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star-ratings.js
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star-ratings.js
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import React from 'react';
import PropTypes from 'prop-types';
import Star from './star';
class StarRatings extends React.Component {
state = {
highestStarHovered: -Infinity
}
fillId = `starGrad${Math.random().toFixed(15).slice(2)}`;
get starRatingsStyle() {
const starRatingsStyle = {
position: 'relative',
boxSizing: 'border-box',
display: 'inline-block'
};
return this.props.ignoreInlineStyles ? {} : starRatingsStyle;
}
get starGradientStyle() {
const starGradientStyle = {
position: 'absolute',
zIndex: '0',
width: '0',
height: '0',
visibility: 'hidden'
};
return this.props.ignoreInlineStyles ? {} : starGradientStyle;
}
stopColorStyle(color) {
const stopColorStyle = {
stopColor: color,
stopOpacity: '1'
};
return this.props.ignoreInlineStyles ? {} : stopColorStyle;
}
get titleText() {
const {
typeOfWidget,
rating: selectedRating
} = this.props;
const hoveredRating = this.state.highestStarHovered;
const currentRating = hoveredRating > 0 ? hoveredRating : selectedRating;
// fix it at 2 decimal places and remove trailing 0s
let formattedRating = parseFloat(currentRating.toFixed(2)).toString();
if (Number.isInteger(currentRating)) {
formattedRating = String(currentRating);
}
let starText = `${typeOfWidget}s`;
if (formattedRating === '1') {
starText = typeOfWidget;
}
return `${formattedRating} ${starText}`;
}
get offsetValue() {
const rating = this.props.rating;
const ratingIsInteger = Number.isInteger(rating);
let offsetValue = '0%';
if (!ratingIsInteger) {
const firstTwoDecimals = rating.toFixed(2).split('.')[1].slice(0, 2);
offsetValue = `${firstTwoDecimals}%`;
}
return offsetValue;
}
hoverOverStar = (starRating) => {
return () => {
this.setState({
highestStarHovered: starRating,
});
}
}
unHoverOverStar = () => {
this.setState({
highestStarHovered: -Infinity,
});
}
get renderStars() {
const {
changeRating,
rating: selectedRating,
numberOfStars,
starDimension,
starSpacing,
starRatedColor,
starEmptyColor,
starHoverColor,
gradientPathName,
ignoreInlineStyles,
svgIconPath,
svgIconViewBox,
name
} = this.props;
const { highestStarHovered } = this.state;
const numberOfStarsArray = Array.apply(null, Array(numberOfStars));
return numberOfStarsArray.map((_, index) => {
const starRating = index + 1;
const isStarred = starRating <= selectedRating;
// hovered only matters when changeRating is true
const hoverMode = highestStarHovered > 0;
const isHovered = starRating <= highestStarHovered;
const isCurrentHoveredStar = starRating === highestStarHovered;
// only matters when changeRating is false
// given star 5 and rating 4.2: 5 > 4.2 && 4 < 4.2;
const isPartiallyFullStar = starRating > selectedRating && starRating - 1 < selectedRating
const isFirstStar = starRating === 1;
const isLastStar = starRating === numberOfStars;
return (
<Star
key={starRating}
fillId={this.fillId}
changeRating={changeRating ? () => changeRating(starRating, name) : null}
hoverOverStar={changeRating ? this.hoverOverStar(starRating) : null}
unHoverOverStar={changeRating ? this.unHoverOverStar : null}
isStarred={isStarred}
isPartiallyFullStar={isPartiallyFullStar}
isHovered={isHovered}
hoverMode={hoverMode}
isCurrentHoveredStar={isCurrentHoveredStar}
isFirstStar={isFirstStar}
isLastStar={isLastStar}
starDimension={starDimension}
starSpacing={starSpacing}
starHoverColor={starHoverColor}
starRatedColor={starRatedColor}
starEmptyColor={starEmptyColor}
gradientPathName={gradientPathName}
ignoreInlineStyles={ignoreInlineStyles}
svgIconPath={svgIconPath}
svgIconViewBox={svgIconViewBox}
/>
);
});
}
render() {
const {
starRatedColor,
starEmptyColor
} = this.props;
return (
<div
className="star-ratings"
title={this.titleText}
style={this.starRatingsStyle}
>
<svg
className="star-grad"
style={this.starGradientStyle}
>
<defs>
<linearGradient id={this.fillId} x1="0%" y1="0%" x2="100%" y2="0%">
<stop offset="0%" className="stop-color-first" style={this.stopColorStyle(starRatedColor)} />
<stop offset={this.offsetValue} className="stop-color-first" style={this.stopColorStyle(starRatedColor)} />
<stop offset={this.offsetValue} className="stop-color-final" style={this.stopColorStyle(starEmptyColor)} />
<stop offset="100%" className="stop-color-final" style={this.stopColorStyle(starEmptyColor)} />
</linearGradient>
</defs>
</svg>
{this.renderStars}
</div>
);
}
}
StarRatings.propTypes = {
rating: PropTypes.number.isRequired,
numberOfStars: PropTypes.number.isRequired,
changeRating: PropTypes.func,
starHoverColor: PropTypes.string.isRequired,
starRatedColor: PropTypes.string.isRequired,
starEmptyColor: PropTypes.string.isRequired,
starDimension: PropTypes.string.isRequired,
starSpacing: PropTypes.string.isRequired,
gradientPathName: PropTypes.string.isRequired,
ignoreInlineStyles: PropTypes.bool.isRequired,
svgIconPath: PropTypes.string.isRequired,
svgIconViewBox: PropTypes.string.isRequired,
name: PropTypes.string
};
StarRatings.defaultProps = {
rating: 0,
typeOfWidget: 'Star',
numberOfStars: 5,
changeRating: null,
starHoverColor: 'rgb(230, 67, 47)',
starRatedColor: 'rgb(109, 122, 130)',
starEmptyColor: 'rgb(203, 211, 227)',
starDimension: '50px',
starSpacing: '7px',
gradientPathName: '',
ignoreInlineStyles: false,
svgIconPath: 'm25,1 6,17h18l-14,11 5,17-15-10-15,10 5-17-14-11h18z',
svgIconViewBox: '0 0 51 48'
};
export default StarRatings;