Simple localStorage function with Storage API fallback for chrome apps.

localStorage.coffee

# Simple localStorage function with Storage API fallback for chrome apps.

class BaseStorage
    getItem: (key) ->
        return sessionStorage.getItem(key)

    setItem: (key, value) ->
        data = {}
        data[key] = value
        chrome.storage.local.set data, ->
        return sessionStorage.setItem(key, value)

    removeItem: (key) ->
        chrome.storage.local.remove key, ->
        return sessionStorage.removeItem(key)

    clear: ->
        chrome.storage.local.clear ->
        return sessionStorage.clear()

    length: ->
        return sessionStorage.length

    key: (n) ->
        return sessionStorage.key(n)


baseStorage = new BaseStorage()

# load data from chrome.storage to sessionStorage
chrome.storage.local.get null, (data) ->
    for key, val of data
        sessionStorage.setItem key, val


Object.defineProperty window, 'localStorage', {
    get: ->
        return baseStorage

    set: (val) ->
        console.log('localStorage is being set')

    configurable: true,
}