From 293ea60919857a06958080274856d01dad5f01f4 Mon Sep 17 00:00:00 2001
From: Giulio De Pasquale <depasquale@giugl.io>
Date: Mon, 11 Jan 2021 17:16:17 +0000
Subject: [PATCH] using signals

---
 rustybot/src/events.rs   | 24 +++++++++++++++++++++---
 rustybot/src/strategy.rs |  4 +++-
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/rustybot/src/events.rs b/rustybot/src/events.rs
index 83cbf17..c6a0fc3 100644
--- a/rustybot/src/events.rs
+++ b/rustybot/src/events.rs
@@ -8,9 +8,9 @@ use crate::pairs::PairStatus;
 use crate::positions::{Position, PositionProfitState, PositionState};
 use crate::BoxError;
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
 pub enum SignalKind {
-    ClosePosition,
+    ClosePosition { position_id: u64 },
     OpenPosition,
 }
 
@@ -80,7 +80,7 @@ pub struct EventDispatcher {
     event_handlers: HashMap<EventKind, Vec<Box<dyn Fn(&Event, &PairStatus) -> JoinHandle<()>>>>,
     profit_state_handlers:
         HashMap<PositionProfitState, Vec<Box<dyn Fn(&Position, &PairStatus) -> JoinHandle<()>>>>,
-
+    signal_handlers: HashMap<SignalKind, Vec<Box<dyn Fn(&SignalKind) -> JoinHandle<()>>>>,
     on_any_event_handlers: Vec<Box<dyn Fn(&Event, &PairStatus) -> JoinHandle<()>>>,
     on_any_profit_state_handlers: Vec<Box<dyn Fn(&Position, &PairStatus) -> JoinHandle<()>>>,
 }
@@ -90,6 +90,7 @@ impl EventDispatcher {
         EventDispatcher {
             event_handlers: HashMap::new(),
             profit_state_handlers: HashMap::new(),
+            signal_handlers: HashMap::new(),
             on_any_event_handlers: Vec::new(),
             on_any_profit_state_handlers: Vec::new(),
         }
@@ -157,4 +158,21 @@ impl EventDispatcher {
                 .push(Box::new(move |p, s| tokio::spawn(f(&p, s)))),
         }
     }
+
+    pub fn register_signal_handler<F: 'static, Fut: 'static>(&mut self, signal: SignalKind, f: F)
+    where
+        F: Fn(&SignalKind) -> Fut,
+        Fut: Future<Output = ()> + Send,
+    {
+        match signal {
+            // PositionProfitState::Any => self
+            //     .on_any_position_state_handlers
+            //     .push(Box::new(move |p, s| tokio::spawn(f(&p, s)))),
+            _ => self
+                .signal_handlers
+                .entry(signal)
+                .or_default()
+                .push(Box::new(move |s| tokio::spawn(f(s)))),
+        }
+    }
 }
diff --git a/rustybot/src/strategy.rs b/rustybot/src/strategy.rs
index eeaab7d..af4e4c1 100644
--- a/rustybot/src/strategy.rs
+++ b/rustybot/src/strategy.rs
@@ -59,7 +59,9 @@ impl Strategy for TrailingStop {
             } else if TrailingStop::MAX_LOSS_PERC < pl_perc && pl_perc < 0.0 {
                 PositionProfitState::Loss
             } else {
-                signals.push(SignalKind::ClosePosition);
+                signals.push(SignalKind::ClosePosition {
+                    position_id: position.position_id(),
+                });
                 PositionProfitState::Critical
             }
         };