SUPPORT-9169 : add NumberPrefixSuffixTextFormatter

frontend/src/ts/ervu_business_metrics/formatter/NumberPrefixSuffixTextFormatter.ts

@@ -0,0 +1,62 @@
+import {NotNull, TextFormatter, Visible} from "@webbpm/base-package";
+
+// A text formatter for integer values appending a prefix and/or suffix
+// depending on the last digit of the value
+export class NumberPrefixSuffixTextFormatter implements TextFormatter {
+
+  @NotNull()
+  public hasPrefix: boolean;
+
+  @Visible("hasPrefix == true")
+  @NotNull("hasPrefix == true")
+  public oneDigitPrefix: string;
+  @Visible("hasPrefix == true")
+  @NotNull("hasPrefix == true")
+  public otherDigitPrefix: string;
+
+  @NotNull()
+  public hasSuffix: boolean;
+
+  @Visible("hasSuffix == true")
+  @NotNull("hasSuffix == true")
+  public oneDigitSuffix: string;
+  @Visible("hasSuffix == true")
+  @NotNull("hasSuffix == true")
+  public fromTwoToFourDigitSuffix: string;
+  @Visible("hasSuffix == true")
+  @NotNull("hasSuffix == true")
+  public otherDigitSuffix: string;
+
+  private excludedNumbers: number[] = [11, 12, 13, 14];
+
+  format(value: string): string {
+    if (value) {
+      let number = Number.parseInt(value);
+      let lastDigit = Math.abs(number) % 10;
+      let lastDigits = Math.abs(number) % 100;
+      let prefix = "";
+
+      if (this.hasPrefix) {
+        prefix = (this.excludedNumbers.includes(lastDigits)
+                  ? this.oneDigitPrefix
+                  : lastDigit == 1
+                    ? this.oneDigitPrefix
+                    : this.otherDigitPrefix) + " ";
+      }
+      let suffix = "";
+
+      if (this.hasSuffix) {
+        suffix = " " + (this.excludedNumbers.includes(lastDigits)
+                        ? this.otherDigitSuffix
+                        : lastDigit == 1
+                          ? this.oneDigitSuffix
+                          : lastDigit > 1 && lastDigit < 5
+                            ? this.fromTwoToFourDigitSuffix
+                            : this.otherDigitSuffix);
+      }
+      return prefix + value + suffix;
+    }
+
+    return value;
+  }
+}