remove reactions from messages older than n days

src/handlers/event/block_reaction.rs

@@ -0,0 +1,39 @@
+use crate::Data;
+
+use chrono::Duration;
+use eyre::{Context as _, Result};
+use log::{debug, trace};
+use poise::serenity_prelude::{Context, Reaction, Timestamp};
+
+pub async fn handle(ctx: &Context, reaction: &Reaction, data: &Data) -> Result<()> {
+	let reaction_type = reaction.emoji.clone();
+	let reactor = reaction.user_id;
+	let message = reaction.message(ctx).await.wrap_err_with(|| {
+		format!(
+			"Couldn't get message {} from reaction! We won't be able to check if it's old",
+			reaction.message_id
+		)
+	})?;
+
+	let time_sent = message.timestamp.to_utc();
+	let age = Timestamp::now().signed_duration_since(time_sent);
+	let max_days = Duration::days(data.config.discord.days_to_delete_reaction);
+
+	if age >= max_days {
+		// NOTE: if we for some reason **didn't** get the user_id associated with the reaction,
+		// this will clear **all** reactions of this type. this is intentional as older reactions
+		// being removed > harmful reactions being kept
+		debug!(
+			"Removing reaction {reaction_type} from message {}",
+			message.id
+		);
+		message.delete_reaction(ctx, reactor, reaction_type).await?;
+	} else {
+		trace!(
+			"Keeping reaction {reaction_type} for message {}",
+			message.id
+		);
+	}
+
+	Ok(())
+}

src/handlers/event/mod.rs

@@ -5,6 +5,7 @@ use poise::serenity_prelude::{ActivityData, Context, FullEvent, OnlineStatus};
 use poise::FrameworkContext;
 
 mod analyze_logs;
+mod block_reaction;
 mod delete_on_reaction;
 mod eta;
 mod expand_link;
@@ -71,6 +72,8 @@ pub async fn handle(
 				add_reaction.message_id.to_string(),
 				add_reaction.user_id.unwrap_or_default().to_string()
 			);
+
+			block_reaction::handle(ctx, add_reaction, data).await?;
 			delete_on_reaction::handle(ctx, add_reaction).await?;
 		}