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import React, { PureComponent } from 'react'
import PropTypes from 'prop-types'
import classnames from 'classnames'
export default class ButtonGroup extends PureComponent {
static propTypes = {
defaultActiveButtonIndex: PropTypes.number,
noButtonActiveByDefault: PropTypes.bool,
disabled: PropTypes.bool,
children: PropTypes.array,
className: PropTypes.string,
style: PropTypes.object,
newActiveButtonIndex: PropTypes.number,
}
static defaultProps = {
className: 'button-group',
defaultActiveButtonIndex: 0,
}
state = {
activeButtonIndex: this.props.noButtonActiveByDefault
? null
: this.props.defaultActiveButtonIndex,
}
componentDidUpdate (_, prevState) {
// Provides an API for dynamically updating the activeButtonIndex
if (typeof this.props.newActiveButtonIndex === 'number' && prevState.activeButtonIndex !== this.props.newActiveButtonIndex) {
this.setState({ activeButtonIndex: this.props.newActiveButtonIndex })
}
}
handleButtonClick (activeButtonIndex) {
this.setState({ activeButtonIndex })
}
renderButtons () {
const { children, disabled } = this.props
return React.Children.map(children, (child, index) => {
return child && (
<button
className={classnames(
'button-group__button',
{ 'button-group__button--active': index === this.state.activeButtonIndex },
)}
onClick={() => {
this.handleButtonClick(index)
child.props.onClick && child.props.onClick()
}}
disabled={disabled || child.props.disabled}
key={index}
>
{ child.props.children }
</button>
)
})
}
render () {
const { className, style } = this.props
return (
<div
className={className}
style={style}
>
{ this.renderButtons() }
</div>
)
}
}
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