Add a way to reset password

backend/src/data/db.rs

@@ -29,8 +29,8 @@ pub enum DBError {
     Sqlx(#[from] sqlx::Error),
 
     #[error(
-        "Unsupported database version: {0} (code version: {})",
-        CURRENT_DB_VERSION
+        "Unsupported database version: {0} (application version: {current})",
+        current = CURRENT_DB_VERSION
     )]
     UnsupportedVersion(u32),
 
@@ -76,6 +76,7 @@ pub enum AuthenticationResult {
 #[derive(Debug)]
 pub enum GetTokenResetPassword {
     PasswordAlreadyReset,
+    EmailUnknown,
     Ok(String),
 }
 
@@ -442,7 +443,7 @@ WHERE [id] = $1
     ) -> Result<GetTokenResetPassword> {
         let mut tx = self.tx().await?;
 
-        if let Some(db_datetime) = sqlx::query_scalar::<_, Option<DateTime<Utc>>>(
+        if let Some(db_datetime_nullable) = sqlx::query_scalar::<_, Option<DateTime<Utc>>>(
             r#"
 SELECT [password_reset_datetime]
 FROM [User]
@@ -450,12 +451,16 @@ WHERE [email] = $1
                     "#,
         )
         .bind(email)
-        .fetch_one(&mut *tx)
+        .fetch_optional(&mut *tx)
         .await?
         {
-            if Utc::now() - db_datetime <= validation_time {
-                return Ok(GetTokenResetPassword::PasswordAlreadyReset);
+            if let Some(db_datetime) = db_datetime_nullable {
+                if Utc::now() - db_datetime <= validation_time {
+                    return Ok(GetTokenResetPassword::PasswordAlreadyReset);
+                }
             }
+        } else {
+            return Ok(GetTokenResetPassword::EmailUnknown);
         }
 
         let token = generate_token();
@@ -967,6 +972,22 @@ VALUES (
         Ok(())
     }
 
+    #[tokio::test]
+    async fn ask_to_reset_password_for_unknown_email() -> Result<()> {
+        let connection = Connection::new_in_memory().await?;
+
+        let email = "paul@atreides.com";
+
+        // Ask for password reset.
+        match connection
+            .get_token_reset_password(email, Duration::hours(1))
+            .await?
+        {
+            GetTokenResetPassword::EmailUnknown => Ok(()), // Nominal case.
+            other => panic!("{:?}", other),
+        }
+    }
+
     #[tokio::test]
     async fn sign_up_then_send_validation_then_sign_out_then_ask_to_reset_password() -> Result<()> {
         let connection = Connection::new_in_memory().await?;