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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2018 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 error::Result;
use error::GPSErrorKind as GPSEK;
use error::ResultExt;
use types::*;
use libimagstore::store::Entry;
use toml_query::read::TomlValueReadExt;
use toml_query::insert::TomlValueInsertExt;
use toml_query::delete::TomlValueDeleteExt;
pub trait GPSEntry {
fn set_coordinates(&mut self, c: Coordinates) -> Result<()>;
fn get_coordinates(&self) -> Result<Option<Coordinates>>;
/// Remove the coordinates from the entry
///
/// # Returns
///
/// The return type is a bit complicated, but that has a reason:
///
/// The outer Result<_> is used for notifying a failure during the header read/write action.
/// If the Option<_> is Some(_), the value was deleted.
/// The inner Result<_> is used for parsing failures during the parsing of the deleted value.
///
/// So:
///
/// * Ok(Some(Ok(_))) if the coordinates were deleted, returning the deleted value
/// * Ok(Some(Err(_))) if the coordinates were deleted, but the deleted value couldn't be parsed
/// * Ok(None) if there were no coordinates to delete
/// * Err(e) if the deleting failed
///
fn remove_coordinates(&mut self) -> Result<Option<Result<Coordinates>>>;
}
impl GPSEntry for Entry {
fn set_coordinates(&mut self, c: Coordinates) -> Result<()> {
self.get_header_mut()
.insert("gps.coordinates", c.into())
.map(|_| ())
.chain_err(|| GPSEK::HeaderWriteError)
}
fn get_coordinates(&self) -> Result<Option<Coordinates>> {
match self.get_header().read("gps.coordinates").chain_err(|| GPSEK::HeaderWriteError)? {
Some(hdr) => Coordinates::from_value(hdr).map(Some),
None => Ok(None),
}
}
fn remove_coordinates(&mut self) -> Result<Option<Result<Coordinates>>> {
let coordinates = self.get_coordinates();
let patterns = [
"gps.coordinates.latitude.degree",
"gps.coordinates.latitude.minutes",
"gps.coordinates.latitude.seconds",
"gps.coordinates.longitude.degree",
"gps.coordinates.longitude.minutes",
"gps.coordinates.longitude.seconds",
"gps.coordinates.latitude",
"gps.coordinates.longitude",
"gps.coordinates",
"gps",
];
let hdr = self.get_header_mut();
for pattern in patterns.iter() {
let _ = hdr.delete(pattern).chain_err(|| GPSEK::HeaderWriteError)?;
}
match coordinates {
Ok(None) => Ok(None),
Ok(Some(some)) => Ok(Some(Ok(some))),
Err(e) => Ok(Some(Err(e))),
}
}
}
#[cfg(test)]
mod tests {
use std::path::PathBuf;
use libimagstore::store::Store;
use entry::*;
fn setup_logging() {
let _ = ::env_logger::try_init;
}
fn get_store() -> Store {
use libimagstore::file_abstraction::InMemoryFileAbstraction;
let backend = Box::new(InMemoryFileAbstraction::default());
Store::new_with_backend(PathBuf::from("/"), &None, backend).unwrap()
}
#[test]
fn test_set_gps() {
setup_logging();
let store = get_store();
let mut entry = store.create(PathBuf::from("test_set_gps")).unwrap();
let coordinates = Coordinates {
latitude: GPSValue::new(0, 0, 0),
longitude: GPSValue::new(0, 0, 0),
};
let res = entry.set_coordinates(coordinates);
assert!(res.is_ok());
}
#[test]
fn test_setget_gps() {
setup_logging();
let store = get_store();
let mut entry = store.create(PathBuf::from("test_setget_gps")).unwrap();
let coordinates = Coordinates {
latitude: GPSValue::new(0, 0, 0),
longitude: GPSValue::new(0, 0, 0),
};
let res = entry.set_coordinates(coordinates);
assert!(res.is_ok());
let coordinates = entry.get_coordinates();
assert!(coordinates.is_ok());
let coordinates = coordinates.unwrap();
assert!(coordinates.is_some());
let coordinates = coordinates.unwrap();
assert_eq!(0, coordinates.longitude.degree);
assert_eq!(0, coordinates.longitude.minutes);
assert_eq!(0, coordinates.longitude.seconds);
assert_eq!(0, coordinates.latitude.degree);
assert_eq!(0, coordinates.latitude.minutes);
assert_eq!(0, coordinates.latitude.seconds);
}
}
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