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telescreen_handler.rs
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telescreen_handler.rs
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use regex::{Captures, Regex};
use router::{Router, Rule};
use slack::{Event, EventHandler, Message, RtmClient};
pub struct TelescreenHandler {
router: Router,
username_regex: Regex,
}
impl TelescreenHandler {
pub fn new(router: Router) -> TelescreenHandler {
TelescreenHandler {
router: router,
username_regex: Regex::new(r"<@(.+)>").unwrap(),
}
}
pub fn send_message(&self,
cli: &RtmClient,
source_channel_id: &str,
source_user_id: &str,
source_text: &str) {
let channel_name = self.get_channel_name_from_id(cli, source_channel_id);
let unwrapped_channel_name = match channel_name {
None => {
warn!("No channel: {:?}", source_channel_id);
return;
}
Some(c) => c,
};
let user_name = self.get_user_name_from_id(cli, source_user_id);
let unwrapped_user_name = match user_name {
None => {
warn!("No user: {:?}", user_name);
return;
}
Some(t) => t,
};
let rules: &Vec<Rule> = self.router.rules.as_ref();
for rule in rules {
if rule.regex.is_match(unwrapped_channel_name) {
let dest_channel_id = cli.start_response()
.channels
.as_ref()
.and_then(|channels| {
channels
.iter()
.find(|chan| match chan.name {
None => false,
Some(ref name) => name == &(rule.destination),
})
})
.and_then(|chan| chan.id.as_ref());
let dest_channel_id_unwrap = match dest_channel_id {
None => {
warn!("No channel: {:?}", dest_channel_id);
return;
}
Some(c) => c,
};
if unwrapped_channel_name != &(rule.destination) {
let replaced_source_text = self.username_regex
.replace_all(source_text, |caps: &Captures| {
format!("@{}",
self.get_user_name_from_id(cli, &caps[1])
.unwrap_or(&String::from("unknown")))
});
let message = format!("{:} [ <#{}> ]:\n{:}",
unwrapped_user_name,
source_channel_id,
replaced_source_text);
info!("MESSAGE: {:?}", message);
let _ = cli.sender().send_message(&dest_channel_id_unwrap, &message);
}
}
}
}
fn get_channel_name_from_id<'a>(&self,
cli: &'a RtmClient,
channel_id: &str)
-> Option<&'a String> {
cli.start_response()
.channels
.as_ref()
.and_then(|channels| {
channels
.iter()
.find(|chan| match chan.id {
None => false,
Some(ref id) => id == channel_id,
})
})
.and_then(|chan| chan.name.as_ref())
}
fn get_user_name_from_id<'a>(&self, cli: &'a RtmClient, user_id: &str) -> Option<&'a String> {
cli.start_response()
.users
.as_ref()
.and_then(|users| {
users
.iter()
.find(|user| match user.id {
None => false,
Some(ref name) => name.to_string() == user_id,
})
})
.and_then(|user| user.name.as_ref())
}
}
#[allow(unused_variables)]
impl EventHandler for TelescreenHandler {
fn on_event(&mut self, cli: &RtmClient, event: Event) {
debug!("EVENT: {:?}", event);
match event {
Event::Message(event) => {
match *event {
Message::Standard(message) => {
let source_channel_id = match message.channel {
None => {
warn!("No channel: {:?}", message.channel);
return;
}
Some(c) => c,
};
let source_user_id = match message.user {
None => {
warn!("No user: {:?}", message.user);
return;
}
Some(u) => u,
};
let source_text = match message.text {
None => {
warn!("No text: {:?}", message.text);
return;
}
Some(t) => t,
};
self.send_message(cli, &source_channel_id, &source_user_id, &source_text);
}
_ => { /* noop */ }
}
}
_ => { /* noop */ }
}
}
fn on_close(&mut self, cli: &RtmClient) {
info!("Disconnected");
}
fn on_connect(&mut self, cli: &RtmClient) {
info!("Connected");
}
}