J UI p 150 creacion componente tabs

.storybook/preview-head.html

@@ -20,6 +20,15 @@
     stroke: #2979FF;
     overflow: visible;
   }
+
+  .r-zIndex-184en5c {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  .css-view-1dbjc4n.r-scrollSnapAlign-cpa5s6 {
+    padding: 0 25%;
+  }
 </style>
 
 

src/components/Tabs/index.test.tsx

@@ -0,0 +1,86 @@
+import React from 'react';
+import {Pressable, Text, View} from 'react-native';
+import {create} from 'react-test-renderer';
+import Tabs from './';
+
+const validScene1 = {
+	title: 'Title1',
+	scene: (
+		<View>
+			<Text>View</Text>
+		</View>
+	),
+};
+const validScene2 = {
+	title: 'Title2',
+	scene: (
+		<View>
+			<Text>View</Text>
+		</View>
+	),
+};
+const validScene3 = {
+	title: 'Title3',
+	scene: (
+		<View>
+			<Text>View</Text>
+		</View>
+	),
+};
+const validScene4 = {
+	title: 'Title4',
+	scene: (
+		<View>
+			<Text>View</Text>
+		</View>
+	),
+};
+
+const validData1 = {
+	scenes: [validScene1],
+	position: 'bottom',
+	scrollContentStyle: {padding: 20},
+	style: {backgroundColor: 'red'},
+};
+
+const validData2 = {
+	scenes: [validScene1, validScene2, validScene3, validScene4],
+	initialTab: 0,
+	onPressTabCn: jest.fn(),
+};
+
+const invalidData1 = {
+	...validData1,
+	scenes: null,
+};
+
+const spyUseEffect = jest.spyOn(React, 'useEffect');
+const spyUseRef = jest.spyOn(React, 'useRef');
+
+spyUseEffect.mockImplementation((f) => f());
+spyUseRef.mockReturnValueOnce({current: {scrollToIndex: jest.fn()}});
+
+describe('Tabs', () => {
+	describe('should be null when', () => {
+		it('scenes is not array or is empty', () => {
+			const {toJSON} = create(<Tabs {...(invalidData1 as any)} />);
+			expect(toJSON()).toBeNull();
+		});
+	});
+
+	describe('should render correct when', () => {
+		it('has minimum data', () => {
+			const {toJSON} = create(<Tabs {...validData2} />);
+			expect(toJSON()).toBeTruthy();
+		});
+
+		it('has valid data and press tab', () => {
+			const {root} = create(<Tabs {...(validData1 as any)} />);
+			const [ButtonComp] = root.findAllByType(Pressable);
+			const {onPress} = ButtonComp.props;
+			onPress();
+
+			expect(root).toBeTruthy();
+		});
+	});
+});

src/components/Tabs/index.tsx

@@ -0,0 +1,173 @@
+/* eslint-disable react-hooks/rules-of-hooks */
+import React, {FC, ReactNode, useEffect, useRef, useState} from 'react';
+import {StyleSheet, View, ViewStyle, ScrollView, FlatList} from 'react-native';
+import {moderateScale, scaledForDevice} from '../../scale';
+import {base, grey, primary} from '../../theme/palette';
+import BaseButton from '../BaseButton';
+import Text from '../Text';
+import {viewportWidth} from '../../scale';
+import {isObject} from '../../utils';
+
+interface Scene {
+	title: string;
+	scene: ReactNode;
+	disabled?: boolean;
+}
+
+export const positions = {
+	top: 'top',
+	bottom: 'bottom',
+};
+
+export type positionsType = typeof positions;
+export type keyPosition = keyof positionsType;
+
+interface TabsProps {
+	scenes: Scene[];
+	initialTab?: number;
+	position?: keyPosition;
+	onPressTabCb?: (activeTab: number) => void;
+	scrollContentStyle?: ViewStyle;
+	style?: ViewStyle;
+}
+
+interface TitleTabProps {
+	title: string;
+	index: number;
+	disabled: boolean | undefined;
+}
+
+const Tabs: FC<TabsProps> = ({
+	scenes,
+	initialTab = 0,
+	position = positions.top,
+	onPressTabCb = () => {},
+	scrollContentStyle = {},
+	style = {},
+	...props
+}) => {
+	if (!scenes || !Array.isArray(scenes) || !scenes.length) {
+		return null;
+	}
+
+	const [activeTab, setActiveTab] = useState(initialTab);
+
+	const scrollViewRef = useRef<any>(null);
+
+	const validScenes = scenes.filter(({scene, title}) => scene && title);
+	const areScenesValid = !!validScenes && Array.isArray(validScenes) && !!validScenes.length;
+	const isValidCurrentScene =
+		!!validScenes[activeTab] &&
+		isObject(validScenes[activeTab]) &&
+		!!Object.keys(validScenes[activeTab]).length;
+
+	const contentDirection = position === positions.bottom ? 'column-reverse' : 'column';
+
+	const isScrollViewTab = scenes?.length && scenes.length > 3;
+	const calculateTabs = isScrollViewTab ? {width: viewportWidth / 3} : {flex: 1};
+	const contentMargin = position === positions.bottom ? {marginBottom: 45} : {marginTop: 45};
+
+	const styles = StyleSheet.create({
+		wrapper: {
+			flex: 1,
+			position: 'relative',
+			flexDirection: contentDirection,
+		},
+		wrapperTab: {
+			position: 'absolute',
+			width: '100%',
+			height: scaledForDevice(48, moderateScale),
+			flexDirection: 'row',
+			backgroundColor: base.white,
+			zIndex: 1,
+			elevation: scaledForDevice(5, moderateScale),
+		},
+		tabButton: {
+			...calculateTabs,
+			justifyContent: 'center',
+			alignItems: 'center',
+			borderBottomWidth: scaledForDevice(2, moderateScale),
+		},
+		title: {
+			textTransform: 'uppercase',
+			fontFamily: 'Roboto-Medium',
+		},
+		content: {
+			...contentMargin,
+		},
+	});
+
+	useEffect(() => {
+		if (isScrollViewTab) {
+			scrollViewRef?.current?.scrollToIndex({
+				index: activeTab,
+				animated: true,
+			});
+		}
+	}, [activeTab, isScrollViewTab]);
+
+	const TitleTab: FC<TitleTabProps> = ({title, disabled, index}) => {
+		const borderBottomColor = index === activeTab ? primary.main : base.white;
+		const textColor = index === activeTab ? primary.main : grey[400];
+
+		const handleOnPress = (idx: number) => {
+			setActiveTab(idx);
+			return onPressTabCb(idx);
+		};
+
+		return (
+			<BaseButton
+				key={title + index}
+				style={{...styles.tabButton, borderBottomColor}}
+				disabled={disabled}
+				onPress={() => handleOnPress(index)}>
+				<Text style={{...styles.title, color: textColor}} selectable={false} numberOfLines={1}>
+					{title}
+				</Text>
+			</BaseButton>
+		);
+	};
+
+	const renderItem = ({item, index}: any) => (
+		<TitleTab title={item.title} disabled={item.disabled} index={index} />
+	);
+
+	return (
+		<View style={[styles.wrapper, style]} {...props}>
+			{!isScrollViewTab && (
+				<View style={styles.wrapperTab}>
+					{areScenesValid &&
+						validScenes.map((scene, idx) => (
+							<TitleTab
+								key={scene.title}
+								title={scene.title}
+								disabled={scene.disabled}
+								index={idx}
+							/>
+						))}
+				</View>
+			)}
+
+			{isScrollViewTab && (
+				<FlatList
+					style={styles.wrapperTab}
+					data={scenes}
+					renderItem={renderItem}
+					ref={scrollViewRef}
+					horizontal
+					pagingEnabled={true}
+					showsHorizontalScrollIndicator={false}
+					keyExtractor={(item, index) => item.title + index}
+				/>
+			)}
+
+			{isValidCurrentScene && (
+				<ScrollView contentContainerStyle={scrollContentStyle} style={styles.content}>
+					{validScenes[activeTab].scene}
+				</ScrollView>
+			)}
+		</View>
+	);
+};
+
+export default Tabs;

src/index.ts

@@ -24,6 +24,7 @@ import BaseButton from './components/BaseButton';
 import Button from './components/Button/index';
 import FullScreenMessage from './components/FullScreenMessage';
 import LayoutWithBottomButtons from './components/LayoutWithBottomButtons';
+import Tabs from './components/Tabs';
 import * as getScale from './scale';
 
 export {
@@ -52,4 +53,5 @@ export {
 	getScale,
 	LayoutWithBottomButtons,
 	FullScreenMessage,
+	Tabs,
 };

src/utils/index.test.tsx

@@ -0,0 +1,13 @@
+import {isObject} from '.';
+
+describe('isObject', () => {
+	it('is true when is object type', () => {
+		const response = isObject({});
+		expect(response).toBe(true);
+	});
+
+	it('is false when is object type', () => {
+		const response = isObject([]);
+		expect(response).toBe(false);
+	});
+});

src/utils/index.tsx

@@ -0,0 +1 @@
+export const isObject = (obj: Object) => !!(obj && obj.constructor === Object);