♻️ Better cooldown system

src/stage/index.tsx

@@ -3,6 +3,8 @@ import { Show, createSignal, onMount } from "solid-js";
 import { vector2d } from "./vector";
 
 import Player from "./objects/player";
+import CooldownProvider from "./providers/cooldown";
+import CooldownUI from "./ui/cooldown";
 
 const StageContainer = styled("div")`
   width: 100vw;
@@ -32,10 +34,16 @@ export default function Stage() {
   onMount(() => movePlayer(container));
 
   return (
-    <StageContainer ref={container}>
-      <Show when={ready()}>
-        <Player size={64} position={playerPosition} />
-      </Show>
-    </StageContainer>
+    <CooldownProvider>
+      <StageContainer ref={container}>
+        <Show when={ready()}>
+          {/* Objects */}
+          <Player size={64} position={playerPosition} />
+
+          {/* UI Elements */}
+          <CooldownUI />
+        </Show>
+      </StageContainer>
+    </CooldownProvider>
   );
 }

src/stage/objects/player.tsx

@@ -1,6 +1,7 @@
 import { styled } from "solid-styled-components";
 import { createSignal, onCleanup, onMount } from "solid-js";
 import { vector2d } from "../vector";
+import { useCooldown } from "../providers/cooldown";
 
 export default function Player(props: {
   size?: number;
@@ -63,29 +64,19 @@ export default function Player(props: {
 
   // Skills
 
-  let cooldown: { [id: string]: number } = {
-    dash: 0,
-  };
-
-  function reduceCooldown(amount: number = 1) {
-    Object.keys(cooldown).forEach((k) => {
-      if (cooldown[k] > 0) {
-        cooldown[k] -= amount;
-      }
-    });
-  }
+  const [cooldown, { freeze }] = useCooldown();
 
   window.addEventListener("keydown", ({ key }) => {
     // Dash
     // Fast move from one place to another place
     // TL;DR Speed up player movement speed in a short time
     if (key == " " /* Spacebar */) {
-      if (cooldown.dash > 0) return;
+      if (cooldown()["player.skills.dash"] > 0) return;
 
-      const multiplier = 2
+      const multiplier = 2;
       velocity.x *= multiplier;
       velocity.y *= multiplier;
-      cooldown.dash = 1;
+      freeze("player.skills.dash", 1000);
       setTimeout(() => {
         if (velocity.x > speed) velocity.x = speed;
         if (velocity.x < -speed) velocity.x = -speed;
@@ -95,11 +86,6 @@ export default function Player(props: {
     }
   });
 
-  onMount(() => {
-    const loop = setInterval(() => reduceCooldown(0.01), 10);
-    onCleanup(() => clearInterval(loop));
-  });
-
   // Renderer
 
   const PlayerRenderer = styled("div")`

src/stage/providers/cooldown.tsx

@@ -0,0 +1,58 @@
+import {
+  createContext,
+  createSignal,
+  onCleanup,
+  onMount,
+  useContext,
+} from "solid-js";
+
+const CooldownContext = createContext();
+
+export default function CooldownProvider(props: any) {
+  const [cooldown, setCooldown] = createSignal<{ [id: string]: number }>({});
+
+  const store = [
+    cooldown,
+    {
+      freeze(id: string, duration: number) {
+        setCooldown((o) => {
+          o[id] = duration;
+          return o;
+        });
+      },
+      unfreeze(id: string) {
+        setCooldown((o) => {
+          o[id] = 0;
+          return o;
+        });
+      },
+    },
+  ];
+
+  function reduceCooldown(amount: number = 1000) {
+    setCooldown((o) => {
+      Object.keys(o).forEach((k) => {
+        if (o[k] > 0) {
+          o[k] -= amount;
+        }
+      });
+
+      return o;
+    });
+  }
+
+  onMount(() => {
+    const loop = setInterval(() => reduceCooldown(10), 10);
+    onCleanup(() => clearInterval(loop));
+  });
+
+  return (
+    <CooldownContext.Provider value={store}>
+      {props.children}
+    </CooldownContext.Provider>
+  );
+}
+
+export function useCooldown(): any[2] {
+  return useContext(CooldownContext);
+}

src/stage/ui/cooldown.tsx

@@ -0,0 +1,33 @@
+import { For, createSignal } from "solid-js";
+import { styled } from "solid-styled-components";
+import { useCooldown } from "../providers/cooldown";
+
+export default function CooldownUI() {
+  const [cooldown] = useCooldown();
+  const [stack, setStack] = createSignal<any[]>([]);
+
+  const UIContainer = styled("div")`
+    text-align: center;
+    position: absolute;
+
+    width: 100vw;
+    bottom: 200px;
+    left: 0px;
+  `;
+
+  setInterval(() => {
+    setStack(Object.entries(cooldown()).filter((v) => (v[1] as number) > 0));
+  }, 10);
+
+  return (
+    <UIContainer>
+      <For each={stack()}>
+        {(item) => (
+          <div>
+            {item[0]} {[(item[1] as number) / 1000]}s
+          </div>
+        )}
+      </For>
+    </UIContainer>
+  );
+}