sentry/static/app/components/collapsePanel.tsx

import {useState} from 'react';
import {css} from '@emotion/react';
import styled from '@emotion/styled';

import {IconChevron, IconList} from 'sentry/icons';
import {tct} from 'sentry/locale';
import {space} from 'sentry/styles/space';

export const COLLAPSE_COUNT = 5;

type ChildRenderProps = {
  isExpanded: boolean;
  showMoreButton: React.ReactNode;
};

type Props = {
  children: (props: ChildRenderProps) => JSX.Element;
  items: number;
  buttonTitle?: string;
  collapseCount?: number;
  disableBorder?: boolean;
};

/**
 *
 * Used to expand results.
 *
 * Our collapsible component was not used because we want our
 * expand button to be outside the list of children
 *
 */
function CollapsePanel({
  items,
  children,
  buttonTitle,
  collapseCount = COLLAPSE_COUNT,
  disableBorder = true,
}: Props) {
  const [isExpanded, setIsExpanded] = useState(false);
  function expandResults() {
    setIsExpanded(true);
  }

  return children({
    isExpanded,
    showMoreButton:
      isExpanded || items <= collapseCount ? null : (
        <ShowMoreButton
          items={items}
          buttonTitle={buttonTitle}
          collapseCount={collapseCount}
          disableBorder={disableBorder}
          onClick={expandResults}
        />
      ),
  });
}

type ShowMoreButtonProps = {
  items: number;
  onClick: () => void;
  buttonTitle?: string;
  collapseCount?: number;
  disableBorder?: boolean;
};

function ShowMoreButton({
  items,
  buttonTitle = 'More',
  collapseCount = COLLAPSE_COUNT,
  disableBorder = true,
  onClick,
}: ShowMoreButtonProps) {
  return (
    <ShowMore
      onClick={onClick}
      role="button"
      data-test-id="collapse-show-more"
      disableBorder={disableBorder}
    >
      <ShowMoreText>
        <StyledIconList color="gray300" />
        {tct('Show [count] [buttonTitle]', {count: items - collapseCount, buttonTitle})}
      </ShowMoreText>

      <IconChevron color="gray300" direction="down" />
    </ShowMore>
  );
}

export default CollapsePanel;

const ShowMore = styled('div')<{disableBorder: boolean}>`
  display: flex;
  align-items: center;
  padding: ${space(1)} ${space(2)};
  font-size: ${p => p.theme.fontSizeMedium};
  color: ${p => p.theme.subText};
  cursor: pointer;
  border-top: 1px solid ${p => p.theme.border};

  ${p =>
    !p.disableBorder &&
    css`
      border-left: 1px solid ${p.theme.border};
      border-right: 1px solid ${p.theme.border};
      border-bottom: 1px solid ${p.theme.border};
      border-bottom-left-radius: ${p.theme.borderRadius};
      border-bottom-right-radius: ${p.theme.borderRadius};
      margin-bottom: ${space(2)};
    `}
`;

const StyledIconList = styled(IconList)`
  margin-right: ${space(1)};
`;

const ShowMoreText = styled('div')`
  display: flex;
  align-items: center;
  flex-grow: 1;
`;