FarmBot/Farmbot-Web-App

import React from "react";
import { ToolTips } from "../../constants";
import { WebcamPanelProps } from "./interfaces";
import { PLACEHOLDER_FARMBOT } from "../../photos/images/image_flipper";
import { Flipper } from "./flipper";
import { sortedFeeds } from "./edit";
import { t } from "../../i18next_wrapper";
import { WebcamImg } from "./webcam_img";
import { Help } from "../../ui";

type State = {
  /** Current index in the webcam feed list.
   *
   * We might need to move this in to Redux and use a UUID instead of an index,
   * depending on user needs.
   */
  current: number;
};

const FALLBACK_FEED = { name: "", url: PLACEHOLDER_FARMBOT };

export function IndexIndicator(props: { i: number, total: number }): JSX.Element {
  const percentWidth = 100 / props.total;
  return props.total > 1
    ? <div className="index-indicator"
      style={{
        width: `${percentWidth}%`,
        left: `calc(-10px + ${props.i} * ${percentWidth}%)`
      }} />
    : <div className={"no-index-indicator"} />;
}

export class Show extends React.Component<WebcamPanelProps, State> {
  NO_FEED = t("No webcams yet. Click the edit button to add a feed URL.");
  PLACEHOLDER_FEED = t("Click the edit button to add or edit a feed URL.");

  getMessage(currentUrl: string) {
    if (this.props.feeds.length) {
      if (currentUrl.includes(PLACEHOLDER_FARMBOT)) {
        return this.PLACEHOLDER_FEED;
      } else {
        return "";
      }
    } else {
      return this.NO_FEED;
    }
  }

  state: State = { current: 0 };

  render() {
    const { props } = this;
    const feeds = sortedFeeds(this.props.feeds).map(x => x.body);
    const flipper = new Flipper(feeds, FALLBACK_FEED, this.state.current);
    const msg = this.getMessage(flipper.current.url);
    const imageClass = msg.length > 0 ? "no-flipper-image-container" : "";
    return <div className={"webcam-widget"}>
      <div className="image-flipper">
        <div className={imageClass}>
          <p>{msg}</p>
          <WebcamImg key={flipper.current.url} src={flipper.current.url} />
        </div>
        <button
          onClick={() => flipper.down((_, current) => this.setState({ current }))}
          hidden={feeds.length < 2}
          disabled={false}
          title={t("Previous image")}
          className="image-flipper-left fb-button">
          {t("Prev")}
        </button>
        <button
          onClick={() => flipper.up((_, current) => this.setState({ current }))}
          hidden={feeds.length < 2}
          disabled={false}
          title={t("Next image")}
          className="image-flipper-right fb-button">
          {t("Next")}
        </button>
      </div>
      <div className={"webcam-buttons"}>
        <Help text={ToolTips.WEBCAM} />
        <p>{flipper.current.name}</p>
        <button
          className="fb-button gray"
          title={t("Edit")}
          onClick={props.onToggle}>
          {t("Edit")}
        </button>
        <IndexIndicator i={this.state.current} total={feeds.length} />
      </div>
    </div>;
  }
}