chore(monorepo): delta, january, quark

crates/quark/src/presence/entry.rs

@@ -0,0 +1,64 @@
+use std::env;
+
+use serde::{Deserialize, Serialize};
+
+lazy_static! {
+    pub static ref REGION_ID: u16 = env::var("REGION_ID")
+        .unwrap_or_else(|_| "0".to_string())
+        .parse()
+        .unwrap();
+    pub static ref REGION_KEY: String = format!("region{}", &*REGION_ID);
+}
+
+/// Compact presence information for a user
+#[derive(Serialize, Deserialize, Debug)]
+pub struct PresenceEntry {
+    /// Region this session exists in
+    ///
+    /// We can have up to 65535 regions
+    pub region_id: u16,
+
+    /// Unique session ID
+    pub session_id: u8,
+
+    /// Known flags about session
+    pub flags: u8,
+}
+
+impl PresenceEntry {
+    /// Create a new presence entry from a given session ID and known flags
+    pub fn from(session_id: u8, flags: u8) -> Self {
+        Self {
+            region_id: *REGION_ID,
+            session_id,
+            flags,
+        }
+    }
+}
+
+pub trait PresenceOp {
+    /// Find next available session ID
+    fn find_next_id(&self) -> u8;
+}
+
+impl PresenceOp for Vec<PresenceEntry> {
+    fn find_next_id(&self) -> u8 {
+        // O(n^2) scan algorithm
+        // should be relatively fast at low numbers anyways
+        for i in 0..255 {
+            let mut found = false;
+            for entry in self {
+                if entry.session_id == i {
+                    found = true;
+                    break;
+                }
+            }
+
+            if !found {
+                return i;
+            }
+        }
+
+        255
+    }
+}