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|
use crate::io::{BufWriter, Write};
use std::convert::TryInto;
use crate::config::Config;
pub type Range = (Option<u32>, Option<u32>);
#[derive(Debug)]
pub enum Choice {
Field(u32),
FieldRange(Range),
}
impl Choice {
pub fn print_choice(
&self,
line: &String,
config: &Config,
handle: &mut BufWriter<std::io::StdoutLock>,
) {
write!(handle, "{}", self.get_choice_slice(line, config).join(" "));
}
pub fn is_reverse_range(&self) -> bool {
match self {
Choice::Field(_) => false,
Choice::FieldRange(r) => match r {
(Some(start), Some(end)) => end < start,
_ => false,
},
}
}
fn get_choice_slice<'a>(&self, line: &'a String, config: &Config) -> Vec<&'a str> {
let words = config
.separator
.split(line)
.into_iter()
.filter(|s| !s.is_empty())
.enumerate();
let mut slices = match self {
Choice::Field(i) => words
.filter(|x| x.0 == *i as usize)
.map(|x| x.1)
.collect::<Vec<&str>>(),
Choice::FieldRange(r) => match r {
(None, None) => words.map(|x| x.1).collect::<Vec<&str>>(),
(Some(start), None) => words
.filter(|x| x.0 >= (*start).try_into().unwrap())
.map(|x| x.1)
.collect::<Vec<&str>>(),
(None, Some(end)) => {
let e: usize = if config.opt.exclusive {
(end - 1).try_into().unwrap()
} else {
(*end).try_into().unwrap()
};
words
.filter(|x| x.0 <= e)
.map(|x| x.1)
.collect::<Vec<&str>>()
}
(Some(start), Some(end)) => {
let e: usize = if config.opt.exclusive {
(end - 1).try_into().unwrap()
} else {
(*end).try_into().unwrap()
};
words
.filter(|x| {
(x.0 <= e && x.0 >= (*start).try_into().unwrap())
|| self.is_reverse_range()
&& (x.0 >= e && x.0 <= (*start).try_into().unwrap())
})
.map(|x| x.1)
.collect::<Vec<&str>>()
}
},
};
if self.is_reverse_range() {
slices.reverse();
}
return slices;
}
}
#[cfg(test)]
mod tests {
use crate::config::{Config, Opt};
use std::ffi::OsString;
use structopt::StructOpt;
impl Config {
pub fn from_iter<I>(iter: I) -> Self
where
I: IntoIterator,
I::Item: Into<OsString> + Clone,
{
return Config::new(Opt::from_iter(iter));
}
}
mod get_choice_slice_tests {
use super::*;
#[test]
fn print_0() {
let config = Config::from_iter(vec!["choose", "0"]);
assert_eq!(
vec!["rust"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
}
#[test]
fn print_after_end() {
let config = Config::from_iter(vec!["choose", "10"]);
assert_eq!(
Vec::<&str>::new(),
config.opt.choice[0]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
}
#[test]
fn print_out_of_order() {
let config = Config::from_iter(vec!["choose", "3", "1"]);
assert_eq!(
vec!["cool"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
assert_eq!(
vec!["is"],
config.opt.choice[1]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
}
#[test]
fn print_1_to_3_exclusive() {
let config = Config::from_iter(vec!["choose", "1:3", "-x"]);
assert_eq!(
vec!["is", "pretty"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
}
#[test]
fn print_1_to_3() {
let config = Config::from_iter(vec!["choose", "1:3" ]);
assert_eq!(
vec!["is", "pretty", "cool"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust is pretty cool"), &config)
);
}
#[test]
fn print_1_to_3_separated_by_hashtag() {
let config = Config::from_iter(vec!["choose", "1:3", "-f", "#"]);
assert_eq!(
vec!["is", "pretty", "cool"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust#is#pretty#cool"), &config)
);
}
#[test]
fn print_1_to_3_separated_by_varying_multiple_hashtag_exclusive() {
let config = Config::from_iter(vec!["choose", "1:3", "-f", "#", "-x"]);
assert_eq!(
vec!["is", "pretty"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust##is###pretty####cool"), &config)
);
}
#[test]
fn print_1_to_3_separated_by_varying_multiple_hashtag() {
let config = Config::from_iter(vec!["choose", "1:3", "-f", "#"]);
assert_eq!(
vec!["is", "pretty", "cool"],
config.opt.choice[0]
.get_choice_slice(&String::from("rust##is###pretty####cool"), &config)
);
}
#[test]
fn print_1_to_3_separated_by_regex_group_vowels_exclusive() {
let config = Config::from_iter(vec!["choose", "1:3", "-f", "[aeiou]", "-x"]);
assert_eq!(
vec![" q", "ck br"],
config.opt.choice[0].get_choice_slice(
&String::from("the quick brown fox jumped over the lazy dog"),
&config
)
);
}
#[test]
fn print_1_to_3_separated_by_regex_group_vowels() {
let config = Config::from_iter(vec!["choose", "1:3", "-f", "[aeiou]"]);
assert_eq!(
vec![" q", "ck br", "wn f"],
config.opt.choice[0].get_choice_slice(
&String::from("the quick brown fox jumped over the lazy dog"),
&config
)
);
}
#[test]
fn print_3_to_1() {
let config = Config::from_iter(vec!["choose", "3:1"]);
assert_eq!(
vec!["pretty", "is", "lang"],
config.opt.choice[0].get_choice_slice(
&String::from("rust lang is pretty darn cool"),
&config
)
);
}
}
mod is_reverse_range_tests {
use super::*;
#[test]
fn is_field_reversed() {
let config = Config::from_iter(vec!["choose", "0"]);
assert_eq!(false, config.opt.choice[0].is_reverse_range());
}
#[test]
fn is_field_range_no_star
|
