Add feature flag

apps/api/src/app/info/info.service.ts

@@ -28,6 +28,10 @@ export class InfoService {
 
     const globalPermissions: string[] = [];
 
+    if (this.configurationService.get('ENABLE_FEATURE_BLOG')) {
+      globalPermissions.push(permissions.enableBlog);
+    }
+
     if (this.configurationService.get('ENABLE_FEATURE_IMPORT')) {
       globalPermissions.push(permissions.enableImport);
     }

apps/api/src/services/configuration.service.ts

@@ -15,6 +15,7 @@ export class ConfigurationService {
       ALPHA_VANTAGE_API_KEY: str({ default: '' }),
       CACHE_TTL: num({ default: 1 }),
       DATA_SOURCES: json({ default: JSON.stringify([DataSource.YAHOO]) }),
+      ENABLE_FEATURE_BLOG: bool({ default: false }),
       ENABLE_FEATURE_CUSTOM_SYMBOLS: bool({ default: false }),
       ENABLE_FEATURE_FEAR_AND_GREED_INDEX: bool({ default: false }),
       ENABLE_FEATURE_IMPORT: bool({ default: !environment.production }),

apps/api/src/services/interfaces/environment.interface.ts

@@ -5,6 +5,7 @@ export interface Environment extends CleanedEnvAccessors {
   ALPHA_VANTAGE_API_KEY: string;
   CACHE_TTL: number;
   DATA_SOURCES: string | string[]; // string is not correct, error in envalid?
+  ENABLE_FEATURE_BLOG: boolean;
   ENABLE_FEATURE_CUSTOM_SYMBOLS: boolean;
   ENABLE_FEATURE_FEAR_AND_GREED_INDEX: boolean;
   ENABLE_FEATURE_IMPORT: boolean;

apps/client/src/app/pages/about/about-page.component.ts

@@ -17,6 +17,7 @@ import { environment } from '../../../environments/environment';
 })
 export class AboutPageComponent implements OnDestroy, OnInit {
   public baseCurrency = baseCurrency;
+  public hasPermissionForBlog: boolean;
   public hasPermissionForStatistics: boolean;
   public hasPermissionForSubscription: boolean;
   public isLoggedIn: boolean;
@@ -41,6 +42,12 @@ export class AboutPageComponent implements OnDestroy, OnInit {
    */
   public ngOnInit() {
     const { globalPermissions, statistics } = this.dataService.fetchInfo();
+
+    this.hasPermissionForBlog = hasPermission(
+      globalPermissions,
+      permissions.enableBlog
+    );
+
     this.hasPermissionForStatistics = hasPermission(
       globalPermissions,
       permissions.enableStatistics

apps/client/src/app/pages/about/about-page.html

@@ -104,7 +104,7 @@
     </div>
   </div>
 
-  <div class="mb-5 row">
+  <div *ngIf="hasPermissionForBlog" class="mb-5 row">
     <div class="col">
       <h3 class="mb-3 text-center" i18n>Blog</h3>
       <mat-card class="blog-container">

libs/common/src/lib/permissions.ts

@@ -15,6 +15,7 @@ export const permissions = {
   deleteOrder: 'deleteOrder',
   deleteUser: 'deleteUser',
   enableImport: 'enableImport',
+  enableBlog: 'enableBlog',
   enableSocialLogin: 'enableSocialLogin',
   enableStatistics: 'enableStatistics',
   enableSubscription: 'enableSubscription',