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mod abort;
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mod handler;
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mod highlighter;
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mod init;
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mod prompt;
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pub use self::abort::*;
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pub use self::handler::*;
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pub use self::init::Repl;
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use crate::client::ChatGptClient;
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use crate::config::SharedConfig;
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use crate::print_now;
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use crate::term;
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use anyhow::{Context, Result};
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use reedline::Signal;
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use std::borrow::Cow;
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use std::sync::Arc;
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pub const REPL_COMMANDS: [(&str, &str); 11] = [
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(".info", "Print the information"),
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(".set", "Modify the configuration temporarily"),
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(".prompt", "Add a GPT prompt"),
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(".role", "Select a role"),
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(".clear role", "Clear the currently selected role"),
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(".conversation", "Start a conversation."),
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(".clear conversation", "End current conversation."),
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(".history", "Print the history"),
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(".clear history", "Clear the history"),
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(".help", "Print this help message"),
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(".exit", "Exit the REPL"),
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];
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impl Repl {
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pub fn run(&mut self, client: ChatGptClient, config: SharedConfig) -> Result<()> {
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let abort = AbortSignal::new();
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let handler = ReplCmdHandler::init(client, config, abort.clone())?;
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print_now!("Welcome to aichat {}\n", env!("CARGO_PKG_VERSION"));
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print_now!("Type \".help\" for more information.\n");
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let mut already_ctrlc = false;
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let handler = Arc::new(handler);
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loop {
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if abort.aborted_ctrld() {
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break;
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}
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if abort.aborted_ctrlc() && !already_ctrlc {
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already_ctrlc = true;
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}
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let sig = self.editor.read_line(&self.prompt);
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match sig {
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Ok(Signal::Success(line)) => {
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already_ctrlc = false;
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abort.reset();
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match self.handle_line(handler.clone(), line) {
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Ok(quit) => {
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if quit {
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break;
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}
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}
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Err(err) => {
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let err = format!("{err:?}");
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print_now!("{}\n\n", err.trim());
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}
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}
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}
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Ok(Signal::CtrlC) => {
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abort.set_ctrlc();
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if !already_ctrlc {
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already_ctrlc = true;
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print_now!("(To exit, press Ctrl+C again or Ctrl+D or type .exit)\n\n");
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} else {
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break;
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}
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}
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Ok(Signal::CtrlD) => {
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abort.set_ctrld();
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break;
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}
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_ => {}
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}
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}
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Ok(())
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}
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fn handle_line(&mut self, handler: Arc<ReplCmdHandler>, line: String) -> Result<bool> {
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let line = clean_multiline_symbols(&line);
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match parse_command(&line) {
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Some((cmd, args)) => match cmd {
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".exit" => {
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return Ok(true);
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}
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".help" => {
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dump_repl_help();
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}
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".clear" => match args {
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Some("screen") => term::clear_screen(0)?,
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Some("history") => {
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let history = Box::new(self.editor.history_mut());
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history.clear().with_context(|| "Failed to clear history")?;
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print_now!("\n");
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}
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Some("role") => handler.handle(ReplCmd::ClearRole)?,
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Some("conversation") => handler.handle(ReplCmd::EndConversatoin)?,
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_ => dump_unknown_command(),
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},
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".history" => {
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self.editor.print_history()?;
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print_now!("\n");
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}
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".role" => match args {
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Some(name) => handler.handle(ReplCmd::SetRole(name.to_string()))?,
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None => print_now!("Usage: .role <name>\n\n"),
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},
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".info" => {
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handler.handle(ReplCmd::ViewInfo)?;
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}
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".set" => {
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handler.handle(ReplCmd::UpdateConfig(args.unwrap_or_default().to_string()))?;
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self.prompt.sync_config();
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}
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".prompt" => {
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let text = args.unwrap_or_default().to_string();
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if text.is_empty() {
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print_now!("Usage: .prompt <text>.\n\n");
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} else {
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handler.handle(ReplCmd::Prompt(text))?;
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}
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}
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".conversation" => {
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handler.handle(ReplCmd::StartConversation)?;
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}
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_ => dump_unknown_command(),
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},
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None => {
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handler.handle(ReplCmd::Submit(line.to_string()))?;
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}
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}
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Ok(false)
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}
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}
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fn dump_unknown_command() {
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print_now!("Error: Unknown command. Type \".help\" for more information.\n\n");
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}
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fn dump_repl_help() {
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let head = REPL_COMMANDS
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.iter()
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.map(|(name, desc)| format!("{name:<24} {desc}"))
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.collect::<Vec<String>>()
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.join("\n");
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print_now!(
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r###"{head}
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Type `{{` to enter the multi-line editing mode, type '}}' to exit the mode.
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Press Ctrl+C to abort readline, Ctrl+D to exit the REPL
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"###,
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);
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}
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fn clean_multiline_symbols(line: &str) -> Cow<str> {
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let trimed_line = line.trim();
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match trimed_line.chars().next() {
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Some('{') | Some('[') | Some('(') => trimed_line[1..trimed_line.len() - 1].into(),
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_ => Cow::Borrowed(line),
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}
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}
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fn parse_command(line: &str) -> Option<(&str, Option<&str>)> {
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let mut trimed_line = line.trim_start();
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if trimed_line.starts_with('.') {
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trimed_line = trimed_line.trim_end();
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match trimed_line
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.split_once(' ')
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.or_else(|| trimed_line.split_once('\n'))
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{
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Some((head, tail)) => {
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let trimed_tail = tail.trim();
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if trimed_tail.is_empty() {
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Some((head, None))
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} else {
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Some((head, Some(trimed_tail)))
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}
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}
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None => Some((trimed_line, None)),
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}
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} else {
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None
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}
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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_process_command_line() {
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assert_eq!(parse_command(" .role"), Some((".role", None)));
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assert_eq!(parse_command(" .role "), Some((".role", None)));
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assert_eq!(
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parse_command(" .set dry_run true"),
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Some((".set", Some("dry_run true")))
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);
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assert_eq!(
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parse_command(" .set dry_run true "),
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Some((".set", Some("dry_run true")))
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);
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assert_eq!(
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parse_command(".prompt \nabc\n"),
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Some((".prompt", Some("abc")))
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);
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}
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}
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