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345 lines
12 KiB
345 lines
12 KiB
import React, { Component } from "react";
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import times from "lodash/times";
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import { View, Text, Animated, PanResponder, Image, StyleSheet, Platform, Dimensions } from "react-native";
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// RATING IMAGES WITH STATIC BACKGROUND COLOR (white)
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const STAR_IMAGE = require("./images/star.png");
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const HEART_IMAGE = require("./images/heart.png");
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const ROCKET_IMAGE = require("./images/rocket.png");
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const BELL_IMAGE = require("./images/bell.png");
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const TYPES = {
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star: {
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source: STAR_IMAGE,
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color: "#f1c40f",
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backgroundColor: "white"
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},
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heart: {
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source: HEART_IMAGE,
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color: "#e74c3c",
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backgroundColor: "white"
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},
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rocket: {
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source: ROCKET_IMAGE,
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color: "#2ecc71",
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backgroundColor: "white"
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},
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bell: {
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source: BELL_IMAGE,
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color: "#f39c12",
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backgroundColor: "white"
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},
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custom: {}
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};
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const fractionsType = (props, propName, componentName) => {
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if (props[propName]) {
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const value = props[propName];
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if (typeof value === "number") {
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return value >= 0 && value <= 20 ?
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null :
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new Error(`\`${propName}\` in \`${componentName}\` must be between 0 and 20`);
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}
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return new Error(`\`${propName}\` in \`${componentName}\` must be a number`);
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}
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};
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export default class SwipeRating extends Component {
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constructor(props) {
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super(props);
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const { onStartRating, onSwipeRating, onFinishRating, fractions } = this.props;
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const position = new Animated.ValueXY();
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const panResponder = PanResponder.create({
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onStartShouldSetPanResponder: () => true,
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onPanResponderGrant: (event, gesture) => {
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const newPosition = new Animated.ValueXY();
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const tapPositionX = gesture.x0 - this.state.centerX + gesture.dx;
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newPosition.setValue({ x: tapPositionX, y: 0 });
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if (this.state.isComponentMounted) {
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this.setState({ position: newPosition, value: tapPositionX });
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const rating = this.getCurrentRating(tapPositionX);
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if (typeof onStartRating === "function") {
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onStartRating(rating);
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}
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}
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},
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onPanResponderMove: (event, gesture) => {
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const newPosition = new Animated.ValueXY();
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const tapPositionX = gesture.x0 - this.state.centerX + gesture.dx;
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newPosition.setValue({ x: tapPositionX, y: 0 });
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if (this.state.isComponentMounted) {
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this.setState({ position: newPosition, value: tapPositionX });
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const rating = this.getCurrentRating(tapPositionX);
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if (typeof onSwipeRating === "function") {
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onSwipeRating(rating);
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}
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}
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},
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onPanResponderRelease: () => {
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const rating = this.getCurrentRating(this.state.value);
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if (rating >= this.props.minValue) {
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if (!fractions) {
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// 'round up' to the nearest rating image
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this.setCurrentRating(rating);
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}
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if (typeof onFinishRating === "function") {
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onFinishRating(rating);
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}
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}
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}
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});
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this.state = {
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panResponder,
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position,
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display: false,
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isComponentMounted: false
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};
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}
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componentDidMount() {
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try {
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this.setState({ display: true, isComponentMounted: true }, () => this.setCurrentRating(this.props.startingValue));
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}
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catch (err) {
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// eslint-disable-next-line no-console
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console.log(err);
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}
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}
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componentDidUpdate(prevProps) {
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if (this.props.startingValue !== prevProps.startingValue) {
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this.setCurrentRating(this.props.startingValue);
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}
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}
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handleLayoutChange() {
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// eslint-disable-next-line max-params
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this.ratingRef.measure((fx, fy, width, height, px) => {
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const halfWidth = width / 2;
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const pageXWithinWindow = px % Dimensions.get("window").width;
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this.setState({
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centerX: pageXWithinWindow + halfWidth
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});
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});
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}
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getPrimaryViewStyle() {
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const { position } = this.state;
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const { imageSize, ratingCount, type } = this.props;
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const { color } = TYPES[type];
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const width = position.x.interpolate({
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inputRange: [
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-ratingCount * (imageSize / 2),
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0,
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ratingCount * (imageSize / 2)
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],
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outputRange: [
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0,
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ratingCount * imageSize / 2,
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ratingCount * imageSize
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],
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extrapolate: "clamp"
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}, {
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useNativeDriver: true
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});
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return {
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backgroundColor: color,
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width,
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height: width ? imageSize : 0
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};
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}
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getSecondaryViewStyle() {
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const { position } = this.state;
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const { imageSize, ratingCount, type } = this.props;
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const { backgroundColor } = TYPES[type];
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const width = position.x.interpolate({
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inputRange: [
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-ratingCount * (imageSize / 2),
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0,
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ratingCount * (imageSize / 2)
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],
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outputRange: [
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ratingCount * imageSize,
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ratingCount * imageSize / 2,
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0
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],
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extrapolate: "clamp"
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}, {
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useNativeDriver: true
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});
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return {
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backgroundColor,
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width,
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height: width ? imageSize : 0
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};
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}
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renderRatings() {
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const { imageSize, ratingCount, type, tintColor } = this.props;
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const { source } = TYPES[type];
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return times(ratingCount, index => <View key={index} style={styles.starContainer}>
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<Image source={source} style={{ width: imageSize, height: imageSize, tintColor }}/>
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</View>);
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}
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// eslint-disable-next-line max-statements
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getCurrentRating(value) {
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const { fractions, imageSize, ratingCount } = this.props;
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const startingValue = ratingCount / 2;
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let currentRating = this.props.minValue ? this.props.minValue : 0;
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if (value > ratingCount * imageSize / 2) {
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currentRating = ratingCount;
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}
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else if (value < -ratingCount * imageSize / 2) {
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currentRating = this.props.minValue ? this.props.minValue : 0;
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}
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else if (value <= imageSize || value > imageSize) {
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const diff = value / imageSize;
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currentRating = startingValue + diff;
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currentRating = fractions ?
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Number(currentRating.toFixed(fractions)) :
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Math.ceil(currentRating);
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}
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else {
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currentRating = fractions ?
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Number(startingValue.toFixed(fractions)) :
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Math.ceil(startingValue);
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}
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if (this.props.jumpValue > 0 &&
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this.props.jumpValue < this.props.ratingCount) {
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return (Math.ceil(currentRating * (1 / this.props.jumpValue)) /
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(1 / this.props.jumpValue));
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}
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else {
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return currentRating;
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}
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}
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// eslint-disable-next-line max-statements
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setCurrentRating(rating) {
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const { imageSize, ratingCount } = this.props;
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// `initialRating` corresponds to `startingValue` in the getter. Naming it
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// Differently here avoids confusion with `value` below.
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const initialRating = ratingCount / 2;
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let value = null;
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if (rating > ratingCount) {
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value = ratingCount * imageSize / 2;
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}
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else if (rating < 0) {
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value = -ratingCount * imageSize / 2;
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}
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else if (rating < ratingCount / 2 || rating > ratingCount / 2) {
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value = (rating - initialRating) * imageSize;
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}
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else {
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value = 0;
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}
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const newPosition = new Animated.ValueXY();
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newPosition.setValue({ x: value, y: 0 });
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if (this.state.isComponentMounted) {
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this.setState({ position: newPosition, value });
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}
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}
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displayCurrentRating() {
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const { ratingCount, type, readonly, showReadOnlyText, ratingTextColor } = this.props;
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const color = ratingTextColor || TYPES[type].color;
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return (<View style={styles.showRatingView}>
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<View style={styles.ratingView}>
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<Text style={[styles.ratingText, { color }]}>Rating: </Text>
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<Text style={[styles.currentRatingText, { color }]}>
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{this.getCurrentRating(this.state.value)}
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</Text>
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<Text style={[styles.maxRatingText, { color }]}>/{ratingCount}</Text>
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</View>
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<View>
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{readonly && showReadOnlyText &&
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<Text style={[styles.readonlyLabel, { color }]}>(readonly)</Text>}
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</View>
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</View>);
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}
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render() {
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const { readonly, type, ratingImage, ratingColor, ratingBackgroundColor, style, showRating } = this.props;
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if (type === "custom") {
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const custom = {
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source: ratingImage,
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color: ratingColor,
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backgroundColor: ratingBackgroundColor
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};
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TYPES.custom = custom;
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}
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return this.state.display ?
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<View pointerEvents={readonly ? "none" : "auto"} style={style}>
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{showRating && this.displayCurrentRating()}
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<View style={styles.starsWrapper} {...this.state.panResponder.panHandlers}>
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<View style={styles.starsInsideWrapper} onLayout={() => {
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this.handleLayoutChange();
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}} ref={view => {
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this.ratingRef = view;
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}}>
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<Animated.View style={this.getPrimaryViewStyle()}/>
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<Animated.View style={this.getSecondaryViewStyle()}/>
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</View>
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{this.renderRatings()}
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</View>
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</View> :
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null;
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}
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componentWillUnmount() {
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this.setState({ isComponentMounted: false });
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}
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}
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SwipeRating.defaultProps = {
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type: "star",
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ratingImage: STAR_IMAGE,
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ratingColor: "#f1c40f",
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ratingBackgroundColor: "white",
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ratingCount: 5,
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showReadOnlyText: true,
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imageSize: 40,
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minValue: 0,
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jumpValue: 0
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};
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const styles = StyleSheet.create({
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starsWrapper: {
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flexDirection: "row",
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justifyContent: "center",
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alignItems: "center"
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},
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starsInsideWrapper: {
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position: "absolute",
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top: 0,
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left: 0,
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right: 0,
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bottom: 0,
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flexDirection: "row",
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justifyContent: "center",
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alignItems: "center"
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},
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showRatingView: {
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flexDirection: "column",
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justifyContent: "center",
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alignItems: "center",
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paddingBottom: 5
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},
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ratingView: {
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flexDirection: "row",
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justifyContent: "center",
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alignItems: "center",
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paddingBottom: 5
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},
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ratingText: {
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fontSize: 15,
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textAlign: "center",
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fontFamily: Platform.OS === "ios" ? "Trebuchet MS" : null,
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color: "#34495e"
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},
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readonlyLabel: {
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justifyContent: "center",
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alignItems: "center",
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fontSize: 12,
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textAlign: "center",
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fontFamily: Platform.OS === "ios" ? "Trebuchet MS" : null,
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color: "#34495a"
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},
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currentRatingText: {
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fontSize: 30,
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textAlign: "center",
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fontFamily: Platform.OS === "ios" ? "Trebuchet MS" : null
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},
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maxRatingText: {
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fontSize: 18,
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textAlign: "center",
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fontFamily: Platform.OS === "ios" ? "Trebuchet MS" : null,
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color: "#34495e"
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}
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});
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