<Option<String>> {
+        self.get_field("Subject")
+    }
+
+    pub fn get_message_id(&self) -> Result<Option<String>> {
+        self.get_field("Message-ID")
+    }
+
+    pub fn get_in_reply_to(&self) -> Result<Option<String>> {
+        self.get_field("In-Reply-To")
+    }
+
+}