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import * as _ from 'lodash';
import * as React from 'react';
import { Dispatch } from 'redux';
import { PROGRESS_STALL_AT_PERCENTAGE, PROGRESS_TICK_INTERVAL_MS } from '../constants';
import { Action, actions } from '../redux/actions';
import { ColorOption } from '../style/theme';
import { Container } from './ui/container';
import { Flex } from './ui/flex';
import { Text } from './ui/text';
const TICKS_PER_SECOND = 1000 / PROGRESS_TICK_INTERVAL_MS;
const curTimeUnix = () => {
return new Date().getTime();
};
export interface SimulatedProgressBarProps {
startTimeUnix: number;
expectedEndTimeUnix: number;
ended: boolean;
}
enum TickingRunState {
None = 'None',
Running = 'Running',
Finishing = 'Finishing',
}
interface TickingNoneStatus {
runState: TickingRunState.None;
}
interface TickingRunningStatus {
runState: TickingRunState.Running;
}
interface TickingFinishingStatus {
runState: TickingRunState.Finishing;
increasePercentageEveryTick: number;
}
type TickingStatus = TickingNoneStatus | TickingRunningStatus | TickingFinishingStatus;
export interface SimulatedProgressState {
percentageDone: number;
intervalId?: number;
tickingStatus: TickingStatus;
}
export class SimulatedProgressBar extends React.Component<SimulatedProgressBarProps, SimulatedProgressState> {
public constructor(props: SimulatedProgressBarProps) {
super(props);
// TODO: look into using assert library here?
if (props.expectedEndTimeUnix <= props.startTimeUnix) {
throw new Error('End time before start time');
}
// TODO: use getFreshState here
const intervalId = window.setInterval(this._tick.bind(this), PROGRESS_TICK_INTERVAL_MS);
this.state = {
percentageDone: 0,
intervalId,
tickingStatus: { runState: TickingRunState.Running },
};
}
public componentDidUpdate(prevProps: SimulatedProgressBarProps, prevState: SimulatedProgressState): void {
const percentLeft = 100 - this.state.percentageDone;
const increasePercentageEveryTick = percentLeft / TICKS_PER_SECOND;
// if we just switched to ending, having animate to end
if (prevProps.ended === false && this.props.ended === true) {
this.setState({
tickingStatus: {
runState: TickingRunState.Finishing,
increasePercentageEveryTick,
},
});
return;
}
// later TODO: the new state could be for the wrong order, attach to order state or add concurrency checking
// if anything else changes, reset internal state
if (
prevProps.startTimeUnix !== this.props.startTimeUnix ||
prevProps.expectedEndTimeUnix !== this.props.expectedEndTimeUnix ||
prevProps.ended !== this.props.ended
) {
this.setState(this._getFreshState());
}
}
public componentWillUnmount(): void {
console.log('unmount');
this._clearTimer();
}
public render(): React.ReactNode {
// TODO: Consider moving to seperate component
return (
<Container padding="20px 20px 0px 20px" width="100%">
<Container width="100%" backgroundColor={ColorOption.lightGrey} borderRadius="6px">
<Container
width={`${this.state.percentageDone}%`}
backgroundColor={ColorOption.primaryColor}
borderRadius="6px"
height="6px"
/>
</Container>
</Container>
);
}
private _getFreshState(): SimulatedProgressState {
this._clearTimer();
const intervalId = window.setInterval(this._tick.bind(this), PROGRESS_TICK_INTERVAL_MS);
return {
percentageDone: 0,
intervalId,
tickingStatus: { runState: TickingRunState.Running },
};
}
private _tick(): void {
const rawPercentageDone =
this.state.tickingStatus.runState === TickingRunState.Finishing
? this._getNewPercentageFinishing(this.state.tickingStatus)
: this._getNewPercentageNormal();
const maxPercentage =
this.state.tickingStatus.runState === TickingRunState.Finishing ? 100 : PROGRESS_STALL_AT_PERCENTAGE;
const percentageDone = Math.min(rawPercentageDone, maxPercentage);
this.setState({
percentageDone,
});
if (percentageDone >= 100) {
this._clearTimer();
}
}
private _clearTimer(): void {
if (this.state.intervalId) {
window.clearTimeout(this.state.intervalId);
}
}
// TODO: consider not taking in a parameter here, might be confusing
private _getNewPercentageFinishing(tickingStatus: TickingFinishingStatus): number {
return this.state.percentageDone + tickingStatus.increasePercentageEveryTick;
}
private _getNewPercentageNormal(): number {
const elapsedTimeMs = curTimeUnix() - this.props.startTimeUnix;
const safeElapsedTimeMs = Math.max(elapsedTimeMs, 1);
const expectedAmountOfTimeMs = this.props.expectedEndTimeUnix - this.props.startTimeUnix;
const percentageDone = safeElapsedTimeMs / expectedAmountOfTimeMs * 100;
return percentageDone;
}
}
|
