88 lines
2.9 KiB
Rust
88 lines
2.9 KiB
Rust
// Dancing Droids
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// Copyright (C) 2020 Martin HART, Volodymyr PATUTA, Stephane Elias BENABDESLAM
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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use clap::{App, Arg};
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use std::fs;
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use std::io;
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mod robot;
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mod world;
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/// Parse the config file, generate the world and robot pool.
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fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::World, &'static str> {
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let mut lines = conf.lines();
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// The first line of the config file should be the World.
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let raw_line: &str = match lines.next() {
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Some(raw) => raw,
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None => return Err("Could not read the first line of the config file !"),
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};
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let mut tokens = raw_line.split_whitespace();
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let token1 = match tokens.next() {
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Some(raw) => raw,
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None => return Err("Could not read the first token of the first line !"),
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};
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let token2 = match tokens.next() {
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Some(raw) => raw,
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None => return Err("Could not read the second token of the first line !"),
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};
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let x: i32 = match token1.parse::<i32>() {
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Ok(x) => x,
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Err(err) => return Err("Could not convert token one from the first string to i32"),
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};
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let y: i32 = match token2.parse::<i32>() {
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Ok(x) => x,
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Err(err) => return Err("Could not convert token two from the first string to i32"),
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};
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Ok(world::World { x, y })
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}
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/// Retrieve the content of a file and return it as a string.
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fn open_file(filename: &str) -> io::Result<String> {
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let content = fs::read_to_string(filename)?;
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Ok(content)
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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// We handle CLI flags here.
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let matches = App::new("DancingDroids")
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.version("0.1.0")
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.about("When droids dance togethers")
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.arg(
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Arg::with_name("file")
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.short("f")
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.long("file")
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.takes_value(true)
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.help("Configuration file"),
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)
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.get_matches();
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let raw_conf = open_file(matches.value_of("file").unwrap_or("two_robots.txt"))?;
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let mut robot_pool: Vec<robot::Robot> = Vec::new();
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let world: world::World = parse_config(raw_conf, &mut robot_pool)?;
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_open_file() {
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assert!(open_file("two_robots.txt").is_ok());
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assert!(open_file("test_unexisting_file.extension").is_err());
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}
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}
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