91 lines
3.4 KiB
JavaScript
91 lines
3.4 KiB
JavaScript
const { find, omit, mapValues, values } = require('lodash')
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const {
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JOIN_MAP,
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LEAVE_MAP,
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JOIN_CALL,
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LEAVE_CALL
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} = require('../frontend/src/Metamaps/Realtime/events')
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const NOT_IN_CONVERSATION = 0
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const IN_CONVERSATION = 1
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const addMapperToMap = (map, userId) => Object.assign({}, map, { [userId]: NOT_IN_CONVERSATION })
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const userStillPresent = (userId, liveMaps) => {
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if (!userId) return false
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let stillPresent = false
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const userIdString = userId.toString()
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values(liveMaps).forEach(presentUsers => {
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if (find(Object.keys(presentUsers), id => id === userIdString)) stillPresent = true
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})
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return stillPresent
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}
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const reducer = (state = { connectedPeople: {}, liveMaps: {} }, action) => {
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const { type, payload } = action
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const { connectedPeople, liveMaps } = state
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const map = payload && liveMaps[payload.mapid]
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const mapWillEmpty = map && Object.keys(map).length === 1
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const callWillFinish = map && (type === LEAVE_CALL || type === 'DISCONNECT') && Object.keys(map).length === 2
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switch (type) {
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case JOIN_MAP:
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return Object.assign({}, state, {
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connectedPeople: Object.assign({}, connectedPeople, {
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[payload.userid]: {
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id: payload.userid,
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username: payload.username,
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avatar: payload.avatar
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}
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}),
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liveMaps: Object.assign({}, liveMaps, {
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[payload.mapid]: addMapperToMap(map || {}, payload.userid)
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})
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})
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case LEAVE_MAP:
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// if the map will empty, remove it from liveMaps, if the map will not empty, just remove the mapper
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const newLiveMaps = mapWillEmpty
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? omit(liveMaps, payload.mapid)
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: Object.assign({}, liveMaps, { [payload.mapid]: omit(map, payload.userid) })
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delete newLiveMaps[undefined]
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delete newLiveMaps[null]
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const updateConnectedPeople = userStillPresent(payload.userid, newLiveMaps) ? connectedPeople : omit(connectedPeople, payload.userid)
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return {
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connectedPeople: updateConnectedPeople,
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liveMaps: newLiveMaps
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}
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case JOIN_CALL:
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// update the user (payload.id is user id) in the given map to be marked in the conversation
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return Object.assign({}, state, {
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liveMaps: Object.assign({}, liveMaps, {
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[payload.mapid]: Object.assign({}, map, {
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[payload.id]: IN_CONVERSATION
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})
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})
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})
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case LEAVE_CALL:
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const newMap = callWillFinish
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? mapValues(map, () => NOT_IN_CONVERSATION)
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: Object.assign({}, map, { [payload.userid]: NOT_IN_CONVERSATION })
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return Object.assign({}, state, {
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liveMaps: Object.assign({}, liveMaps, { [payload.mapid]: newMap })
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})
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case 'DISCONNECT':
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const mapWithoutUser = omit(map, payload.userid)
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const newMapWithoutUser = callWillFinish ? mapValues(mapWithoutUser, () => NOT_IN_CONVERSATION) : mapWithoutUser
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const newLiveMapsWithoutUser = mapWillEmpty ? omit(liveMaps, payload.mapid) : Object.assign({}, liveMaps, { [payload.mapid]: newMapWithoutUser })
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delete newLiveMapsWithoutUser[undefined]
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delete newLiveMapsWithoutUser[null]
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const newConnectedPeople = userStillPresent(payload.userid, newLiveMapsWithoutUser) ? connectedPeople : omit(connectedPeople, payload.userid)
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return {
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connectedPeople: newConnectedPeople,
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liveMaps: newLiveMapsWithoutUser
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}
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default:
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return state
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}
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}
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module.exports = reducer
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