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use std::io::prelude::*;
use std::io::{BufRead, BufReader};
use std::path::{Path, PathBuf};
use std::{fs, io};
use std::fs::OpenOptions;
use crate::icalwrap::IcalVCalendar;
pub fn file_iter(dir: &Path) -> impl Iterator<Item = PathBuf> {
use walkdir::WalkDir;
WalkDir::new(dir).into_iter()
.filter_map(|e| e.ok())
.filter(|e| e.file_type().is_file())
.map(|entry| entry.into_path())
}
pub fn dir_iter(dir: &Path) -> impl Iterator<Item = PathBuf> {
use walkdir::WalkDir;
let dir = dir.to_path_buf();
WalkDir::new(&dir).into_iter()
.filter_map(|e| e.ok())
.filter(|e| e.file_type().is_dir())
.filter(move |f| f.path() != dir)
.map(|entry| entry.into_path())
}
pub fn write_file(filepath: &Path, contents: &str) -> io::Result<()> {
let mut file = fs::File::create(filepath)?;
file.write_all(contents.as_bytes())
}
pub fn append_file(filepath: &Path, contents: &str) -> io::Result<()> {
let mut file = OpenOptions::new()
.append(true)
.create(true)
.open(filepath)?;
file.write_all(contents.as_bytes())
}
pub fn write_cal(cal: &IcalVCalendar) -> io::Result<()> {
match cal.get_path() {
Some(path) => write_file(&path, &cal.to_string()),
None => Err(io::Error::new(io::ErrorKind::Other, "calendar has no path")),
}
}
pub fn read_lines_from_file(filepath: &Path) -> io::Result<impl DoubleEndedIterator<Item = String>> {
let f = fs::File::open(filepath)?;
let f = BufReader::new(f);
let lines: Result<Vec<String>, io::Error> = f.lines().collect();
lines.map(|result| result.into_iter())
}
pub fn read_file_to_string(path: &Path) -> io::Result<String> {
let mut file = fs::File::open(&path)?;
let mut contents = String::new();
file.read_to_string(&mut contents)?;
Ok(contents)
}
#[cfg(test)]
mod tests {
use super::*;
use crate::testutils::prepare_testdir;
use assert_fs::prelude::*;
#[test]
fn test_append_file() {
let testdir = prepare_testdir("testdir");
let file = testdir.child("f");
append_file(file.path(), "x\ny\n").unwrap();
file.assert("x\ny\n");
append_file(file.path(), "z\n").unwrap();
file.assert("x\ny\nz\n");
}
#[test]
fn test_write_file() {
let testdir = prepare_testdir("testdir");
let file = testdir.child("f");
write_file(file.path(), "x\ny\n").unwrap();
file.assert("x\ny\n");
write_file(file.path(), "z\n").unwrap();
file.assert("z\n");
}
}
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