Change reminder sending behaviour to keep reminders but flag them as sent

src/models/reminder/mod.rs

@@ -159,6 +159,7 @@ LEFT JOIN
 ON
     reminders.set_by = users.id
 WHERE
+    `status` = 'pending' AND
     channels.channel = ? AND
     FIND_IN_SET(reminders.enabled, ?)
 ORDER BY
@@ -217,6 +218,7 @@ LEFT JOIN
 ON
     reminders.set_by = users.id
 WHERE
+    `status` = 'pending' AND
     FIND_IN_SET(channels.channel, ?)
                 ",
                     channels
@@ -251,6 +253,7 @@ LEFT JOIN
 ON
     reminders.set_by = users.id
 WHERE
+    `status` = 'pending' AND
     channels.guild_id = (SELECT id FROM guilds WHERE guild = ?)
                 ",
                     guild_id.as_u64()
@@ -286,6 +289,7 @@ LEFT JOIN
 ON
     reminders.set_by = users.id
 WHERE
+    `status` = 'pending' AND
     channels.id = (SELECT dm_channel FROM users WHERE user = ?)
             ",
                 user.as_u64()
@@ -300,7 +304,10 @@ WHERE
         &self,
         db: impl Executor<'_, Database = Database>,
     ) -> Result<(), sqlx::Error> {
-        sqlx::query!("DELETE FROM reminders WHERE uid = ?", self.uid).execute(db).await.map(|_| ())
+        sqlx::query!("UPDATE reminders SET `status` = 'deleted' WHERE uid = ?", self.uid)
+            .execute(db)
+            .await
+            .map(|_| ())
     }
 
     pub fn display_content(&self) -> &str {