ModalScreen.js

const last = require('lodash/last');
const concat = require('lodash/concat');
const forEach = require('lodash/forEach');
const head = require('lodash/head');
const React = require('react');
const Root = require('../components/Root');
const Button = require('../components/Button')
const Navigation = require('./../services/Navigation');
const { stack } = require('../commons/Layouts');
const Screens = require('./Screens');
const {
  PUSH_BTN,
  MODAL_SCREEN_HEADER,
  MODAL_BTN,
  DISMISS_MODAL_BTN,
  DISMISS_UNKNOWN_MODAL_BTN,
  MODAL_LIFECYCLE_BTN,
  DISMISS_PREVIOUS_MODAL_BTN,
  DISMISS_ALL_PREVIOUS_MODAL_BTN,
  DISMISS_ALL_MODALS_BTN,
  DISMISS_FIRST_MODAL_BTN,
  SET_ROOT
} = require('../testIDs');

class ModalScreen extends React.Component {
  static options() {
    return {
      topBar: {
        testID: MODAL_SCREEN_HEADER,
        title: {
          text: 'Modal'
        }
      }
    };
  }

  render() {
    return (
      <Root componentId={this.props.componentId} footer={`Modal Stack Position: ${this.getModalPosition()}`}>
        <Button label='Show Modal' testID={MODAL_BTN} onPress={this.showModal} />
        <Button label='Dismiss Modal' testID={DISMISS_MODAL_BTN} onPress={this.dismissModal} />
        <Button label='Dismiss Unknown Modal' testID={DISMISS_UNKNOWN_MODAL_BTN} onPress={this.dismissUnknownModal} />
        <Button label='Modal Lifecycle' testID={MODAL_LIFECYCLE_BTN} onPress={this.modalLifecycle} />
        {this.getPreviousModalId() && (<Button label='Dismiss Previous Modal' testID={DISMISS_PREVIOUS_MODAL_BTN} onPress={this.dismissPreviousModal} />)}
        {this.props.previousModalIds && (<Button label='Dismiss All Previous Modals' testID={DISMISS_ALL_PREVIOUS_MODAL_BTN} onPress={this.dismissAllPreviousModals} />)}
        <Button label='Dismiss All Modals' testID={DISMISS_ALL_MODALS_BTN} onPress={this.dismissAllModals} />
        {this.props.previousModalIds && (<Button label='Dismiss First Modal' testID={DISMISS_FIRST_MODAL_BTN} onPress={this.dismissFirstModal} />)}
        <Button label='Push' testID={PUSH_BTN} onPress={this.push} />
        <Button label='Set Root' testID={SET_ROOT} onPress={this.setRoot} />
      </Root>
    );
  }

  showModal = () => {
    Navigation.showModal({
      component: {
        name: Screens.Modal,
        passProps: {
          modalPosition: this.getModalPosition() + 1,
          previousModalIds: concat([], this.props.previousModalIds || [], this.props.componentId)
        }
      }
    });
  }

  dismissModal = async () => await Navigation.dismissModal(this.props.componentId);

  dismissPreviousModal = () => Navigation.dismissModal(this.getPreviousModalId());

  dismissUnknownModal = () => Navigation.dismissModal('unknown');

  dismissAllPreviousModals = () => forEach(this.props.previousModalIds, (id) => Navigation.dismissModal(id));

  dismissFirstModal = () => Navigation.dismissModal(head(this.props.previousModalIds));

  dismissAllModals = () => Navigation.dismissAllModals();

  modalLifecycle = () => Navigation.showModal({
    component: {
      name: Screens.Lifecycle,
      passProps: { isModal: true }
    }
  });

  push = () => Navigation.push(this, Screens.Pushed);

  setRoot = () => Navigation.setRoot(stack(Screens.Pushed));

  getModalPosition = () => this.props.modalPosition || 1;

  getPreviousModalId = () => last(this.props.previousModalIds);
}
module.exports = ModalScreen;