SUPPORT-9194: add script getting value depend on parent value last digit

frontend/src/ts/ervu_business_metrics/component/text/DigitDependentValue.ts

@@ -0,0 +1,49 @@
+import {AnalyticalScope, Behavior, NotNull, ObjectRef, Text} from "@webbpm/base-package";
+import {Subscription} from "rxjs";
+import {OnDestroy} from "@angular/core";
+
+@AnalyticalScope(Text)
+export class DigitDependentValue extends Behavior implements OnDestroy {
+
+  @ObjectRef()
+  @NotNull()
+  public parent: Text;
+
+  @NotNull()
+  public oneDigitValue: string;
+  @NotNull()
+  public fromTwoToFourDigitValue: string;
+  @NotNull()
+  public otherDigitValue: string;
+
+  private text: Text;
+  private subscription: Subscription;
+  private excludedNumbers: number[] = [11, 12, 13, 14];
+
+  initialize() {
+    super.initialize();
+    this.text = this.getScript(Text);
+    this.subscription = this.parent.valueChangeEvent.subscribe(value => {
+      if (value) {
+        this.text.setValue(this.getValueDependOn(value));
+      }
+    });
+  }
+
+  private getValueDependOn(parentValue: string) {
+    let number = Number.parseInt(parentValue);
+    let lastDigit = Math.abs(number) % 10;
+    let lastDigits = Math.abs(number) % 100;
+    return this.excludedNumbers.includes(lastDigits)
+            ? this.otherDigitValue
+            : lastDigit == 1
+              ? this.oneDigitValue
+              : lastDigit > 1 && lastDigit < 5
+                ? this.fromTwoToFourDigitValue
+                : this.otherDigitValue;
+  }
+
+  ngOnDestroy() {
+    this.subscription.unsubscribe();
+  }
+}