1 files changed, 76 insertions, 0 deletions
diff --git a/src/app/helpers/helpers.ts b/src/app/helpers/helpers.ts
new file mode 100644
index 0000000..7c03dbd
--- /dev/null
+++ b/src/app/helpers/helpers.ts
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+import { FormArray, FormGroup } from '@angular/forms';
+
+export function isNotUndefined<T>(val: T | undefined): val is T {
+  return val !== undefined;
+}
+
+export function isNotNull<T>(val: T | null): val is T {
+  return val !== null;
+}
+
+export function markAsDirtyAndValidate(formGroup: FormGroup): void {
+  Object.values(formGroup.controls).forEach(control => {
+    control.markAsDirty();
+    control.updateValueAndValidity();
+  });
+}
+
+export function isNullOrUndefined(val: any): boolean {
+  return val === null || val === undefined;
+}
+
+export function isNotNullOrUndefined(val: any): boolean {
+  return val !== null && val !== undefined;
+}
+
+export function isNullOrUndefinedOrEmptyString(val: any): boolean {
+  return val === null || val === undefined || val === '';
+}
+
+export function isEmptyArray(array: any[]):boolean {
+  return !array.length
+}
+
+export function getRandomNumber(min: number, max: number) {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+export function areFormControlsValid(form: FormGroup): boolean {
+  const formControls = Object.keys(form.controls)
+    .map(key => form.controls[key])
+    .filter(control => !(control instanceof FormArray));
+  return formControls.find(control => control.invalid && (control.dirty || control.touched)) === undefined;
+}
+
+export function isString(value: any): boolean {
+  return typeof value === 'string' || value instanceof String;
+}
+
+export function resetSelectDefaultValue(cssSelector: string): void {
+  setTimeout(() => {
+    const element = document.querySelector(cssSelector);
+    if (element) {
+      //@ts-ignore
+      document.querySelector(cssSelector)?.selectedIndex = -1;
+    }
+  }, 0);
+}