username: type to parse username

crates/ezidam/src/routes/settings/personal.rs

@@ -63,8 +63,20 @@ pub async fn user_settings_personal_form(
     }
 
     // Update username
-    if user.username() != form.username {
-        if let Err(e) = user.set_username(&mut transaction, form.username).await {
+    if user.username().0 != form.username {
+        // Parse username
+        let username = match Username::from_str(form.username) {
+            Ok(username) => username,
+            Err(_) => {
+                return Ok(Flash::new(
+                    Redirect::to(uri!(user_settings_personal)),
+                    FlashKind::Danger,
+                    INVALID_USERNAME_ERROR,
+                ));
+            }
+        };
+
+        if let Err(e) = user.set_username(&mut transaction, &username).await {
             return Ok(Flash::new(
                 Redirect::to(uri!(user_settings_personal)),
                 FlashKind::Danger,

crates/ezidam/src/routes/setup.rs

@@ -1,6 +1,7 @@
 use super::prelude::*;
 use apps::App;
 use hash::{Secret, SecretString};
+use id::INVALID_USERNAME_ERROR;
 use rocket::{get, post};
 use settings::Settings;
 use std::str::FromStr;
@@ -38,6 +39,18 @@ async fn create_first_account(
 ) -> Result<Either<Redirect, Flash<Redirect>>> {
     let form = form.into_inner();
 
+    // Parse username
+    let username = match Username::from_str(form.username) {
+        Ok(username) => username,
+        Err(_) => {
+            return Ok(Either::Right(Flash::new(
+                Redirect::to(uri!(setup)),
+                FlashKind::Danger,
+                INVALID_USERNAME_ERROR,
+            )));
+        }
+    };
+
     // Parse url
     let url = match Url::parse(form.url) {
         Ok(url) => url,
@@ -82,14 +95,7 @@ async fn create_first_account(
     .await?;
 
     // Insert user in database
-    User::insert(
-        &mut transaction,
-        &user_id,
-        true,
-        form.username,
-        Some(&password),
-    )
-    .await?;
+    User::insert(&mut transaction, &user_id, true, &username, Some(&password)).await?;
 
     // Store UserID in settings
     Settings::set_first_admin(&mut transaction, &user_id).await?;

crates/id/src/lib.rs

@@ -1,6 +1,7 @@
 mod app;
 mod key;
 mod user;
+mod username;
 
 // error
 #[derive(thiserror::Error)]
@@ -14,3 +15,5 @@ pub enum Error {
 pub use app::AppID;
 pub use key::KeyID;
 pub use user::UserID;
+pub use username::Username;
+pub use username::INVALID_USERNAME_ERROR;

crates/id/src/username.rs

@@ -0,0 +1,63 @@
+use super::Error;
+use nanoid_dictionary::ALPHANUMERIC;
+use serde::{Deserialize, Serialize};
+use std::fmt::{Display, Formatter};
+use std::str::FromStr;
+
+pub const INVALID_USERNAME_ERROR: &str = "Invalid username. Pattern is [a-zA-Z0-9]";
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+pub struct Username(pub String);
+
+impl Display for Username {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl AsRef<str> for Username {
+    fn as_ref(&self) -> &str {
+        self.0.as_ref()
+    }
+}
+
+impl From<&Username> for String {
+    fn from(value: &Username) -> Self {
+        value.to_string()
+    }
+}
+
+impl FromStr for Username {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.chars().all(|c| ALPHANUMERIC.contains(&c)) {
+            Ok(Self(s.to_string()))
+        } else {
+            Err(Error::Invalid("Username"))
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Username;
+    use std::str::FromStr;
+
+    #[test]
+    fn invalid_characters() {
+        let value = "#!👎 INVALID 🚫!#";
+
+        assert!(Username::from_str(value).is_err());
+    }
+
+    #[test]
+    fn valid_username() {
+        let value = "philt3r";
+        let id = Username::from_str(value);
+        assert!(id.is_ok());
+
+        let id = id.unwrap();
+        assert_eq!(id.0, value);
+    }
+}

crates/users/src/database.rs

@@ -6,7 +6,7 @@ use database::Error as DatabaseError;
 use database::Users as DatabaseUsers;
 use email_address::EmailAddress;
 use hash::{PaperKey, Password, Secret};
-use id::UserID;
+use id::{UserID, Username};
 use std::str::FromStr;
 
 impl From<DatabaseUsers> for User {
@@ -16,7 +16,7 @@ impl From<DatabaseUsers> for User {
             created_at: db.created_at,
             updated_at: db.updated_at,
             is_admin: db.is_admin,
-            username: db.username,
+            username: Username(db.username),
             name: db.name,
             email: db.email,
             password: db.password,
@@ -41,13 +41,17 @@ impl User {
         conn: impl SqliteExecutor<'_>,
         id: &UserID,
         is_admin: bool,
-        username: &str,
+        username: &Username,
         password: Option<&Password>,
     ) -> Result<Option<()>, Error> {
-        Ok(
-            DatabaseUsers::insert(conn, &id.0, is_admin, username, password.map(|p| p.hash()))
-                .await?,
+        Ok(DatabaseUsers::insert(
+            conn,
+            &id.0,
+            is_admin,
+            username.as_ref(),
+            password.map(|p| p.hash()),
         )
+        .await?)
     }
 
     pub async fn get_by_id(
@@ -70,9 +74,9 @@ impl User {
 
     async fn get_by_username(
         conn: impl SqliteExecutor<'_>,
-        username: &str,
+        username: &Username,
     ) -> Result<Option<Self>, Error> {
-        Ok(DatabaseUsers::get_one_by_username(conn, username)
+        Ok(DatabaseUsers::get_one_by_username(conn, username.as_ref())
             .await?
             .map(Self::from))
     }
@@ -93,7 +97,11 @@ impl User {
         }
 
         // Get user from username
-        Self::get_by_username(conn, login).await
+        if let Ok(username) = Username::from_str(login) {
+            return Self::get_by_username(conn, &username).await;
+        }
+
+        Err(Error::InvalidLogin(login.into()))
     }
 
     pub async fn get_one_from_authorization_code(
@@ -136,9 +144,9 @@ impl User {
     pub async fn set_username(
         &self,
         conn: impl SqliteExecutor<'_>,
-        username: &str,
+        username: &Username,
     ) -> Result<(), Error> {
-        DatabaseUsers::set_username(conn, self.id.as_ref(), username)
+        DatabaseUsers::set_username(conn, self.id.as_ref(), username.as_ref())
             .await
             .map_err(|e| match e {
                 DatabaseError::UniqueConstraint(column) => {

crates/users/src/error.rs

@@ -14,4 +14,7 @@ pub enum Error {
 
     #[error("The email \"{0}\" is linked to another user.")]
     EmailNotAvailable(String),
+
+    #[error("The login \"{0}\" is not valid.")]
+    InvalidLogin(String),
 }

crates/users/src/lib.rs

@@ -4,7 +4,7 @@ pub mod password_reset;
 pub mod totp_login_request;
 
 use chrono::{DateTime, Utc};
-use id::UserID;
+use id::{UserID, Username};
 use serde::Serialize;
 
 pub use crate::error::Error;
@@ -16,7 +16,7 @@ pub struct User {
     created_at: DateTime<Utc>,
     updated_at: DateTime<Utc>,
     is_admin: bool,
-    username: String,
+    username: Username,
     name: Option<String>,
     email: Option<String>,
     password: Option<String>,
@@ -38,7 +38,7 @@ impl User {
     pub fn password_hashed(&self) -> Option<&str> {
         self.password.as_deref()
     }
-    pub fn username(&self) -> &str {
+    pub fn username(&self) -> &Username {
         &self.username
     }
     pub fn name(&self) -> Option<&str> {