Merge pull request #31 from MartinAskestad/is-future-date

Is future date

README.md

@@ -18,10 +18,10 @@ Install with npm
 var swedenNationalId = require("sweden-national-id");
 
 // National id number
-swedenNationalId.parse("850823-6463"); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6463' }
+swedenNationalId.parse("850823-6463"); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6463', isFutureDate: false, isUnder18: false }
 
 // Co-ordination number
-swedenNationalId.parse("850863-6464"); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6460' }
+swedenNationalId.parse("850863-6464"); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6460', isFutureDate: false, isUnder18: false }
 
 // Corporate id number
 swedenNationalId.parse("556036-0793"); // { nationalIdNumber: "556036-0793", numberType: 5 }
@@ -38,16 +38,16 @@ swedenNationalId.parse("850823-6464"); // null
 const { parse } from 'sweden-national-id';
 
 // National id number
-parse('850823-6463'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6463' }
+parse('850823-6463'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6463', isFutureDate: false, isUnder18: false }
 
 // Co-ordination number
-parse('850863-6464'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850863-6460' }
+parse('850863-6464'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850863-6460', isFutureDate: false, isUnder18: false }
 
 // Person over 100 years
-parse('850863+6464'); // { dateOfBirth: 1885-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823+6460' }
+parse('850863+6464'); // { dateOfBirth: 1885-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823+6460', isFutureDate: false, isUnder18: false }
 
 // 12-digit format of id number
-parse('198508636460'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6460' }
+parse('198508636460'); // { dateOfBirth: 1985-08-23T00:00:00.000Z, gender: 0, nationalIdNumber: '850823-6460', isFutureDate: false, isUnder18: false }
 
 // Corporate id number
 parse('556036-0793'); // { nationalIdNumber: "556036-0793", numberType: 5 }

src/national-id-number.test.ts

@@ -1,10 +1,10 @@
 import test from "ava";
 import {
-    CorporateIdNumberType,
-    Gender,
-    NationalIdNumber,
-    parse,
-    PersonalNumberType
+  CorporateIdNumberType,
+  Gender,
+  NationalIdNumber,
+  parse,
+  PersonalNumberType,
 } from "./national-id-number";
 import { parseDateOfBirth } from "./parse-date-of-birth";
 
@@ -20,6 +20,8 @@ test("should parse a valid 10-digit national id number", (t) => {
     dateOfBirth: new Date("1985-08-23 00:00:00"),
     gender: Gender.F,
     nationalIdNumber: "850823-6463",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.personalNumber,
   };
 
@@ -32,6 +34,8 @@ test("should parse a valid 11-digit national id number of someone older than 100
     dateOfBirth: parseDateOfBirth("18850823"),
     gender: Gender.F,
     nationalIdNumber: "850823+6463",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.personalNumber,
   };
   t.deepEqual(res, expected);
@@ -42,6 +46,8 @@ test("should parse a valid 11-digit national id number", (t) => {
     dateOfBirth: new Date("1985-08-23 00:00:00"),
     gender: Gender.F,
     nationalIdNumber: "850823-6463",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.personalNumber,
   };
   t.deepEqual(parse("850823-6463"), expected);
@@ -52,6 +58,8 @@ test("should parse a valid national 12-digit id number", (t) => {
     dateOfBirth: new Date("1985-08-23 00:00:00"),
     gender: Gender.F,
     nationalIdNumber: "850823-6463",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.personalNumber,
   };
   t.deepEqual(parse("198508236463"), expected);
@@ -62,6 +70,8 @@ test("should parse a valid co-ordination number", (t) => {
     dateOfBirth: new Date("1985-08-23 00:00:00"),
     gender: Gender.F,
     nationalIdNumber: "850883-6460",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.coOrdinationNumber,
   };
   t.deepEqual(parse("850883-6460"), expected);
@@ -72,6 +82,8 @@ test("should identify the gender of a national id number as Female", (t) => {
     dateOfBirth: new Date("1985-08-23 00:00:00"),
     gender: Gender.F,
     nationalIdNumber: "850883-6460",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.coOrdinationNumber,
   };
   t.deepEqual(parse("850883-6460"), expected);
@@ -82,6 +94,8 @@ test("should identify the gender of a national id number as Male", (t) => {
     dateOfBirth: new Date("1979-11-14 00:00:00"),
     gender: Gender.M,
     nationalIdNumber: "791114-2011",
+    isFutureDate: false,
+    isUnder18: false,
     numberType: PersonalNumberType.personalNumber,
   };
   t.deepEqual(parse("791114-2011"), expected);
@@ -110,7 +124,7 @@ test("should identify a corporate id number", (t) => {
   t.deepEqual(parse("556036-0793"), expected);
 });
 
-test("should identify a number as a \"council\" number", (t) => {
+test('should identify a number as a "council" number', (t) => {
   const expected: NationalIdNumber = {
     nationalIdNumber: "212000-0142",
     numberType: CorporateIdNumberType.council,
@@ -125,4 +139,3 @@ test("should identify a corporate id number with a leading 16", (t) => {
   };
   t.deepEqual(parse("165560360793"), expected);
 });
-

src/national-id-number.ts

@@ -1,20 +1,24 @@
 import { format } from "./format";
 import { validate } from "./luhn";
-import { parseDateOfBirth } from "./parse-date-of-birth";
+import {
+  isFutureDate as _isFutureDate,
+  isUnder18 as _isUnder18,
+  parseDateOfBirth,
+} from "./parse-date-of-birth";
 import { toFourDigitYear } from "./to-four-digit-year";
 
 /**
  * Represents the legal gender of the personal-id-number.
  */
 export enum Gender {
   F,
-  M
+  M,
 }
 
 /**
  * Represents the type of company of a company-id number.
  */
-export enum CorporateIdNumberType {
+export const enum CorporateIdNumberType {
   /**
    * An estate of a deceased person. In Swedish, dödsbo.
    */
@@ -46,36 +50,49 @@ export enum CorporateIdNumberType {
   /**
    * A trading partnership.
    */
-  tradingPartnership = 9 // Handelsbolag, kommanditbolag, enkelt bolag
+  tradingPartnership = 9, // Handelsbolag, kommanditbolag, enkelt bolag
 }
 
 /**
  * The type of id number.
  */
-export enum PersonalNumberType {
+export const enum PersonalNumberType {
   /**
    * The national id number of a private individual.
    */
   personalNumber = 10,
   /**
    * The id number of a corporation of council.
    */
-  coOrdinationNumber
+  coOrdinationNumber,
 }
 
-/**
- * The details of the number that has been parsed.
+/*
+ * Details of a personal id number.
  */
-export interface NationalIdNumber {
+export type PersonalIdNumber = {
   /** The date of birth of a person if number is a personal or co-ordination number otherwise undefined. */
   dateOfBirth?: Date;
   /** The gender of the person if the number is a personal or co-ordination number otherwise undefined. */
   gender?: Gender;
   /** The number formatted according to official formating rules. */
   nationalIdNumber: string;
-  /** The type of number, a personal co-ordination or corporate id number. */
-  numberType: PersonalNumberType | CorporateIdNumberType;
-}
+  isFutureDate: boolean;
+  isUnder18: boolean;
+  numberType: PersonalNumberType;
+};
+
+/**
+ * Details of a corporate id number.
+ */
+export type CorporateIdNumber = {
+  nationalIdNumber: string;
+  numberType: CorporateIdNumberType;
+};
+/**
+ * The details of the number that has been parsed.
+ */
+export type NationalIdNumber = PersonalIdNumber | CorporateIdNumber;
 
 /**
  * Parses a string representing a Swedish National Id number and returns details about it.
@@ -99,11 +116,11 @@ export function parse(value: string): NationalIdNumber | null {
   if (+nationalIdNumber.substr(2, 2) >= 20) {
     return {
       nationalIdNumber: nationalIdNumber.replace("+", "-"),
-      numberType: +nationalIdNumber[0]
+      numberType: +nationalIdNumber[0],
     };
   }
 
-  if (isNaN((dateOfBirth as unknown) as number)) {
+  if (isNaN(dateOfBirth as unknown as number)) {
     return null;
   }
   if (hasPlus) {
@@ -114,10 +131,14 @@ export function parse(value: string): NationalIdNumber | null {
     +nationalIdNumber.substr(4, 2) > 60
       ? PersonalNumberType.coOrdinationNumber
       : PersonalNumberType.personalNumber;
+  const isFutureDate = _isFutureDate(dateOfBirth);
+  const isUnder18 = _isUnder18(dateOfBirth);
   return {
     dateOfBirth,
     gender,
     nationalIdNumber,
-    numberType
+    numberType,
+    isFutureDate,
+    isUnder18,
   };
 }

src/parse-date-of-birth.test.ts

@@ -1,5 +1,9 @@
 import test from "ava";
-import { parseDateOfBirth } from "./parse-date-of-birth";
+import {
+  isFutureDate,
+  isUnder18,
+  parseDateOfBirth,
+} from "./parse-date-of-birth";
 
 test("should parse the date of birth from a personal number", (t) => {
   t.deepEqual(parseDateOfBirth("19850823"), new Date("1985-08-23 00:00:00"));
@@ -9,6 +13,20 @@ test("should parse the date of birth from a co-ordination number", (t) => {
   t.deepEqual(parseDateOfBirth("19850883"), new Date("1985-08-23 00:00:00"));
 });
 
-test("should parse the date of birth from someone older than 100 years", t => {
-  t.deepEqual(parseDateOfBirth("18850823"), new Date("1885-08-23 00:00:00"))
+test("should parse the date of birth from someone older than 100 years", (t) => {
+  t.deepEqual(parseDateOfBirth("18850823"), new Date("1885-08-23 00:00:00"));
+});
+
+test("should return true if date of birth is in the future", (t) => {
+  const dateOfBirth = new Date();
+  const today = new Date();
+  dateOfBirth.setFullYear(today.getFullYear() + 1);
+  t.true(isFutureDate(dateOfBirth));
+});
+
+test("should return true if date of birth is more recent that 18 years", (t) => {
+  const today = new Date();
+  const dateOfBirth = new Date();
+  dateOfBirth.setFullYear(today.getFullYear() - 12);
+  t.true(isUnder18(dateOfBirth));
 });

src/parse-date-of-birth.ts

@@ -4,14 +4,32 @@ export function parseDateOfBirth(dateOfBirth: string): Date {
   const year = +dateOfBirth.substr(0, 4);
   const month = dateOfBirth.substr(4, 2);
   let day = +dateOfBirth.substr(6, 2);
-
   if (day >= 32) {
     day -= 60;
   }
-  const retval = new Date(`${year}-${month}-${padWithLeadingZero(day)} 00:0.000Z`);
+  const retval = new Date(
+    `${year}-${month}-${padWithLeadingZero(day)} 00:0.000Z`
+  );
   retval.setHours(0);
   retval.setMinutes(0);
   retval.setSeconds(0);
   return retval;
+}
 
+export function isFutureDate(dateOfBirth: Date): boolean {
+  const today = new Date();
+  return today < dateOfBirth;
+}
+
+export function isUnder18(dateOfBirth: Date): boolean {
+  const today = new Date();
+  let years = today.getFullYear() - dateOfBirth.getFullYear();
+  if (
+    today.getMonth() < dateOfBirth.getMonth() ||
+    (today.getMonth() == dateOfBirth.getMonth() &&
+      today.getDate() < dateOfBirth.getDate())
+  ) {
+    years--;
+  }
+  return years < 18;
 }