id: added id create for handling ID needs

crates/id/src/lib.rs

@@ -0,0 +1,12 @@
+mod user;
+
+// error
+#[derive(thiserror::Error)]
+// the rest
+#[derive(Debug)]
+pub enum Error {
+    #[error("Invalid {0} ID")]
+    Invalid(&'static str),
+}
+
+pub use user::UserID;

crates/id/src/user.rs

@@ -0,0 +1,63 @@
+use super::Error;
+use nanoid::nanoid;
+use nanoid_dictionary::NOLOOKALIKES;
+use std::fmt::{Display, Formatter};
+use std::str::FromStr;
+
+const LENGTH: usize = 15;
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct UserID(pub String);
+
+impl Display for UserID {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl Default for UserID {
+    fn default() -> Self {
+        Self(nanoid!(LENGTH, NOLOOKALIKES))
+    }
+}
+
+impl FromStr for UserID {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.len() == LENGTH && s.chars().all(|c| NOLOOKALIKES.contains(&c)) {
+            Ok(Self(s.to_string()))
+        } else {
+            Err(Error::Invalid("User"))
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{UserID, LENGTH};
+    use std::str::FromStr;
+
+    #[test]
+    fn invalid_length() {
+        assert!(UserID::from_str("test").is_err());
+    }
+
+    #[test]
+    fn invalid_characters() {
+        let value = "11lI0Oouv5Ss2ZZ";
+        assert_eq!(value.len(), LENGTH);
+
+        assert!(UserID::from_str(value).is_err());
+    }
+
+    #[test]
+    fn valid() {
+        let value = "nqWxagcdTGGXUgn";
+        let id = UserID::from_str(value);
+        assert!(id.is_ok());
+
+        let id = id.unwrap();
+        assert_eq!(id.0, value);
+    }
+}