Lidarr/frontend/src/Artist/ArtistBanner.js

import _ from 'lodash';
import PropTypes from 'prop-types';
import React, { Component } from 'react';
import LazyLoad from 'react-lazyload';

const bannerPlaceholder = 'data:image/png;base64,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';

function findBanner(images) {
  return _.find(images, { coverType: 'banner' });
}

function getBannerUrl(banner, size) {
  if (banner) {
    if (banner.url.contains('lastWrite=') || (/^https?:/).test(banner.url)) {
    // Remove protocol
      let url = banner.url.replace(/^https?:/, '');
      url = url.replace('banner.jpg', `banner-${size}.jpg`);

      return url;
    }
  }
}

class ArtistBanner extends Component {

  //
  // Lifecycle

  constructor(props, context) {
    super(props, context);

    const pixelRatio = Math.floor(window.devicePixelRatio);

    const {
      images,
      size
    } = props;

    const banner = findBanner(images);

    this.state = {
      pixelRatio,
      banner,
      bannerUrl: getBannerUrl(banner, pixelRatio * size),
      isLoaded: false,
      hasError: false
    };
  }

  componentDidUpdate(prevProps) {
    const {
      images,
      size
    } = this.props;

    const {
      banner,
      pixelRatio
    } = this.state;

    const nextBanner = findBanner(images);

    if (nextBanner && (!banner || nextBanner.url !== banner.url)) {
      this.setState({
        banner: nextBanner,
        bannerUrl: getBannerUrl(nextBanner, pixelRatio * size),
        hasError: false
        // Don't reset isLoaded, as we want to immediately try to
        // show the new image, whether an image was shown previously
        // or the placeholder was shown.
      });
    }
  }

  //
  // Listeners

  onError = () => {
    this.setState({ hasError: true });
  }

  onLoad = () => {
    this.setState({
      isLoaded: true,
      hasError: false
    });
  }

  //
  // Render

  render() {
    const {
      className,
      style,
      size,
      lazy,
      overflow
    } = this.props;

    const {
      bannerUrl,
      hasError,
      isLoaded
    } = this.state;

    if (hasError || !bannerUrl) {
      return (
        <img
          className={className}
          style={style}
          src={bannerPlaceholder}
        />
      );
    }

    if (lazy) {
      return (
        <LazyLoad
          height={size}
          offset={100}
          overflow={overflow}
          placeholder={
            <img
              className={className}
              style={style}
              src={bannerPlaceholder}
            />
          }
        >
          <img
            className={className}
            style={style}
            src={bannerUrl}
            onError={this.onError}
          />
        </LazyLoad>
      );
    }

    return (
      <img
        className={className}
        style={style}
        src={isLoaded ? bannerUrl : bannerPlaceholder}
        onError={this.onError}
        onLoad={this.onLoad}
      />
    );
  }
}

ArtistBanner.propTypes = {
  className: PropTypes.string,
  style: PropTypes.object,
  images: PropTypes.arrayOf(PropTypes.object).isRequired,
  size: PropTypes.number.isRequired,
  lazy: PropTypes.bool.isRequired,
  overflow: PropTypes.bool.isRequired
};

ArtistBanner.defaultProps = {
  size: 70,
  lazy: true,
  overflow: false
};

export default ArtistBanner;