Restrict angular imports (#5597)

* Refactor restricted imports eslint rule, add angular deps

* Move FormValidationErrorsService into libs/angular

* Remove angular decorators from configService

* Remove angular decorator from anonymousHubService

libs/angular/src/platform/abstractions/form-validation-errors.service.ts

@@ -0,0 +1,13 @@
+import { AbstractControl } from "@angular/forms";
+export interface AllValidationErrors {
+  controlName: string;
+  errorName: string;
+}
+
+export interface FormGroupControls {
+  [key: string]: AbstractControl;
+}
+
+export abstract class FormValidationErrorsService {
+  getFormValidationErrors: (controls: FormGroupControls) => AllValidationErrors[];
+}

libs/angular/src/platform/services/form-validation-errors.service.ts

@@ -0,0 +1,31 @@
+import { UntypedFormGroup, ValidationErrors } from "@angular/forms";
+
+import {
+  FormGroupControls,
+  FormValidationErrorsService as FormValidationErrorsAbstraction,
+  AllValidationErrors,
+} from "../abstractions/form-validation-errors.service";
+
+export class FormValidationErrorsService implements FormValidationErrorsAbstraction {
+  getFormValidationErrors(controls: FormGroupControls): AllValidationErrors[] {
+    let errors: AllValidationErrors[] = [];
+    Object.keys(controls).forEach((key) => {
+      const control = controls[key];
+      if (control instanceof UntypedFormGroup) {
+        errors = errors.concat(this.getFormValidationErrors(control.controls));
+      }
+
+      const controlErrors: ValidationErrors = controls[key].errors;
+      if (controlErrors !== null) {
+        Object.keys(controlErrors).forEach((keyError) => {
+          errors.push({
+            controlName: key,
+            errorName: keyError,
+          });
+        });
+      }
+    });
+
+    return errors;
+  }
+}