feat: Rewrite acks (#741)

* feat: rewrite ack system

Signed-off-by: IAmTomahawkx <iamtomahawkx@gmail.com>

* feat: rewrite acks to crond + rabbit task

* fix: review changes

---------

Signed-off-by: IAmTomahawkx <iamtomahawkx@gmail.com>

crates/core/database/src/util/acker.rs

@@ -0,0 +1,77 @@
+use redis_kiss::{get_connection, AsyncCommands};
+use revolt_permissions::{calculate_channel_permissions, ChannelPermission};
+use revolt_result::{Result, ToRevoltError};
+
+use crate::{events::client::EventV1, Channel, Database, Server, User, AMQP};
+
+pub async fn ack_channel(user: &str, channel: &str, message: &str, amqp: &AMQP) -> Result<()> {
+    let mut redis = get_connection()
+        .await
+        .map_err(|_| create_error!(InternalError))?;
+
+    let old: Option<String> = redis
+        .getset(format!("acker:{user}+{channel}"), message)
+        .await
+        .to_internal_error()?;
+
+    if old.is_none() || old.unwrap() == message {
+        amqp.process_ack(user, Some(channel), None)
+            .await
+            .to_internal_error()?;
+    }
+
+    Ok(())
+}
+
+pub async fn ack_server(user: &User, server: &Server, db: &Database, amqp: &AMQP) -> Result<()> {
+    let mut redis = get_connection()
+        .await
+        .map_err(|_| create_error!(InternalError))?;
+
+    let channels = db.fetch_channels(&server.channels).await?;
+    let query = crate::util::permissions::DatabasePermissionQuery::new(db, user).server(server);
+
+    for channel in channels {
+        let channel_id = channel.id();
+        let mut q = query.clone().channel(&channel);
+
+        if calculate_channel_permissions(&mut q)
+            .await
+            .has_channel_permission(ChannelPermission::ViewChannel)
+        {
+            let channel_last_msg = match &channel {
+                Channel::TextChannel {
+                    last_message_id, ..
+                } => last_message_id,
+                _ => unreachable!(),
+            }
+            .clone();
+
+            if let Some(channel_last_msg) = channel_last_msg {
+                let old: Option<String> = redis
+                    .getset(
+                        format!("acker:{}+{}", user.id, channel_id),
+                        &channel_last_msg,
+                    )
+                    .await
+                    .to_internal_error()?;
+
+                if old.is_none() || old.unwrap() == channel_last_msg {
+                    amqp.process_ack(&user.id, Some(channel_id), Some(&server.id))
+                        .await
+                        .to_internal_error()?;
+
+                    EventV1::ChannelAck {
+                        id: channel_id.to_string(),
+                        user: user.id.clone(),
+                        message_id: channel_last_msg,
+                    }
+                    .private(user.id.clone())
+                    .await;
+                }
+            }
+        }
+    }
+
+    Ok(())
+}