add utility crate

packages/backend/native-utils/crates/database/src/lib.rs

@@ -28,7 +28,7 @@ mod tests {
     use super::get_database;
 
     #[test]
-    fn can_get_mock_without_initialization() {
+    fn can_get_mock() {
-        assert!(get_database().is_ok());
+        get_database().unwrap().as_mock_connection();
     }
 }

packages/backend/native-utils/crates/util/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "util"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+chrono = "0.4.24"
+radix_fmt = "1.0.0"
+rand = "0.8.5"

packages/backend/native-utils/crates/util/src/id.rs

@@ -0,0 +1,31 @@
+use chrono::{DateTime, Utc};
+use radix_fmt::radix_36;
+
+const TIME_2000: i64 = 946_684_800_000;
+
+/// FIXME: Should we continue aid, or use other (more secure and scalable) guids
+/// such as [Cuid2](https://github.com/paralleldrive/cuid2)?
+pub fn create_aid(date: DateTime<Utc>) -> String {
+    let time = date.timestamp_millis() - TIME_2000;
+    let time = if time < 0 { 0 } else { time };
+    let num: i16 = rand::random();
+    let mut noise = format!("{:0>2}", radix_36(num).to_string());
+    let noise = noise.split_off(noise.len() - 2);
+    format!("{:0>8}{}", radix_36(time).to_string(), noise,)
+}
+
+#[cfg(test)]
+mod tests {
+    use chrono::{TimeZone, Utc};
+
+    use super::create_aid;
+
+    #[test]
+    fn generate_aid() {
+        let date = Utc.with_ymd_and_hms(2023, 5, 25, 11, 49, 37).unwrap();
+        let aid = create_aid(date);
+        assert_eq!(aid.len(), 10);
+        assert!(aid.starts_with("9f6mynag"));
+        assert_ne!(create_aid(Utc::now()), create_aid(Utc::now()));
+    }
+}

packages/backend/native-utils/crates/util/src/lib.rs

@@ -0,0 +1 @@
+pub mod id;