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use super::Writer;
use super::{commands, Message, Token, TokenGen};
use log::*;
use std::io::Write;
#[cfg(feature = "hashbrown")]
use hashbrown::HashMap;
#[cfg(not(feature = "hashbrown"))]
use std::collections::HashMap;
pub type FilterFn<W> = Box<dyn FnMut(Message, Writer<W>) + Send + Sync>;
pub struct FilterId<W>(pub(super) FilterFn<W>, pub(super) Token);
pub struct FilterMap<W>(HashMap<Filter, Vec<FilterId<W>>>, TokenGen);
impl<W> Default for FilterMap<W> {
fn default() -> Self {
Self(HashMap::default(), TokenGen::default())
}
}
impl<W: Write> FilterMap<W> {
pub fn insert(&mut self, filter: Filter, f: FilterFn<W>) -> Token {
let token = self.1.next();
self.0.entry(filter).or_default().push(FilterId(f, token));
trace!("added filter for {:?} (id: {})", filter, token.0);
token
}
pub fn try_remove(&mut self, token: Token) -> bool {
for (filter, vals) in self.0.iter_mut() {
if let Some(pos) = vals.iter().position(|d| d.1 == token) {
trace!("removed filter for {:?} (id: {})", filter, token.0);
let _ = vals.remove(pos);
return true;
}
}
trace!("could not find a matching filter for id: {}", token.0);
false
}
#[allow(dead_code)]
pub(crate) fn get(&self, filter: Filter) -> Option<&Vec<FilterId<W>>> {
self.0.get(&filter)
}
pub(crate) fn get_mut(&mut self, filter: Filter) -> Option<&mut Vec<FilterId<W>>> {
self.0.get_mut(&filter)
}
}
macro_rules! filter_this {
($($t:ident),+ $(,)?) => {
$(impl MessageFilter for commands::$t {
fn to_filter() -> Filter {
Filter::$t
}
}
impl From<Message> for commands::$t {
fn from(msg: Message) -> Self {
match msg {
Message::$t(d @ commands::$t { .. }) => d,
_ => unreachable!(),
}
}
})*
};
}
filter_this!(
Join,
Part,
PrivMsg,
Mode,
NamesStart,
NamesEnd,
ClearChat,
ClearMsg,
HostTargetStart,
HostTargetEnd,
Notice,
Reconnect,
RoomState,
UserNotice,
UserState,
GlobalUserState,
);
#[derive(Copy, Clone, Debug, Hash, Eq, Ord, PartialEq, PartialOrd)]
pub enum Filter {
Irc,
Join,
Part,
PrivMsg,
Mode,
NamesStart,
NamesEnd,
ClearChat,
ClearMsg,
HostTargetStart,
HostTargetEnd,
Notice,
Reconnect,
RoomState,
UserNotice,
UserState,
GlobalUserState,
}
pub trait MessageFilter {
fn to_filter() -> Filter;
}
impl Message {
pub(crate) fn what_filter(&self) -> Filter {
use Filter::*;
match self {
Message::Join { .. } => Join,
Message::Part { .. } => Part,
Message::PrivMsg { .. } => PrivMsg,
Message::Mode { .. } => Mode,
Message::NamesStart { .. } => NamesStart,
Message::NamesEnd { .. } => NamesEnd,
Message::ClearChat { .. } => ClearChat,
Message::ClearMsg { .. } => ClearMsg,
Message::HostTargetStart { .. } => HostTargetStart,
Message::HostTargetEnd { .. } => HostTargetEnd,
Message::Notice { .. } => Notice,
Message::Reconnect { .. } => Reconnect,
Message::RoomState { .. } => RoomState,
Message::UserNotice { .. } => UserNotice,
Message::UserState { .. } => UserState,
Message::GlobalUserState { .. } => GlobalUserState,
Message::Irc { .. } => Irc,
}
}
}