Add Dart Nik Identifier Class

src/Dart/nik_identifier.dart

@@ -0,0 +1,46 @@
+Map<int, String> province = {
+  11: "ACEH",
+  12: "SUMATERA UTARA",
+  13: "SUMATERA BARAT",
+  14: "RIAU",
+  15: "JAMBI",
+  16: "SUMATERA SELATAN",
+  17: "BENGKULU",
+  18: "LAMPUNG",
+  19: "KEPULAUAN BANGKA BELITUNG",
+  21: "KEPULAUAN RIAU",
+  31: "DKI JAKARTA",
+  32: "JAWA BARAT",
+  33: "JAWA TENGAH",
+  34: "DI YOGYAKARTA",
+  35: "JAWA TIMUR",
+  36: "BANTEN",
+  51: "BALI",
+  52: "NUSA TENGGARA BARAT",
+  53: "NUSA TENGGARA TIMUR",
+  61: "KALIMANTAN BARAT",
+  62: "KALIMANTAN TENGAH",
+  63: "KALIMANTAN SELATAN",
+  64: "KALIMANTAN TIMUR",
+  71: "SULAWESI UTARA",
+  73: "SULAWESI SELATAN",
+  74: "SULAWESI TENGGARA",
+  75: "GORONTALO",
+  76: "SULAWESI BARAT",
+  81: "MALUKU",
+  82: "MALUKU UTARA",
+  94: "PAPUA",
+  91: "PAPUA BARAT",
+  72: "SULAWESI TENGAH",
+  65: "KALIMANTAN UTARA",
+};
+
+class NikIdentifier {
+  static String getProvince(String identityNumber) {
+    return province[identityNumber.substring(0, 1)].toString();
+  }
+
+  static String getBirthDate(String identityNumber) {
+    return identityNumber.substring(6, 12);
+  }
+}