feat(common): add Strings#isNonBlank()

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>
hyperledger · Oct 22, 2021 · 8d7d247 · 8d7d247
1 parent 28c97d3
commit 8d7d247
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/packages/cactus-common/src/main/typescript/strings.ts b/packages/cactus-common/src/main/typescript/strings.ts
@@ -9,10 +9,17 @@ export class Strings {
     return source.replace(new RegExp(searchValue, "gm"), replaceValue);
   }
 
-  public static isString(val: any): boolean {
+  public static isString(val: any): val is string {
     return typeof val === "string" || val instanceof String;
   }
 
+  public static isNonBlank(val: unknown): val is string {
+    if (!Strings.isString(val)) {
+      return false;
+    }
+    return val.trim().length > 0;
+  }
+
   public static dropNonPrintable(val: string): string {
     const fnTag = "Strings#dropNonPrintable()";
     Checks.truthy(Strings.isString(val), `${fnTag} Strings.isString(val)`);