refactor: create presence crate and add tests

crates/core/presence/src/operations.rs

@@ -0,0 +1,42 @@
+use redis_kiss::{AsyncCommands, Conn};
+
+/// Add to set (string)
+pub async fn __add_to_set_string(conn: &mut Conn, key: &str, value: &str) {
+    let _: Option<()> = conn.sadd(key, value).await.ok();
+}
+
+/// Add to set (u32)
+pub async fn __add_to_set_u32(conn: &mut Conn, key: &str, value: u32) {
+    let _: Option<()> = conn.sadd(key, value).await.ok();
+}
+
+/// Remove from set (string)
+pub async fn __remove_from_set_string(conn: &mut Conn, key: &str, value: &str) {
+    let _: Option<()> = conn.srem(key, value).await.ok();
+}
+
+/// Remove from set (u32)
+pub async fn __remove_from_set_u32(conn: &mut Conn, key: &str, value: u32) {
+    let _: Option<()> = conn.srem(key, value).await.ok();
+}
+
+/// Get set members as string
+pub async fn __get_set_members_as_string(conn: &mut Conn, key: &str) -> Vec<String> {
+    conn.smembers::<_, Vec<String>>(key)
+        .await
+        .expect("could not get set members as string")
+}
+
+/// Get set size
+pub async fn __get_set_size(conn: &mut Conn, id: &str) -> u32 {
+    conn.scard::<_, u32>(id)
+        .await
+        .expect("could not get set size")
+}
+
+/// Delete key by id
+pub async fn __delete_key(conn: &mut Conn, id: &str) {
+    conn.del::<_, ()>(id)
+        .await
+        .expect("could not delete key by id");
+}