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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::PathBuf;
use error::RefErrorKind as REK;
use error::RefError as RE;
use error::Result;
use error::ResultExt;
use libimagstore::store::Entry;
use toml::Value;
use toml_query::read::TomlValueReadExt;
/// Creates a Hash from a PathBuf by making the PathBuf absolute and then running a hash
/// algorithm on it
pub fn hash_path(pb: &PathBuf) -> Result<String> {
use crypto::sha1::Sha1;
use crypto::digest::Digest;
match pb.to_str() {
Some(s) => {
let mut hasher = Sha1::new();
hasher.input_str(s);
Ok(hasher.result_str())
},
None => return Err(RE::from_kind(REK::PathUTF8Error)),
}
}
/// Read the reference from a file
pub fn read_reference(refentry: &Entry) -> Result<PathBuf> {
match refentry.get_header().read("ref.path") {
Ok(Some(&Value::String(ref s))) => Ok(PathBuf::from(s)),
Ok(Some(_)) => Err(RE::from_kind(REK::HeaderTypeError)),
Ok(None) => Err(RE::from_kind(REK::HeaderFieldMissingError)),
Err(e) => Err(e).chain_err(|| REK::StoreReadError),
}
}
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