kex 0.2.6

Console application for streamed hex dumping
Documentation 
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use getopts::*;
use kex::*;
use std::env;
use std::{
    io::{stdout, Stdout, Write},
};

mod result;
pub(crate) use result::*;

mod opts;
use opts::*;

pub(crate) use opts::ContentRange;

pub(crate) fn get_app_config() -> AppResult<AppConfig> {
    let args = env::args().skip(1);

    let opts = get_configured_opts();

    let matches = match opts.parse(args) {
        Ok(m) => m,
        Err(e) => {
            return Err(AppError::new(format!("{e}")));
        }
    };

    AppConfig::new(matches)
}

pub(crate) struct AppConfig {
    pub(crate) input: Input,
    pub(crate) output: Output,
}

impl AppConfig {
    fn new(matches: Matches) -> AppResult<Self> {
        let input = Input::new(&matches)?;
        let output = Output::new(&matches, input.range.skip)?;

        Ok(Self { input, output })
    }
}

pub(crate) struct Input {
    pub(crate) range: ContentRange,
    pub(crate) content: Content,
}

impl Input {
    fn new(matches: &Matches) -> AppResult<Self> {
        let range = ContentRange::new(matches)?;
        let content = Content::new(matches)?;

        Ok(Self {
            range,
            content,
        })
    }
}

pub(crate) enum Content {
    Files(Vec<String>),
    Stdin,
}

impl Content {
    fn new(matches: &Matches) -> AppResult<Self> {
        let free_args = matches.free.clone();

        if free_args.len() != 0 {
            Ok(Content::Files(free_args))
        } else {
            Ok(Content::Stdin)
        }
    }
}

pub(crate) struct Output {
    printer: Printer<Stdout, AddressFormatter, ByteFormatter, CharFormatter>,
}

impl Output {
    fn new(matches: &Matches, offset: usize) -> AppResult<Self> {
        let byte_style = ByteStyle::new(matches)?;
        let char_formatter = match byte_style {
            ByteStyle::Ascii | ByteStyle::CaretAscii => None,
            _ => Some(CharFormatter::new(".", Separators::new(" |", "|")))
        };

        let config = Config::new(
            Some(AddressFormatter::new(
                AddressStyle::new(matches)?,
                Separators::new("", " "),
            )),
            ByteFormatter::new(
                byte_style,
                Groupping::new(matches)?,
                " ",
                false,
                Separators::new(" ", " "),
            ),
            char_formatter,
            true,
        );

        Ok(Self {
            printer: Printer::new(stdout(), offset, config),
        })
    }
}

impl Write for Output {
    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
        self.printer.write(buf)
    }

    fn flush(&mut self) -> std::io::Result<()> {
        self.printer.flush()
    }
}

impl From<std::io::Error> for AppError {
    fn from(value: std::io::Error) -> Self {
        AppError::new(format!("{value}"))
    }
}