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use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
use std::fs;
use std::path::Path;
/// State for text input with multi-line support and special prefix parsing.
#[derive(Debug, Clone)]
pub struct InputState {
/// Current input text
text: String,
/// Cursor position in text
cursor: usize,
/// Lines of text (split by newlines)
lines: Vec<String>,
/// Current line being edited
current_line: usize,
/// Whether @ prefix is active (file attachment mode)
is_file_mode: bool,
/// File search query
file_query: String,
/// Available files for fuzzy search
available_files: Vec<String>,
/// Selected file index in search results
selected_file_index: usize,
/// Whether / prefix is active (command mode)
is_command_mode: bool,
/// Command being entered
command: String,
}
impl Default for InputState {
fn default() -> Self {
Self {
text: String::new(),
cursor: 0,
lines: vec![String::new()],
current_line: 0,
is_file_mode: false,
file_query: String::new(),
available_files: Vec::new(),
selected_file_index: 0,
is_command_mode: false,
command: String::new(),
}
}
}
impl InputState {
/// Create a new input state.
pub fn new() -> Self {
Self::default()
}
/// Get current input text.
pub fn text(&self) -> &str {
&self.text
}
/// Get cursor position.
pub fn cursor(&self) -> usize {
self.cursor
}
/// Check if in file attachment mode.
pub fn is_file_mode(&self) -> bool {
self.is_file_mode
}
/// Check if in command mode.
pub fn is_command_mode(&self) -> bool {
self.is_command_mode
}
/// Get current file search query.
pub fn file_query(&self) -> &str {
&self.file_query
}
/// Get filtered files matching query.
pub fn filtered_files(&self) -> Vec<String> {
let query_lower = self.file_query.to_lowercase();
self.available_files
.iter()
.filter(|f| f.to_lowercase().contains(&query_lower))
.cloned()
.collect()
}
/// Get selected file index.
pub fn selected_file_index(&self) -> usize {
self.selected_file_index
}
/// Get current command.
pub fn command(&self) -> &str {
&self.command
}
/// Set available files for fuzzy search.
pub fn set_available_files(&mut self, files: Vec<String>) {
self.available_files = files;
}
/// Load files from current working directory.
///
/// Filters out common ignore patterns:
/// - .git
/// - node_modules
/// - target
/// - __pycache__
/// - .venv
/// - venv
pub fn load_files_from_cwd(&mut self) {
let cwd = std::env::current_dir().unwrap_or_else(|_| Path::new(".").to_path_buf());
let ignore_patterns = [
".git",
"node_modules",
"target",
"__pycache__",
".venv",
"venv",
"dist",
"build",
".DS_Store",
];
self.available_files = fs::read_dir(&cwd)
.into_iter()
.flatten()
.filter_map(|entry| entry.ok())
.filter_map(|entry| entry.file_name().to_str().map(|s| s.to_string()))
.filter(|name| {
!ignore_patterns
.iter()
.any(|pattern| name.eq_ignore_ascii_case(pattern) || name.starts_with(pattern))
})
.collect();
}
/// Handle a key event.
///
/// Returns:
/// - `Some(text)` if Enter was pressed (submit message or command)
/// - `Some(file)` if a file was selected
/// - `None` otherwise
pub fn handle_key(&mut self, key: KeyEvent) -> Option<String> {
match key.code {
KeyCode::Char('@') => {
if !self.is_file_mode && !self.is_command_mode {
self.is_file_mode = true;
}
None
}
KeyCode::Char('/') => {
if !self.is_file_mode && !self.is_command_mode {
self.is_command_mode = true;
}
None
}
KeyCode::Char(c) => {
let is_ctrl_j = key.modifiers.contains(KeyModifiers::CONTROL) && c == 'j';
if is_ctrl_j {
self.insert_newline();
} else if self.is_file_mode {
self.file_query.push(c);
self.selected_file_index = 0;
} else if self.is_command_mode {
self.command.push(c);
} else {
self.insert_char(c);
}
None
}
KeyCode::Backspace => {
if self.is_file_mode {
if !self.file_query.is_empty() {
self.file_query.pop();
if self.file_query.is_empty() {
self.is_file_mode = false;
}
}
} else if self.is_command_mode {
self.command.pop();
if self.command.is_empty() {
self.is_command_mode = false;
}
} else {
self.backspace();
}
None
}
KeyCode::Left => {
if !self.is_file_mode && !self.is_command_mode && self.cursor > 0 {
self.cursor -= 1;
}
None
}
KeyCode::Right => {
if !self.is_file_mode && !self.is_command_mode && self.cursor < self.text.len() {
self.cursor += 1;
}
None
}
KeyCode::Up => {
if self.is_file_mode {
let filtered = self.filtered_files();
if !filtered.is_empty() {
self.selected_file_index = if self.selected_file_index == 0 {
filtered.len() - 1
} else {
self.selected_file_index - 1
};
}
}
None
}
KeyCode::Down => {
if self.is_file_mode {
let filtered = self.filtered_files();
if !filtered.is_empty() {
self.selected_file_index = (self.selected_file_index + 1) % filtered.len();
}
}
None
}
KeyCode::Enter => {
if self.is_file_mode {
let filtered = self.filtered_files();
if let Some(file) = filtered.get(self.selected_file_index) {
let file = file.clone();
self.is_file_mode = false;
self.file_query.clear();
self.selected_file_index = 0;
Some(format!("@{}", file))
} else {
None
}
} else if self.is_command_mode {
let command = self.command.clone();
self.is_command_mode = false;
self.command.clear();
Some(format!("/{}", command))
} else {
let text = self.text.clone();
self.clear();
Some(text)
}
}
KeyCode::Esc => {
if self.is_file_mode {
self.is_file_mode = false;
self.file_query.clear();
self.selected_file_index = 0;
}
if self.is_command_mode {
self.is_command_mode = false;
self.command.clear();
}
None
}
_ => None,
}
}
/// Insert a character at cursor position.
fn insert_char(&mut self, c: char) {
self.text.insert(self.cursor, c);
self.cursor += 1;
self.update_lines();
}
/// Insert a newline.
fn insert_newline(&mut self) {
self.text.insert(self.cursor, '\n');
self.cursor += 1;
self.update_lines();
}
/// Delete character before cursor.
fn backspace(&mut self) {
if self.cursor > 0 {
self.text.remove(self.cursor - 1);
self.cursor -= 1;
self.update_lines();
}
}
/// Clear input.
pub fn clear(&mut self) {
self.text.clear();
self.cursor = 0;
self.lines = vec![String::new()];
self.current_line = 0;
}
/// Update lines based on text.
fn update_lines(&mut self) {
self.lines = self.text.split('\n').map(|s| s.to_string()).collect();
if self.lines.is_empty() {
self.lines.push(String::new());
}
}
/// Update cursor position from current line.
#[allow(dead_code)]
fn update_cursor_from_lines(&mut self) {
let mut pos = 0;
for (i, line) in self.lines.iter().enumerate() {
if i == self.current_line {
self.cursor = pos + line.len();
return;
}
pos += line.len() + 1;
}
}
}