1 files changed, 167 insertions, 0 deletions
diff --git a/src/system/gateway.rs b/src/system/gateway.rs
new file mode 100644
index 0000000..17bfe3d
--- /dev/null
+++ b/src/system/gateway.rs
@@ -0,0 +1,167 @@
+use std::sync::Arc;
+use tokio::sync::mpsc::Sender;
+use tokio::sync::Mutex;
+use twilight_gateway::{Intents, Shard, ShardId};
+use twilight_http::Client;
+use twilight_model::gateway::{
+    payload::outgoing::{update_presence::UpdatePresencePayload, UpdatePresence},
+    OpCode,
+};
+
+use super::{MemberId, MessageEvent, Status, SystemEvent, UserId};
+
+pub struct Gateway {
+    member_id: MemberId,
+    discord_token: String,
+    reference_user_id: UserId,
+    message_handler: Option<Arc<Mutex<Sender<MessageEvent>>>>,
+    system_handler: Option<Arc<Mutex<Sender<SystemEvent>>>>,
+    shard: Arc<Mutex<Shard>>,
+}
+
+impl Gateway {
+    pub fn new(
+        member_id: MemberId,
+        config: &crate::config::Member,
+        reference_user_id: UserId,
+    ) -> Self {
+        let intents = Intents::GUILD_MEMBERS
+            | Intents::GUILD_PRESENCES
+            | Intents::GUILD_MESSAGES
+            | Intents::MESSAGE_CONTENT;
+
+        Self {
+            member_id,
+            discord_token: config.discord_token.clone(),
+            reference_user_id,
+            message_handler: None,
+            system_handler: None,
+            shard: Arc::new(Mutex::new(Shard::new(
+                ShardId::ONE,
+                config.discord_token.clone(),
+                intents,
+            ))),
+        }
+    }
+
+    pub fn set_message_handler(&mut self, handler: Sender<MessageEvent>) {
+        self.message_handler = Some(Arc::new(Mutex::new(handler)));
+    }
+
+    pub fn set_system_handler(&mut self, handler: Sender<SystemEvent>) {
+        self.system_handler = Some(Arc::new(Mutex::new(handler)));
+    }
+
+    pub async fn set_status(&self, status: Status) {
+        let mut shard = self.shard.lock().await;
+
+        shard
+            .command(&UpdatePresence {
+                d: UpdatePresencePayload {
+                    activities: Vec::new(),
+                    afk: false,
+                    since: None,
+                    status,
+                },
+                op: OpCode::PresenceUpdate,
+            })
+            .await
+            .expect("Could not send command to gateway");
+    }
+
+    pub fn start_listening(&self) {
+        let message_channel = self.message_handler.clone();
+        let system_channel = self.system_handler.clone();
+        let shard = self.shard.clone();
+        let member_id = self.member_id.clone();
+        let reference_user_id = self.reference_user_id.clone();
+        let client = Client::new(self.discord_token.clone());
+
+        tokio::spawn(async move {
+            loop {
+                let next_event = { shard.lock().await.next_event().await };
+
+                match next_event {
+                    Err(source) => {
+                        if let Some(channel) = &system_channel {
+                            let channel = channel.lock().await;
+
+                            channel
+                                .send(SystemEvent::GatewayError(member_id, source.to_string()))
+                                .await;
+
+                            if source.is_fatal() {
+                                channel.send(SystemEvent::GatewayClosed(member_id)).await;
+                                break;
+                            }
+                        }
+                        todo!("Handle this")
+                    }
+                    Ok(event) => match event {
+                        twilight_gateway::Event::Ready(_) => {
+                            if let Some(channel) = &system_channel {
+                                channel
+                                    .lock()
+                                    .await
+                                    .send(SystemEvent::GatewayConnected(member_id))
+                                    .await;
+                            }
+                        }
+
+                        twilight_gateway::Event::MessageCreate(message_create) => {
+                            let message = message_create.0;
+
+                            if message.author.id != reference_user_id {
+                                continue;
+                            }
+
+                            if let Some(channel) = &message_channel {
+                                channel
+                                    .lock()
+                                    .await
+                                    .send((message.timestamp, message))
+                                    .await;
+                            }
+                        }
+
+                        twilight_gateway::Event::MessageUpdate(message_update) => {
+                            if message_update.author.is_none()
+                                || message_update.author.as_ref().unwrap().id != reference_user_id
+                            {
+                                continue;
+                            }
+
+                            if message_update.edited_timestamp.is_none() {
+                                println!("Message update but no edit timestamp");
+                                continue;
+                            }
+
+                            if message_update.content.is_none() {
+                                println!("Message update but no content");
+                                continue;
+                            }
+
+                            let message = client
+                                .message(message_update.channel_id, message_update.id)
+                                .await
+                                .expect("Could not load message")
+                                .model()
+                                .await
+                                .expect("Could not deserialize message");
+
+                            if let Some(channel) = &message_channel {
+                                channel
+                                    .lock()
+                                    .await
+                                    .send((message_update.edited_timestamp.unwrap(), message))
+                                    .await;
+                            }
+                        }
+
+                        _ => (),
+                    },
+                }
+            }
+        });
+    }
+}