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persisted_state.js
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persisted_state.js
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import merge from 'lodash.merge'
import localforage from 'localforage'
import { each, get, set } from 'lodash'
let loaded = false
const defaultReducer = (state, paths) => (
paths.length === 0 ? state : paths.reduce((substate, path) => {
set(substate, path, get(state, path))
return substate
}, {})
)
const saveImmedeatelyActions = [
'markNotificationsAsSeen',
'clearCurrentUser',
'setCurrentUser',
'setHighlight',
'setOption',
'setClientData',
'setToken',
'clearToken'
]
const defaultStorage = (() => {
return localforage
})()
export default function createPersistedState ({
key = 'vuex-lz',
paths = [],
getState = (key, storage) => {
let value = storage.getItem(key)
return value
},
setState = (key, state, storage) => {
if (!loaded) {
console.log('waiting for old state to be loaded...')
return Promise.resolve()
} else {
return storage.setItem(key, state)
}
},
reducer = defaultReducer,
storage = defaultStorage,
subscriber = store => handler => store.subscribe(handler)
} = {}) {
return getState(key, storage).then((savedState) => {
return store => {
try {
if (savedState !== null && typeof savedState === 'object') {
// build user cache
const usersState = savedState.users || {}
usersState.usersObject = {}
const users = usersState.users || []
each(users, (user) => { usersState.usersObject[user.id] = user })
savedState.users = usersState
store.replaceState(
merge({}, store.state, savedState)
)
}
loaded = true
} catch (e) {
console.log("Couldn't load state")
console.error(e)
loaded = true
}
subscriber(store)((mutation, state) => {
try {
if (saveImmedeatelyActions.includes(mutation.type)) {
setState(key, reducer(state, paths), storage)
.then(success => {
if (typeof success !== 'undefined') {
if (mutation.type === 'setOption' || mutation.type === 'setCurrentUser') {
store.dispatch('settingsSaved', { success })
}
}
}, error => {
if (mutation.type === 'setOption' || mutation.type === 'setCurrentUser') {
store.dispatch('settingsSaved', { error })
}
})
}
} catch (e) {
console.log("Couldn't persist state:")
console.log(e)
}
})
}
})
}

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