(function() {
/* Start angularLocalStorage */
'use strict';
var angularLocalStorage = angular.module('LocalStorageModule', []);

angularLocalStorage.provider('localStorageService', function(){
  // You should set a prefix to avoid overwriting any local storage variables from the rest of your app
  // e.g. angularLocalStorage.constant('prefix', 'youAppName');
  this.prefix = 'ls';
  // Cookie options (usually in case of fallback)
  // expiry = Number of days before cookies expire // 0 = Does not expire
  // path = The web path the cookie represents
  this.cookie = {
    expiry: 30,
    path: '/'
  };
  this.notify = {
    setItem: true,
    removeItem: false
  };
  this.setPrefix = function(prefix){
    this.prefix = prefix;
  };
  this.setStorageCookie = function(exp, path){
    this.cookie = {
      expiry: exp,
      path: path
    };
  };
  this.setNotify = function(itemSet, itemRemove){
    this.notify = {
      setItem: itemSet,
      removeItem: itemRemove
    };
  };

  this.$get = ['$rootScope',function($rootScope){

    var prefix = this.prefix;
    // If there is a prefix set in the config lets use that with an appended period for readability
    if (prefix.substr(-1)!=='.') {
        prefix = !!prefix ? prefix + '.' : '';
    }

    // Checks the browser to see if local storage is supported
    var browserSupportsLocalStorage = function () {
      try {
        var supported = ('localStorage' in window && window['localStorage'] !== null);

        // When Safari (OS X or iOS) is in private browsing mode, it appears as though localStorage
        // is available, but trying to call .setItem throws an exception.
        //
        // "QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to add something to storage
        // that exceeded the quota."
        var key = prefix + '__' + Math.round(Math.random() * 1e7);
        if (supported) {
          localStorage.setItem(key, '');
          localStorage.removeItem(key);
        }

        return true;
      } catch (e) {
        $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
        return false;
      }
    };

                // If this browser does not support local storage use cookies
                if (!browserSupportsLocalStorage()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
                    if (notify.setItem) {
                        $rootScope.$broadcast('LocalStorageModule.notification.setitem', {key: key, newvalue: value, storageType: 'cookie'});
                    }
                    return addToCookies(key, value);
                }

                // Let's convert undefined values to null to get the value consistent
                if (typeof value === "undefined") {
                    value = null;
                }

                try {
                    if (angular.isObject(value) || angular.isArray(value)) {
                        value = angular.toJson(value);
                    }
                    localStorage.setItem(prefix+key, value);
                    if (notify.setItem) {
                        $rootScope.$broadcast('LocalStorageModule.notification.setitem', {key: key, newvalue: value, storageType: 'localStorage'});
                    }
                } catch (e) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
                    return addToCookies(key, value);
                }
                return true;
            };

            // Directly get a value from local storage
            // Example use: localStorageService.get('library'); // returns 'angular'
            var getFromLocalStorage = function (key) {
                if (!browserSupportsLocalStorage()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
                    return getFromCookies(key);
                }

                var item = localStorage.getItem(prefix+key);
                // angular.toJson will convert null to 'null', so a proper conversion is needed
                // FIXME not a perfect solution, since a valid 'null' string can't be stored
                if (!item || item === 'null') {return null;}

                if (item.charAt(0) === "{" || item.charAt(0) === "[") {
                    return angular.fromJson(item);
                }
                return item;
            };

            // Remove an item from local storage
            // Example use: localStorageService.remove('library'); // removes the key/value pair of library='angular'
            var removeFromLocalStorage = function (key) {
                if (!browserSupportsLocalStorage()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
                    if (notify.removeItem) {
                        $rootScope.$broadcast('LocalStorageModule.notification.removeitem', {key: key, storageType: 'cookie'});
                    }
                    return removeFromCookies(key);
                }

                try {
                    localStorage.removeItem(prefix+key);
                    if (notify.removeItem) {
                        $rootScope.$broadcast('LocalStorageModule.notification.removeitem', {key: key, storageType: 'localStorage'});
                    }
                } catch (e) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
                    return removeFromCookies(key);
                }
                return true;
            };

            // Return array of keys for local storage
            // Example use: var keys = localStorageService.keys()
            var getKeysForLocalStorage = function () {

                if (!browserSupportsLocalStorage()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
                    return false;
                }

                var prefixLength = prefix.length;
                var keys = [];
                for (var key in localStorage) {
                    // Only return keys that are for this app
                    if (key.substr(0,prefixLength) === prefix) {
                        try {
                            keys.push(key.substr(prefixLength));
                        } catch (e) {
                            $rootScope.$broadcast('LocalStorageModule.notification.error',e.Description);
                            return [];
                        }
                    }
                }
                return keys;
            };

            // Remove all data for this app from local storage
            // Example use: localStorageService.clearAll();
            // Should be used mostly for development purposes
            var clearAllFromLocalStorage = function () {

                if (!browserSupportsLocalStorage()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.warning','LOCAL_STORAGE_NOT_SUPPORTED');
                    return clearAllFromCookies();
                }

                var prefixLength = prefix.length;

                for (var key in localStorage) {
                    // Only remove items that are for this app
                    if (key.substr(0,prefixLength) === prefix) {
                        try {
                            removeFromLocalStorage(key.substr(prefixLength));
                        } catch (e) {
                            $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
                            return clearAllFromCookies();
                        }
                    }
                }
                return true;
            };

            // Checks the browser to see if cookies are supported
            var browserSupportsCookies = function() {
                try {
                    return navigator.cookieEnabled ||
                        ("cookie" in document && (document.cookie.length > 0 ||
                            (document.cookie = "test").indexOf.call(document.cookie, "test") > -1));
                } catch (e) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
                    return false;
                }
            };

            // Directly adds a value to cookies
            // Typically used as a fallback is local storage is not available in the browser
            // Example use: localStorageService.cookie.add('library','angular');
            var addToCookies = function (key, value) {

                if (typeof value === "undefined") {
                    return false;
                }

                if (!browserSupportsCookies()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error','COOKIES_NOT_SUPPORTED');
                    return false;
                }

                try {
                    var expiry = '', expiryDate = new Date();
                    if (value === null) {
                        // Mark that the cookie has expired one day ago
                        expiryDate.setTime(expiryDate.getTime() + (-1 * 24*60*60*1000));
                        expiry = "; expires="+expiryDate.toGMTString();

                        value = '';
                    } else if (cookie.expiry !== 0) {
                        expiryDate.setTime(expiryDate.getTime() + (cookie.expiry*24*60*60*1000));
                        expiry = "; expires="+expiryDate.toGMTString();
                    }
                    if (!!key) {
                        document.cookie = prefix + key + "=" + encodeURIComponent(value) + expiry + "; path="+cookie.path;
                    }
                } catch (e) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error',e.message);
                    return false;
                }
                return true;
            };

            // Directly get a value from a cookie
            // Example use: localStorageService.cookie.get('library'); // returns 'angular'
            var getFromCookies = function (key) {
                if (!browserSupportsCookies()) {
                    $rootScope.$broadcast('LocalStorageModule.notification.error','COOKIES_NOT_SUPPORTED');
                    return false;
                }

                var cookies = document.cookie.split(';');
                for(var i=0;i < cookies.length;i++) {
                    var thisCookie = cookies[i];
                    while (thisCookie.charAt(0)===' ') {
                        thisCookie = thisCookie.substring(1,thisCookie.length);
                    }
                    if (thisCookie.indexOf(prefix+key+'=') === 0) {
                        return decodeURIComponent(thisCookie.substring(prefix.length+key.length+1,thisCookie.length));
                    }
                }
                return null;
            };

            var removeFromCookies = function (key) {
                addToCookies(key,null);
            };

            var clearAllFromCookies = function () {
                var thisCookie = null, thisKey = null;
                var prefixLength = prefix.length;
                var cookies = document.cookie.split(';');
                for(var i=0;i < cookies.length;i++) {
                    thisCookie = cookies[i];
                    while (thisCookie.charAt(0)===' ') {
                        thisCookie = thisCookie.substring(1,thisCookie.length);
                    }
                    key = thisCookie.substring(prefixLength,thisCookie.indexOf('='));
                    removeFromCookies(key);
                }
            };

            return {
                isSupported: browserSupportsLocalStorage,
                set: addToLocalStorage,
                add: addToLocalStorage, //DEPRECATED
                get: getFromLocalStorage,
                keys: getKeysForLocalStorage,
                remove: removeFromLocalStorage,
                clearAll: clearAllFromLocalStorage,
                cookie: {
                    set: addToCookies,
                    add: addToCookies, //DEPRECATED
                    get: getFromCookies,
                    remove: removeFromCookies,
                    clearAll: clearAllFromCookies
                }
            };
        }]
    });
}).call(this);