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use std::ops::Index;
use std::error::Error;
use std::path::PathBuf;
use std::ffi::OsStr;
use std::cmp::{Ord, Ordering};
use std::time::SystemTime;
use lscolors::{LsColors, Style};
lazy_static! {
static ref COLORS: LsColors = LsColors::from_env().unwrap();
}
#[derive(PartialEq)]
pub struct Files {
pub files: Vec<File>,
pub sort: SortBy,
pub dirs_first: bool,
}
impl Index<usize> for Files {
type Output = File;
fn index(&self, pos: usize) -> &Self::Output {
&self.files[pos]
}
}
fn get_kind(file: &std::fs::DirEntry) -> Kind {
let file = file.file_type().unwrap();
if file.is_file() { return Kind::File; }
if file.is_dir() { return Kind::Directory; }
if file.is_symlink() { return Kind::Link; }
Kind::Pipe
}
impl Files {
pub fn new_from_path<S: AsRef<OsStr> + Sized>(path: S)
-> Result<Files, Box<dyn Error>>
where S: std::convert::AsRef<std::path::Path> {
let mut files = Vec::new();
for file in std::fs::read_dir(path)? {
let file = file?;
let name = file.file_name();
let name = name.to_string_lossy();
let kind = get_kind(&file);
let path = file.path();
let meta = file.metadata()?;
let size = meta.len() / 1024;
let mtime = meta.modified()?;
let style
= match COLORS.style_for_path_with_metadata(file.path(), Some(&meta)) {
Some(style) => Some(style.clone()),
None => None
};
let file = File::new(&name, path, kind, size as usize, mtime, style);
files.push(file)
}
let mut files = Files { files: files,
sort: SortBy::Name,
dirs_first: true };
files.sort();
Ok(files)
}
pub fn sort(&mut self) {
match self.sort {
SortBy::Name => {
self.files.sort_by(|a,b| {
alphanumeric_sort::compare_str(&a.name, &b.name)
})
},
SortBy::Size => {
self.files.sort_by(|a,b| {
if a.size == b.size {
return alphanumeric_sort::compare_str(&b.name, &a.name)
}
a.size.cmp(&b.size).reverse()
});
},
SortBy::MTime => {
self.files.sort_by(|a,b| {
if a.mtime == b.mtime {
return alphanumeric_sort::compare_str(&a.name, &b.name)
}
a.mtime.cmp(&b.mtime)
});
}
};
if self.dirs_first {
self.files.sort_by(|a,b| {
if a.is_dir() && !b.is_dir() {
Ordering::Less
} else { Ordering::Equal }
});
}
}
pub fn cycle_sort(&mut self) {
self.sort = match self.sort {
SortBy::Name => SortBy::Size,
SortBy::Size => SortBy::MTime,
SortBy::MTime => SortBy::Name
};
}
pub fn iter(&self) -> std::slice::Iter<File> {
self.files.iter()
}
pub fn len(&self) -> usize {
self.files.len()
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum Kind {
Directory,
File,
Link,
Pipe
}
impl std::fmt::Display for SortBy {
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_> )
-> Result<(), std::fmt::Error> {
let text = match self {
SortBy::Name => "name",
SortBy::Size => "size",
SortBy::MTime => "mtime"
};
write!(formatter, "{}", text)
}
}
#[derive(Debug,Copy,Clone,PartialEq)]
pub enum SortBy {
Name,
Size,
MTime,
}
#[derive(Debug, PartialEq, Clone)]
pub struct File {
pub name: String,
pub path: PathBuf,
pub size: Option<usize>,
pub kind: Kind,
pub mtime: SystemTime,
pub style: Option<Style>,
// owner: Option<String>,
// group: Option<String>,
// flags: Option<String>,
}
impl File {
pub fn new(name: &str,
path: PathBuf,
kind: Kind,
size: usize,
mtime: SystemTime,
style: Option<Style>) -> File {
File {
name: name.to_string(),
path: path,
size: Some(size),
kind: kind,
mtime: mtime,
style: style
// owner: None,
// group: None,
// flags: None,
}
}
pub fn calculate_size(&self) -> (usize, String) {
let mut unit = 0;
let mut size = self.size.unwrap();
while size > 1024 {
size /= 1024;
unit += 1;
}
let unit = match unit {
0 => "",
1 => " KB",
2 => " GB",
3 => " TB",
4 => "wtf are you doing",
_ => ""
}.to_string();
(size, unit)
}
pub fn grand_parent(&self) -> Option<PathBuf> {
Some(self.path.parent()?.parent()?.to_path_buf())
}
pub fn is_dir(&self) -> bool {
self.kind == Kind::Directory
}
pub fn path(&self) -> PathBuf {
self.path.clone()
}
}
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