set mongodb's index to clear callback info after a day

src/db/callback_info.rs

@@ -1,6 +1,9 @@
 use crate::query_call_consume;
 use crate::CallDB;
 use bson::oid::ObjectId;
+use chrono::DateTime;
+use chrono::FixedOffset;
+use chrono::Local;
 use serde::{Deserialize, Serialize};
 
 use super::DbResult;
@@ -12,6 +15,7 @@ where
     C: Serialize,
 {
     pub _id: bson::oid::ObjectId,
+    pub created_at: DateTime<FixedOffset>,
     #[serde(flatten)]
     pub callback: C,
 }
@@ -23,6 +27,7 @@ where
     pub fn new(callback: C) -> Self {
         Self {
             _id: Default::default(),
+            created_at: Local::now().into(),
             callback,
         }
     }

src/db/mod.rs

@@ -1,5 +1,7 @@
 pub mod callback_info;
 
+use std::time::Duration;
+
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 use enum_stringify::EnumStringify;
@@ -129,6 +131,25 @@ impl DB {
                     .build(),
             )
             .await?;
+
+        // clear callbacks after a day because otherwise database will contain so much data
+        // for just button clicks
+        let callback_info = self
+            .get_database()
+            .await
+            .collection::<Event>("callback_info");
+        callback_info
+            .create_index(
+                IndexModel::builder()
+                    .keys(doc! {"created_at": 1})
+                    .options(
+                        IndexOptions::builder()
+                            .expire_after(Duration::from_secs(60 * 60 * 24 /* 1 day */))
+                            .build(),
+                    )
+                    .build(),
+            )
+            .await?;
         Ok(())
     }
 

src/main.rs

@@ -75,7 +75,7 @@ pub enum State {
 
 #[derive(Serialize, Deserialize)]
 #[serde(tag = "type")]
-#[serde(rename = "snake_case")]
+#[serde(rename_all = "snake_case")]
 pub enum Callback {
     MoreInfo,
     ProjectPage { id: u32 },
@@ -611,14 +611,14 @@ async fn make_start_buttons(db: &mut DB) -> BotResult<InlineKeyboardMarkup> {
             )]
         })
         .collect();
+    buttons.push(vec![InlineKeyboardButton::callback(
+        "More info",
+        CallbackStore::new(Callback::MoreInfo)
+            .store(db)
+            .await?
+            .get_id(),
+    )]);
     buttons.push(vec![
-        InlineKeyboardButton::callback(
-            "More info",
-            CallbackStore::new(Callback::MoreInfo)
-                .store(db)
-                .await?
-                .get_id(),
-        ),
         create_callback_button(
             "show_projects",
             CallbackStore::new(Callback::ProjectPage { id: 1 }),