demarches-normaliennes/app/javascript/components/ComboBox.tsx

import type { ListBoxItemProps } from 'react-aria-components';
import {
  ComboBox as AriaComboBox,
  ListBox,
  ListBoxItem,
  Popover,
  Input,
  Label,
  Text,
  Button,
  TagGroup,
  TagList,
  Tag
} from 'react-aria-components';
import { useMemo, useRef, createContext, useContext } from 'react';
import type { RefObject } from 'react';
import { findOrCreateContainerElement } from '@coldwired/react';

import {
  useLabelledBy,
  useDispatchChangeEvent,
  useMultiList,
  useSingleList,
  useRemoteList,
  createLoader,
  type ComboBoxProps
} from './react-aria/hooks';
import {
  type Item,
  SingleComboBoxProps,
  MultiComboBoxProps,
  RemoteComboBoxProps
} from './react-aria/props';

const getPortal = () => findOrCreateContainerElement('rac-portal');

export function ComboBox({
  children,
  label,
  description,
  className,
  inputRef,
  ...props
}: ComboBoxProps & { inputRef?: RefObject<HTMLInputElement> }) {
  return (
    <AriaComboBox
      {...props}
      className={`fr-ds-combobox ${className ?? ''}`}
      shouldFocusWrap={true}
    >
      {label ? <Label className="fr-label">{label}</Label> : null}
      {description ? (
        <Text slot="description" className="fr-hint-text">
          {description}
        </Text>
      ) : null}
      <div className="fr-ds-combobox__input" style={{ position: 'relative' }}>
        <Input className="fr-select fr-autocomplete" ref={inputRef} />
        <Button
          style={{
            width: '40px',
            height: '100%',
            position: 'absolute',
            opacity: 0,
            right: 0,
            top: 0
          }}
        >
          {' '}
        </Button>
      </div>
      <Popover
        className="fr-ds-combobox__menu fr-menu"
        UNSTABLE_portalContainer={getPortal()!}
      >
        <ListBox className="fr-menu__list">{children}</ListBox>
      </Popover>
    </AriaComboBox>
  );
}

export function ComboBoxItem(props: ListBoxItemProps<Item>) {
  return <ListBoxItem {...props} className="fr-menu__item" />;
}

export function SingleComboBox({
  children,
  ...maybeProps
}: SingleComboBoxProps) {
  const {
    'aria-labelledby': ariaLabelledby,
    items: defaultItems,
    selectedKey: defaultSelectedKey,
    emptyFilterKey,
    name,
    formValue,
    form,
    data,
    ...props
  } = useMemo(() => SingleComboBoxProps.parse(maybeProps), [maybeProps]);

  const labelledby = useLabelledBy(props.id, ariaLabelledby);
  const { ref, dispatch } = useDispatchChangeEvent();

  const { selectedItem, ...comboBoxProps } = useSingleList({
    defaultItems,
    defaultSelectedKey,
    emptyFilterKey,
    onChange: dispatch
  });

  return (
    <>
      <ComboBox aria-labelledby={labelledby} {...comboBoxProps} {...props}>
        {(item) => <ComboBoxItem id={item.value}>{item.label}</ComboBoxItem>}
      </ComboBox>
      {children || name ? (
        <span ref={ref}>
          <SelectedItemProvider value={selectedItem}>
            {name ? (
              <ComboBoxValueSlot
                field={formValue == 'text' ? 'label' : 'value'}
                name={name}
                form={form}
                data={data}
              />
            ) : null}
            {children}
          </SelectedItemProvider>
        </span>
      ) : null}
    </>
  );
}

export function MultiComboBox(maybeProps: MultiComboBoxProps) {
  const {
    'aria-labelledby': ariaLabelledby,
    items: defaultItems,
    selectedKeys: defaultSelectedKeys,
    name,
    form,
    formValue,
    allowsCustomValue,
    valueSeparator,
    ...props
  } = useMemo(() => MultiComboBoxProps.parse(maybeProps), [maybeProps]);

  const labelledby = useLabelledBy(props.id, ariaLabelledby);
  const { ref, dispatch } = useDispatchChangeEvent();
  const inputRef = useRef<HTMLInputElement>(null);

  const { selectedItems, hiddenInputValues, onRemove, ...comboBoxProps } =
    useMultiList({
      defaultItems,
      defaultSelectedKeys,
      onChange: dispatch,
      formValue,
      allowsCustomValue,
      valueSeparator,
      focusInput: () => {
        inputRef.current?.focus();
      }
    });

  return (
    <div className="fr-ds-combobox__multiple">
      {selectedItems.length > 0 ? (
        <TagGroup onRemove={onRemove} aria-label={props['aria-label']}>
          <TagList items={selectedItems} className="fr-tag-list">
            {selectedItems.map((item) => (
              <Tag
                key={item.value}
                id={item.value}
                textValue={`Retirer ${item.label}`}
                className="fr-tag fr-tag--sm"
              >
                {item.label}
                <Button slot="remove" className="fr-tag--dismiss"></Button>
              </Tag>
            ))}
          </TagList>
        </TagGroup>
      ) : null}
      <ComboBox
        aria-labelledby={labelledby}
        allowsCustomValue={allowsCustomValue}
        inputRef={inputRef}
        {...comboBoxProps}
        {...props}
      >
        {(item) => <ComboBoxItem id={item.value}>{item.label}</ComboBoxItem>}
      </ComboBox>
      {name ? (
        <span ref={ref}>
          {hiddenInputValues.map((value) => (
            <input
              type="hidden"
              value={value}
              name={name}
              form={form}
              key={value}
            />
          ))}
        </span>
      ) : null}
    </div>
  );
}

export function RemoteComboBox({
  loader,
  onChange,
  children,
  ...maybeProps
}: RemoteComboBoxProps) {
  const {
    'aria-labelledby': ariaLabelledby,
    items: defaultItems,
    selectedKey: defaultSelectedKey,
    allowsCustomValue,
    minimumInputLength,
    limit,
    formValue,
    name,
    form,
    data,
    ...props
  } = useMemo(() => RemoteComboBoxProps.parse(maybeProps), [maybeProps]);

  const labelledby = useLabelledBy(props.id, ariaLabelledby);
  const { ref, dispatch } = useDispatchChangeEvent();

  const load = useMemo(
    () =>
      typeof loader == 'string'
        ? createLoader(loader, { minimumInputLength, limit })
        : loader,
    [loader, minimumInputLength, limit]
  );
  const { selectedItem, ...comboBoxProps } = useRemoteList({
    allowsCustomValue,
    defaultItems,
    defaultSelectedKey,
    load,
    onChange: (item) => {
      onChange?.(item);
      dispatch();
    }
  });

  return (
    <>
      <ComboBox
        allowsEmptyCollection={comboBoxProps.inputValue.length > 0}
        allowsCustomValue={allowsCustomValue}
        aria-labelledby={labelledby}
        {...comboBoxProps}
        {...props}
      >
        {(item) => <ComboBoxItem id={item.value}>{item.label}</ComboBoxItem>}
      </ComboBox>
      {children || name ? (
        <span ref={ref}>
          <SelectedItemProvider value={selectedItem}>
            {name ? (
              <ComboBoxValueSlot
                field={
                  formValue == 'text' || allowsCustomValue ? 'label' : 'value'
                }
                name={name}
                form={form}
                data={data}
              />
            ) : null}
            {children}
          </SelectedItemProvider>
        </span>
      ) : null}
    </>
  );
}

export function ComboBoxValueSlot({
  field,
  name,
  form,
  data
}: {
  field: 'label' | 'value' | 'data';
  name: string;
  form?: string;
  data?: Record<string, string>;
}) {
  const selectedItem = useContext(SelectedItemContext);
  const value = getSelectedValue(selectedItem, field);
  const dataProps = Object.fromEntries(
    Object.entries(data ?? {}).map(([key, value]) => [
      `data-${key.replace(/_/g, '-')}`,
      value
    ])
  );
  return (
    <input type="hidden" name={name} value={value} form={form} {...dataProps} />
  );
}

const SelectedItemContext = createContext<Item | null>(null);
const SelectedItemProvider = SelectedItemContext.Provider;

function getSelectedValue(
  selectedItem: Item | null,
  field: 'label' | 'value' | 'data'
): string {
  if (selectedItem == null) {
    return '';
  } else if (field == 'data') {
    if (typeof selectedItem.data == 'string') {
      return selectedItem.data;
    } else if (!selectedItem.data) {
      return '';
    }
    return JSON.stringify(selectedItem.data);
  }
  return selectedItem[field];
}