Add tool to remove embeds for clocktower.live links

.envrc

@@ -1,4 +1,4 @@
 use flake
 
-export DISCORD_TOKEN_FILE=./token-prod
-export DB_FILE=db-prod.sqlite
+export DISCORD_TOKEN_FILE=./token
+export DB_FILE=db.sqlite

src/main.rs

@@ -1,6 +1,6 @@
 use std::{io, path::Path};
 
-use ::serenity::all::{ChannelId, GuildId, Mentionable, UserId};
+use ::serenity::all::{ChannelId, EditMessage, GuildId, Mentionable, UserId};
 use eyre::{Context as _, Error, OptionExt, Result};
 use futures::{FutureExt, StreamExt, TryStreamExt};
 use poise::serenity_prelude as serenity;
@@ -391,15 +391,42 @@ async fn register_commands(
     Ok(())
 }
 
+#[tracing::instrument(skip(ctx))]
+async fn handle_message(
+    ctx: impl AsRef<serenity::Http>,
+    message: &serenity::Message,
+) -> Result<()> {
+    for embed in &message.embeds {
+        if embed
+            .url
+            .as_ref()
+            .is_some_and(|url| url.contains("https://clocktower.live"))
+        {
+            let mut message = message.clone();
+            message
+                .edit(&ctx.as_ref(), EditMessage::new().suppress_embeds(true))
+                .await?;
+        }
+    }
+    Ok(())
+}
+
 async fn on_event(
     ctx: &serenity::Context,
     event: &serenity::FullEvent,
     framework: poise::FrameworkContext<'_, Data, Error>,
     _: &Data,
 ) -> Result<()> {
-    if let serenity::FullEvent::GuildCreate { guild, is_new: _ } = event {
-        register_commands(ctx, framework.options, guild.id).await?;
-    };
+    match event {
+        serenity::FullEvent::GuildCreate { guild, is_new: _ } => {
+            register_commands(ctx, framework.options, guild.id).await?
+        }
+        serenity::FullEvent::Message { new_message: msg }
+        | serenity::FullEvent::MessageUpdate { new: Some(msg), .. } => {
+            handle_message(ctx, msg).await?
+        }
+        _ => {}
+    }
     Ok(())
 }
 
@@ -423,8 +450,10 @@ async fn main() -> Result<()> {
     )
     .wrap_err("A Discord token is required")?;
     let dbfile = std::env::var_os("DB_FILE").ok_or_eyre("A database file is required")?;
-    let intents =
-        serenity::GatewayIntents::non_privileged() | serenity::GatewayIntents::GUILD_MEMBERS;
+    let intents = serenity::GatewayIntents::non_privileged()
+        | serenity::GatewayIntents::GUILD_MEMBERS
+        | serenity::GatewayIntents::GUILD_MESSAGES
+        | serenity::GatewayIntents::MESSAGE_CONTENT;
 
     let framework = poise::Framework::builder()
         .options(poise::FrameworkOptions {