Display a different / page depending on whether the current identity is valid or not.

This is mostly a proof of concept for the implementation of form login implemented in previous commits, but it _is_ useful as it controls whether the / page shows login, or shows logout.

From here, chat is next!

1 files changed, 26 insertions, 3 deletions

diff --git a/src/login/repo/tokens.rs b/src/login/repo/tokens.rs
index e31a301..584f6dc 100644
--- a/src/login/repo/tokens.rs
+++ b/src/login/repo/tokens.rs
@@ -1,7 +1,7 @@
 use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
 use uuid::Uuid;
 
-use super::logins::Id as LoginId;
+use super::logins::{Id as LoginId, Login};
 use crate::error::BoxedError;
 
 type DateTime = chrono::DateTime<chrono::Utc>;
@@ -45,18 +45,41 @@ impl<'c> Tokens<'c> {
         Ok(secret)
     }
 
-    pub async fn revoke(&mut self, token: &str) -> Result<(), BoxedError> {
+    /// Revoke a token by its secret. If there is no such token with that
+    /// secret, this will succeed by doing nothing.
+    pub async fn revoke(&mut self, secret: &str) -> Result<(), BoxedError> {
         sqlx::query!(
             r#"
                 delete
                 from token
                 where secret = $1
             "#,
-            token,
+            secret,
         )
         .execute(&mut *self.0)
         .await?;
 
         Ok(())
     }
+
+    /// Validate a token by its secret, retrieving the associated Login record.
+    /// Will return [None] if the token is not valid.
+    pub async fn validate(&mut self, secret: &str) -> Result<Option<Login>, BoxedError> {
+        let login = sqlx::query_as!(
+            Login,
+            r#"
+                select
+                    login.id as "id: LoginId",
+                    name
+                from login
+                join token on login.id = token.login
+                where token.secret = $1
+            "#,
+            secret,
+        )
+        .fetch_optional(&mut *self.0)
+        .await?;
+
+        Ok(login)
+    }
 }