use std::fmt; use cursive::event::{Event, EventResult, Key}; use cursive::theme::{BaseColor, Color, ColorStyle}; use cursive::view::Resizable; use cursive::views::{EditView, LinearLayout, OnEventView, TextView}; use cursive::Cursive; use crate::{app::App, CONFIGURATION}; static COMMANDS: &'static [&'static str] = &[ "add", "add-auto", "delete", "track-up", "track-down", "month-prev", "month-next", "quit", "write", "help", ]; fn get_command_completion(prefix: &str) -> Option { let first_match = COMMANDS.iter().filter(|&x| x.starts_with(prefix)).next(); return first_match.map(|&x| x.into()); } fn get_habit_completion(prefix: &str, habit_names: &[String]) -> Option { let first_match = habit_names.iter().filter(|&x| x.starts_with(prefix)).next(); eprintln!("{:?}| {:?}", prefix, first_match); return first_match.map(|x| x.into()); } pub fn open_command_window(s: &mut Cursive) { let habit_list: Vec = s .call_on_name("Main", |view: &mut App| { return view.list_habits(); }) .unwrap(); let style = ColorStyle::new(Color::Dark(BaseColor::Black), Color::Dark(BaseColor::White)); let command_window = OnEventView::new( EditView::new() .filler(" ") .on_submit(call_on_app) .style(style), ) .on_event_inner( Event::Key(Key::Tab), move |view: &mut EditView, _: &Event| { let contents = view.get_content(); if !contents.contains(" ") { let completion = get_command_completion(&*contents); if let Some(c) = completion { let cb = view.set_content(c); return Some(EventResult::Consumed(Some(cb))); }; return None; } else { let word = contents.split(' ').last().unwrap(); let completion = get_habit_completion(word, &habit_list); eprintln!("{:?} | {:?}", completion, contents); if let Some(c) = completion { let cb = view.set_content(format!("{}", contents) + &c[word.len()..]); return Some(EventResult::Consumed(Some(cb))); }; return None; } }, ) .fixed_width(CONFIGURATION.view_width * CONFIGURATION.grid_width); s.call_on_name("Frame", |view: &mut LinearLayout| { let mut commandline = LinearLayout::horizontal() .child(TextView::new(":")) .child(command_window); commandline.set_focus_index(1); view.add_child(commandline); view.set_focus_index(1); }); } fn call_on_app(s: &mut Cursive, input: &str) { // things to do after recieving the command // 1. parse the command // 2. clean existing command messages // 3. remove the command window // 4. handle quit command s.call_on_name("Main", |view: &mut App| { let cmd = Command::from_string(input); view.clear_message(); view.parse_command(cmd); }); s.call_on_name("Frame", |view: &mut LinearLayout| { view.set_focus_index(0); view.remove_child(view.get_focus_index()); }); // special command that requires access to // our main cursive object, has to be parsed again // here // TODO: fix this somehow if let Ok(Command::Quit) = Command::from_string(input) { s.quit(); } } #[derive(PartialEq, Debug)] pub enum Command { Add(String, Option, bool), MonthPrev, MonthNext, Delete(String), TrackUp(String), TrackDown(String), Help(Option), Write, Quit, Blank, } #[derive(PartialEq, Debug)] enum CommandName { Add, AddAuto, MonthPrev, MonthNext, Delete, TrackUp, TrackDown, Help, Write, Quit, Blank, } #[derive(PartialEq, Debug)] pub enum CommandLineError { InvalidCommand(String), // command name InvalidArg(u32), // position NotEnoughArgs(String, u32), // command name, required no. of args } impl std::error::Error for CommandLineError {} impl fmt::Display for CommandLineError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { match self { CommandLineError::InvalidCommand(s) => write!(f, "Invalid command: `{}`", s), CommandLineError::InvalidArg(p) => write!(f, "Invalid argument at position {}", p), CommandLineError::NotEnoughArgs(s, n) => { write!(f, "Command `{}` requires atleast {} argument(s)!", s, n) } } } } type Result = std::result::Result; impl Command { pub fn from_string>(input: P) -> Result { let input_str = input.as_ref().trim(); let parsed = parse_command_name(input_str); if let Ok((command_name, rest)) = parsed { match command_name { CommandName::Add => return parse_add(rest), CommandName::AddAuto => return parse_add_auto(rest), CommandName::Delete => return parse_delete(rest), CommandName::TrackUp => return parse_track_up(rest), CommandName::TrackDown => return parse_track_down(rest), CommandName::Help => return parse_help(rest), CommandName::MonthPrev => return Ok(Command::MonthPrev), CommandName::MonthNext => return Ok(Command::MonthNext), CommandName::Quit => return Ok(Command::Quit), CommandName::Write => return Ok(Command::Write), CommandName::Blank => return Ok(Command::Blank), } } else { return Err(parsed.err().unwrap()); } } } fn parse_command_name(input: &str) -> Result<(CommandName, &str)> { let chars = input.trim().chars(); let mut parsed_name = "".to_owned(); let mut pos = 0; for c in chars { pos = pos + 1; if c == ' ' { break; } parsed_name.push(c); } match parsed_name.as_ref() { "add" | "a" => Ok((CommandName::Add, &input[pos..])), "add-auto" | "aa" => Ok((CommandName::AddAuto, &input[pos..])), "delete" | "d" => Ok((CommandName::Delete, &input[pos..])), "track-up" | "tup" => Ok((CommandName::TrackUp, &input[pos..])), "track-down" | "tdown" => Ok((CommandName::TrackDown, &input[pos..])), "h" | "?" | "help" => Ok((CommandName::Help, &input[pos..])), "mprev" => Ok((CommandName::MonthPrev, &input[pos..])), "mnext" => Ok((CommandName::MonthNext, &input[pos..])), "quit" | "q" => Ok((CommandName::Quit, &input[pos..])), "write" | "w" => Ok((CommandName::Write, &input[pos..])), "" => Ok((CommandName::Blank, &input[pos..])), _ => Err(CommandLineError::InvalidCommand(parsed_name)), } } fn parse_name(input: &str) -> (String, &str) { let chars = input.trim().chars(); let mut name = "".to_owned(); let mut pos = 0; let mut parenthesis = false; for c in chars { pos = pos + 1; if c == '"' || c == '\"' { if parenthesis { return (name, &input[pos..]); } else { parenthesis = true; continue; } } if parenthesis { name.push(c); continue; } if c == ' ' { break; } name.push(c); } (name, &input[pos..]) } fn parse_goal(input: &str) -> Option<(Option, &str)> { let chars = input.trim().chars(); let mut goal_string = "".to_owned(); let mut pos = 0; if input.is_empty() { return Some((None, input)); } for c in chars { pos = pos + 1; if c == ' ' { break; } goal_string.push(c); } let parsed = goal_string.parse::(); if parsed.is_err() { return None; } if pos + 1 > input.len() { return Some((parsed.ok(), "")); } Some((parsed.ok(), &input[pos..])) } fn parse_add(input: &str) -> Result { let (name, rest) = parse_name(input); if name.is_empty() { return Err(CommandLineError::NotEnoughArgs("add".to_owned(), 2)); } let parsed_goal = parse_goal(rest); if parsed_goal.is_none() { return Err(CommandLineError::InvalidArg(2)); } Ok(Command::Add(name, parsed_goal.unwrap().0, false)) } fn parse_add_auto(input: &str) -> Result { let (name, rest) = parse_name(input); if name.is_empty() { return Err(CommandLineError::NotEnoughArgs("add-auto".to_owned(), 2)); } let parsed_goal = parse_goal(rest); if parsed_goal.is_none() { return Err(CommandLineError::InvalidArg(2)); } Ok(Command::Add(name, parsed_goal.unwrap().0, true)) } fn parse_delete(input: &str) -> Result { let (name, _) = parse_name(input); if name.is_empty() { return Err(CommandLineError::NotEnoughArgs("delete".to_owned(), 1)); } Ok(Command::Delete(name)) } fn parse_track_up(input: &str) -> Result { let (name, _) = parse_name(input); if name.is_empty() { return Err(CommandLineError::NotEnoughArgs("track-up".to_owned(), 1)); } Ok(Command::TrackUp(name)) } fn parse_track_down(input: &str) -> Result { let (name, _) = parse_name(input); if name.is_empty() { return Err(CommandLineError::NotEnoughArgs("track-down".to_owned(), 1)); } Ok(Command::TrackDown(name)) } fn parse_help(input: &str) -> Result { let (name, _) = parse_name(input); if name.is_empty() { return Ok(Command::Help(None)); } Ok(Command::Help(Some(name))) } #[cfg(test)] mod tests { use super::*; #[test] fn parse_add_command() { let inputs = ["add eat 2", "a eat 2"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Add(name, goal, auto) => { assert_eq!(name, "eat"); assert_eq!(goal.unwrap(), 2); assert_eq!(auto, false); } _ => panic!(), } } } #[test] fn parse_add_command_without_goal() { let inputs = ["add eat", "a eat"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Add(name, goal, auto) => { assert_eq!(name, "eat"); assert!(goal.is_none()); assert_eq!(auto, false); } _ => panic!(), } } } #[test] fn parse_add_command_with_long_name() { let inputs = ["add \"eat healthy\" 5", "a \"eat healthy\" 5"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Add(name, goal, auto) => { assert_eq!(name, "eat healthy"); assert_eq!(goal.unwrap(), 5); assert_eq!(auto, false); } _ => panic!(), } } } #[test] fn parse_add_auto_command() { let inputs = ["add-auto eat 2", "aa eat 2"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Add(name, goal, auto) => { assert_eq!(name, "eat"); assert_eq!(goal.unwrap(), 2); assert_eq!(auto, true); } _ => panic!(), } } } #[test] fn parse_delete_command() { let inputs = ["delete eat", "d eat"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Delete(name) => { assert_eq!(name, "eat"); } _ => panic!(), } } } #[test] fn parse_delete_long_name_command() { let inputs = ["delete \"eat healthy\"", "d \"eat healthy\""]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Delete(name) => { assert_eq!(name, "eat healthy"); } _ => panic!(), } } } #[test] fn parse_track_up_command() { let inputs = ["track-up eat", "tup eat"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::TrackUp(name) => { assert_eq!(name, "eat"); } _ => panic!(), } } } #[test] fn parse_track_down_command() { let inputs = ["track-down eat", "tdown eat"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::TrackDown(name) => { assert_eq!(name, "eat"); } _ => panic!(), } } } #[test] fn parse_help_command() { let inputs = ["help add", "? add", "h add"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Help(name) => { assert_eq!(name.unwrap(), "add"); } _ => panic!(), } } } #[test] fn parse_help_global_command() { let inputs = ["help", "?", "h"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); match result.unwrap() { Command::Help(name) => { assert!(name.is_none()); } _ => panic!(), } } } #[test] fn parse_month_prev_command() { let result = Command::from_string("mprev"); assert!(result.is_ok()); assert_eq!(result.unwrap(), Command::MonthPrev); } #[test] fn parse_month_next_command() { let result = Command::from_string("mnext"); assert!(result.is_ok()); assert_eq!(result.unwrap(), Command::MonthNext); } #[test] fn parse_quit_command() { let inputs = ["q", "quit"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); assert_eq!(result.unwrap(), Command::Quit); } } #[test] fn parse_write_command() { let inputs = ["w", "write"]; for input in inputs.iter() { let result = Command::from_string(input); assert!(result.is_ok()); assert_eq!(result.unwrap(), Command::Write); } } #[test] fn parse_no_command() { let result = Command::from_string(""); assert!(result.is_ok()); assert_eq!(result.unwrap(), Command::Blank); } #[test] fn parse_error_invalid_command() { let input = "non-existing-command".to_owned(); let result = Command::from_string(&input); assert!(result.is_err()); assert_eq!( result.err().unwrap(), CommandLineError::InvalidCommand(input) ); } #[test] fn parse_error_not_enough_args() { let test_cases = [ ("add".to_owned(), "add".to_owned(), 2), ("add-auto".to_owned(), "add-auto".to_owned(), 2), ("delete".to_owned(), "delete".to_owned(), 1), ("track-up".to_owned(), "track-up".to_owned(), 1), ("track-down".to_owned(), "track-down".to_owned(), 1), ]; for test_case in test_cases.iter() { let result = Command::from_string(&test_case.0); assert!(result.is_err()); assert_eq!( result.err().unwrap(), CommandLineError::NotEnoughArgs(test_case.1.clone(), test_case.2) ); } } #[test] fn parse_error_invalid_arg() { let test_cases = [ ("add habit n".to_owned(), 2), ("add-auto habit n".to_owned(), 2), ]; for test_case in test_cases.iter() { let result = Command::from_string(&test_case.0); assert!(result.is_err()); assert_eq!( result.err().unwrap(), CommandLineError::InvalidArg(test_case.1) ); } } }