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/// A single chat message in the log
#[derive(Clone)]
pub struct ChatLine {
pub nick: String,
pub text: String,
/// true = server/system message (JOIN, PART, topic, etc.)
pub is_system: bool,
/// true = NOTICE
pub is_notice: bool,
}
/// All mutable state the TUI needs to render and respond to input
pub struct AppState {
/// Our nick
pub nick: String,
/// The active channel name
pub channel: String,
/// Chat log for the active channel
pub messages: Vec<ChatLine>,
/// Member list for the active channel
pub members: Vec<String>,
/// Current contents of the input box
pub input: String,
/// Cursor position within `input` (byte index)
pub cursor: usize,
/// Status line text (connection state, errors, etc.)
pub status: String,
/// Whether we've fully registered
pub connected: bool,
}
impl AppState {
pub fn new() -> Self {
Self {
nick: String::new(),
channel: String::new(),
messages: Vec::new(),
members: Vec::new(),
input: String::new(),
cursor: 0,
status: "Set nick with /nick to connect.".into(),
connected: false,
}
}
/// Push a chat message
pub fn push_message(&mut self, nick: &str, text: &str) {
self.messages.push(ChatLine {
nick: nick.to_string(),
text: text.to_string(),
is_system: false,
is_notice: false,
});
}
/// Push a system/event line (joins, parts, topic changes)
pub fn push_system(&mut self, text: &str) {
self.messages.push(ChatLine {
nick: String::new(),
text: text.to_string(),
is_system: true,
is_notice: false,
});
}
/// Insert a character at the cursor
pub fn input_insert(&mut self, ch: char) {
self.input.insert(self.cursor, ch);
self.cursor += ch.len_utf8();
}
/// Delete the character before the cursor
pub fn input_backspace(&mut self) {
if self.cursor == 0 {
return;
}
// Find the start of the previous character
let prev = self.input[..self.cursor]
.char_indices()
.last()
.map(|(i, _)| i)
.unwrap_or(0);
self.input.remove(prev);
self.cursor = prev;
}
/// Move cursor left one character
pub fn cursor_left(&mut self) {
self.cursor = self.input[..self.cursor]
.char_indices()
.last()
.map(|(i, _)| i)
.unwrap_or(0);
}
/// Move cursor right one character
pub fn cursor_right(&mut self) {
if self.cursor < self.input.len() {
let ch = self.input[self.cursor..].chars().next().unwrap();
self.cursor += ch.len_utf8();
}
}
/// Take the current input, clear the box, return the text
pub fn take_input(&mut self) -> String {
self.cursor = 0;
std::mem::take(&mut self.input)
}
/// Sort and deduplicate the member list
pub fn sort_members(&mut self) {
self.members.sort_by(|a, b| {
// Strip sigils for sorting (@, +, %)
let a = a.trim_start_matches(&['@', '+', '%', '~', '&'][..]);
let b = b.trim_start_matches(&['@', '+', '%', '~', '&'][..]);
a.to_lowercase().cmp(&b.to_lowercase())
});
self.members.dedup();
}
}
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