From bde137305014ddb23149ad9169824c4c20bc735b Mon Sep 17 00:00:00 2001
From: Amit Raikwar <raikwar.amit.1603@gmail.com>
Date: Tue, 5 Dec 2023 17:54:22 +0530
Subject: [PATCH] 2. Showcase the working of React useReducer hook.

- Managing two states simultaneously.
- Managing three states simultaneously.
---
 src/App.tsx                                   |   9 +-
 src/hooks/usereducer/UseReducerHook.tsx       |  35 ++++++
 .../usereducer/component/ButtonComponent.tsx  |  86 +++++++++++++++
 .../usereducer/component/SliderComponent.tsx  | 102 ++++++++++++++++++
 4 files changed, 228 insertions(+), 4 deletions(-)
 create mode 100644 src/hooks/usereducer/UseReducerHook.tsx
 create mode 100644 src/hooks/usereducer/component/ButtonComponent.tsx
 create mode 100644 src/hooks/usereducer/component/SliderComponent.tsx

diff --git a/src/App.tsx b/src/App.tsx
index 5349b8e..1876077 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,10 +1,11 @@
-import logo from './logo.svg';
-import './App.css';
+import logo from "./logo.svg";
+import "./App.css";
+import ReactUseReducerHooks from "./hooks/usereducer/UseReducerHook";
 
 function App() {
   return (
-    <div className="App">
-    
+    <div className=" h-full w-full">
+      <ReactUseReducerHooks />
     </div>
   );
 }
diff --git a/src/hooks/usereducer/UseReducerHook.tsx b/src/hooks/usereducer/UseReducerHook.tsx
new file mode 100644
index 0000000..9566379
--- /dev/null
+++ b/src/hooks/usereducer/UseReducerHook.tsx
@@ -0,0 +1,35 @@
+import ButtonComponent from "./component/ButtonComponent";
+import SliderComponent from "./component/SliderComponent";
+
+export interface ReactUseStateHooksProps {}
+
+export default function ReactUseReducerHooks(props: ReactUseStateHooksProps) {
+  return (
+    <div className="flex-row justify-normal bg-cover m-5 outline-sky-600">
+      <Row1 />
+      <Row2 />
+    </div>
+  );
+}
+
+function Row1() {
+  return (
+    <>
+      <div className="m-4 py-2 text-lg font-mono">
+        1. Button component with useReducer hook
+      </div>
+      <ButtonComponent />
+    </>
+  );
+}
+
+function Row2() {
+  return (
+    <>
+      <div className="m-4 py-2 text-lg font-mono">
+        2. Slider component with useReducer hook for three component states
+      </div>
+      <SliderComponent />
+    </>
+  );
+}
diff --git a/src/hooks/usereducer/component/ButtonComponent.tsx b/src/hooks/usereducer/component/ButtonComponent.tsx
new file mode 100644
index 0000000..4f999c2
--- /dev/null
+++ b/src/hooks/usereducer/component/ButtonComponent.tsx
@@ -0,0 +1,86 @@
+import { Button } from "@mui/material";
+import { useReducer } from "react";
+
+export interface IButtonComponentProps {}
+
+/**
+ * Enum definition for the action type for the component states.
+ */
+enum Type {
+  INCREMENT = "increment",
+  TOGGLE = "toggle",
+}
+
+/**
+ * Type definition of the action type of the action for component.
+ */
+interface ActionType {
+  type: Type;
+}
+
+/**
+ * Type definition of the total number of the states to manage.
+ */
+interface State {
+  count: number;
+  visible: boolean;
+}
+
+/**
+ * Variable declaration for initial state of the component.
+ */
+const initialState: State = {
+  count: 0,
+  visible: false,
+};
+
+/**
+ * Reducer function to manage the states and actions.
+ *
+ * @param state Total number of the states to manage.
+ * @param action Action related to the state we have to manage.
+ * @returns
+ */
+function reducerFunction(state: State, action: ActionType) {
+  switch (action.type) {
+    case Type.INCREMENT:
+      return { count: state.count + 1, visible: state.visible };
+    case Type.TOGGLE:
+      return { count: state.count, visible: !state.visible };
+  }
+}
+
+/**
+ * Function ui component for the button component.
+ *
+ * @param props Button component properies.
+ * @returns
+ */
+export default function ButtonComponent(props: IButtonComponentProps) {
+  const [state, dispatch] = useReducer(reducerFunction, initialState);
+
+  const handleClick = () => {
+    dispatch({ type: Type.INCREMENT });
+    dispatch({ type: Type.TOGGLE });
+  };
+
+  return (
+    <>
+      <div className="grid grid-cols-3 grid-flow-row gap-2 ">
+        <div className="m-5">
+          <Button variant="contained" fullWidth onClick={handleClick}>
+            Button
+          </Button>
+        </div>
+        <div className=" m-4 p-4 rounded-md text-lg text-end text-sky-800">
+          Counter: {state.count}
+        </div>
+        {state.visible && (
+          <div className=" m-4 p-4 rounded-md border shadow-lg text-lg text-sky-800">
+            Hello I am now visible.
+          </div>
+        )}
+      </div>
+    </>
+  );
+}
diff --git a/src/hooks/usereducer/component/SliderComponent.tsx b/src/hooks/usereducer/component/SliderComponent.tsx
new file mode 100644
index 0000000..3677e1a
--- /dev/null
+++ b/src/hooks/usereducer/component/SliderComponent.tsx
@@ -0,0 +1,102 @@
+import { Button, CircularProgress, Slider } from "@mui/material";
+import { useReducer } from "react";
+
+export interface IButtonComponentProps {}
+
+/**
+ * Enum definition for the action type for the component states.
+ */
+enum Type {
+  CHANGE1 = "change1",
+  INCREMENT = "increment",
+  CHANGE2 = "change1",
+}
+
+/**
+ * Type definition of the action type of the action for component.
+ */
+interface ActionType {
+  type: Type;
+  data: number;
+}
+
+/**
+ * Type definition of the total number of the states to manage.
+ */
+interface State {
+  slide1: number;
+  count: number;
+  slide2: number;
+}
+
+/**
+ * Variable declaration for initial state of the component.
+ */
+const initialState: State = {
+  slide1: 0,
+  count: 0,
+  slide2: 0,
+};
+
+/**
+ * Reducer function to manage the states and actions.
+ *
+ * @param state Total number of the states to manage.
+ * @param action Action related to the state we have to manage.
+ * @returns
+ */
+function reducerFunction(state: State, action: ActionType) {
+  switch (action.type) {
+    case Type.CHANGE1:
+      return {
+        slide1: action.data,
+        count: action.data,
+        slide2: action.data,
+      };
+    case Type.INCREMENT:
+      return {
+        slide1: state.slide1,
+        count: state.count,
+        slide2: state.slide2,
+      };
+    case Type.CHANGE2:
+      return {
+        slide1: action.data,
+        count: action.data,
+        slide2: action.data,
+      };
+  }
+}
+
+/**
+ * Function ui component for the button component.
+ *
+ * @param props Button component properies.
+ * @returns
+ */
+export default function ButtonComponent(props: IButtonComponentProps) {
+  const [state, dispatch] = useReducer(reducerFunction, initialState);
+
+  const handleSlidingEvent = (e: any) => {
+    dispatch({ type: Type.CHANGE1, data: e.target.value });
+    dispatch({ type: Type.CHANGE2, data: e.target.value });
+    dispatch({ type: Type.INCREMENT, data: e.target.value });
+  };
+
+  return (
+    <>
+      <div className="grid grid-cols-3 grid-flow-row gap-2 ">
+        <div className="m-5">
+          <Slider value={state.slide1} onChange={handleSlidingEvent} />
+        </div>
+        <div className="grid grid-cols-2 self-center text-sky-800 grid-flow-row gap-2 text-lg">
+          <div className="mx-2 text-end">Circular progress</div>
+          <CircularProgress value={state.count} variant="determinate" />
+        </div>
+        <div className="m-5">
+          <Slider value={state.slide2} onChange={handleSlidingEvent} />
+        </div>
+      </div>
+    </>
+  );
+}