3 files changed, 37 insertions, 0 deletions
diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/Controlled.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/Controlled.kt
new file mode 100644
index 0000000..8c54bfe
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/Controlled.kt
@@ -0,0 +1,7 @@
+package coffee.liz.ecs.input
+
+import coffee.liz.ecs.Component
+
+interface Controlled: Component {
+    fun handleInput(inputState: InputState)
+}
+\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputProvider.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputProvider.kt
new file mode 100644
index 0000000..5735665
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputProvider.kt
@@ -0,0 +1,7 @@
+package coffee.liz.ecs.input
+
+data class InputState(val activeInputs: Set<String>)
+
+interface InputProvider {
+    val inputState: InputState
+}
+\ No newline at end of file
diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputSystem.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputSystem.kt
new file mode 100644
index 0000000..6dc8256
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/input/InputSystem.kt
@@ -0,0 +1,23 @@
+package coffee.liz.ecs.input
+
+import coffee.liz.ecs.System
+import coffee.liz.ecs.TickedSystem
+import coffee.liz.ecs.World
+import kotlin.time.Duration
+
+class InputSystem<Outside : InputProvider>(
+    pollRate: Duration
+) : TickedSystem<Outside>(pollRate) {
+    private val activeInputs = mutableMapOf<String, Int>()
+
+    override fun update(world: World<Outside>, state: Outside, ticks: Int) {
+        state.inputState.activeInputs.forEach {
+            activeInputs[it] = (activeInputs[it] ?: 0) + ticks
+        }
+        activeInputs.keys.retainAll(state.inputState.activeInputs)
+
+        world.query(Controlled::class).forEach {
+            it.get(Controlled::class).handleInput(activeInputs.toMap())
+        }
+    }
+}
+\ No newline at end of file