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// Copyright (C) 2021-2021 The Whirlsplash Collective
// SPDX-License-Identifier: GPL-3.0-only
use {
std::{io::Write, str::FromStr},
structopt::clap::{App, AppSettings, Arg, SubCommand},
whirl_config::Config,
};
enum RunType {
Distributor,
Hub,
Api,
}
impl FromStr for RunType {
type Err = &'static str;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"distributor" => Ok(Self::Distributor),
"hub" => Ok(Self::Hub),
"api" => Ok(Self::Api),
_ => Err("no match"),
}
}
}
// https://stackoverflow.com/questions/57888454/how-to-remove-duplicates-from-a-vector-of-structures
trait Dedup<T: PartialEq + Clone> {
fn clear_duplicates(&mut self);
}
impl<T: PartialEq + Clone> Dedup<T> for Vec<T> {
fn clear_duplicates(&mut self) {
let mut already_seen = vec![];
self.retain(|item| {
if already_seen.contains(item) {
false
} else {
already_seen.push(item.clone());
true
}
});
}
}
pub struct Cli;
impl Cli {
/// # Panics
/// Though Rust thinks a panic might happen because of the `unreachable`
/// macro, all CLI subcommands are handled so it is trully unreachable.
pub async fn execute() {
let matches = Self::cli().get_matches();
if Config::get().whirlsplash.log.test {
error!("error");
warn!("warn");
info!("info");
debug!("debug");
trace!("trace");
}
debug!("attempting to create .whirl directory...");
match std::fs::create_dir(".whirl/") {
Ok(()) => debug!("successfully created .whirl directory"),
Err(e) => debug!("error creating .whirl directory: {}", e),
}
match matches.subcommand() {
("run", Some(s_matches)) =>
Self::run({
// Make a vector of the passed types for the `run` sub-command, if the
// vector cannot be unwrapped, the must mean that the user did not
// pass any sub-server types meaning that the subcommand `run` was
// called without any arguments, in other words: "run everything".
let mut types = {
s_matches.values_of("type").map_or_else(
|| vec!["distributor", "hub", "api"],
std::iter::Iterator::collect,
)
};
// Remove any duplicate sub-commands, we don't want to start two
// instances of the same sub-server.
types.clear_duplicates();
let mut run_types = vec![];
// Iterate over all of the types and push them to a vector that we'll
// pass to the `run` method.
while let Some(run_type) = types.last() {
match run_type.to_owned() {
"distributor" => run_types.push(RunType::Distributor),
"hub" => run_types.push(RunType::Hub),
"api" => run_types.push(RunType::Api),
_ => {}
}
types.pop();
}
run_types
})
.await,
("config", Some(s_matches)) => match s_matches.subcommand() {
("show", _) => println!("{:#?}", Config::get()),
("generate", Some(s_s_matches)) => {
if std::path::Path::new(".whirl/Config.toml").exists()
&& !s_s_matches.is_present("force")
{
info!(
"a configuration file is already present, if you would like to \
regenerate the configuration file, execute this sub-command \
with the `--force` (`-f`) flag"
);
} else {
let mut file = std::fs::File::create(".whirl/Config.toml")
.expect("unable to create configuration file");
file
.write_all(include_bytes!(
"../../whirl_config/Config.default.toml"
))
.expect(
"unable to write default configuration to generated \
configuration file",
);
info!("successfully generated a new configuration file");
}
}
_ => unreachable!(),
},
("clean", _) => {
let cleanable_directories = vec![".whirl/log/"];
for dir in cleanable_directories {
let file_type = if dir.ends_with('/') { "directory" } else { "file" };
info!("cleaning {}: {}", file_type, dir);
if let Err(e) = std::fs::remove_dir_all(dir) {
warn!("cannot delete {}: {}: {}", file_type, dir, e);
}
}
}
_ => unreachable!(),
}
}
fn cli() -> App<'static, 'static> {
App::new(env!("CARGO_PKG_NAME"))
.about(env!("CARGO_PKG_DESCRIPTION"))
.version(env!("CARGO_PKG_VERSION"))
.author(env!("CARGO_PKG_AUTHORS"))
.settings(&[AppSettings::SubcommandRequiredElseHelp])
.subcommands(vec![
SubCommand::with_name("run")
.about("Start the WorldServer or a selection of sub-servers.")
.long_about(
"Start the WorldServer by executing this sub-command WITHOUT any \
arguments, start a selection of sub-servers by passing a \
comma-separated list of sub-server types.",
)
.arg(
Arg::with_name("type")
.required(false)
.takes_value(true)
.index(1)
.use_delimiter(true)
.possible_values(&["distributor", "hub", "api"]),
),
SubCommand::with_name("config")
.setting(AppSettings::SubcommandRequiredElseHelp)
.subcommands(vec![
SubCommand::with_name("show"),
SubCommand::with_name("generate")
.alias("gen")
.arg(Arg::with_name("force").short("f").long("force")),
]),
SubCommand::with_name("clean").about(
"Delete Whirl-generated files/ directories which are NOT critical. \
E.g., .whirl/logs/",
),
])
.args(&[
Arg::with_name("debug").short("d").long("debug"),
Arg::with_name("trace").short("t").long("trace"),
])
}
async fn run(mut server_type: Vec<RunType>) {
#[allow(clippy::collection_is_never_read)]
let mut threads = vec![];
// Iterate over all of of the requested sub-servers and spawn one of each.
while let Some(run_type) = server_type.last() {
match run_type {
RunType::Distributor => threads.push(whirl_server::make::distributor()),
RunType::Hub => threads.push(whirl_server::make::hub()),
RunType::Api => threads.push(whirl_api::make()),
}
server_type.pop();
}
if std::env::var("DISABLE_PROMPT").unwrap_or_else(|_| "false".to_string())
== "true"
|| !Config::get().whirlsplash.prompt.enable
{
info!("starting with prompt disabled");
loop {
std::thread::sleep(std::time::Duration::default());
}
}
whirl_prompt::Prompt::handle().await;
}
}
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