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import { call, put, select, getContext } from 'redux-saga/effects'
import { fetchTopology, updateTopology } from '../../api/topologies'
import { Topology } from '../../util/topology-schema'
import { denormalize, normalize } from 'normalizr'
import { storeTopology } from '../actions/topologies'
/**
* Fetches and normalizes the topology with the specified identifier.
*/
export const fetchAndStoreTopology = function* (id) {
const auth = yield getContext('auth')
let topology = yield select((state) => state.objects.topology[id])
if (!topology) {
const newTopology = yield call(fetchTopology, auth, id)
const { entities } = normalize(newTopology, Topology)
yield put(storeTopology(entities))
}
return topology
}
export const updateTopologyOnServer = function* (id) {
const topology = yield denormalizeTopology(id)
const auth = yield getContext('auth')
yield call(updateTopology, auth, topology)
}
/**
* Denormalizes the topology representation in order to be stored on the server.
*/
export const denormalizeTopology = function* (id) {
const objects = yield select((state) => state.objects)
const topology = objects.topology[id]
return denormalize(topology, Topology, objects)
}
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