add option into setting

src/setting.ts

@@ -1,11 +1,38 @@
-import { readFileSync } from 'fs';
+import { Settings } from '@material-ui/icons';
+import { readFileSync, writeFileSync } from 'fs';
 
 export type Setting = {
-    path: string[]
+    path: string[],
+    initial_admin_password:string,
+    localmode: boolean,
+    guest: boolean,
+}
+const default_setting:Setting = {
+    path:[],
+    initial_admin_password:"admin",
+    localmode: true,
+    guest:false,
 }
 let setting: null|Setting = null;
+const setEmptyToDefault = (target:any,default_table:any)=>{
+    let diff_occur = false;
+    for(const key in default_table){
+        if(key === undefined || key in target){
+            continue;
+        }
+        target[key] = default_table[key];
+        diff_occur = true;
+    }
+    return diff_occur;
+}
+
 export const read_setting_from_file = ()=>{
-    return JSON.parse(readFileSync("settings.json",{encoding:"utf8"})) as Setting;
+    let ret =  JSON.parse(readFileSync("settings.json",{encoding:"utf8"})) as Setting;
+    const diff_occur = setEmptyToDefault(ret,default_setting);
+    if(diff_occur){
+        writeFileSync("settings.json",JSON.stringify(ret));
+    }
+    return ret;
 }
 export function get_setting():Setting{
     if(setting === null){