Add custom raw event handler with callbacks

Signed-off-by: trivernis <trivernis@protonmail.com>

Cargo.lock

@@ -1033,7 +1033,7 @@ dependencies = [
 
 [[package]]
 name = "serenity-rich-interaction"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "futures",
  "log",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "serenity-rich-interaction"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 description = "Menus and self deleting messages for the serenity discord framework"

src/events/event_callbacks.rs

@@ -1,6 +1,6 @@
 use crate::core::MessageHandle;
-use crate::menu::{EventDrivenMessageContainer, EventDrivenMessagesRef, MessageRef};
+use crate::menu::{get_listeners_from_context, MessageRef};
-use crate::{Error, Result};
+use crate::Result;
 use serenity::client::Context;
 use serenity::model::channel::Reaction;
 use serenity::model::id::{ChannelId, MessageId};
@@ -10,7 +10,7 @@ use tokio::time::Duration;
 static UPDATE_INTERVAL_SECS: u64 = 5;
 
 /// Starts the loop to handle message updates
-pub async fn start_update_loop(ctx: &Context) {
+pub async fn start_update_loop(ctx: &Context) -> Result<()> {
     let event_messages = get_listeners_from_context(ctx)
         .await
         .expect("Failed to get event message container");
@@ -51,6 +51,8 @@ pub async fn start_update_loop(ctx: &Context) {
             tokio::time::sleep(Duration::from_secs(UPDATE_INTERVAL_SECS)).await;
         }
     });
+
+    Ok(())
 }
 
 /// To be fired from the serenity handler when a message was deleted
@@ -158,12 +160,3 @@ pub async fn handle_reaction_remove(ctx: &Context, reaction: &Reaction) -> Resul
 
     Ok(())
 }
-
-pub async fn get_listeners_from_context(ctx: &Context) -> Result<EventDrivenMessagesRef> {
-    let data = ctx.data.read().await;
-    let listeners = data
-        .get::<EventDrivenMessageContainer>()
-        .ok_or(Error::Uninitialized)?;
-    log::trace!("Returning listener");
-    Ok(listeners.clone())
-}

src/events/handler.rs

@@ -0,0 +1,153 @@
+use crate::events::event_callbacks;
+use crate::Result;
+use serenity::async_trait;
+use serenity::client::{Context, RawEventHandler};
+use serenity::model::event;
+use serenity::model::event::Event;
+use std::any::{Any, TypeId};
+use std::collections::HashMap;
+use std::future::Future;
+use std::pin::Pin;
+use std::sync::Arc;
+
+pub struct EventCallback<T> {
+    inner: Arc<
+        dyn for<'a> Fn(
+                &'a Context,
+                &'a T,
+            ) -> Pin<Box<(dyn Future<Output = Result<()>> + Send + 'a)>>
+            + Send
+            + Sync,
+    >,
+}
+
+impl<T> EventCallback<T> {
+    pub async fn run(&self, ctx: &Context, arg: &T) -> Result<()> {
+        self.inner.clone()(ctx, arg).await?;
+        Ok(())
+    }
+}
+
+/// A handler for raw serenity events
+pub struct RichEventHandler {
+    callbacks: HashMap<TypeId, Vec<Box<dyn Any + Send + Sync>>>,
+}
+
+impl RichEventHandler {
+    /// Handles a generic event
+    async fn handle_event<T: 'static>(&self, ctx: &Context, value: T) {
+        if let Some(callbacks) = self.callbacks.get(&TypeId::of::<T>()) {
+            for callback in callbacks {
+                if let Some(cb) = callback.downcast_ref::<EventCallback<T>>() {
+                    if let Err(e) = cb.run(ctx, &value).await {
+                        log::error!("Error in event callback: {:?}", e);
+                    }
+                }
+            }
+        }
+    }
+
+    pub fn add_event<T: 'static, F: 'static>(&mut self, cb: F) -> &mut Self
+    where
+        F: for<'a> Fn(
+                &'a Context,
+                &'a T,
+            ) -> Pin<Box<(dyn Future<Output = Result<()>> + Send + 'a)>>
+            + Send
+            + Sync,
+    {
+        let type_id = TypeId::of::<T>();
+        let callbacks = if let Some(cbs) = self.callbacks.get_mut(&type_id) {
+            cbs
+        } else {
+            self.callbacks.insert(type_id, Vec::new());
+            self.callbacks.get_mut(&type_id).unwrap()
+        };
+        callbacks.push(Box::new(EventCallback {
+            inner: Arc::new(cb),
+        }));
+
+        self
+    }
+}
+
+impl Default for RichEventHandler {
+    fn default() -> Self {
+        let mut handler = Self {
+            callbacks: Default::default(),
+        };
+        handler
+            .add_event(|ctx, _: &event::ReadyEvent| {
+                Box::pin(event_callbacks::start_update_loop(ctx))
+            })
+            .add_event(|ctx, e: &event::ReactionAddEvent| {
+                Box::pin(event_callbacks::handle_reaction_add(ctx, &e.reaction))
+            })
+            .add_event(|ctx, e: &event::ReactionRemoveEvent| {
+                Box::pin(event_callbacks::handle_reaction_remove(ctx, &e.reaction))
+            })
+            .add_event(|ctx, e: &event::MessageDeleteEvent| {
+                Box::pin(event_callbacks::handle_message_delete(
+                    ctx,
+                    e.channel_id,
+                    e.message_id,
+                ))
+            })
+            .add_event(|ctx, e: &event::MessageDeleteBulkEvent| {
+                Box::pin(event_callbacks::handle_message_delete_bulk(
+                    ctx,
+                    e.channel_id,
+                    &e.ids,
+                ))
+            });
+
+        handler
+    }
+}
+
+#[async_trait]
+impl RawEventHandler for RichEventHandler {
+    async fn raw_event(&self, ctx: Context, event: Event) {
+        match event {
+            Event::ChannelCreate(e) => self.handle_event(&ctx, e).await,
+            Event::ChannelDelete(e) => self.handle_event(&ctx, e).await,
+            Event::ChannelPinsUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::ChannelUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildBanAdd(e) => self.handle_event(&ctx, e).await,
+            Event::GuildBanRemove(e) => self.handle_event(&ctx, e).await,
+            Event::GuildCreate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildDelete(e) => self.handle_event(&ctx, e).await,
+            Event::GuildEmojisUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildIntegrationsUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildMemberAdd(e) => self.handle_event(&ctx, e).await,
+            Event::GuildMemberRemove(e) => self.handle_event(&ctx, e).await,
+            Event::GuildMemberUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildMembersChunk(e) => self.handle_event(&ctx, e).await,
+            Event::GuildRoleCreate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildRoleDelete(e) => self.handle_event(&ctx, e).await,
+            Event::GuildRoleUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::GuildUnavailable(e) => self.handle_event(&ctx, e).await,
+            Event::GuildUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::InviteCreate(e) => self.handle_event(&ctx, e).await,
+            Event::InviteDelete(e) => self.handle_event(&ctx, e).await,
+            Event::MessageCreate(e) => self.handle_event(&ctx, e).await,
+            Event::MessageDelete(e) => self.handle_event(&ctx, e).await,
+            Event::MessageDeleteBulk(e) => self.handle_event(&ctx, e).await,
+            Event::MessageUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::PresenceUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::PresencesReplace(e) => self.handle_event(&ctx, e).await,
+            Event::ReactionAdd(e) => self.handle_event(&ctx, e).await,
+            Event::ReactionRemove(e) => self.handle_event(&ctx, e).await,
+            Event::ReactionRemoveAll(e) => self.handle_event(&ctx, e).await,
+            Event::Ready(e) => self.handle_event(&ctx, e).await,
+            Event::Resumed(e) => self.handle_event(&ctx, e).await,
+            Event::TypingStart(e) => self.handle_event(&ctx, e).await,
+            Event::UserUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::VoiceStateUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::VoiceServerUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::WebhookUpdate(e) => self.handle_event(&ctx, e).await,
+            Event::Unknown(e) => self.handle_event(&ctx, e).await,
+            _ => {}
+        }
+    }
+}

src/events/mod.rs

@@ -0,0 +1,3 @@
+pub mod event_callbacks;
+mod handler;
+pub use handler::*;

src/lib.rs

@@ -1,7 +1,7 @@
 pub mod core;
 pub mod ephemeral_message;
 mod error;
-pub mod event_handlers;
+pub mod events;
 pub mod menu;
 
 pub static VERSION: &str = env!("CARGO_PKG_VERSION");

src/menu/container.rs

@@ -1,4 +1,7 @@
 use crate::core::{BoxedEventDrivenMessage, MessageHandle};
+use crate::Error;
+use crate::Result;
+use serenity::client::Context;
 use serenity::prelude::TypeMapKey;
 use std::collections::HashMap;
 use std::sync::Arc;
@@ -12,3 +15,12 @@ pub type EventDrivenMessagesRef = Arc<Mutex<HashMap<MessageHandle, MessageRef>>>
 impl TypeMapKey for EventDrivenMessageContainer {
     type Value = EventDrivenMessagesRef;
 }
+
+pub async fn get_listeners_from_context(ctx: &Context) -> Result<EventDrivenMessagesRef> {
+    let data = ctx.data.read().await;
+    let listeners = data
+        .get::<EventDrivenMessageContainer>()
+        .ok_or(Error::Uninitialized)?;
+    log::trace!("Returning listener");
+    Ok(listeners.clone())
+}

src/menu/controls.rs

@@ -1,8 +1,7 @@
 use crate::error::{Error, Result};
-use crate::event_handlers::get_listeners_from_context;
 use crate::menu::menu::Menu;
 use crate::menu::typedata::HelpActiveContainer;
-use crate::menu::ActionContainer;
+use crate::menu::{get_listeners_from_context, ActionContainer};
 use serde_json::json;
 use serde_json::Value;
 use serenity::client::Context;

src/menu/menu.rs

@@ -1,10 +1,9 @@
 use crate::core::MessageHandle;
 use crate::error::{Error, Result};
-use crate::event_handlers::get_listeners_from_context;
 use crate::menu::controls::{close_menu, next_page, previous_page, toggle_help};
 use crate::menu::traits::EventDrivenMessage;
 use crate::menu::typedata::HelpActiveContainer;
-use crate::menu::{EventDrivenMessagesRef, Page};
+use crate::menu::{get_listeners_from_context, EventDrivenMessagesRef, Page};
 use futures::FutureExt;
 use serenity::async_trait;
 use serenity::client::Context;