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// Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use clap::{Arg, ArgAction, Command};
use std::ffi::OsString;
use std::net::SocketAddr;
use std::path::PathBuf;
#[derive(Debug)]
pub(super) struct Arguments {
pub(super) root: PathBuf,
pub(super) listener: Listener,
pub(super) healthcheck: bool,
pub(super) init: bool,
pub(super) reset_owner: Option<String>,
pub(super) owner_fingerprint: bool,
pub(super) snapshot: Option<PathBuf>,
}
#[derive(Debug)]
pub(super) struct Listener {
pub(super) bind: Option<SocketAddr>,
pub(super) proxy: bool,
}
fn flag(name: &'static str) -> Arg {
Arg::new(name).long(name).action(ArgAction::SetTrue)
}
fn path(name: &'static str) -> Arg {
Arg::new(name)
.long(name)
.value_parser(clap::builder::PathBufValueParser::new())
}
fn command() -> Command {
Command::new("stack-chat-server").about("Run private chat directly or behind the stack gateway")
.args([
path("root").default_value("."),
Arg::new("bind").long("bind").value_parser(str::parse::<SocketAddr>),
flag("proxy").help("Run behind the stack gateway using its explicit container environment"),
flag("healthcheck").help("Check the local HTTP health endpoint without opening the database"),
flag("init").conflicts_with_all(["reset-owner", "owner-fingerprint", "snapshot"]),
Arg::new("reset-owner").long("reset-owner").value_name("FINGERPRINT").conflicts_with_all(["owner-fingerprint", "snapshot"])
.help("Permanently clear the matching owner registration and all chat history after key loss"),
flag("owner-fingerprint").conflicts_with("snapshot").help("Print the registered owner's public fingerprint"),
path("snapshot"),
])
}
impl Arguments {
pub(super) fn try_parse() -> Result<Self, clap::Error> {
Self::try_parse_from(std::env::args_os())
}
fn try_parse_from(
arguments: impl IntoIterator<Item = impl Into<OsString> + Clone>,
) -> Result<Self, clap::Error> {
let mut values = command().try_get_matches_from(arguments)?;
let root = values.remove_one("root").ok_or_else(|| {
clap::Error::raw(
clap::error::ErrorKind::MissingRequiredArgument,
"Missing application root",
)
})?;
Ok(Self {
root,
listener: Listener {
bind: values.remove_one("bind"),
proxy: values.get_flag("proxy"),
},
healthcheck: values.get_flag("healthcheck"),
init: values.get_flag("init"),
reset_owner: values.remove_one("reset-owner"),
owner_fingerprint: values.get_flag("owner-fingerprint"),
snapshot: values.remove_one("snapshot"),
})
}
}
#[cfg(test)]
mod tests {
use super::{Arguments, command};
use anyhow::{Result, ensure};
use std::path::Path;
#[test]
fn checked_command_schema() {
command().debug_assert();
}
#[test]
fn listener_defaults_and_maintenance_conflicts() -> Result<()> {
let defaults = Arguments::try_parse_from(["stack-chat-server"])?;
anyhow::ensure!((defaults.root) == (Path::new(".")), "Test invariant failed");
anyhow::ensure!(
!defaults.listener.proxy && defaults.listener.bind.is_none(),
"Test invariant failed"
);
let parsed = Arguments::try_parse_from([
"stack-chat-server",
"--root",
"/tmp/stack",
"--bind",
"127.0.0.1:9180",
"--proxy",
"--healthcheck",
])?;
anyhow::ensure!(
(parsed.root) == (Path::new("/tmp/stack")),
"Test invariant failed"
);
ensure!(
parsed
.listener
.bind
.is_some_and(|address| address.port() == 9180),
"Listener port differs"
);
anyhow::ensure!(
parsed.listener.proxy && parsed.healthcheck,
"Test invariant failed"
);
for args in [
vec!["stack-chat-server", "--bind", "garbage"],
vec!["stack-chat-server", "--init", "--snapshot", "snapshot"],
vec![
"stack-chat-server",
"--reset-owner",
"abc",
"--owner-fingerprint",
],
vec![
"stack-chat-server",
"--owner-fingerprint",
"--snapshot",
"snapshot",
],
] {
anyhow::ensure!(
Arguments::try_parse_from(args).is_err(),
"Test invariant failed"
);
}
Ok(())
}
}
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