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use clap::{self, App, SubCommand, Arg, AppSettings};
use std::time::Duration;
use std::path::PathBuf;
use std::env::home_dir;
use std::str::FromStr;
use regex::Regex;
use std::fs;
lazy_static! {
static ref SLEEP_RGX: Regex = Regex::new(r"(\d+)s").unwrap();
}
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub enum Subsystem {
Init {
force: bool,
},
AddFeeds,
UnfollowFeeds,
StartDaemon {
sleep: Duration,
},
}
#[derive(Debug, Clone, Hash, PartialEq, Eq)]
pub struct Options {
pub config_dir: (String, PathBuf),
pub subsystem: Subsystem,
}
impl Options {
pub fn parse() -> Options {
let matches = App::new("dishub")
.version(crate_version!())
.author(crate_authors!())
.setting(AppSettings::ColoredHelp)
.setting(AppSettings::VersionlessSubcommands)
.setting(AppSettings::SubcommandRequiredElseHelp)
.about("Rust app for posting GitHub activity on Discord")
.arg(Arg::from_usage("-c --config-dir=[CONFIG_DIR] 'Directory containing configuration. Default: $HOME/.dishub'")
.validator(Options::config_dir_validator))
.subcommand(SubCommand::with_name("init")
.about("Initialise global app data")
.arg(Arg::from_usage("-f --force 'Override current app configuration'")))
.subcommand(SubCommand::with_name("add-feeds").about("Add feeds to post to servers"))
.subcommand(SubCommand::with_name("unfollow-feeds").about("Unsubscribe from selected followed feeds"))
.subcommand(SubCommand::with_name("start-daemon")
.about("Run the activity-posting daemon")
.arg(Arg::from_usage("-s --sleep=[SLEEP_TIME] 'Time to sleep between each iteration'")
.default_value("60s")
.validator(Options::sleep_validator)))
.get_matches();
Options {
config_dir: match matches.value_of("config-dir") {
Some(dirs) => (dirs.to_string(), fs::canonicalize(dirs).unwrap()),
None => {
match home_dir() {
Some(mut hd) => {
hd = hd.canonicalize().unwrap();
hd.push(".dishub");
fs::create_dir_all(&hd).unwrap();
("$HOME/.dishub".to_string(), hd)
}
None => {
clap::Error {
message: "Couldn't automatically get home directory, please specify configuration directory with the -c option".to_string(),
kind: clap::ErrorKind::MissingRequiredArgument,
info: None,
}
.exit()
}
}
}
},
subsystem: match matches.subcommand() {
("init", Some(init_matches)) => Subsystem::Init { force: init_matches.is_present("force") },
("add-feeds", _) => Subsystem::AddFeeds,
("unfollow-feeds", _) => Subsystem::UnfollowFeeds,
("start-daemon", Some(start_daemon_matches)) => {
Subsystem::StartDaemon { sleep: Duration::from_secs(Options::parse_sleep(start_daemon_matches.value_of("sleep").unwrap()).unwrap()) }
}
_ => panic!("No subcommand passed"),
},
}
}
fn parse_sleep(s: &str) -> Option<u64> {
SLEEP_RGX.captures(s).map(|c| u64::from_str(c.at(1).unwrap()).unwrap())
}
fn config_dir_validator(s: String) -> Result<(), String> {
fs::canonicalize(&s).map(|_| ()).map_err(|_| format!("Configuration directory \"{}\" not found", s))
}
fn sleep_validator(s: String) -> Result<(), String> {
match Options::parse_sleep(&s) {
None => Err(format!("\"{}\" is not a valid sleep duration (in format \"NNNs\")", s)),
Some(_) => Ok(()),
}
}
}