Add gamepad support

Engine/src/states/Game.ts

@@ -128,6 +128,7 @@ export function GameState(ctx: ContextI): StateI {
   }
   let elapsed: number = 0
   let update = (delta: number) => {
+    checkGamepads()
     elapsed += delta
     modeTimer += delta
     if (isNight && modeTimer >= nightTime) {
@@ -222,15 +223,16 @@ export function GameState(ctx: ContextI): StateI {
   }
 
   let desiredActions: Action[] = []
-  let adjustAction = (type: string, v: number) => {
+  let adjustAction = (type: string, v: number, inc?: boolean) => {
     let action = desiredActions.find(v=>v.type===type)
     if (!action) {
+      if (v === 0) return
       desiredActions.push({
         type: type,
         priority: v,
       })
     } else {
-      action.priority = v
+      action.priority = inc?action.priority+v:v
       if (action.priority <= 0) {
         desiredActions = desiredActions.filter(v=>v!==action)
       }
@@ -268,9 +270,47 @@ export function GameState(ctx: ContextI): StateI {
     window.removeEventListener('keydown', keydown)
   }
 
-  let hookGamepad = () => {
-  }
-  let unhookGamepad = () => {
+  let gamepads: Record<string, Gamepad> = {}
+  window.addEventListener('gamepadconnected', (ev: GamepadEvent) => {
+    gamepads[ev.gamepad.id] = ev.gamepad
+  })
+  window.removeEventListener('gamepaddisconnected', (ev: GamepadEvent) => {
+    delete gamepads[ev.gamepad.id]
+  })
+  function checkGamepads() {
+    //for (let gp of Object.values(gamepads)) {
+    for (let gp of navigator.getGamepads()) {
+      if (!gp || !gp.connected) break
+      if (gp.axes[0] < 0) {
+        adjustAction('west', Math.abs(gp.axes[0]))
+      } else if (gp.axes[0] > 0) {
+        adjustAction('east', gp.axes[0])
+      } else {
+        adjustAction('east', 0)
+        adjustAction('west', 0)
+      }
+      if (gp.axes[1] < 0) {
+        adjustAction('north', Math.abs(gp.axes[1]))
+      } else if (gp.axes[1] > 0) {
+        adjustAction('south', gp.axes[1])
+      } else {
+        adjustAction('north', 0)
+        adjustAction('south', 0)
+      }
+      //console.log(gp.axes, gp.buttons)
+      let attackHeld = false
+      for (let i = 0; i < 4; i++) {
+        let btn = gp.buttons[i]
+        if (btn.pressed) {
+          attackHeld = true
+        }
+      }
+      if (attackHeld) {
+        adjustAction('attack', 2)
+      } else if (desiredActions.find(v=>v.type==='attack')) {
+        adjustAction('attack', 0)
+      }
+    }
   }
 
   let nightfall = (b: boolean) => {