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Handle localstorage failure more gracefully

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This commit is contained in:
Colin McLeod
2015-05-27 01:08:51 -07:00
parent a1939fad55
commit 9c9737f978
4 changed files with 52 additions and 12 deletions
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53
app/js/service-persist.js
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@@ -5,12 +5,22 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
var LS_KEY_BUILDS = 'builds';
var LS_KEY_COMPARISONS = 'comparisons';
var localStorage = $window.localStorage;
var buildJson = localStorage.getItem(LS_KEY_BUILDS);
var comparisonJson = localStorage.getItem(LS_KEY_COMPARISONS);
var buildJson = null;
var comparisonJson = null;
// Safe check to determine if localStorage is enabled
try {
localStorage.setItem('s', 1);
localStorage.removeItem('s');
buildJson = localStorage.getItem(LS_KEY_BUILDS);
comparisonJson = localStorage.getItem(LS_KEY_COMPARISONS);
this.lsEnabled = true;
} catch(e) {
this.lsEnabled = false;
}
this.builds = buildJson? angular.fromJson(buildJson) : {};
this.comparisons = comparisonJson? angular.fromJson(comparisonJson) : {};
var buildCount = Object.keys(this.builds).length;
this.state = {
@@ -26,6 +36,10 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
* @param {string} code The serialized code
*/
this.saveBuild = function (shipId, name, code) {
if (!this.lsEnabled) {
return;
}
if (!this.builds[shipId]) {
this.builds[shipId] = {};
}
@@ -63,7 +77,7 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
* @param {string} name The name of the build
*/
this.deleteBuild = function (shipId, name) {
if(this.builds[shipId][name]) {
if(this.lsEnabled && this.builds[shipId][name]) {
delete this.builds[shipId][name];
if (Object.keys(this.builds[shipId]).length === 0) {
delete this.builds[shipId];
@@ -94,6 +108,10 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
* @param {array} facets Array of facet indices
*/
this.saveComparison = function (name, builds, facets){
if (!this.lsEnabled) {
return;
}
if (!this.comparisons[name]) {
this.comparisons[name] = {};
}
@@ -122,7 +140,7 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
* @param {string} name Comparison name
*/
this.deleteComparison = function (name) {
if (this.comparisons[name]) {
if (this.lsEnabled && this.comparisons[name]) {
delete this.comparisons[name];
localStorage.setItem(LS_KEY_COMPARISONS, angular.toJson(this.comparisons));
this.state.hasComparisons = Object.keys(this.comparisons).length > 0;
@@ -137,8 +155,29 @@ angular.module('app').service('Persist', ['$window','lodash', function ($window,
angular.copy({}, this.comparisons);
this.state.hasBuilds = false;
this.state.buildCount = 0;
localStorage.removeItem(LS_KEY_BUILDS);
localStorage.removeItem(LS_KEY_COMPARISONS);
if (this.lsEnabled) {
localStorage.removeItem(LS_KEY_BUILDS);
localStorage.removeItem(LS_KEY_COMPARISONS);
}
};
this.getInsurance = function () {
if (this.lsEnabled) {
return localStorage.getItem('insurance');
}
return null;
};
this.setInsurance = function (name) {
if (this.lsEnabled) {
return localStorage.setItem('insurance', name);
}
};
this.isEnabled = function() {
return this.lsEnabled;
};
}]);