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//! Pure text/history helpers for the client TUI.
//!
//! Nothing here touches the terminal, so it is unit-tested from `tests/`
//! without a PTY.
struct CommandHelp {
name: &'static str,
usage: &'static str,
description: &'static str,
}
const COMMANDS: &[CommandHelp] = &[
CommandHelp {
name: "connect",
usage: "connect <ip>:<port>",
description: "connect to the server",
},
CommandHelp {
name: "send",
usage: "send <message>",
description: "send a message to the server",
},
CommandHelp {
name: "disconnect",
usage: "disconnect",
description: "disconnect from the server",
},
CommandHelp {
name: "ping",
usage: "ping",
description: "ping the server",
},
CommandHelp {
name: "login",
usage: "login",
description: "login to the server",
},
CommandHelp {
name: "register",
usage: "register",
description: "register a new user",
},
CommandHelp {
name: "setcred",
usage: "setcred",
description: "set credentials for a host",
},
CommandHelp {
name: "logout",
usage: "logout",
description: "logout from the server",
},
CommandHelp {
name: "info",
usage: "info",
description: "show account and connection info",
},
CommandHelp {
name: "play",
usage: "play <game> [bet]",
description: "start a game (e.g. play slots 50)",
},
CommandHelp {
name: "games",
usage: "games",
description: "list available games",
},
CommandHelp {
name: "help",
usage: "help",
description: "show this message",
},
CommandHelp {
name: "forget-host",
usage: "forget-host [ip:port]",
description: "clear saved trust fingerprint and credentials",
},
CommandHelp {
name: "hosts",
usage: "hosts",
description: "list remembered hosts",
},
CommandHelp {
name: "quit",
usage: "quit",
description: "quit the program",
},
];
pub fn command_names() -> Vec<&'static str> {
COMMANDS.iter().map(|command| command.name).collect()
}
pub fn help_lines() -> Vec<String> {
let mut lines = vec!["Available commands:".to_string()];
for command in COMMANDS {
lines.push(format!(
" {:<28} - {}",
command.usage, command.description
));
}
lines
}
/// Wrap a completion list to `width` columns, one space between names.
pub fn completion_lines(commands: &[&str], width: usize) -> Vec<String> {
let mut lines = vec!["Possible completions:".to_string()];
let mut current = String::new();
for command in commands {
let needed = if current.is_empty() {
command.len()
} else {
current.len() + 1 + command.len()
};
if !current.is_empty() && needed > width {
lines.push(current.clone());
current.clear();
}
if !current.is_empty() {
current.push(' ');
}
current.push_str(command);
}
if !current.is_empty() {
lines.push(current);
}
lines
}
/// Add a command to the history, skipping blanks and consecutive duplicates.
pub fn record_history(history: &mut Vec<String>, line: &str) {
let line = line.trim();
if line.is_empty() {
return;
}
if history.last().is_some_and(|last| last == line) {
return;
}
history.push(line.to_string());
}
/// Parse the optional bet argument of `play <game> [bet]`.
pub fn parse_bet_arg(raw: &str) -> Result<u64, String> {
let bet = raw
.trim()
.parse::<u64>()
.map_err(|_| format!("Invalid bet: {raw}"))?;
if bet < 10 {
return Err("Bet must be at least 10 PLN".to_string());
}
Ok(bet)
}
/// Lines to move the cursor up to reach the first line of a region that ends
/// on the current line. `render()` has no trailing newline, so a 7-line board
/// needs `MoveUp(6)`.
pub fn lines_to_move_up(previous_lines: usize) -> u16 {
previous_lines
.saturating_sub(1)
.min(u16::MAX as usize) as u16
}
/// Column (0-based) to move to after the given prompt and input text.
pub fn input_cursor_column(prompt_len: usize, input_len: usize) -> u16 {
prompt_len
.saturating_add(input_len)
.min(u16::MAX as usize) as u16
}
|
