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import { safe, compress } from 'raid-addons'
import { isNull } from 'lodash/fp'
import { actions } from './actions'
import { getHistory } from './history'
import { getRouteIndex, getCurrentRoute } from './utils'
export const DEFAULT_KEY = 'navigation'
const getStorage = storage => {
return isNull(storage)
? null
: storage || (window && window.sessionStorage)
}
/**
* Initial state root
*/
const getInitialState = (storage, history) => {
let initial = {
stack: [getCurrentRoute(null, history)],
index: 0
}
if (!storage) {
return initial
}
try {
let stored = storage.getItem(DEFAULT_KEY)
if (stored) {
return JSON.parse(stored)
}
} catch (err) {
return initial
}
return initial
}
// const initialState = (storage, history) =>
export const setInitial = ({ key, storage, history }) => {
storage = getStorage(storage)
key = key || DEFAULT_KEY
return {
[key]: getInitialState(storage, history)
}
}
export const initial = setInitial({
key: DEFAULT_KEY
})
/**
* Get state root selector function
*/
export const selector = (key = DEFAULT_KEY) => state => state[key]
/**
* Popper
*/
const pop = ({ key, get, state, location, history }) => {
const { index, stack } = get(state)
let routeIndex = getRouteIndex(location, stack)
// If the route was found then use it
Iif (routeIndex >= 0) {
state[key].index = routeIndex
return
}
Eif (index === 0) {
state[key].stack.unshift(getCurrentRoute(location))
return
}
if (index === stack.length - 1) {
console.warn('Attempting to navigate forward but no route exists')
}
}
/**
* pusher
*/
const push = ({ key, get, state, location, history }) => {
const { index, stack } = get(state)
// If we're pushing in to the middle next nuke end of stack
Eif (index < stack.length - 1) {
state[key].stack = stack.slice(0, index + 1)
}
state[key].index = index + 1
state[key].stack.push(getCurrentRoute(location))
}
/**
* Storage
*/
const save = ({ storage, key, state, get }) => {
Iif (!storage) {
return
}
storage.setItem(key, JSON.stringify(get(state)))
}
/**
* Setup
*/
const init = ({ state, storage, history, key, get }) => {
return {
...state,
...setInitial({ key, storage, history })
}
}
/**
* Updates the state based on a navigation pop event
*/
const createUpdatePop = ({ key, history, storage }) => {
const get = selector(key)
return safe((state, payload) => {
pop({ key, get, state, location: payload.location, history })
save({ storage, key, get, state })
})
}
/**
* Updates the state based on a navigation push event
*/
const createUpdatePush = ({ key, history, storage }) => {
const get = selector(key)
return safe((state, payload) => {
push({ key, get, state, location: payload.location, history })
save({ storage, key, get, state })
})
}
const createInit = ({ key, storage, history }) => {
const get = selector(key)
return safe((state, payload) => {
return init({ key, storage, history, state, get })
})
}
/**
* Can be used to create an update function that refs a defined root and
* can be supplied with a specific history instance
*/
export const createUpdate = ({ key, history, storage }) => {
key = key || DEFAULT_KEY
history = getHistory(history)
storage = getStorage(storage)
return compress({
[actions.pop]: createUpdatePop({ key, history, storage }),
[actions.push]: createUpdatePush({ key, history, storage }),
[actions.init]: createInit({ key, history, storage })
})
}
/**
* Update function to register with raid
*/
export const update = createUpdate({
key: DEFAULT_KEY
})
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