659 lines
23 KiB
Rust
659 lines
23 KiB
Rust
use std::{collections::HashMap, env, fs::File, io::Read, sync::Arc};
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use serenity::{
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async_trait,
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futures::StreamExt,
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http::Http,
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model::{
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channel::Message,
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guild::Member,
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id::{ChannelId, GuildId, UserId},
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prelude::Ready,
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webhook::Webhook,
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},
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prelude::*,
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Client as DiscordClient,
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};
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use tokio::sync::Mutex;
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use irc::{
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client::{data::Config, Client as IrcClient, Sender},
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proto::Command,
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};
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use lazy_static::lazy_static;
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use regex::Regex;
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use pulldown_cmark::Parser;
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use serde::Deserialize;
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#[derive(Deserialize)]
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struct DircordConfig {
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token: String,
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webhook: Option<String>,
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nickname: Option<String>,
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server: String,
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port: Option<u16>,
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channel: String,
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mode: Option<String>,
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tls: Option<bool>,
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channel_id: u64,
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}
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struct Handler;
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#[async_trait]
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impl EventHandler for Handler {
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async fn message(&self, ctx: Context, msg: Message) {
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let nick = {
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if let Some(member) = msg.member {
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match member.nick {
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Some(n) => n,
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None => msg.author.name,
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}
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} else {
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msg.author.name
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}
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};
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let byte = nick.chars().nth(0).unwrap() as u8;
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let colour_index = (byte as usize + nick.len()) % 12;
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let formatted = format!("\x03{:02}", colour_index);
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let mut new_nick = String::with_capacity(formatted.len() + nick.len() + 2);
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new_nick.push_str(&formatted);
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new_nick.push_str(&nick);
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new_nick.push('\x0F');
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new_nick = format!(
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"{}\u{200B}{}",
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&new_nick[..formatted.len() + 1],
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&new_nick[formatted.len() + 1..]
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);
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let nick_bytes = new_nick.len() + 3; // +1 for the space and +2 for the <>
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let content_limit = 510 - nick_bytes;
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let (user_id, sender, members, channel_id, channel) = {
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let data = ctx.data.read().await;
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let user_id = data.get::<UserIdKey>().unwrap().to_owned();
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let sender = data.get::<SenderKey>().unwrap().to_owned();
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let members = data.get::<MembersKey>().unwrap().to_owned();
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let channel_id = data.get::<ChannelIdKey>().unwrap().to_owned();
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let channel = data.get::<StringKey>().unwrap().to_owned();
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(user_id, sender, members, channel_id, channel)
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};
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let attachments: Vec<String> = msg.attachments.iter().map(|a| a.url.clone()).collect();
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if msg.content.starts_with("```") {
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let mut lines = msg.content.split("\n").collect::<Vec<&str>>();
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// remove the backticks
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lines.remove(lines.len() - 1);
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lines.remove(0);
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if user_id != msg.author.id && !msg.author.bot && msg.channel_id == channel_id {
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for line in lines {
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send_irc_message(&sender, &channel, &format!("<{}> {}", new_nick, line))
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.await
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.unwrap();
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}
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for attachment in attachments {
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send_irc_message(&sender, &channel, &format!("<{}> {}", new_nick, attachment))
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.await
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.unwrap();
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}
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}
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return;
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}
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lazy_static! {
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static ref PING_RE_1: Regex = Regex::new(r"<@[0-9]+>").unwrap();
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static ref PING_RE_2: Regex = Regex::new(r"<@![0-9]+>").unwrap();
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static ref EMOJI_RE: Regex = Regex::new(r"<:\w+:[0-9]+>").unwrap();
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}
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let mut id_cache: HashMap<u64, String> = HashMap::new();
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if PING_RE_1.is_match(&msg.content) {
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for mat in PING_RE_1.find_iter(&msg.content) {
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let slice = &msg.content[mat.start() + 2..mat.end() - 1];
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let id = slice.parse::<u64>().unwrap();
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for member in &*members.lock().await {
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if id == member.user.id.0 {
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let nick = {
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match &member.nick {
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Some(n) => n.clone(),
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None => member.user.name.clone(),
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}
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};
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id_cache.insert(id, nick);
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}
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}
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}
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} else if PING_RE_2.is_match(&msg.content) {
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for mat in PING_RE_2.find_iter(&msg.content) {
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let slice = &msg.content[mat.start() + 3..mat.end() - 1];
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let id = slice.parse::<u64>().unwrap();
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for member in &*members.lock().await {
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if id == member.user.id.0 {
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let nick = {
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match &member.nick {
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Some(n) => n.clone(),
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None => member.user.name.clone(),
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}
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};
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id_cache.insert(id, nick);
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}
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}
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}
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}
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let mut computed = String::new();
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let mut replaced = msg.content.clone();
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for mat in PING_RE_1.find_iter(&msg.content) {
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let slice = &msg.content[mat.start() + 2..mat.end() - 1];
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let id = slice.parse::<u64>().unwrap();
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if let Some(cached) = id_cache.get(&id) {
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replaced = PING_RE_1
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.replace(&replaced, format!("@{}", cached))
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.to_string();
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}
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}
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for mat in PING_RE_2.find_iter(&msg.content) {
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let slice = &msg.content[mat.start() + 3..mat.end() - 1];
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let id = slice.parse::<u64>().unwrap();
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if let Some(cached) = id_cache.get(&id) {
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replaced = PING_RE_2
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.replace(&replaced, format!("@{}", cached))
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.to_string();
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}
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}
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for mat in EMOJI_RE.find_iter(&msg.content) {
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let slice = &msg.content[mat.start()..mat.end()];
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let parts = slice.split(':').collect::<Vec<&str>>();
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let formatted = format!(":{}:", parts[1]); // ignore the opening bracket in [0]
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replaced = EMOJI_RE.replace(&replaced, formatted).to_string();
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}
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{
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use pulldown_cmark::Event::*;
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use pulldown_cmark::Tag::*;
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let parser = Parser::new(&replaced);
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for event in parser {
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match event {
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Text(t) | Html(t) | Code(t) => computed.push_str(&format!("{} ", &t)),
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End(_) => computed.push('\x0F'),
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Start(tag) => match tag {
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Emphasis => computed.push('\x1D'),
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Strong => computed.push('\x02'),
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Link(_, dest, _) => computed.push_str(&dest),
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_ => {}
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},
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_ => {}
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}
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}
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}
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let chars = computed.chars().collect::<Vec<char>>();
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let chunks = chars.chunks(content_limit);
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if user_id != msg.author.id && !msg.author.bot && msg.channel_id == channel_id {
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if let Some(reply) = msg.referenced_message {
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let rnick = {
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if let Some(member) = reply.member {
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match member.nick {
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Some(n) => n,
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None => reply.author.name,
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}
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} else {
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reply.author.name
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}
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};
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let byte = rnick.chars().nth(0).unwrap() as u8;
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let colour_index = (byte as usize + rnick.len()) % 12;
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let formatted = format!("\x03{:02}", colour_index);
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let mut reply_nick = String::with_capacity(formatted.len() + rnick.len() + 2);
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reply_nick.push_str(&formatted);
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reply_nick.push_str(&rnick);
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reply_nick.push('\x0F');
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reply_nick = format!(
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"{}\u{200B}{}",
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&reply_nick[..formatted.len() + 1],
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&reply_nick[formatted.len() + 1..]
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);
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let mut content = reply.content;
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content = content.replace('\n', " ");
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content = content.replace("\r\n", " "); // just in case
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let reply_nick_bytes = reply_nick.len() + 3;
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let reply_content_limit = 510 - reply_nick_bytes - 5;
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let to_send = if content.len() > reply_content_limit {
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content.truncate(reply_content_limit);
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format!("> {}...", content)
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} else {
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format!("> {}", content)
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};
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send_irc_message(&sender, &channel, &format!("<{}> {}", reply_nick, to_send))
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.await
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.unwrap();
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}
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for chunk in chunks {
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let to_send = String::from_iter(chunk.iter());
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send_irc_message(&sender, &channel, &format!("<{}> {}", new_nick, to_send))
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.await
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.unwrap();
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}
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for attachment in attachments {
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send_irc_message(&sender, &channel, &format!("<{}> {}", new_nick, attachment))
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.await
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.unwrap();
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}
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}
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}
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async fn ready(&self, ctx: Context, info: Ready) {
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let id = info.user.id;
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let mut data = ctx.data.write().await;
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data.insert::<UserIdKey>(id);
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}
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async fn guild_member_addition(&self, ctx: Context, _: GuildId, new_member: Member) {
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let members = {
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let data = ctx.data.read().await;
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let members = data.get::<MembersKey>().unwrap().to_owned();
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members
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};
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members.lock().await.push(new_member);
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}
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}
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struct HttpKey;
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struct ChannelIdKey;
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struct UserIdKey;
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struct SenderKey;
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struct MembersKey;
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struct StringKey;
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impl TypeMapKey for HttpKey {
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type Value = Arc<Http>;
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}
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impl TypeMapKey for ChannelIdKey {
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type Value = ChannelId;
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}
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impl TypeMapKey for UserIdKey {
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type Value = UserId;
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}
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impl TypeMapKey for SenderKey {
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type Value = Sender;
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}
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impl TypeMapKey for MembersKey {
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type Value = Arc<Mutex<Vec<Member>>>;
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}
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impl TypeMapKey for StringKey {
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type Value = String;
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}
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#[tokio::main]
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async fn main() -> anyhow::Result<()> {
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let filename = env::args().nth(1).unwrap_or(String::from("config.toml"));
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let mut data = String::new();
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File::open(filename)?.read_to_string(&mut data)?;
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let conf: DircordConfig = toml::from_str(&data)?;
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let mut discord_client = DiscordClient::builder(&conf.token)
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.event_handler(Handler)
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.await?;
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let channel_id = ChannelId(conf.channel_id);
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let config = Config {
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nickname: conf.nickname,
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server: Some(conf.server),
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port: conf.port,
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channels: vec![conf.channel.clone()],
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use_tls: conf.tls,
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umodes: conf.mode,
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..Config::default()
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};
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let irc_client = IrcClient::from_config(config).await?;
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let http = discord_client.cache_and_http.http.clone();
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let members = Arc::new(Mutex::new(
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channel_id
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.to_channel(discord_client.cache_and_http.clone())
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.await?
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.guild()
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.unwrap() // we can panic here because if it's not a guild channel then the bot shouldn't even work
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.guild_id
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.members(&http, None, None)
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.await?,
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));
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{
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let mut data = discord_client.data.write().await;
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data.insert::<SenderKey>(irc_client.sender());
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data.insert::<MembersKey>(members.clone());
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data.insert::<ChannelIdKey>(channel_id);
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data.insert::<StringKey>(conf.channel);
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}
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let webhook = parse_webhook_url(http.clone(), conf.webhook)
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.await
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.expect("Invalid webhook URL");
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tokio::spawn(async move {
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irc_loop(irc_client, http, channel_id, webhook, members)
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.await
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.unwrap();
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});
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discord_client.start().await?;
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Ok(())
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}
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async fn send_irc_message(sender: &Sender, channel: &str, content: &str) -> anyhow::Result<()> {
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sender.send_privmsg(channel, content)?;
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Ok(())
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}
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async fn irc_loop(
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mut client: IrcClient,
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http: Arc<Http>,
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channel_id: ChannelId,
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webhook: Option<Webhook>,
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members: Arc<Mutex<Vec<Member>>>,
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) -> anyhow::Result<()> {
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let mut avatar_cache: HashMap<String, Option<String>> = HashMap::new();
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let mut id_cache: HashMap<String, Option<u64>> = HashMap::new();
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lazy_static! {
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static ref PING_NICK_1: Regex = Regex::new(r"^[\w+]+(:|,)").unwrap();
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static ref PING_RE_2: Regex = Regex::new(r"@[^0-9\s]+").unwrap();
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static ref CONTROL_CHAR_RE: Regex =
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Regex::new(r"\x1f|\x02|\x12|\x0f|\x16|\x03(?:\d{1,2}(?:,\d{1,2})?)?").unwrap();
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static ref WHITESPACE_RE: Regex = Regex::new(r"^\s").unwrap();
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}
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client.identify()?;
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let mut stream = client.stream()?;
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while let Some(orig_message) = stream.next().await.transpose()? {
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print!("{}", orig_message);
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if let Command::PRIVMSG(_, ref message) = orig_message.command {
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let nickname = orig_message.source_nickname().unwrap();
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let mut mentioned_1: Option<u64> = None;
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if PING_NICK_1.is_match(message) {
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if let Some(mat) = PING_NICK_1.find(message) {
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let slice = &message[mat.start()..mat.end() - 1];
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if let Some(id) = id_cache.get(slice) {
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mentioned_1 = id.to_owned();
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} else {
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let mut found = false;
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for member in &*members.lock().await {
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let nick = match &member.nick {
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Some(s) => s.to_owned(),
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None => member.user.name.clone(),
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};
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if slice.starts_with(&nick) {
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found = true;
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let id = member.user.id.0;
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mentioned_1 = Some(id);
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}
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}
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if !found {
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mentioned_1 = None;
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}
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}
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}
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}
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if PING_RE_2.is_match(message) {
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for mat in PING_RE_2.find_iter(message) {
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let slice = &message[mat.start() + 1..mat.end()];
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dbg!(slice);
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if id_cache.get(slice).is_none() {
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let mut found = false;
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for member in &*members.lock().await {
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let nick = match &member.nick {
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Some(s) => s.to_owned(),
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None => member.user.name.clone(),
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};
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if slice.starts_with(&nick) {
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found = true;
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let id = member.user.id.0;
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id_cache.insert(slice.to_string(), Some(id));
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break;
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}
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}
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if !found {
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id_cache.insert(slice.to_string(), None);
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}
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}
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}
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}
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if let Some(ref webhook) = webhook {
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if avatar_cache.get(nickname).is_none() {
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let mut found = false;
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for member in &*members.lock().await {
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let nick = match &member.nick {
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Some(s) => s.to_owned(),
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None => member.user.name.clone(),
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};
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if nick == nickname {
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found = true;
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let avatar_url = member.user.avatar_url();
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avatar_cache.insert(nickname.to_string(), avatar_url);
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break;
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}
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}
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if !found {
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avatar_cache.insert(nickname.to_string(), None); // user is not in the guild
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}
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}
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webhook
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.execute(&http, false, |w| {
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if let Some(cached) = avatar_cache.get(nickname) {
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if let &Some(ref url) = cached {
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w.avatar_url(url);
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}
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}
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let mut computed = message.to_string();
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let mut is_code = false;
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if WHITESPACE_RE.is_match(&computed) {
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computed = format!("`{}`", computed);
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is_code = true;
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}
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if !is_code {
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for mat in PING_RE_2.find_iter(message) {
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let slice = &message[mat.start() + 1..mat.end()];
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if let Some(cached) = id_cache.get(slice) {
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if let &Some(id) = cached {
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computed = PING_RE_2
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.replace(&computed, format!("<@{}>", id))
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.to_string();
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}
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}
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}
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if let Some(id) = mentioned_1 {
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computed = PING_NICK_1
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.replace(&computed, format!("<@{}>", id))
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.to_string();
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}
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let mut has_opened_bold = false;
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let mut has_opened_italic = false;
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for c in computed.clone().chars() {
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|
if c == '\x02' {
|
|
computed = computed.replace('\x02', "**");
|
|
has_opened_bold = true;
|
|
}
|
|
|
|
if c == '\x1D' {
|
|
computed = computed.replace('\x1D', "*");
|
|
has_opened_italic = true;
|
|
}
|
|
|
|
if c == '\x0F' {
|
|
if has_opened_italic {
|
|
computed = computed.replace('\x0F', "*");
|
|
has_opened_italic = false;
|
|
} else if has_opened_bold {
|
|
computed = computed.replace('\x0F', "**");
|
|
has_opened_bold = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if has_opened_italic {
|
|
computed.push_str("*");
|
|
has_opened_italic = false;
|
|
}
|
|
|
|
if has_opened_bold {
|
|
computed.push_str("**");
|
|
has_opened_bold = false;
|
|
}
|
|
|
|
computed = CONTROL_CHAR_RE.replace_all(&computed, "").to_string();
|
|
}
|
|
w.username(nickname);
|
|
w.content(computed);
|
|
w
|
|
})
|
|
.await?;
|
|
} else {
|
|
let mut computed = message.to_string();
|
|
|
|
for mat in PING_RE_2.find_iter(message) {
|
|
let slice = &message[mat.start() + 1..mat.end()];
|
|
if let Some(cached) = id_cache.get(slice) {
|
|
if let &Some(id) = cached {
|
|
computed = PING_RE_2
|
|
.replace(&computed, format!("<@{}>", id))
|
|
.to_string();
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Some(id) = mentioned_1 {
|
|
computed = PING_NICK_1
|
|
.replace(&computed, format!("<@{}>", id))
|
|
.to_string();
|
|
}
|
|
|
|
let mut has_opened_bold = false;
|
|
let mut has_opened_italic = false;
|
|
|
|
for c in computed.clone().chars() {
|
|
if c == '\x02' {
|
|
computed = computed.replace('\x02', "**");
|
|
has_opened_bold = true;
|
|
}
|
|
|
|
if c == '\x1D' {
|
|
computed = computed.replace('\x1D', "*");
|
|
has_opened_italic = true;
|
|
}
|
|
|
|
if c == '\x0F' {
|
|
if has_opened_italic {
|
|
computed = computed.replace('\x0F', "*");
|
|
has_opened_italic = false;
|
|
} else if has_opened_bold {
|
|
computed = computed.replace('\x0F', "**");
|
|
has_opened_bold = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if has_opened_italic {
|
|
computed.push_str("*");
|
|
has_opened_italic = false;
|
|
}
|
|
|
|
if has_opened_bold {
|
|
computed.push_str("**");
|
|
has_opened_bold = false;
|
|
}
|
|
|
|
channel_id
|
|
.say(&http, format!("<{}> {}", nickname, computed))
|
|
.await?;
|
|
}
|
|
} else if let Command::JOIN(_, _, _) = orig_message.command {
|
|
let nickname = orig_message.source_nickname().unwrap();
|
|
channel_id
|
|
.say(&http, format!("*{}* has joined the channel", nickname))
|
|
.await?;
|
|
} else if let Command::PART(_, ref reason) | Command::QUIT(ref reason) =
|
|
orig_message.command
|
|
{
|
|
let nickname = orig_message.source_nickname().unwrap();
|
|
let reason = reason
|
|
.as_ref()
|
|
.unwrap_or(&String::from("Connection closed"))
|
|
.to_string();
|
|
channel_id
|
|
.say(&http, format!("*{}* has quit ({})", nickname, reason))
|
|
.await?;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
async fn parse_webhook_url(
|
|
http: Arc<Http>,
|
|
url: Option<String>,
|
|
) -> anyhow::Result<Option<Webhook>> {
|
|
if let Some(url) = url {
|
|
let url = url.trim_start_matches("https://discord.com/api/webhooks/");
|
|
let split = url.split("/").collect::<Vec<&str>>();
|
|
let id = split[0].parse::<u64>()?;
|
|
let token = split[1].to_string();
|
|
let webhook = http.get_webhook_with_token(id, &token).await?;
|
|
Ok(Some(webhook))
|
|
} else {
|
|
Ok(None)
|
|
}
|
|
}
|