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|
use std::cmp;
use std::fs;
use std::time;
use crate::structs;
#[derive(Debug, Clone)]
pub enum SortType {
SortNatural,
SortMtime,
}
#[derive(Debug, Clone)]
pub struct SortOption {
pub show_hidden: bool,
pub directories_first: bool,
pub case_sensitive: bool,
pub reverse: bool,
pub sort_method: SortType,
}
impl SortOption {
pub fn compare_func(
&self,
) -> impl Fn(&structs::JoshutoDirEntry, &structs::JoshutoDirEntry) -> std::cmp::Ordering {
let base_cmp = match self.sort_method {
SortType::SortNatural => {
if self.case_sensitive {
natural_sort
} else {
natural_sort_case_insensitive
}
}
SortType::SortMtime => mtime_sort,
};
let rev_cmp = if self.reverse {
reverse_ordering
} else {
dummy_reverse
};
let dir_cmp = if self.directories_first {
dir_first
} else {
dummy_dir_first
};
move |f1, f2| dir_cmp(f1, f2).unwrap_or_else(|| rev_cmp(base_cmp(f1, f2)))
}
pub fn filter_func(&self) -> fn(&Result<fs::DirEntry, std::io::Error>) -> bool {
if self.show_hidden {
no_filter
} else {
filter_hidden
}
}
}
const fn no_filter(_: &Result<fs::DirEntry, std::io::Error>) -> bool {
true
}
fn filter_hidden(result: &Result<fs::DirEntry, std::io::Error>) -> bool {
match result {
Err(_) => false,
Ok(entry) => {
let file_name = entry.file_name();
if let Some(file_name) = file_name.to_str() {
!file_name.starts_with(".")
} else {
false
}
}
}
}
pub fn map_entry_default(
result: Result<fs::DirEntry, std::io::Error>,
) -> Option<structs::JoshutoDirEntry> {
match result {
Ok(direntry) => match structs::JoshutoDirEntry::from(&direntry) {
Ok(s) => Some(s),
Err(_) => None,
},
Err(_) => None,
}
}
const fn dummy_dir_first(
_: &structs::JoshutoDirEntry,
_: &structs::JoshutoDirEntry,
) -> Option<cmp::Ordering> {
None
}
fn dir_first(
f1: &structs::JoshutoDirEntry,
f2: &structs::JoshutoDirEntry,
) -> Option<cmp::Ordering> {
let f1_isdir = f1.path.is_dir();
let f2_isdir = f2.path.is_dir();
if f1_isdir && !f2_isdir {
Some(cmp::Ordering::Less)
} else if !f1_isdir && f2_isdir {
Some(cmp::Ordering::Greater)
} else {
None
}
}
const fn dummy_reverse(c: cmp::Ordering) -> cmp::Ordering {
c
}
fn reverse_ordering(c: cmp::Ordering) -> cmp::Ordering {
match c {
cmp::Ordering::Less => cmp::Ordering::Greater,
cmp::Ordering::Greater => cmp::Ordering::Less,
x => x,
}
}
fn natural_sort_case_insensitive(
f1: &structs::JoshutoDirEntry,
f2: &structs::JoshutoDirEntry,
) -> cmp::Ordering {
let f1_name = f1.file_name_as_string.to_lowercase();
let f2_name = f2.file_name_as_string.to_lowercase();
if f1_name <= f2_name {
cmp::Ordering::Less
} else {
cmp::Ordering::Greater
}
}
fn natural_sort(f1: &structs::JoshutoDirEntry, f2: &structs::JoshutoDirEntry) -> cmp::Ordering {
if f1.file_name <= f2.file_name {
cmp::Ordering::Less
} else {
cmp::Ordering::Greater
}
}
fn mtime_sort(file1: &structs::JoshutoDirEntry, file2: &structs::JoshutoDirEntry) -> cmp::Ordering {
fn compare(
file1: &structs::JoshutoDirEntry,
file2: &structs::JoshutoDirEntry,
) -> Result<cmp::Ordering, std::io::Error> {
let f1_meta: fs::Metadata = std::fs::metadata(&file1.path)?;
let f2_meta: fs::Metadata = std::fs::metadata(&file2.path)?;
let f1_mtime: time::SystemTime = f1_meta.modified()?;
let f2_mtime: time::SystemTime = f2_meta.modified()?;
Ok(if f1_mtime >= f2_mtime {
cmp::Ordering::Less
} else {
cmp::Ordering::Greater
})
}
compare(&file1, &file2).unwrap_or(cmp::Ordering::Less)
}
|
