refactor: add types

dist/example.d.ts

@@ -0,0 +1 @@
+export {};

dist/example.js

@@ -0,0 +1,13 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var _1 = __importDefault(require("."));
+console.log((0, _1.default)({
+    name: 'Red Cross of Belgium',
+    iban: 'BE72000000001616',
+    amount: 123.45,
+    unstructuredReference: 'Urgency fund',
+    information: 'Sample QR code'
+}));

dist/index.d.ts

@@ -0,0 +1,12 @@
+type QrCodeData = {
+    name: string;
+    iban: string;
+    bic?: string;
+    amount?: number;
+    purposeCode?: string;
+    structuredReference?: string;
+    unstructuredReference?: string;
+    information?: string;
+};
+declare const generateQrCode: (data: QrCodeData) => string;
+export = generateQrCode;

dist/index.js

@@ -0,0 +1,86 @@
+"use strict";
+var iban_1 = require("iban");
+var SERVICE_TAG = 'BCD';
+var VERSION = '002';
+var CHARACTER_SET = 1;
+var IDENTIFICATION_CODE = 'SCT';
+var assertNonEmptyString = function (val, name) {
+    if (typeof val !== 'string' || !val) {
+        throw new Error(name + ' must be a non-empty string.');
+    }
+};
+var generateQrCode = function (data) {
+    if (!data)
+        throw new Error('data must be an object.');
+    // > AT-21 Name of the Beneficiary
+    assertNonEmptyString(data.name, 'data.name');
+    if (data.name.length > 70)
+        throw new Error('data.name must have <=70 characters');
+    // > AT-23 BIC of the Beneficiary Bank
+    if (data.bic) {
+        assertNonEmptyString(data.bic, 'data.bic');
+        if (data.bic.length > 11)
+            throw new Error('data.bic must have <=11 characters');
+        // todo: validate more?
+    }
+    // > AT-20 Account number of the Beneficiary
+    // > Only IBAN is allowed.
+    assertNonEmptyString(data.iban, 'data.iban');
+    if (!(0, iban_1.isValid)(data.iban)) {
+        throw new Error('data.iban must be a valid iban code.');
+    }
+    // > AT-04 Amount of the Credit Transfer in Euro
+    // > Amount must be 0.01 or more and 999999999.99 or less
+    if (data.amount !== null) {
+        if (typeof data.amount !== 'number')
+            throw new Error('data.amount must be a number or null.');
+        if (data.amount < 0.01 || data.amount > 999999999.99) {
+            throw new Error('data.amount must be >=0.01 and <=999999999.99.');
+        }
+    }
+    // > AT-44 Purpose of the Credit Transfer
+    if (data.purposeCode) {
+        assertNonEmptyString(data.purposeCode, 'data.purposeCode');
+        if (data.purposeCode.length > 4)
+            throw new Error('data.purposeCode must have <=4 characters');
+        // todo: validate against AT-44
+    }
+    // > AT-05 Remittance Information (Structured)
+    // > Creditor Reference (ISO 11649 RF Creditor Reference may be used)
+    if (data.structuredReference) {
+        assertNonEmptyString(data.structuredReference, 'data.structuredReference');
+        if (data.structuredReference.length > 35)
+            throw new Error('data.structuredReference must have <=35 characters');
+        // todo: validate against AT-05
+    }
+    // > AT-05 Remittance Information (Unstructured)
+    if (data.unstructuredReference) {
+        assertNonEmptyString(data.unstructuredReference, 'data.unstructuredReference');
+        if (data.unstructuredReference.length > 140)
+            throw new Error('data.unstructuredReference must have <=140 characters');
+    }
+    if ('structuredReference' in data && 'unstructuredReference' in data) {
+        throw new Error('Use either data.structuredReference or data.unstructuredReference.');
+    }
+    // > Beneficiary to originator information
+    if (data.information) {
+        assertNonEmptyString(data.information, 'data.information');
+        if (data.information.length > 70)
+            throw new Error('data.information must have <=70 characters');
+    }
+    return [
+        SERVICE_TAG,
+        VERSION,
+        CHARACTER_SET,
+        IDENTIFICATION_CODE,
+        data.bic,
+        data.name,
+        (0, iban_1.electronicFormat)(data.iban),
+        data.amount === null ? '' : 'EUR' + data.amount.toFixed(2),
+        data.purposeCode || '',
+        data.structuredReference || '',
+        data.unstructuredReference || '',
+        data.information || '',
+    ].join('\n');
+};
+module.exports = generateQrCode;

dist/test.d.ts

@@ -0,0 +1 @@
+export {};

dist/test.js

@@ -0,0 +1,46 @@
+"use strict";
+var __assign = (this && this.__assign) || function () {
+    __assign = Object.assign || function(t) {
+        for (var s, i = 1, n = arguments.length; i < n; i++) {
+            s = arguments[i];
+            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+                t[p] = s[p];
+        }
+        return t;
+    };
+    return __assign.apply(this, arguments);
+};
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var assert_1 = require("assert");
+var _1 = __importDefault(require("."));
+var ex1 = {
+    name: 'Red Cross of Belgium',
+    iban: 'BE72000000001616',
+    bic: 'BPOTBEB1',
+    amount: 123.45,
+    reference: 'Urgency fund',
+    purposeCode: 'abc',
+    structuredReference: '123',
+    information: 'foo bar'
+};
+(0, assert_1.strictEqual)((0, _1.default)(ex1), "BCD\n002\n1\nSCT\nBPOTBEB1\nRed Cross of Belgium\nBE72000000001616\nEUR123.45\nabc\n123\n\nfoo bar");
+// missing data.iban
+{
+    var ex2_1 = __assign({}, ex1);
+    delete ex2_1.iban;
+    (0, assert_1.throws)(function () {
+        (0, _1.default)(ex2_1);
+    }, 'throws with missing data.iban');
+}
+// invalid data.iban
+{
+    (0, assert_1.throws)(function () {
+        (0, _1.default)(__assign(__assign({}, ex1), { iban: 'BE00000000000000' }));
+    }, 'throws with invalid data.iban');
+}
+// omitted amount
+(0, assert_1.strictEqual)((0, _1.default)(__assign(__assign({}, ex1), { amount: null })), "BCD\n002\n1\nSCT\nBPOTBEB1\nRed Cross of Belgium\nBE72000000001616\n\nabc\n123\n\nfoo bar");
+console.info('seems to work ✓');

example.js → example.ts

@@ -1,6 +1,4 @@
-'use strict'
-
-const generateQrCode = require('.')
+import generateQrCode from '.'
 
 console.log(generateQrCode({
 	name: 'Red Cross of Belgium',

index.ts

@@ -0,0 +1,102 @@
+import { isValid, electronicFormat } from 'iban'
+
+const SERVICE_TAG = 'BCD'
+const VERSION = '002'
+const CHARACTER_SET = 1
+const IDENTIFICATION_CODE = 'SCT'
+
+const assertNonEmptyString = (val: unknown, name: string) => {
+  if (typeof val !== 'string' || !val) {
+    throw new Error(name + ' must be a non-empty string.')
+  }
+}
+
+type QrCodeData = {
+  name: string
+  iban: string
+  bic?: string
+  amount?: number
+  purposeCode?: string
+  structuredReference?: string
+  unstructuredReference?: string
+  information?: string
+}
+
+const generateQrCode = (data: QrCodeData) => {
+  if (!data) throw new Error('data must be an object.')
+
+  // > AT-21 Name of the Beneficiary
+  assertNonEmptyString(data.name, 'data.name')
+  if (data.name.length > 70) throw new Error('data.name must have <=70 characters')
+
+  // > AT-23 BIC of the Beneficiary Bank
+  if (data.bic) {
+    assertNonEmptyString(data.bic, 'data.bic')
+    if (data.bic.length > 11) throw new Error('data.bic must have <=11 characters')
+    // todo: validate more?
+  }
+
+  // > AT-20 Account number of the Beneficiary
+  // > Only IBAN is allowed.
+  assertNonEmptyString(data.iban, 'data.iban')
+  if (!isValid(data.iban)) {
+    throw new Error('data.iban must be a valid iban code.')
+  }
+
+  // > AT-04 Amount of the Credit Transfer in Euro
+  // > Amount must be 0.01 or more and 999999999.99 or less
+  if (data.amount !== null) {
+    if (typeof data.amount !== 'number') throw new Error('data.amount must be a number or null.')
+    if (data.amount < 0.01 || data.amount > 999999999.99) {
+      throw new Error('data.amount must be >=0.01 and <=999999999.99.')
+    }
+  }
+
+  // > AT-44 Purpose of the Credit Transfer
+  if (data.purposeCode) {
+    assertNonEmptyString(data.purposeCode, 'data.purposeCode')
+    if (data.purposeCode.length > 4) throw new Error('data.purposeCode must have <=4 characters')
+    // todo: validate against AT-44
+  }
+
+  // > AT-05 Remittance Information (Structured)
+  // > Creditor Reference (ISO 11649 RF Creditor Reference may be used)
+  if (data.structuredReference) {
+    assertNonEmptyString(data.structuredReference, 'data.structuredReference')
+    if (data.structuredReference.length > 35)
+      throw new Error('data.structuredReference must have <=35 characters')
+    // todo: validate against AT-05
+  }
+  // > AT-05 Remittance Information (Unstructured)
+  if (data.unstructuredReference) {
+    assertNonEmptyString(data.unstructuredReference, 'data.unstructuredReference')
+    if (data.unstructuredReference.length > 140)
+      throw new Error('data.unstructuredReference must have <=140 characters')
+  }
+  if ('structuredReference' in data && 'unstructuredReference' in data) {
+    throw new Error('Use either data.structuredReference or data.unstructuredReference.')
+  }
+
+  // > Beneficiary to originator information
+  if (data.information) {
+    assertNonEmptyString(data.information, 'data.information')
+    if (data.information.length > 70) throw new Error('data.information must have <=70 characters')
+  }
+
+  return [
+    SERVICE_TAG,
+    VERSION,
+    CHARACTER_SET,
+    IDENTIFICATION_CODE,
+    data.bic,
+    data.name,
+    electronicFormat(data.iban),
+    data.amount === null ? '' : 'EUR' + data.amount.toFixed(2),
+    data.purposeCode || '',
+    data.structuredReference || '',
+    data.unstructuredReference || '',
+    data.information || '',
+  ].join('\n')
+}
+
+export = generateQrCode