ignore command (#59)

* New table `ignored_users` and queries

* Update sqlx to 0.8

* Implement `ignore` command and add needed hooks

youmubot-db-sql/src/models/ignore_list.rs

@@ -0,0 +1,60 @@
+use super::*;
+use sqlx::Executor;
+
+/// An ignored user in the ignored user list.
+#[derive(Clone, Debug)]
+pub struct IgnoredUser {
+    pub id: i64,
+    pub username: String,
+    pub ignored_since: DateTime,
+}
+
+impl IgnoredUser {
+    /// Returns a list of all ignored users.
+    pub async fn get_all<'a, E>(conn: E) -> Result<Vec<Self>>
+    where
+        E: Executor<'a, Database = Database>,
+    {
+        Ok(query_as!(
+            IgnoredUser,
+            r#"SELECT
+              id,
+              username,
+              ignored_since as "ignored_since: DateTime"
+            FROM ignored_users
+            ORDER BY id ASC"#
+        )
+        .fetch_all(conn)
+        .await?)
+    }
+
+    /// Add an user to ignore list.
+    pub async fn add<'a, E>(conn: E, user_id: i64, username: String) -> Result<Self>
+    where
+        E: Executor<'a, Database = Database>,
+    {
+        Ok(query_as!(
+            IgnoredUser,
+            r#"INSERT INTO ignored_users(id, username) VALUES (?, ?)
+               ON CONFLICT (id) DO UPDATE SET username = excluded.username
+               RETURNING id,
+              username,
+              ignored_since as "ignored_since: DateTime""#,
+            user_id,
+            username
+        )
+        .fetch_one(conn)
+        .await?)
+    }
+
+    // Remove an user from ignore list.
+    pub async fn remove<'a, E>(conn: E, user_id: i64) -> Result<()>
+    where
+        E: Executor<'a, Database = Database>,
+    {
+        query!(r#"DELETE FROM ignored_users WHERE id = ?"#, user_id)
+            .execute(conn)
+            .await?;
+        Ok(())
+    }
+}

youmubot-db-sql/src/models/mod.rs

@@ -4,5 +4,6 @@ use sqlx::{query, query_as, Executor};
 /// The DateTime used in the package.
 pub type DateTime = chrono::DateTime<chrono::Utc>;
 
+pub mod ignore_list;
 pub mod osu;
 pub mod osu_user;