Switch to fetching instances from group

Rather than having configuration file based instance list. Having both
is an option but the trend is generally using group instances for events.

README.md

@@ -13,20 +13,11 @@ Not a lot of metrics are collected at the moment. Just the ones I care about.
 Configuration is done with a `config.toml` file with the following format:
 
 ```toml
-instances = [
-  { name = "optional instance name"
-  , url = "https://vrchat.com/home/launch?worldId=wrld_123&instanceId=123" 
-  },
-  { name = "another instance"
-  , instance = "234"
-  , world = "wrld_234" 
-  }
-]
-
+group = "group_7f23c663-e3c5-408f-bfb3-02b164f9e921"
 vrcdn = "vrcdn_stream_name"
 ```
 
-Instances can either be the URL or instance and world ID seperated out, the later taking priority over the former.
+Instances will be retrieved from the group.
 
 Runs on port `6534`, on all interfaces. May be configurable in the future.
 

src/main.rs

@@ -1,4 +1,3 @@
-use std::collections::HashMap;
 use std::error::Error;
 use std::{env, fmt, fs};
 
@@ -10,11 +9,10 @@ use axum::{
     routing::get,
     Router,
 };
+use lazy_static::lazy_static;
 use maud::html;
 use maud::Markup;
 use prometheus::{register_gauge_vec, Encoder, GaugeVec, TextEncoder};
-
-use lazy_static::lazy_static;
 use reqwest::header::USER_AGENT;
 use serde::Deserialize;
 use url::Url;
@@ -68,21 +66,21 @@ impl fmt::Display for WsError {
 #[derive(Clone, Debug, Deserialize)]
 struct Config {
     vrcdn: Option<String>,
-    instances: Option<Vec<VrcInstance>>,
+    group: Option<String>,
     vrchat_token: Option<String>,
 }
 
 #[derive(Clone, Debug, Deserialize)]
 struct VrcInstance {
-    /// Full invite URL. Takes precedence over instance and world.
-    url: Option<String>,
     /// Instance ID.
     instance: Option<String>,
     /// World ID.
     world: Option<String>,
+    /// Raw location
+    location: Option<String>,
     /// Custom name for the instance.
     #[serde(skip)]
-    name: Option<String>
+    name: Option<String>,
 }
 
 #[derive(Clone, Debug, Deserialize)]
@@ -101,6 +99,11 @@ struct VrCdnRegion {
     total: f64,
 }
 
+#[derive(Clone, Debug, Deserialize)]
+struct VrcGroupInstance {
+    location: String,
+}
+
 #[tokio::main]
 async fn main() -> Result<(), ()> {
     let content = fs::read_to_string("config.toml").unwrap();
@@ -111,7 +114,7 @@ async fn main() -> Result<(), ()> {
         .route("/", get(homepage))
         .route("/metrics", get(metrics_handler))
         .with_state(config);
-    
+
     let _ = axum::Server::bind(&"0.0.0.0:6534".parse().unwrap())
         .serve(app.into_make_service())
         .await;
@@ -143,45 +146,52 @@ async fn metrics(config: Config) -> Result<Vec<u8>, WsError> {
     let encoder = TextEncoder::new();
     let client = reqwest::Client::new();
     let auth_cookie = format!("auth={}", &config.vrchat_token.unwrap());
+    let mut instances: Vec<VrcInstance> = vec![];
 
-    // Do work.
-    for instance in config.instances.ok_or(WsError::Custom("".to_owned()))? {
-        let (instance_id, world_id): (String, String) = if instance.url.is_none() {
-            (
-                instance.instance.ok_or(WsError::Custom("".to_owned()))?,
-                instance.world.ok_or(WsError::Custom("".to_owned()))?,
-            )
-        } else {
-            let url = Url::parse(&instance.url.unwrap_or("".to_owned()))?;
-            let hash_query: HashMap<_, _> = url.query_pairs().into_owned().collect();
-            (
-                hash_query
-                    .get("instanceId")
-                    .ok_or(WsError::Custom("".to_owned()))?
-                    .to_string(),
-                hash_query
-                    .get("worldId")
-                    .ok_or(WsError::Custom("".to_owned()))?
-                    .to_string(),
-            )
-        };
+    // Check if we can fetch instances from a group if set.
+    if config.group.is_some() {
         let api_url = format!(
-            "https://api.vrchat.cloud/api/1/instances/{0}:{1}",
-            world_id, instance_id
+            "https://api.vrchat.cloud/api/1/groups/{}/instances",
+            config.group.unwrap()
+        );
+        let url = Url::parse(&api_url).unwrap();
+        let req = client
+            .get(url)
+            .header(
+                USER_AGENT,
+                "vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
+            )
+            .header("Cookie", &auth_cookie)
+            .send()
+            .await?;
+        let data: Vec<VrcGroupInstance> = req.json().await?;
+        instances = data.into_iter().map(|f| {
+            let spl: Vec<&str> = f.location.split(":").collect();
+            VrcInstance{ instance: Some(spl[0].to_owned()), world: Some(spl[1].to_owned()), location: Some(f.location), name: None  }
+        }).collect();
+    }
+
+    for instance in instances {
+        let api_url = format!(
+            "https://api.vrchat.cloud/api/1/instances/{}",
+            &instance.location.clone().unwrap()
         );
         let url = Url::parse(&api_url).unwrap();
 
         let req = client
             .get(url)
-            .header(USER_AGENT, "vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)")
+            .header(
+                USER_AGENT,
+                "vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
+            )
             .header("Cookie", &auth_cookie)
             .send()
             .await?;
 
         let data: VrcInstanceData = req.json().await?;
-        let name = instance.name.unwrap_or(instance_id.clone());
+        let name = instance.name.unwrap_or(instance.location.unwrap());
         PLAYER_COUNT
-            .with_label_values(&[&world_id, &instance_id, &name])
+            .with_label_values(&[&instance.world.unwrap(), &instance.instance.unwrap(), &name])
             .set(data.user_count.unwrap_or(0 as f64));
     }
 
@@ -191,7 +201,10 @@ async fn metrics(config: Config) -> Result<Vec<u8>, WsError> {
     );
     let req = client
         .get(vrcdn_url)
-        .header(USER_AGENT, "vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)")
+        .header(
+            USER_AGENT,
+            "vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
+        )
         .send()
         .await
         .unwrap();