feat: basic peers collector functionality

src/main.rs

@@ -1,21 +1,50 @@
-use std::net::SocketAddr;
+use std::{net::SocketAddr, collections::HashSet};
 
 use serde::Deserialize;
 
-use clap::Parser;
+use clap::{Parser, Subcommand};
 
 use axum::{routing::get, extract::Query, Json, Router};
+use set::{SetHandle, InstanceRelation, create_set_collector};
 
 use crate::{model::{MapResult, MapHandle, create_map_collector}, cache::CACHE};
 
 mod model;
+mod set;
 mod cache;
+mod nodeinfo;
+
+mod entities;
 
 #[derive(Debug, Parser)]
 /// an API crawling akkoma bubble instances network and creating a map
 struct CliArgs {
-	/// start the server listening on this host
-	host: Option<String>,
+	#[clap(subcommand)]
+	/// action to perform
+	action: CliAction,
+}
+
+#[derive(Debug, Clone, Subcommand)]
+/// available actions which the process can do
+enum CliAction {
+	/// Serve an API providing routes for all actions
+	Serve {
+		/// start the server listening on this host
+		host: Option<String>,
+	},
+
+	/// Crawl local bubble domains and construct local bubble map
+	Bubble { },
+
+	/// Crawl known peers and build network set and unknowns map
+	Peers {
+		/// starting domain
+		domain: String,
+
+		/// maximum recursion depth, leave 0 for unbounded crawling
+		#[arg(long, short, default_value_t = 10)]
+		maxdepth: usize,
+	},
 }
 
 #[tokio::main]
@@ -24,19 +53,37 @@ async fn main() {
 
 	let args = CliArgs::parse();
 
-	let app = Router::new()
-		.route("/crawl", get(route_crawl_domain));
+	match args.action {
+		CliAction::Serve { host } => {
+			let app = Router::new()
+				.route("/crawl", get(route_crawl_domain));
 
-	let addr = match args.host {
-		Some(host) => host.parse().expect("could not parse provided host"),
-		None => SocketAddr::from(([127, 0, 0, 1], 18811)),
-	};
+			let addr = match host {
+				Some(host) => host.parse().expect("could not parse provided host"),
+				None => SocketAddr::from(([127, 0, 0, 1], 18811)),
+			};
+
+			tracing::debug!("listening on {}", addr);
+			axum::Server::bind(&addr)
+				.serve(app.into_make_service())
+				.await
+				.expect("could not serve axum app");
+		},
+
+		CliAction::Peers { domain, maxdepth } => {
+			let (collector, handle) = create_set_collector();
+			peers_crawl_instance(&domain, handle, 0, maxdepth).await;
+			let results = collector.collect().await;
+			tracing::info!("discovered {} instances", results.whole.len());
+			// for instance in &results.instances {
+			// 	tracing::info!("instance {} doesn't know {} other instances", instance.domain, instance.relations.len());
+			// }
+			// println!("{}", serde_json::to_string(&results).expect("could not serialize set result"));
+		}
+
+		_ => {},
+	}
 
-	tracing::debug!("listening on {}", addr);
-	axum::Server::bind(&addr)
-		.serve(app.into_make_service())
-		.await
-		.expect("could not serve axum app");
 }
 
 #[derive(Debug, Deserialize)]
@@ -47,44 +94,56 @@ struct Params {
 async fn route_crawl_domain(Query(params): Query<Params>) -> Json<MapResult> {
 	tracing::info!("starting new crawl from {}", params.domain);
 	let (collector, handle) = create_map_collector();
-	scan_instance(&params.domain, handle).await;
+	bubble_crawl_instance(&params.domain, handle).await;
 	axum::Json(collector.collect().await)
 }
 
+
 #[async_recursion::async_recursion]
-async fn scan_instance(domain: &str, map: MapHandle) {
+async fn peers_crawl_instance(domain: &str, set: SetHandle, depth: usize, maxdepth: usize) {
+	if depth >= maxdepth { return };
+	if set.already_scanned(domain).await { return };
+
+	match reqwest::get(format!("https://{}/api/v1/instance/peers", domain)).await {
+		Err(e) => return tracing::error!("could not fetch peer list for {} : {}", domain, e),
+		Ok(x) => {
+			let peers : Vec<String> = x.json().await.unwrap_or(vec![]);
+			set.add_instance(InstanceRelation {
+				domain: domain.to_string(),
+				// relations: HashSet::from_iter(peers.iter().cloned()),
+				relations: HashSet::new(),
+			});
+			tracing::info!("{} found: {} peers", domain, peers.len());
+			for peer in peers {
+				let _set = set.clone();
+				tokio::spawn(async move {
+					peers_crawl_instance(&peer, _set, depth + 1, maxdepth).await;
+				});
+			}
+		}
+	}
+}
+
+#[async_recursion::async_recursion]
+async fn bubble_crawl_instance(domain: &str, map: MapHandle) {
 	if map.already_scanned(domain).await { return };
 
 	tracing::debug!("scanning instance {}", domain);
-	let response = match CACHE.instance_metadata(domain).await {
-		Ok(Some(r)) => r,
-		Ok(None) => {
-			tracing::info!("instance {} doesn't provide nodeinfo api", domain);
-			return map.add_node(domain.to_string(), domain.to_string());
-		},
-		Err(e) => {
-			return tracing::warn!("could not fetch metadata for {}: {}", domain, e);
-		}
+	let info = match CACHE.instance_metadata(domain).await {
+		Ok(r) => r,
+		Err(e) => return tracing::warn!("could not fetch metadata for {}: {}", domain, e),
 	};
 
-	let metadata = match response.get("metadata") {
-		Some(m) => m,
-		None => {
-			tracing::info!("instance {} doesn't provide metadata", domain);
-			return map.add_node(domain.to_string(), domain.to_string());
-		}
-	};
-
-	let node_name = match metadata.get("nodeName") {
-		Some(v) => v.as_str().unwrap_or("").to_string(),
-		None => domain.to_string(),
-	};
+	let node_name = info.metadata
+		.get("nodeName")
+		.map(|x| x.as_str().expect("nodeName is not a string"))
+		.unwrap_or(domain);
 
 	tracing::info!("adding instance {} ({})", node_name, domain);
 
-	map.add_node(domain.to_string(), node_name);
+	map.add_node(domain.to_string(), node_name.to_string());
 
-	let local_bubble = match metadata.get("localBubbleInstances") {
+	let local_bubble = match info.metadata.get("localBubbleInstances") {
 		None => return tracing::info!("instance {} doesn't provide local bubble data", domain),
 		Some(b) => match b.as_array() {
 			None => return tracing::warn!("instance {} local bubble is not an array", domain),
@@ -97,6 +156,6 @@ async fn scan_instance(domain: &str, map: MapHandle) {
 	for bubble_instance in local_bubble.iter().filter_map(|x| x.as_str().map(|x| x.to_string())) {
 		let _map = map.clone();
 		map.add_vertex(domain.to_string(), bubble_instance.clone());
-		tasks.push(tokio::spawn(async move { scan_instance(&bubble_instance, _map).await; }));
+		tasks.push(tokio::spawn(async move { bubble_crawl_instance(&bubble_instance, _map).await; }));
 	}
 }

src/set.rs

@@ -0,0 +1,68 @@
+use std::{collections::{HashSet, HashMap}, sync::Arc};
+
+use serde::Serialize;
+use tokio::sync::{mpsc, RwLock};
+
+#[derive(Debug)]
+pub struct SetCollector {
+	known_network: HashSet<String>,
+	instance_rx: mpsc::UnboundedReceiver<InstanceRelation>,
+}
+
+pub fn create_set_collector() -> (SetCollector, SetHandle) {
+	let (instance_tx, instance_rx) = mpsc::unbounded_channel();
+	let known_network = HashSet::new();
+	let scanned = Arc::new(RwLock::new(HashSet::new()));
+	(
+		SetCollector { known_network, instance_rx },
+		SetHandle { scanned, instance_tx },
+	)
+}
+
+impl SetCollector {
+	pub async fn collect(mut self) -> SetResult {
+		let mut in_instances : Vec<InstanceRelation> = Vec::new();
+		let mut out_instances = Vec::new();
+		while let Some(instance) = self.instance_rx.recv().await {
+			self.known_network.insert(instance.domain.clone());
+			// in_instances.push(instance);
+		}
+		for instance in in_instances {
+			out_instances.push(InstanceRelation {
+				domain: instance.domain,
+				relations: self.known_network.difference(&instance.relations).map(|x| x.clone()).collect(),
+			});
+		}
+		SetResult { whole: self.known_network, instances: out_instances }
+	}
+}
+
+#[derive(Debug, Clone)]
+pub struct SetHandle {
+	scanned: Arc<RwLock<HashSet<String>>>,
+	instance_tx: mpsc::UnboundedSender<InstanceRelation>,
+}
+
+impl SetHandle {
+	pub async fn already_scanned(&self, domain: &str) -> bool {
+		if self.scanned.read().await.contains(domain) { return true; }
+		self.scanned.write().await.insert(domain.to_string());
+		false
+	}
+
+	pub fn add_instance(&self, instance: InstanceRelation) {
+		self.instance_tx.send(instance).expect("could not send instance to collector")
+	}
+}
+
+#[derive(Serialize, Clone, Debug)]
+pub struct InstanceRelation {
+	pub domain: String,
+	pub relations: HashSet<String>,
+}
+
+#[derive(Serialize, Clone, Debug)]
+pub struct SetResult {
+	pub whole: HashSet<String>,
+	pub instances: Vec<InstanceRelation>,
+}