react-native-ratings/dist/SwipeRating.js

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