fix: cookie page guard should only use NgModal on browser side (#1148)

src/app/pages/cookies/cookies-page.guard.ts

@@ -1,4 +1,5 @@
-import { Injectable } from '@angular/core';
+import { isPlatformBrowser } from '@angular/common';
+import { Inject, Injectable, PLATFORM_ID } from '@angular/core';
 import { CanActivate, NavigationEnd, Router } from '@angular/router';
 import { NgbModal, NgbModalRef } from '@ng-bootstrap/ng-bootstrap';
 import { filter, first } from 'rxjs/operators';
@@ -9,32 +10,38 @@ import { CookiesModalComponent } from './cookies-modal/cookies-modal.component';
 export class CookiesPageGuard implements CanActivate {
   private currentDialog: NgbModalRef;
 
-  constructor(private modalService: NgbModal, private router: Router) {}
+  constructor(
+    @Inject(PLATFORM_ID) private platformId: string,
+    private modalService: NgbModal,
+    private router: Router
+  ) {}
 
   async canActivate() {
-    this.currentDialog = this.modalService.open(CookiesModalComponent, {
-      centered: true,
-      size: 'lg',
-      backdrop: 'static',
-    });
-
-    const cookiesModalComponent = this.currentDialog.componentInstance as CookiesModalComponent;
+    if (isPlatformBrowser(this.platformId)) {
+      this.currentDialog = this.modalService.open(CookiesModalComponent, {
+        centered: true,
+        size: 'lg',
+        backdrop: 'static',
+      });
 
-    // dialog closed
-    cookiesModalComponent.closeModal.pipe(first()).subscribe(() => {
-      this.currentDialog.dismiss();
-    });
+      const cookiesModalComponent = this.currentDialog.componentInstance as CookiesModalComponent;
 
-    // navigated away with link on dialog
-    this.router.events
-      .pipe(
-        filter(event => event instanceof NavigationEnd),
-        first()
-      )
-      .subscribe(() => {
+      // dialog closed
+      cookiesModalComponent.closeModal.pipe(first()).subscribe(() => {
         this.currentDialog.dismiss();
       });
 
-    return false;
+      // navigated away with link on dialog
+      this.router.events
+        .pipe(
+          filter(event => event instanceof NavigationEnd),
+          first()
+        )
+        .subscribe(() => {
+          this.currentDialog.dismiss();
+        });
+      return false;
+    }
+    return true;
   }
 }