app/javascript/flavours/glitch/reducers/modal.js


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import { MODAL_OPEN, MODAL_CLOSE } from 'flavours/glitch/actions/modal';
import { TIMELINE_DELETE } from 'flavours/glitch/actions/timelines';
import { COMPOSE_UPLOAD_CHANGE_SUCCESS } from 'flavours/glitch/actions/compose';
import { Stack as ImmutableStack, Map as ImmutableMap } from 'immutable';

export default function modal(state = ImmutableStack(), action) {
  switch(action.type) {
  case MODAL_OPEN:
    return state.unshift(ImmutableMap({ modalType: action.modalType, modalProps: action.modalProps }));
  case MODAL_CLOSE:
    return (action.modalType === undefined || action.modalType === state.getIn([0, 'modalType'])) ? state.shift() : state;
  case COMPOSE_UPLOAD_CHANGE_SUCCESS:
    return state.getIn([0, 'modalType']) === 'FOCAL_POINT' ? state.shift() : state;
  case TIMELINE_DELETE:
    return state.filterNot((modal) => modal.get('modalProps').statusId === action.id);
  default:
    return state;
  }
};