1 files changed, 20 insertions, 0 deletions
diff --git a/vid-webpack-master/src/app/shared/components/validators/numbersLettersUnderscore/numbersLettersUnderscore.validator.ts b/vid-webpack-master/src/app/shared/components/validators/numbersLettersUnderscore/numbersLettersUnderscore.validator.ts
new file mode 100644
index 000000000..418bdfc4d
--- /dev/null
+++ b/vid-webpack-master/src/app/shared/components/validators/numbersLettersUnderscore/numbersLettersUnderscore.validator.ts
@@ -0,0 +1,20 @@
+import { Injectable } from '@angular/core';
+import { isNullOrUndefined, isString } from 'util';
+
+@Injectable()
+export class NumbersLettersUnderscoreValidator {
+  static valid(control: any) {
+    let reg =  /^[a-zA-Z0-9_]*$/;
+
+    if(isNullOrUndefined(control)) return null;
+    let val = isString(control) ? control : control.value;
+    if (val === null) {
+      return {'invalidNumberLettersUnderscore': true};
+    }
+    if (reg.test(val)) {
+      return null;
+    } else {
+      return {'invalidNumberLettersUnderscore': true};
+    }
+  }
+}