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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 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 Iterator<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_single_char(mut source: impl BufRead) -> io::Result<char> {
let mut buf = String::new();
source.read_line(&mut buf)?;
buf.chars().next().ok_or_else(|| io::Error::new(io::ErrorKind::Other, "calendar has no path"))
}
pub fn read_single_char_from_stdin() -> io::Result<char> {
let stdin = std::io::stdin();
let stdinlock = stdin.lock();
read_single_char(stdinlock)
}
#[cfg(not(test))]
pub fn read_lines_from_stdin() -> io::Result<Vec<String>> {
let stdin = io::stdin();
let lines = stdin.lock().lines();
lines.collect()
}
#[cfg(test)]
pub fn read_lines_from_stdin() -> io::Result<Vec<String>> {
use testutils;
let lines = testutils::test_stdin_clear();
Ok(lines)
}
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 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");
}
#[test]
fn read_single_char_test() {
let source = "ab".as_bytes();
let read_char = read_single_char(source).unwrap();
assert_eq!('a', read_char);
}
}
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