136 lines
4.3 KiB
Rust
136 lines
4.3 KiB
Rust
use super::Cmd;
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use clap::{value_parser, Arg, ArgAction, Command};
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use data_encoding::BASE32;
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use shitbox::args;
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use std::{
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error::Error,
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fs,
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io::{self, Read, Write},
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};
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use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
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#[derive(Debug, Default)]
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pub struct Base32;
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impl Cmd for Base32 {
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fn cli(&self) -> clap::Command {
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Command::new("base32")
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.author("Nathan Fisher")
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.about("Base32 encode/decode data and print to standard output")
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.args(args())
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}
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fn run(&self, matches: &clap::ArgMatches) -> Result<(), Box<dyn std::error::Error>> {
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let color = match matches.get_one::<String>("color").map(String::as_str) {
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Some("always") => ColorChoice::Always,
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Some("ansi") => ColorChoice::AlwaysAnsi,
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Some("auto") => {
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if atty::is(atty::Stream::Stdout) {
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ColorChoice::Auto
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} else {
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ColorChoice::Never
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}
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}
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_ => ColorChoice::Never,
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};
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if let Some(files) = matches.get_many::<String>("file") {
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let (len, _) = files.size_hint();
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for (index, file) in files.into_iter().enumerate() {
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if { len > 1 || matches.get_flag("verbose") } && !matches.get_flag("QUIET") {
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let mut stdout = StandardStream::stdout(color);
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stdout.set_color(ColorSpec::new().set_fg(Some(Color::Green)))?;
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match index {
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0 => writeln!(stdout, "===> {file} <==="),
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_ => writeln!(stdout, "\n===> {file} <==="),
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}?;
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stdout.reset()?;
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} else if index > 0 {
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println!();
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}
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let contents = get_contents(file)?;
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if matches.get_flag("DECODE") {
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decode_base32(contents, matches.get_flag("IGNORE"))?;
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} else {
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encode_base32(
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&contents,
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match matches.get_one::<usize>("WRAP") {
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Some(c) => *c,
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None => {
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return Err(
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io::Error::new(io::ErrorKind::Other, "Invalid wrap").into()
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)
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}
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},
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);
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}
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}
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}
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Ok(())
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}
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fn path(&self) -> Option<shitbox::Path> {
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Some(shitbox::Path::UsrBin)
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}
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}
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pub fn args() -> [Arg; 7] {
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[
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args::file(),
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Arg::new("DECODE")
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.help("Decode rather than encode")
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.short('d')
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.long("decode")
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.action(ArgAction::SetTrue),
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Arg::new("IGNORE")
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.help("Ignore whitespace when decoding")
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.short('i')
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.long("ignore-space")
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.action(ArgAction::SetTrue),
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Arg::new("WRAP")
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.help("Wrap encoded lines after n characters")
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.short('w')
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.long("wrap")
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.value_parser(value_parser!(usize))
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.default_value("76"),
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args::color(),
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args::verbose(),
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Arg::new("QUIET")
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.help("Do not display header, even with multiple files")
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.short('q')
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.long("quiet")
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.action(ArgAction::SetTrue),
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]
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}
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fn decode_base32(mut contents: String, ignore: bool) -> Result<(), Box<dyn Error>> {
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if ignore {
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contents.retain(|c| !c.is_whitespace());
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} else {
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contents = contents.replace('\n', "");
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}
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let decoded = BASE32.decode(contents.as_bytes())?;
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let output = String::from_utf8(decoded)?;
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println!("{}\n", output.trim_end());
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Ok(())
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}
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fn encode_base32(contents: &str, wrap: usize) {
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BASE32
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.encode(contents.as_bytes())
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.chars()
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.collect::<Vec<char>>()
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.chunks(wrap)
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.map(|c| c.iter().collect::<String>())
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.for_each(|line| println!("{line}"));
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}
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fn get_contents(file: &str) -> Result<String, Box<dyn Error>> {
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let mut contents = String::new();
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if file == "-" {
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io::stdin().read_to_string(&mut contents)?;
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} else {
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contents = fs::read_to_string(file)?;
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}
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Ok(contents)
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}
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