59334: edit item metadata finished

src/app/shared/utils/in-list-validator.directive.ts

@@ -0,0 +1,32 @@
+import { Directive, Input } from '@angular/core';
+import { FormControl, NG_VALIDATORS, ValidationErrors, Validator } from '@angular/forms';
+import { inListValidator } from './validator.functions';
+
+/**
+ * Directive for validating if a ngModel value is in a given list
+ */
+@Directive({
+  selector: '[ngModel][dsInListValidator]',
+  // We add our directive to the list of existing validators
+  providers: [
+    { provide: NG_VALIDATORS, useExisting: InListValidator, multi: true }
+  ]
+})
+export class InListValidator implements Validator {
+  /**
+   * The list to look in
+   */
+  @Input()
+  dsInListValidator: string[];
+
+  /**
+   * The function that checks if the form control's value is currently valid
+   * @param c The FormControl
+   */
+  validate(c: FormControl): ValidationErrors | null {
+    if (this.dsInListValidator !== null) {
+      return inListValidator(this.dsInListValidator)(c);
+    }
+    return null;
+  }
+}

src/app/shared/utils/validator.functions.ts

@@ -1,7 +1,11 @@
 import { AbstractControl, ValidatorFn } from '@angular/forms';
 
+/**
+ * Returns a validator function to check if the control's value is in a given list
+ * @param list The list to look in
+ */
 export function inListValidator(list: string[]): ValidatorFn {
   return (control: AbstractControl): {[key: string]: any} | null => {
-    const contains = list.indexOf(control.value) > 0;
+    const contains = list.indexOf(control.value) > -1;
     return contains ? null : {inList: {value: control.value}}  };
 }