overleaf/services/web/frontend/js/features/outline/components/documentation-button.tsx

import { useState } from 'react'
import Icon from '../../../shared/components/icon'
import { useSplitTestContext } from '../../../shared/context/split-test-context'
import { sendMB } from '../../../infrastructure/event-tracking'
import PropTypes from 'prop-types'
import { Button } from 'react-bootstrap'

function DocumentationButton() {
  const { splitTestVariants } = useSplitTestContext({
    splitTestVariants: PropTypes.object,
  })
  const documentationButtonVariant =
    splitTestVariants['documentation-on-editor']

  let documentationButtonText = ''

  if (documentationButtonVariant === 'latex-help')
    documentationButtonText = 'LaTeX help'
  else if (documentationButtonVariant === 'documentation')
    documentationButtonText = 'Documentation'
  else if (documentationButtonVariant === 'help-guides')
    documentationButtonText = 'Help guides'
  const [showDocumentationButton, setShowDocumentationButton] = useState(
    !(documentationButtonVariant === 'default')
  )

  function handleCloseClick() {
    sendMB('file-tree-documentation-click')

    setShowDocumentationButton(false)
  }

  function handleDocumentationLinkClick() {
    sendMB('file-tree-documentation-click')
  }

  if (!showDocumentationButton) return null

  return (
    <div className="documentation-btn-container">
      <a
        href="/learn"
        target="_blank"
        rel="noreferrer"
        className="documentation-link"
        onClick={handleDocumentationLinkClick}
      >
        <Icon type="question-circle" className="outline-caret-icon" />
        <h4 className="outline-header-name">{documentationButtonText}</h4>
      </a>
      <Button bsStyle="link" className="documentation-close">
        <Icon
          type="times"
          onClick={handleCloseClick}
          className="outline-caret-icon "
        />
      </Button>
    </div>
  )
}

export default DocumentationButton