✨ Add simple way of handling inputs through CBs

1 files changed, 57 insertions, 0 deletions

diff --git a/racer-tracer/src/key_inputs.rs b/racer-tracer/src/key_inputs.rs
new file mode 100644
index 0000000..06e0f99
--- /dev/null
+++ b/racer-tracer/src/key_inputs.rs
@@ -0,0 +1,57 @@
+use std::collections::HashMap;
+
+use minifb::{Key, Window};
+
+use crate::error::TracerError;
+
+pub type KeyClosure<'a> = &'a (dyn Fn(f64) -> Result<(), TracerError> + Send + Sync);
+
+pub struct KeyInputs<'a> {
+    is_down_callbacks: HashMap<Key, Vec<KeyClosure<'a>>>,
+    is_released_callbacks: HashMap<Key, Vec<KeyClosure<'a>>>,
+}
+
+impl<'a> KeyInputs<'a> {
+    pub fn new() -> Self {
+        KeyInputs {
+            is_down_callbacks: HashMap::new(),
+            is_released_callbacks: HashMap::new(),
+        }
+    }
+
+    pub fn release(&mut self, key: Key, closure: KeyClosure<'a>) {
+        let callbacks = self
+            .is_released_callbacks
+            .entry(key)
+            .or_insert_with(Vec::new);
+        callbacks.push(closure);
+    }
+
+    pub fn down(&mut self, key: Key, closure: KeyClosure<'a>) {
+        let callbacks = self.is_down_callbacks.entry(key).or_insert_with(Vec::new);
+        callbacks.push(closure);
+    }
+
+    pub fn update(&mut self, window: &Window, dt: f64) {
+        self.is_down_callbacks
+            .iter_mut()
+            .filter(|(key, _callbacks)| window.is_key_down(**key))
+            .for_each(|(_key, callbacks)| {
+                callbacks.iter_mut().for_each(|callback| {
+                    if let Err(e) = callback(dt) {
+                        println!("Key callback error: {}", e)
+                    }
+                })
+            });
+        self.is_released_callbacks
+            .iter_mut()
+            .filter(|(key, _callbacks)| window.is_key_released(**key))
+            .for_each(|(_key, callbacks)| {
+                callbacks.iter_mut().for_each(|callback| {
+                    if let Err(e) = callback(dt) {
+                        println!("Key callback error: {}", e)
+                    }
+                })
+            });
+    }
+}