From 7851fdae1e6569711207c1ab1b03c88ba6db5cb3 Mon Sep 17 00:00:00 2001
From: Philippe Loctaux <p@philippeloctaux.com>
Date: Sun, 5 Mar 2023 23:27:34 +0100
Subject: [PATCH] id: added id create for handling ID needs

---
 crates/id/Cargo.toml  |  9 +++++++
 crates/id/src/lib.rs  | 12 +++++++++
 crates/id/src/user.rs | 63 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 crates/id/Cargo.toml
 create mode 100644 crates/id/src/lib.rs
 create mode 100644 crates/id/src/user.rs

diff --git a/crates/id/Cargo.toml b/crates/id/Cargo.toml
new file mode 100644
index 0000000..8975ca9
--- /dev/null
+++ b/crates/id/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "id"
+version = "0.0.0"
+edition = "2021"
+
+[dependencies]
+thiserror = { workspace = true }
+nanoid = "0.4.0"
+nanoid-dictionary = "0.4.3"
diff --git a/crates/id/src/lib.rs b/crates/id/src/lib.rs
new file mode 100644
index 0000000..46e215d
--- /dev/null
+++ b/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;
diff --git a/crates/id/src/user.rs b/crates/id/src/user.rs
new file mode 100644
index 0000000..5a3c69f
--- /dev/null
+++ b/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);
+    }
+}