feat: add admin channel wipe endpoint

crates/core/database/src/events/client.rs

@@ -282,6 +282,16 @@ pub enum EventV1 {
         id: String,
     },
 
+    /// Channel wiped
+    ///
+    /// Clients should remove all associated data:
+    /// - Messages
+    /// - Unreads
+    /// - Voice States
+    ChannelWipe {
+        id: String,
+    },
+
     /// User joins a group
     ChannelGroupJoin {
         id: String,

crates/core/database/src/models/channels/model.rs

@@ -762,6 +762,13 @@ impl Channel {
         // - channels list / categories list on server
         db.delete_channel(self).await
     }
+    
+    /// Wipe a channel's messages
+    pub async fn wipe(&self, db: &Database) -> Result<()> {
+        let id = self.id().to_string();
+        EventV1::ChannelWipe { id: id.clone() }.p(id).await;
+        db.wipe_channel(self).await
+    }
 }
 
 #[cfg(feature = "mongodb")]

crates/core/database/src/models/channels/ops.rs

@@ -1,3 +1,4 @@
+use bson::{doc, Bson};
 use crate::{revolt_result::Result, Channel, FieldsChannel, PartialChannel};
 use revolt_permissions::OverrideField;
 
@@ -48,5 +49,6 @@ pub trait AbstractChannels: Sync + Send {
     async fn remove_user_from_group(&self, channel_id: &str, user_id: &str) -> Result<()>;
 
     // Delete a channel
-    async fn delete_channel(&self, channel_id: &Channel) -> Result<()>;
+    async fn delete_channel(&self, channel_id: &Channel) -> Result<()>; // Wipe a channel's messages
+    async fn wipe_channel(&self, channel: &Channel) -> Result<()>;
 }

crates/core/database/src/models/channels/ops/mongodb.rs

@@ -261,6 +261,23 @@ impl AbstractChannels for MongoDb {
         // Delete the channel itself
         query!(self, delete_one_by_id, COL, channel.id()).map(|_| ())
     }
+
+    // Wipe a channel's messages
+    async fn wipe_channel(&self, channel: &Channel) -> Result<()> {
+        let id = channel.id().to_string();
+
+        // Delete invites and unreads.
+        self.delete_associated_channel_objects(Bson::String(id.to_string()))
+            .await?;
+
+        // Delete messages.
+        self.delete_bulk_messages(doc! {
+            "channel": &id
+        })
+        .await?;
+
+        Ok(())
+    }
 }
 
 impl MongoDb {

crates/core/database/src/models/channels/ops/reference.rs

@@ -151,4 +151,10 @@ impl AbstractChannels for ReferenceDb {
             Err(create_error!(NotFound))
         }
     }
+
+    async fn wipe_channel(&self, channel: &Channel) -> Result<()> {
+        let mut messages = self.messages.lock().await;
+        messages.retain(|_, message| message.channel != channel.id());
+        Ok(())
+    }
 }