src/cli/cmd/read.rs


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//! Read the contents of a file and add it to the currently edited map.

use super::Command;
use super::{CmdParseError, FromArgs};
use crate::map::MapData;
use crate::Editor;
use std::path::PathBuf;

pub struct Read {
    file: PathBuf,
}

impl FromArgs for Read {
    fn from_args(args: &[&str]) -> Result<Self, CmdParseError> {
        if args.len() != 1 {
            return Err(CmdParseError::WrongNumberOfArgs(args.len(), 1..=1));
        }

        Ok(Self {
            file: PathBuf::from(args[0]),
        })
    }
}

impl Command for Read {
    fn process(&self, editor: &mut Editor) -> Result<String, String> {
        let data = match MapData::load_from_file(&self.file) {
            Ok(data) => data,
            Err(err) => return Err(format!("Unable to read file: {:?}", &self.file)),
        };

        editor.map_mut().add_data(data);
        Ok(format!(
            "Map data from {:?} read and added to the current buffer.",
            &self.file
        ))
    }
}