feat: Refactor settings handling in full layout and header components for improved theme management

Web/src/app/layouts/full/full.component.html

@@ -1,17 +1,17 @@
-<span [dir]="options.dir!">
+<span [dir]="settings.getOptions().dir">
   <mat-sidenav-container class="mainWrapper" autosize autoFocus [ngClass]="{
       'sidebarNav-mini':
-        options.sidenavCollapsed && options.navPos !== 'top' && !resView,
-      'sidebarNav-horizontal': options.horizontal,
-      cardBorder: options.cardBorder
+        settings.getOptions().sidenavCollapsed && settings.getOptions().navPos !== 'top' && !resView,
+      'sidebarNav-horizontal': settings.getOptions().horizontal,
+      cardBorder: settings.getOptions().cardBorder
     }">
     <!-- ============================================================== -->
     <!-- Vertical Sidebar -->
     <!-- ============================================================== -->
-    @if (!options.horizontal) {
+    @if (!settings.getOptions().horizontal) {
     <mat-sidenav #leftsidenav [mode]="isOver ? 'over' : 'side'" [opened]="
-        options.navPos === 'side' &&
-        options.sidenavOpened &&
+        settings.getOptions().navPos === 'side' &&
+        settings.getOptions().sidenavOpened &&
         !isOver &&
         !resView
       " (openedChange)="onSidenavOpenedChange($event)" (closedStart)="onSidenavClosedStart()" class="sidebarNav">
@@ -47,7 +47,7 @@
     <!-- horizontal Sidebar -->
     <!-- ============================================================== -->
     @if (resView) {
-    <mat-sidenav #leftsidenav [mode]="'over'" [opened]="options.sidenavOpened && !isTablet"
+    <mat-sidenav #leftsidenav [mode]="'over'" [opened]="settings.getOptions().sidenavOpened && !isTablet"
       (openedChange)="onSidenavOpenedChange($event)" (closedStart)="onSidenavClosedStart()" class="sidebarNav">
       <app-sidebar> </app-sidebar>
       <ng-scrollbar class="position-relative" style="height: 100%">
@@ -82,19 +82,19 @@
       <!-- ============================================================== -->
       <!-- VerticalHeader -->
       <!-- ============================================================== -->
-      @if (!options.horizontal) {
+      @if (!settings.getOptions().horizontal) {
       <app-header [showToggle]="!isOver" (toggleCollapsed)="toggleCollapsed()" (toggleMobileNav)="sidenav.toggle()"
         (toggleMobileFilterNav)="toggleFilterNav()" (optionsChange)="receiveOptions($event)"></app-header>
       } @else {
       <!-- horizontal header -->
       <app-horizontal-header (toggleMobileNav)="sidenav.toggle()" (toggleMobileFilterNav)="toggleFilterNav()"
-        (optionsChange)="receiveOptions($event)"></app-horizontal-header>
-      } @if(options.horizontal) {
+        ></app-horizontal-header>
+      } @if(settings.getOptions().horizontal) {
       <app-horizontal-sidebar></app-horizontal-sidebar>
       }
 
       <main class="pageWrapper" [ngClass]="{
-          maxWidth: options.boxed
+          maxWidth: settings.getOptions().boxed
         }">
         <app-breadcrumb></app-breadcrumb>
         <!-- ============================================================== -->
@@ -115,7 +115,7 @@
         <div>
           <div class="d-flex justify-content-between align-items-center">
             <div class="branding">
-              @if(options.theme === 'light') {
+              @if(settings.getOptions().theme === 'light') {
               <a href="/">
                 <img src="./assets/images/logos/dark-logo.svg" class="align-middle m-2" alt="logo" />
               </a>

Web/src/app/layouts/full/full.component.ts

@@ -1,5 +1,5 @@
 import { BreakpointObserver, MediaMatcher } from '@angular/cdk/layout';
-import { ChangeDetectorRef, Component, OnInit, ViewChild, ViewEncapsulation } from '@angular/core';
+import { ChangeDetectorRef, Component, effect, OnInit, ViewChild, ViewEncapsulation } from '@angular/core';
 import { Subscription } from 'rxjs';
 import { MatSidenav, MatSidenavContent } from '@angular/material/sidenav';
 import { CoreService } from '../../services/core.service';
@@ -71,7 +71,7 @@ export class FullComponent implements OnInit {
   resView = false;
   @ViewChild('content', { static: true }) content!: MatSidenavContent;
   //get options from service
-  options: AppSettings;
+  // options: AppSettings;
   private layoutChangesSubscription = Subscription.EMPTY;
   private isMobileScreen = false;
   private isContentWidthFixed = true;
@@ -190,29 +190,33 @@ export class FullComponent implements OnInit {
   ];
 
   constructor(
-    private settings: CoreService,
+    protected settings: CoreService,
     private mediaMatcher: MediaMatcher,
     private router: Router,
     private breakpointObserver: BreakpointObserver,
-    private navService: NavService, private cdr: ChangeDetectorRef
+    private navService: NavService,
+    private cdr: ChangeDetectorRef
   ) {
     this.htmlElement = document.querySelector('html')!;
-    this.options = this.settings.getOptions();
+    // this.options = this.settings.getOptions();
     this.layoutChangesSubscription = this.breakpointObserver
       .observe([MOBILE_VIEW, TABLET_VIEW, MONITOR_VIEW, BELOWMONITOR])
       .subscribe((state) => {
         // SidenavOpened must be reset true when layout changes
-        this.options.sidenavOpened = true;
+        this.settings.setOptions({ sidenavOpened: true });
+        // this.options.sidenavOpened = true;
         this.isMobileScreen = state.breakpoints[BELOWMONITOR];
-        if (this.options.sidenavCollapsed == false) {
-          this.options.sidenavCollapsed = state.breakpoints[TABLET_VIEW];
+        if (this.settings.getOptions().sidenavCollapsed == false) {
+          this.settings.setOptions({ sidenavCollapsed: state.breakpoints[TABLET_VIEW] });
         }
         this.isContentWidthFixed = state.breakpoints[MONITOR_VIEW];
         this.resView = state.breakpoints[BELOWMONITOR];
       });
 
-    // Initialize project theme with options
-    this.receiveOptions(this.options);
+    effect(() => {
+      const options = this.settings.getOptionsSignal()();
+      this.receiveOptions(options);
+    });
    
     // This is for scroll to top
     this.router.events
@@ -238,12 +242,12 @@ export class FullComponent implements OnInit {
 
   toggleCollapsed() {
     this.isContentWidthFixed = false;
-    this.options.sidenavCollapsed = !this.options.sidenavCollapsed;
+    this.settings.setOptions({ sidenavCollapsed: !this.settings.getOptions().sidenavCollapsed });
     this.resetCollapsedState();
   }
 
   resetCollapsedState(timer = 400) {
-    setTimeout(() => this.settings.setOptions(this.options), timer);
+    setTimeout(() => this.settings.setOptions(this.settings.getOptions()), timer);
   }
 
   onSidenavClosedStart() {
@@ -252,8 +256,7 @@ export class FullComponent implements OnInit {
 
   onSidenavOpenedChange(isOpened: boolean) {
     this.isCollapsedWidthFixed = !this.isOver;
-    this.options.sidenavOpened = isOpened;
-    this.settings.setOptions(this.options);
+    this.settings.setOptions({ sidenavOpened: isOpened });
   }
 
   receiveOptions(options: AppSettings): void {

Web/src/app/layouts/full/horizontal/header/header.component.html

@@ -101,7 +101,7 @@
       }
     </mat-menu>
 
-    @if(options.theme=='light'){
+    @if(settings.getOptions().theme=='light'){
     <button mat-icon-button aria-label="lightdark" class="d-flex justify-content-center" (click)="setlightDark('dark')">
       <i-tabler class="d-flex icon-22" [name]="'moon'"></i-tabler>
     </button>

Web/src/app/layouts/full/horizontal/header/header.component.ts

@@ -8,7 +8,6 @@ import { TablerIconsModule } from 'angular-tabler-icons';
 import { MaterialModule } from '../../../../material.module';
 import { BrandingComponent } from '../../vertical/sidebar/branding.component';
 import { FormsModule } from '@angular/forms';
-import { AppSettings } from '../../../../config';
 import { AuthenticationService } from '../../../../services/authentication.service';
 
 interface notifications {
@@ -74,19 +73,14 @@ export class AppHorizontalHeaderComponent {
     },
   ];
 
-  @Output() optionsChange = new EventEmitter<AppSettings>();
-
   constructor(
-    private settings: CoreService,
+    protected settings: CoreService,
     private vsidenav: CoreService,
     public dialog: MatDialog,
     private translate: TranslateService,
     public auth: AuthenticationService
-  ) {
-    // translate.setDefaultLang('en');
-    this.options = this.settings.getOptions();
-  }
-  options: AppSettings;
+  ) { }
+
 
   openDialog() {
     const dialogRef = this.dialog.open(AppHorizontalSearchDialogComponent);
@@ -96,13 +90,8 @@ export class AppHorizontalHeaderComponent {
     });
   }
 
-  private emitOptions() {
-    this.optionsChange.emit(this.options);
-  }
-
   setlightDark(theme: string) {
-    this.options.theme = theme;
-    this.emitOptions();
+    this.settings.setOptions({ theme: theme });
   }
 
   changeLanguage(lang: any): void {

Web/src/app/services/core.service.ts

@@ -5,13 +5,57 @@ import { AppSettings, defaults } from '../config';
   providedIn: 'root',
 })
 export class CoreService {
-  private optionsSignal = signal<AppSettings>(defaults);
+  // detect user's preferred color scheme (safe for SSR)
+  private static detectTheme(): 'dark' | 'light' {
+    // detect theme if set manually
+    const theme = localStorage.getItem('theme') as 'dark' | 'light' | null;
+    if (theme)
+      return theme;
+    else
+      try {
+        if (typeof window !== 'undefined' && window.matchMedia) {
+          return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+        }
+      } catch {
+        // ignore and fall through
+      }
+    return defaults.theme === 'dark' ? 'dark' : 'light';
+  }
+
+  // merge detected theme into initial defaults
+  private initialOptions = { ...defaults, theme: CoreService.detectTheme() as string } as AppSettings;
+
+  private optionsSignal = signal<AppSettings>(this.initialOptions);
+
+  constructor() {
+    // listen for changes to the OS/browser color-scheme and update settings
+    if (typeof window !== 'undefined' && window.matchMedia) {
+      const mq = window.matchMedia('(prefers-color-scheme: dark)');
+      const handler = (e: MediaQueryListEvent) => {
+        this.setOptions({ theme: e.matches ? 'dark' : 'light' });
+      };
+      if (typeof mq.addEventListener === 'function') {
+        mq.addEventListener('change', handler);
+      } else if (typeof (mq as any).addListener === 'function') {
+        // fallback for older browsers
+        (mq as any).addListener(handler);
+      }
+    }
+  }
 
   getOptions() {
     return this.optionsSignal();
   }
 
+  getOptionsSignal() {
+    return this.optionsSignal;
+  }
+
   setOptions(options: Partial<AppSettings>) {
+    // if theme is specified, persist to localStorage
+    if (options.theme !== null && options.theme !== undefined)
+      localStorage.setItem('theme', options.theme);
+
     this.optionsSignal.update((current) => ({
       ...current,
       ...options,