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use std::{fs, path};
use crate::fs::{JoshutoDirEntry, JoshutoMetadata};
use crate::util::sort::SortOption;
#[derive(Debug)]
pub struct JoshutoDirList {
pub index: Option<usize>,
path: path::PathBuf,
content_outdated: bool,
order_outdated: bool,
pub metadata: JoshutoMetadata,
pub contents: Vec<JoshutoDirEntry>,
}
impl JoshutoDirList {
pub fn new(path: path::PathBuf, sort_option: &SortOption) -> std::io::Result<Self> {
let filter_func = sort_option.filter_func();
let mut contents = read_dir_list(path.as_path(), filter_func)?;
let compare_func = sort_option.compare_func();
contents.sort_by(compare_func);
let index = if contents.is_empty() { None } else { Some(0) };
let metadata = JoshutoMetadata::from(&path)?;
Ok(Self {
index,
path,
content_outdated: false,
order_outdated: false,
metadata,
contents,
})
}
pub fn depreciate(&mut self) {
self.content_outdated = true;
}
pub fn need_update(&self) -> bool {
self.content_outdated
}
pub fn file_path(&self) -> &path::PathBuf {
&self.path
}
pub fn reload_contents(&mut self, sort_option: &SortOption) -> std::io::Result<()> {
let filter_func = sort_option.filter_func();
let mut contents = read_dir_list(&self.path, filter_func)?;
let sort_func = sort_option.compare_func();
contents.sort_by(sort_func);
let contents_len = contents.len();
let index: Option<usize> = {
if contents_len == 0 {
None
} else {
match self.index {
Some(i) if i >= contents_len => Some(contents_len - 1),
Some(i) => {
let entry = &self.contents[i];
contents
.iter()
.enumerate()
.find(|(_, e)| e.file_name() == entry.file_name())
.map(|(i, _)| i)
.or(Some(i))
}
None => Some(0),
}
}
};
let metadata = JoshutoMetadata::from(&self.path)?;
self.metadata = metadata;
self.contents = contents;
self.index = index;
self.content_outdated = false;
Ok(())
}
pub fn selected_entries(&self) -> impl Iterator<Item = &JoshutoDirEntry> {
self.contents.iter().filter(|entry| entry.is_selected())
}
pub fn get_selected_paths(&self) -> Vec<&path::PathBuf> {
let vec: Vec<&path::PathBuf> = self.selected_entries().map(|e| e.file_path()).collect();
if !vec.is_empty() {
vec
} else {
match self.get_curr_ref() {
Some(s) => vec![s.file_path()],
_ => vec![],
}
}
}
pub fn get_curr_ref(&self) -> Option<&JoshutoDirEntry> {
self.get_curr_ref_(self.index?)
}
pub fn get_curr_mut(&mut self) -> Option<&mut JoshutoDirEntry> {
self.get_curr_mut_(self.index?)
}
fn get_curr_mut_(&mut self, index: usize) -> Option<&mut JoshutoDirEntry> {
if index < self.contents.len() {
Some(&mut self.contents[index])
} else {
None
}
}
fn get_curr_ref_(&self, index: usize) -> Option<&JoshutoDirEntry> {
if index < self.contents.len() {
Some(&self.contents[index])
} else {
None
}
}
}
fn read_dir_list<F>(path: &path::Path, filter_func: F) -> std::io::Result<Vec<JoshutoDirEntry>>
where
F: Fn(&Result<fs::DirEntry, std::io::Error>) -> bool,
{
let results: Vec<JoshutoDirEntry> = fs::read_dir(path)?
.filter(filter_func)
.filter_map(map_entry_default)
.collect();
Ok(results)
}
fn map_entry_default(result: std::io::Result<fs::DirEntry>) -> Option<JoshutoDirEntry> {
match result {
Ok(direntry) => match JoshutoDirEntry::from(&direntry) {
Ok(s) => Some(s),
Err(_) => None,
},
Err(_) => None,
}
}
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