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initial implementation

This commit is contained in:
Robin Appelman 2019-11-21 22:38:25 +01:00
commit c8408bc2bb
3 changed files with 384 additions and 4 deletions

201
Cargo.lock generated Normal file
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@ -0,0 +1,201 @@
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@ -4,6 +4,9 @@ version = "0.1.0"
authors = ["Robin Appelman <robin@icewind.nl>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
csv = "1.1"
serde = { version = "1", features = ["derive"] }
pico-args = "0.3.0"
home = "0.5.1"
main_error = "0.1.0"

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@ -1,3 +1,179 @@
fn main() {
println!("Hello, world!");
use serde::{Deserialize, Serialize};
use std::cmp::Ordering;
use std::time::{SystemTime, UNIX_EPOCH};
use main_error::MainError;
#[derive(Debug, Deserialize, Serialize)]
struct History {
path: String,
rank: f64,
time: u64,
}
#[derive(Clone, Copy)]
enum SortBy {
Frecent,
Time,
Rank,
}
struct Args {
add: bool,
list: bool,
help: bool,
sort: SortBy,
filter: Vec<String>,
}
impl Args {
pub fn from_env() -> Self {
let mut args = pico_args::Arguments::from_env();
Args {
add: args.contains("--add"),
help: args.contains(["-h", "--help"]),
sort: if args.contains("-t") {
SortBy::Time
} else if args.contains("-r") {
SortBy::Rank
} else {
SortBy::Frecent
},
list: args.contains("-l"),
filter: args.free().unwrap_or_default(),
}
}
}
const HOUR: u64 = 3600;
const DAY: u64 = 86_400;
const WEEK: u64 = 604_800;
impl History {
pub fn frecent(&self, current_time: u64) -> f64 {
match current_time - self.time {
age if age < HOUR => self.rank * 4.0,
age if age < DAY => self.rank * 2.0,
age if age < WEEK => self.rank / 2.0,
_ => self.rank / 4.0,
}
}
pub fn matches(&self, pattern: &[String]) -> bool {
pattern.iter().all(|pat| self.path.contains(pat))
}
pub fn get_sort(&self, sort: SortBy, current_time: u64) -> f64 {
match sort {
SortBy::Rank => self.rank,
SortBy::Time => self.time as f64,
SortBy::Frecent => self.frecent(current_time),
}
}
}
fn now() -> u64 {
let start = SystemTime::now();
start
.duration_since(UNIX_EPOCH)
.expect("Time went backwards")
.as_secs()
}
fn main() -> Result<(), MainError> {
let args = Args::from_env();
let home = home::home_dir().expect("Cant get home directory");
let history_path = home.join(".z");
let mut reader = csv::ReaderBuilder::new()
.delimiter(b'|')
.has_headers(false)
.from_path(history_path.clone())
.unwrap();
let now = now();
if args.help {
println!("zox [-h][-l][-r][-t] args");
return Ok(());
}
let history = reader
.deserialize::<History>()
.filter_map(|result| result.ok());
if args.add {
let home = home.to_str().expect("Home path not valid utf8").to_string();
let mut history: Vec<_> = history.collect();
for path in args.filter {
if path != home {
let mut existing = false;
for item in history.iter_mut() {
if item.path == path {
item.rank += 1.0;
item.time = now;
existing = true;
}
}
if !existing {
history.push(History {
path,
rank: 1.0,
time: now,
})
}
dbg!(existing);
}
}
let total = history.iter().fold(0.0, |sum, item| sum + item.rank);
if total > 9000.0 {
for item in history.iter_mut() {
item.rank *= 0.99;
}
}
let mut writer = csv::WriterBuilder::new()
.delimiter(b'|')
.has_headers(false)
.from_path(history_path)?;
for item in history.into_iter().filter(|item| item.rank >= 1.0) {
writer.serialize(item).unwrap();
}
writer.flush()?;
return Ok(());
}
let matches = history.filter(|item| item.matches(&args.filter));
if args.list {
for item in matches {
println!("{:<11}{}", item.get_sort(args.sort, now), item.path);
}
} else {
let mut matches: Vec<History> = matches.collect();
matches.sort_by(
|a, b| match a.get_sort(args.sort, now) - b.get_sort(args.sort, now) {
diff if diff < 0.0 => Ordering::Greater,
diff if diff > 0.0 => Ordering::Less,
_ => Ordering::Equal,
},
);
if let Some(first) = matches.first() {
println!("{}", first.path);
}
}
Ok(())
}