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|
use anyhow::{anyhow, Context, Error};
use libangelshark::{AcmRunner, Message, ParallelIterator};
use log::error;
use std::{
collections::HashMap,
env,
sync::{Arc, Mutex},
};
const ANGELSHARKD_EXT_SEARCH_ACMS: &str = "ANGELSHARKD_EXT_SEARCH_ACMS";
const OSSI_STAT_NUMBER_FIELD: &str = "8005ff00";
const OSSI_STAT_ROOM_FIELD: &str = "0031ff00";
const OSSI_LIST_STAT_CMD: &str = "list station";
const OSSI_LIST_EXT_CMD: &str = "list extension-type";
/// Collection of search terms
pub type Needles = Vec<String>;
/// Collection of ACM extension types with ROOMs (if applicable) and ACM names
type HaystackEntries = Vec<Vec<String>>;
/// Represents a searchable, refreshable collection of ACM extension data.
#[derive(Clone)]
pub struct Haystack {
entries: Arc<Mutex<HaystackEntries>>,
runner: AcmRunner,
}
impl Haystack {
pub fn new(runner: AcmRunner) -> Self {
Self {
entries: Arc::new(Mutex::new(Vec::new())),
runner,
}
}
/// Searches for haystack entries that contain all given needles and returns them.
pub fn search(&self, needles: Needles) -> Result<HaystackEntries, Error> {
let needles: Vec<_> = needles.iter().map(|n| n.to_lowercase()).collect();
let entries = self
.entries
.lock()
.map_err(|e| anyhow!(e.to_string()))
.with_context(|| "Failed to get haystack inner data lock.")?;
let matches = entries
.iter()
.filter(|entry| {
let entry_str = entry.join("").to_lowercase();
needles
.iter()
.all(|needle| entry_str.contains(needle.as_str()))
})
.cloned()
.collect();
Ok(matches)
}
/// Refreshes the haystack data by running relevant commands on a runner,
/// parsing the results, and updating the entries field with the fresh data.
/// TODO: Do we want simultaneous refreshes to be possible?
/// TODO: The entry generation could probably be simplified and the number of clones reduced.
pub fn refresh(&self) -> Result<(), Error> {
let mut runner = self.runner.to_owned();
// Queue jobs in ACM runner
let configured_acms = env::var(ANGELSHARKD_EXT_SEARCH_ACMS).with_context(|| {
format!(
"{} var missing. Cannot refresh haystack.",
ANGELSHARKD_EXT_SEARCH_ACMS
)
})?;
// Generate jobs and queue on runner.
for acm in configured_acms.split_whitespace() {
runner
.queue_input(acm, &Message::new(OSSI_LIST_EXT_CMD))
.queue_input(
acm,
&Message {
command: String::from(OSSI_LIST_STAT_CMD),
fields: Some(vec![
String::from(OSSI_STAT_NUMBER_FIELD),
String::from(OSSI_STAT_ROOM_FIELD),
]),
datas: None,
error: None,
},
);
}
// Run jobs and collect output. Filter out uneeded commands, combine errors.
let output: Result<Vec<(String, Vec<Message>)>, Error> = runner
.run()
.map(|(name, output)| {
let output: Vec<Message> = output?
.into_iter()
.filter(|m| m.command != "logoff")
.collect();
Ok((name, output))
})
.collect();
let output = output.with_context(|| "Failed to run refresh commands on ACM(s).")?;
// Log any ACM errors encountered
for error in output
.iter()
.map(|(_, messages)| messages)
.flatten()
.filter_map(|m| m.error.as_ref())
{
error!("ACM error: {}", error);
}
// Build a map of station number-to-rooms
let rooms: HashMap<String, String> = output
.iter()
.map(|(_, messages)| {
messages
.iter()
.filter(|message| message.command == OSSI_LIST_STAT_CMD)
.filter_map(|message| message.datas.to_owned())
.flatten()
.filter_map(|stat| Some((stat.get(0)?.to_owned(), stat.get(1)?.to_owned())))
})
.flatten()
.collect();
// Build the haystack from the room map and extension-type output
let haystack: HaystackEntries = output
.into_iter()
.map(|(acm_name, messages)| {
let rooms = &rooms;
let acm_name = format!("CM{}", acm_name);
messages
.into_iter()
.filter(|message| message.command == OSSI_LIST_EXT_CMD)
.filter_map(|message| message.datas)
.flatten()
.map(move |mut extension| {
let room = extension
.get(0)
.map(|num| rooms.get(num))
.flatten()
.map(|room| room.to_owned())
.unwrap_or_else(String::new);
extension.push(acm_name.to_owned());
extension.push(room);
extension
})
})
.flatten()
.collect();
// Overwrite shared haystack entries with new data.
let mut lock = self
.entries
.lock()
.map_err(|e| anyhow!(e.to_string()))
.with_context(|| "Failed to get haystack inner data lock.")?;
*lock = haystack;
Ok(())
}
}
|
