[feature] add state backup before update

Author: zombieFox

package-lock.json

@@ -1,6 +1,6 @@
 {
 "name": "nightTab",
-"version": "5.44.0",
+"version": "5.45.0",
 "description": "A neutral new tab page accented with a chosen colour. Customise the layout, style, background and bookmarks in nightTab.",
 "main": "index.js",
 "scripts":{

package.json

@@ -2,6 +2,8 @@ var data = (function(){
 
 var_saveName="nightTab";
 
+var_backupName="nightTab-backup";
+
 varmod={};
 
 mod.import=function(){
@@ -42,6 +44,7 @@ var data = (function(){
 if(data){
 if(!("version"indata)||data.version!=version.get().number){
 console.log("data version "+data.version+" found less than current");
+mod.backup(data);
 data=update.run(data);
 mod.set(_saveName,JSON.stringify(data));
 }else{
@@ -53,6 +56,20 @@ var data = (function(){
 };
 };
 
+mod.backup=function(data){
+if(data){
+vardataBackup=JSON.parse(JSON.stringify(data));
+if(dataBackup.state.background.image.file){
+if(helper.checkIfValidString(dataBackup.state.background.image.file.data)){
+dataBackup.state.background.image.file.name="";
+dataBackup.state.background.image.file.data="";
+};
+};
+console.log("data version "+dataBackup.version+" backed up");
+mod.set(_backupName,JSON.stringify(dataBackup));
+};
+};
+
 mod.set=function(key,data){
 localStorage.setItem(key,data);
 };

src/js/data.js

@@ -1,6 +1,6 @@
 varversion=(function(){
 
-varcurrent="5.44.0";
+varcurrent="5.45.0";
 
 varname="Macabre Caterpillar";
 

src/js/version.js

@@ -2,7 +2,7 @@
 "name": "nightTab",
 "short_name": "nightTab",
 "description": "A neutral new tab page accented with a chosen colour. Customise the layout, style, background and bookmarks in nightTab.",
-"version": "5.44.0",
+"version": "5.45.0",
 "manifest_version": 2,
 "chrome_url_overrides":{
 "newtab": "index.html"