feat: add standalone validator

src/app/core/validators/data-offer-form-validators.ts

@@ -0,0 +1,58 @@
+import {Injectable} from '@angular/core';
+import {AbstractControl, ValidationErrors, ValidatorFn} from '@angular/forms';
+import {Observable, of} from 'rxjs';
+import {catchError, map} from 'rxjs/operators';
+import {IdAvailabilityResponse} from '@sovity.de/edc-client';
+import {EdcApiService} from '../services/api/edc-api.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class DataOfferFormValidators {
+  constructor(private edcApiService: EdcApiService) {}
+
+  policyIdExistsValidator: ValidatorFn = (
+    control: AbstractControl,
+  ): Observable<ValidationErrors | null> => {
+    const value = control.value;
+    if (value) {
+      return this.edcApiService.isPolicyIdAvailable(value).pipe(
+        catchError(() =>
+          of<IdAvailabilityResponse>({id: value, available: false}),
+        ),
+        map((it) => (it.available ? null : {idAlreadyExists: true})),
+      );
+    }
+    return of(null);
+  };
+
+  contractDefinitionIdExistsValidator: ValidatorFn = (
+    control: AbstractControl,
+  ): Observable<ValidationErrors | null> => {
+    const value = control.value;
+    if (value) {
+      return this.edcApiService.isContractDefinitionIdAvailable(value).pipe(
+        catchError(() =>
+          of<IdAvailabilityResponse>({id: value, available: false}),
+        ),
+        map((it) => (it.available ? null : {idAlreadyExists: true})),
+      );
+    }
+    return of(null);
+  };
+
+  assetIdExistsValidator: ValidatorFn = (
+    control: AbstractControl,
+  ): Observable<ValidationErrors | null> => {
+    const value = control.value;
+    if (value) {
+      return this.edcApiService.isAssetIdAvailable(value).pipe(
+        catchError(() =>
+          of<IdAvailabilityResponse>({id: value, available: false}),
+        ),
+        map((it) => (it.available ? null : {idAlreadyExists: true})),
+      );
+    }
+    return of(null);
+  };
+}

src/app/routes/connector-ui/contract-definition-page/contract-definition-editor-dialog/contract-definition-editor-dialog-form.ts

@@ -1,7 +1,7 @@
 import {Injectable} from '@angular/core';
 import {FormBuilder, FormGroup, Validators} from '@angular/forms';
 import {PolicyDefinitionDto} from '@sovity.de/edc-client';
-import {EditAssetFormValidators} from 'src/app/component-library/edit-asset-form/edit-asset-form/form/edit-asset-form-validators';
+import {DataOfferFormValidators} from 'src/app/core/validators/data-offer-form-validators';
 import {UiAssetMapped} from '../../../../core/services/models/ui-asset-mapped';
 import {noWhitespacesOrColonsValidator} from '../../../../core/validators/no-whitespaces-or-colons-validator';
 import {
@@ -25,15 +25,15 @@ export class ContractDefinitionEditorDialogForm {
 
   constructor(
     private formBuilder: FormBuilder,
-    private validators: EditAssetFormValidators,
+    private validators: DataOfferFormValidators,
   ) {}
 
   buildFormGroup(): FormGroup<ContractDefinitionEditorDialogFormModel> {
     return this.formBuilder.nonNullable.group({
       id: [
         '',
         [Validators.required, noWhitespacesOrColonsValidator],
-        [this.validators.isValidDataOfferId()],
+        [this.validators.contractDefinitionIdExistsValidator],
       ],
       accessPolicy: [null as PolicyDefinitionDto | null, Validators.required],
       contractPolicy: [null as PolicyDefinitionDto | null, Validators.required],

src/app/routes/connector-ui/contract-definition-page/contract-definition-editor-dialog/contract-definition-editor-dialog.component.html

@@ -12,6 +12,9 @@ <h1 mat-dialog-title>Publish New Data Offer</h1>
       <mat-error *ngIf="ctrl.invalid && ctrl.errors?.pattern">{{
         validationMessages.invalidWhitespacesOrColonsMessage
       }}</mat-error>
+      <mat-error *ngIf="ctrl.invalid && ctrl.errors?.idAlreadyExists">
+        {{ validationMessages.idExistsErrorMessage }}
+      </mat-error>
     </mat-form-field>
 
     <!-- Access Policy -->