frontend/smart-hut/src/components/dashboard/devices/SmartPlug.js

/**
 A smart plug is a plug that has a boolean internal state, i.e., that can be turned on or off, either with the
 SmartHut interface or by a switch.
 The smart plug also stores the total energy consumed while the plug is active, in terms of kilowatt-hours 2(kWh) .
 The user can reset this value.
 **/
import React, { Component } from "react";
import { BottomPanel, StyledDiv } from "./styleComponents";
import Settings from "./DeviceSettings";
import { Image } from "semantic-ui-react";
import {
  energyConsumedStyle,
  imageStyle,
  kwhStyle,
  nameStyle,
} from "./SmartPlugStyle";
import { call } from "../../../client_server";

export default class SmartPlug extends Component {
  constructor(props) {
    super(props);
    this.state = {
      turnedOn: false,
      energyConsumed: 0, // kWh
    };
    this.iconOn = "/img/smart-plug.svg";
    this.iconOff = "/img/smart-plug-off.svg";

    this.stateCallback = (e) => {
      this.setState(
        Object.assign(this.state, {
          energyConsumed: (e.totalConsumption / 1000).toFixed(3),
          turnedOn: e.on,
        })
      );
    };

    call.socketSubscribe(this.props.device.id, this.stateCallback);
  }

  componentWillUnmount() {
    call.socketUnsubscribe(this.props.device.id, this.stateCallback);
  }
  onClickDevice = () => {
    this.props.device.on = !this.state.turnedOn;
    call.deviceUpdate(this.props.device, "smartPlug").then((res) => {
      if (res.status === 200) {
        this.setState((prevState) => ({ turnedOn: !prevState.turnedOn }));
      }
    });
  };

  getIcon = () => {
    if (this.state.turnedOn) {
      return this.iconOn;
    }
    return this.iconOff;
  };

  componentDidMount() {
    this.setState({
      turnedOn: this.props.device.on,
      energyConsumed: this.props.device.totalConsumption,
    });
  }

  render() {
    return (
      <StyledDiv onClick={this.props.edit.mode ? () => {} : this.onClickDevice}>
        <Settings
          deviceId={this.props.device.id}
          edit={this.props.edit}
          onChangeData={(id, newSettings) =>
            this.props.onChangeData(id, newSettings)
          }
        />
        <Image src={this.getIcon()} style={imageStyle} />
        <span style={nameStyle}>
          {this.props.device.name} ({this.props.device.id})
        </span>

        <BottomPanel
          style={
            this.state.turnedOn
              ? { backgroundColor: "#505bda" }
              : { backgroundColor: "#1a2849" }
          }
        >
          <span style={energyConsumedStyle}>{this.state.energyConsumed}</span>
          <span style={kwhStyle}>KWh</span>
        </BottomPanel>
      </StyledDiv>
    );
  }
}