[PM-1400] Update IconComponent to use OnPush ChangeDetection (#5181)

* Add disableFavicon$ to stateService

* Change IconComponent's ChangeDetectionStrategy and use disableFavicon$ observable

* Only get first result from disableFavicon observable

* Move disabledFavicon$ to SettingsService

* Update usage of disableFavicon to use SettingsService

* Remove getting and setting of disabledFavicon on login

* Settings service observable adjustments

* Fix for popup initially having a null value for the disableFavicon setting in settingsService

* Move disabledFavicon$ subscription to ngOnInit

* feat: experiment with observables

* Remove SettingsService from browser app component

* Fix storybook changes

* Update apps/web/src/app/vault/components/vault-items/vault-items.stories.ts

Co-authored-by: Andreas Coroiu <acoroiu@bitwarden.com>

* Fix mock function signature

---------

Co-authored-by: Andreas Coroiu <andreas.coroiu@gmail.com>
Co-authored-by: Andreas Coroiu <acoroiu@bitwarden.com>

libs/angular/src/auth/components/lock.component.ts

@@ -260,8 +260,6 @@ export class LockComponent implements OnInit, OnDestroy {
 
   private async doContinue(evaluatePasswordAfterUnlock: boolean) {
     await this.stateService.setEverBeenUnlocked(true);
-    const disableFavicon = await this.stateService.getDisableFavicon();
-    await this.stateService.setDisableFavicon(!!disableFavicon);
     this.messagingService.send("unlocked");
 
     if (evaluatePasswordAfterUnlock) {

libs/angular/src/auth/components/login.component.ts

@@ -152,8 +152,6 @@ export class LoginComponent extends CaptchaProtectedComponent implements OnInit
           this.router.navigate([this.forcePasswordResetRoute]);
         }
       } else {
-        const disableFavicon = await this.stateService.getDisableFavicon();
-        await this.stateService.setDisableFavicon(!!disableFavicon);
         if (this.onSuccessfulLogin != null) {
           this.onSuccessfulLogin();
         }

libs/angular/src/auth/components/sso.component.ts

@@ -212,8 +212,6 @@ export class SsoComponent {
           this.router.navigate([this.forcePasswordResetRoute]);
         }
       } else {
-        const disableFavicon = await this.stateService.getDisableFavicon();
-        await this.stateService.setDisableFavicon(!!disableFavicon);
         if (this.onSuccessfulLogin != null) {
           await this.onSuccessfulLogin();
         }

libs/angular/src/auth/components/two-factor.component.ts

@@ -197,8 +197,6 @@ export class TwoFactorComponent extends CaptchaProtectedComponent implements OnI
       this.captchaToken
     );
     const response: AuthResult = await this.formPromise;
-    const disableFavicon = await this.stateService.getDisableFavicon();
-    await this.stateService.setDisableFavicon(!!disableFavicon);
     if (this.handleCaptchaRequired(response)) {
       return;
     }

libs/angular/src/vault/components/icon.component.html

@@ -1,11 +1,16 @@
 <div class="icon" aria-hidden="true">
-  <img
-    [src]="image"
-    appFallbackSrc="{{ fallbackImage }}"
-    *ngIf="imageEnabled && image"
-    alt=""
-    decoding="async"
-    loading="lazy"
-  />
-  <i class="tw-text-muted bwi bwi-lg {{ icon }}" *ngIf="!imageEnabled || !image"></i>
+  <ng-container *ngIf="data$ | async as data">
+    <img
+      [src]="data.image"
+      [appFallbackSrc]="data.fallbackImage"
+      *ngIf="data.imageEnabled && data.image"
+      alt=""
+      decoding="async"
+      loading="lazy"
+    />
+    <i
+      class="tw-text-muted bwi bwi-lg {{ data.icon }}"
+      *ngIf="!data.imageEnabled || !data.image"
+    ></i>
+  </ng-container>
 </div>

libs/angular/src/vault/components/icon.component.ts

@@ -1,7 +1,15 @@
-import { Component, Input, OnChanges } from "@angular/core";
+import { ChangeDetectionStrategy, Component, Input, OnInit } from "@angular/core";
+import {
+  BehaviorSubject,
+  combineLatest,
+  distinctUntilChanged,
+  filter,
+  map,
+  Observable,
+} from "rxjs";
 
 import { EnvironmentService } from "@bitwarden/common/abstractions/environment.service";
-import { StateService } from "@bitwarden/common/abstractions/state.service";
+import { SettingsService } from "@bitwarden/common/abstractions/settings.service";
 import { Utils } from "@bitwarden/common/misc/utils";
 import { CipherType } from "@bitwarden/common/vault/enums/cipher-type";
 import { CipherView } from "@bitwarden/common/vault/models/view/cipher.view";
@@ -25,89 +33,101 @@ const cardIcons: Record<string, string> = {
 @Component({
   selector: "app-vault-icon",
   templateUrl: "icon.component.html",
+  changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class IconComponent implements OnChanges {
-  @Input() cipher: CipherView;
-  icon: string;
-  image: string;
-  fallbackImage: string;
-  imageEnabled: boolean;
-
-  private iconsUrl: string;
-
-  constructor(environmentService: EnvironmentService, private stateService: StateService) {
-    this.iconsUrl = environmentService.getIconsUrl();
+export class IconComponent implements OnInit {
+  @Input()
+  set cipher(value: CipherView) {
+    this.cipher$.next(value);
   }
 
-  async ngOnChanges() {
-    // Components may be re-used when using cdk-virtual-scroll. Which puts the component in a weird state,
-    // to avoid this we reset all state variables.
-    this.image = null;
-    this.fallbackImage = null;
-    this.imageEnabled = !(await this.stateService.getDisableFavicon());
-    this.load();
-  }
+  protected data$: Observable<{
+    imageEnabled: boolean;
+    image?: string;
+    fallbackImage: string;
+    icon?: string;
+  }>;
 
-  protected load() {
-    switch (this.cipher.type) {
-      case CipherType.Login:
-        this.icon = "bwi-globe";
-        this.setLoginIcon();
-        break;
-      case CipherType.SecureNote:
-        this.icon = "bwi-sticky-note";
-        break;
-      case CipherType.Card:
-        this.icon = "bwi-credit-card";
-        this.setCardIcon();
-        break;
-      case CipherType.Identity:
-        this.icon = "bwi-id-card";
-        break;
-      default:
-        break;
-    }
-  }
+  private cipher$ = new BehaviorSubject<CipherView>(undefined);
 
-  private setLoginIcon() {
-    if (this.cipher.login.uri) {
-      let hostnameUri = this.cipher.login.uri;
-      let isWebsite = false;
+  constructor(
+    private environmentService: EnvironmentService,
+    private settingsService: SettingsService
+  ) {}
 
-      if (hostnameUri.indexOf("androidapp://") === 0) {
-        this.icon = "bwi-android";
-        this.image = null;
-      } else if (hostnameUri.indexOf("iosapp://") === 0) {
-        this.icon = "bwi-apple";
-        this.image = null;
-      } else if (
-        this.imageEnabled &&
-        hostnameUri.indexOf("://") === -1 &&
-        hostnameUri.indexOf(".") > -1
-      ) {
-        hostnameUri = "http://" + hostnameUri;
-        isWebsite = true;
-      } else if (this.imageEnabled) {
-        isWebsite = hostnameUri.indexOf("http") === 0 && hostnameUri.indexOf(".") > -1;
-      }
+  async ngOnInit() {
+    const iconsUrl = this.environmentService.getIconsUrl();
 
-      if (this.imageEnabled && isWebsite) {
-        try {
-          this.image = this.iconsUrl + "/" + Utils.getHostname(hostnameUri) + "/icon.png";
-          this.fallbackImage = "images/bwi-globe.png";
-        } catch (e) {
-          // Ignore error since the fallback icon will be shown if image is null.
+    this.data$ = combineLatest([
+      this.settingsService.disableFavicon$.pipe(distinctUntilChanged()),
+      this.cipher$.pipe(filter((c) => c !== undefined)),
+    ]).pipe(
+      map(([disableFavicon, cipher]) => {
+        const imageEnabled = !disableFavicon;
+        let image = undefined;
+        let fallbackImage = "";
+        let icon = undefined;
+
+        switch (cipher.type) {
+          case CipherType.Login:
+            icon = "bwi-globe";
+
+            if (cipher.login.uri) {
+              let hostnameUri = cipher.login.uri;
+              let isWebsite = false;
+
+              if (hostnameUri.indexOf("androidapp://") === 0) {
+                icon = "bwi-android";
+                image = null;
+              } else if (hostnameUri.indexOf("iosapp://") === 0) {
+                icon = "bwi-apple";
+                image = null;
+              } else if (
+                imageEnabled &&
+                hostnameUri.indexOf("://") === -1 &&
+                hostnameUri.indexOf(".") > -1
+              ) {
+                hostnameUri = "http://" + hostnameUri;
+                isWebsite = true;
+              } else if (imageEnabled) {
+                isWebsite = hostnameUri.indexOf("http") === 0 && hostnameUri.indexOf(".") > -1;
+              }
+
+              if (imageEnabled && isWebsite) {
+                try {
+                  image = iconsUrl + "/" + Utils.getHostname(hostnameUri) + "/icon.png";
+                  fallbackImage = "images/bwi-globe.png";
+                } catch (e) {
+                  // Ignore error since the fallback icon will be shown if image is null.
+                }
+              }
+            } else {
+              image = null;
+            }
+            break;
+          case CipherType.SecureNote:
+            icon = "bwi-sticky-note";
+            break;
+          case CipherType.Card:
+            icon = "bwi-credit-card";
+            if (imageEnabled && cipher.card.brand in cardIcons) {
+              icon = "credit-card-icon " + cardIcons[cipher.card.brand];
+            }
+            break;
+          case CipherType.Identity:
+            icon = "bwi-id-card";
+            break;
+          default:
+            break;
         }
-      }
-    } else {
-      this.image = null;
-    }
-  }
 
-  private setCardIcon() {
-    const brand = this.cipher.card.brand;
-    if (this.imageEnabled && brand in cardIcons) {
-      this.icon = "credit-card-icon " + cardIcons[brand];
-    }
+        return {
+          imageEnabled,
+          image,
+          fallbackImage,
+          icon,
+        };
+      })
+    );
   }
 }