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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 std::path::PathBuf;
use std::fmt::Debug;
use std::collections::HashMap;
use error::StoreError as SE;
use store::Entry;
use storeid::StoreId;
mod fs;
mod inmemory;
mod iter;
pub mod stdio;
pub use self::fs::FSFileAbstraction;
pub use self::fs::FSFileAbstractionInstance;
pub use self::inmemory::InMemoryFileAbstraction;
pub use self::inmemory::InMemoryFileAbstractionInstance;
use self::iter::PathIterator;
/// An abstraction trait over filesystem actions
pub trait FileAbstraction : Debug {
fn remove_file(&self, path: &PathBuf) -> Result<(), SE>;
fn copy(&self, from: &PathBuf, to: &PathBuf) -> Result<(), SE>;
fn rename(&self, from: &PathBuf, to: &PathBuf) -> Result<(), SE>;
fn create_dir_all(&self, _: &PathBuf) -> Result<(), SE>;
fn exists(&self, &PathBuf) -> Result<bool, SE>;
fn is_file(&self, &PathBuf) -> Result<bool, SE>;
fn new_instance(&self, p: PathBuf) -> Box<FileAbstractionInstance>;
fn drain(&self) -> Result<Drain, SE>;
fn fill<'a>(&'a mut self, d: Drain) -> Result<(), SE>;
fn pathes_recursively(&self, basepath: PathBuf) -> Result<PathIterator, SE>;
}
/// An abstraction trait over actions on files
pub trait FileAbstractionInstance : Debug {
/// Get the contents of the FileAbstractionInstance, as Entry object.
///
/// The `StoreId` is passed because the backend does not know where the Entry lives, but the
/// Entry type itself must be constructed with the id.
fn get_file_content(&mut self, id: StoreId) -> Result<Entry, SE>;
fn write_file_content(&mut self, buf: &Entry) -> Result<(), SE>;
}
pub struct Drain(HashMap<PathBuf, Entry>);
impl Drain {
pub fn new(hm: HashMap<PathBuf, Entry>) -> Drain {
Drain(hm)
}
pub fn empty() -> Drain {
Drain::new(HashMap::new())
}
pub fn iter<'a>(&'a mut self) -> DrainIter<'a> {
DrainIter(self.0.drain())
}
}
pub struct DrainIter<'a>(::std::collections::hash_map::Drain<'a, PathBuf, Entry>);
impl<'a> Iterator for DrainIter<'a> {
type Item = (PathBuf, Entry);
fn next(&mut self) -> Option<Self::Item> {
self.0.next()
}
}
#[cfg(test)]
mod test {
use std::path::PathBuf;
use super::FileAbstractionInstance;
use super::inmemory::InMemoryFileAbstraction;
use super::inmemory::InMemoryFileAbstractionInstance;
use storeid::StoreId;
use store::Entry;
#[test]
fn lazy_file() {
let fs = InMemoryFileAbstraction::new();
let mut path = PathBuf::from("tests");
path.set_file_name("test1");
let mut lf = InMemoryFileAbstractionInstance::new(fs.backend().clone(), path.clone());
let loca = StoreId::new_baseless(path).unwrap();
let file = Entry::from_str(loca.clone(), r#"---
[imag]
version = "0.6.0"
---
Hello World"#).unwrap();
lf.write_file_content(&file).unwrap();
let bah = lf.get_file_content(loca).unwrap();
assert_eq!(bah.get_content(), "Hello World");
}
}
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