just-paja/improtresk-web

import { createSelector } from 'reselect'
import { getProgress, getProp, transformData } from 'react-saga-rest'

import { getParticipantDetail } from '../../participants/selectors'

const aggregateJoinedStatus = (room, participant) => ({
  ...room,
  joined: room.inhabitants && room.inhabitants.filter(
    inhabitant => inhabitant.participant_id === participant.id
  ).length !== 0
})

const aggregateFullStatus = room => ({
  ...room,
  full: room.inhabitants.length >= room.size
})

export const getRoomListState = state => state.roommates.rooms
export const getRoomListProgress = getProgress(getRoomListState)
export const getRoomList = transformData(getRoomListState, {
  transformers: [
    {
      select: getParticipantDetail,
      transform: aggregateJoinedStatus
    },
    {
      transform: aggregateFullStatus
    }
  ],
  sort: (a, b) => {
    if (a.full && !b.full) {
      return 1
    }
    if (!a.full && b.full) {
      return -1
    }
    return 0
  }
})

export const getRoomChoice = createSelector(
  getRoomList,
  rooms => rooms.find(room => room.joined)
)

export const getRoomSelectionState = state => state.roommates.roomSelection
export const getRoomSelection = getProp(getRoomSelectionState, 'room')
export const isRoomSelectionLoading = getProp(getRoomSelectionState, 'loading')