feat/add function describeCurrency()

docs/pt-br/utilities.md

@@ -219,6 +219,21 @@ parseCurrency('10.756,11'); // 10756.11
 parseCurrency('R$ 10.59'); // 10.59
 ```
 
+## describeCurrency
+
+Transforma uma string ou numero para uma string descritiva
+
+```javascript
+import { describeCurrency } from '@brazilian-utils/brazilian-utils';
+
+describeCurrency(10); // dez reais e zero centavos
+describeCurrency(10.75); // dez reais e setenta e cinco centavos
+describeCurrency('10.75'); // dez reais e setenta e cinco centavos
+describeCurrency('R$ 10,75'); // dez reais e setenta e cinco centavos
+describeCurrency('R$ 10.756', false); // dez mil setecentos e cinquenta e seis
+describeCurrency('R$ 10.756,11', false); // dez mil setecentos e cinquenta e seis
+```
+
 ## getStates
 
 Retorna todos os estados brasileiros.

docs/utilities.md

@@ -219,6 +219,21 @@ parseCurrency('10.756,11'); // 10756.11
 parseCurrency('R$ 10.59'); // 10.59
 ```
 
+## describeCurrency
+
+Transforms a string or number to an described string
+
+```javascript
+import { describeCurrency } from '@brazilian-utils/brazilian-utils';
+
+describeCurrency(10); // dez reais e zero centavos
+describeCurrency(10.75); // dez reais e setenta e cinco centavos
+describeCurrency('10.75'); // dez reais e setenta e cinco centavos
+describeCurrency('R$ 10,75'); // dez reais e setenta e cinco centavos
+describeCurrency('R$ 10.756', false); // dez mil setecentos e cinquenta e seis
+describeCurrency('R$ 10.756,11', false); // dez mil setecentos e cinquenta e seis
+```
+
 ## getStates
 
 Get all Brazilian states.

src/index.test.ts

@@ -30,6 +30,7 @@ describe('Public API', () => {
     'capitalize',
     'formatCurrency',
     'parseCurrency',
+    'describeCurrency'
   ];
 
   Object.keys(API).forEach((method) => {

src/utilities/currency/index.test.ts

@@ -1,4 +1,132 @@
-import { format, parse } from '.';
+import { describe as describeNumber, format, parse, pt } from '.';
+
+describe('describe', () => {
+  test('should describe irregular numbers', () => {
+    expect.assertions(pt.irregular.length * 3);
+    for (let i = 0; i < 20; i++) {
+      const irregular = pt.irregular[i];
+      expect(describeNumber(i, false)).toBe(irregular);
+      expect(describeNumber(i)).toBe(`${irregular} reais e zero centavos`);
+      expect(describeNumber(i + 0.05)).toBe(`${irregular} reais e cinco centavos`);
+    }
+  });
+
+  test('should describe rounded ten numbers', () => {
+    expect.assertions(pt.ten.length * 2);
+    for (let i = 0; i < 10; i++) {
+      const n = i * 10;
+      const ten = pt.irregular[n] ?? pt.ten[i];
+      expect(describeNumber(n, false)).toBe(ten);
+      expect(describeNumber(n)).toBe(`${ten} reais e zero centavos`);
+    }
+  });
+
+  test('should describe composed ten numbers', () => {
+    expect.assertions((pt.ten.length - 2) * 3);
+    for (let i = 2; i < 10; i++) {
+      const n = i * 10;
+      const singular = pt.irregular[i];
+      const ten = pt.irregular[n] ?? pt.ten[i];
+      const composed = ten === singular ? ten : `${ten} e ${singular}`;
+      expect(describeNumber(n + 0.55)).toBe(`${ten} reais e cinquenta e cinco centavos`);
+      expect(describeNumber(n + i)).toBe(`${composed} reais e zero centavos`);
+      expect(describeNumber(n + i + 0.55)).toBe(`${composed} reais e cinquenta e cinco centavos`);
+    }
+  });
+
+  test('should describe hundred numbers', () => {
+    expect.assertions((pt.hundred.length - 1) * 7);
+    for (let i = 1; i < 10; i++) {
+      const n = i * 100;
+      const singular = pt.irregular[i];
+      const hundred = pt.hundred[i];
+      const singularHundred = pt.hundred[i].replace(/nto$/i, 'm');
+      expect(describeNumber(n, false)).toBe(singularHundred);
+      expect(describeNumber(n)).toBe(`${singularHundred} reais e zero centavos`);
+      expect(describeNumber(n + 0.66)).toBe(`${singularHundred} reais e sessenta e seis centavos`);
+      expect(describeNumber(n + i)).toBe(`${hundred} e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + 20)).toBe(`${hundred} e vinte reais e zero centavos`);
+      expect(describeNumber(n + i + 20)).toBe(`${hundred} e vinte e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + i + 40 + 0.67)).toBe(
+        `${hundred} e quarenta e ${singular} reais e sessenta e sete centavos`
+      );
+    }
+  });
+
+  test('should describe rounded thousand numbers', () => {
+    expect.assertions(100 * 3);
+    for (let i = 1; i <= 100; i++) {
+      const n = i * 1000;
+      const thousand = describeNumber(i, false);
+      expect(describeNumber(n, false)).toBe(`${thousand} mil`);
+      expect(describeNumber(n)).toBe(`${thousand} mil reais e zero centavos`);
+      expect(describeNumber(n + 0.5)).toBe(`${thousand} mil reais e cinquenta centavos`);
+    }
+  });
+
+  test('should describe composed thousand numbers', () => {
+    expect.assertions((pt.hundred.length - 1) * 6);
+    for (let i = 1; i < 10; i++) {
+      const n = i * 1000;
+      const singular = pt.irregular[i];
+      const thousand = describeNumber(n, false);
+      expect(describeNumber(n + 0.66)).toBe(`${thousand} reais e sessenta e seis centavos`);
+      expect(describeNumber(n + i)).toBe(`${thousand} e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + 20)).toBe(`${thousand} e vinte reais e zero centavos`);
+      expect(describeNumber(n + 20 + i)).toBe(`${thousand} e vinte e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + 120 + i)).toBe(`${thousand} cento e vinte e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + i + 20 + 0.67)).toBe(
+        `${thousand} e vinte e ${singular} reais e sessenta e sete centavos`
+      );
+    }
+  });
+
+  test('should describe rounded million numbers', () => {
+    expect.assertions(100 * 3);
+    for (let i = 1; i <= 100; i++) {
+      const n = i * 1000000;
+      const million = describeNumber(i, false);
+      const assignment = i === 1 ? 'milhão' : 'milhões';
+      expect(describeNumber(n, false)).toBe(`${million} ${assignment}`);
+      expect(describeNumber(n)).toBe(`${million} ${assignment} de reais e zero centavos`);
+      expect(describeNumber(n + 0.5)).toBe(`${million} ${assignment} de reais e cinquenta centavos`);
+    }
+  });
+
+  test('should describe composed million numbers', () => {
+    expect.assertions(9 * 6);
+    for (let i = 1; i < 10; i++) {
+      const n = i * 1000000;
+      const singular = pt.irregular[i];
+      const million = describeNumber(i, false);
+      const assignment = i === 1 ? 'milhão' : 'milhões';
+      expect(describeNumber(n + 0.66)).toBe(`${million} ${assignment} de reais e sessenta e seis centavos`);
+      expect(describeNumber(n + i)).toBe(`${million} ${assignment} e ${singular} reais e zero centavos`);
+      expect(describeNumber(n + 20)).toBe(`${million} ${assignment} e vinte reais e zero centavos`);
+      expect(describeNumber(n + 20 + i)).toBe(
+        `${million} ${assignment} e vinte e ${singular} reais e zero centavos`
+      );
+      expect(describeNumber(n + 120 + i)).toBe(
+        `${million} ${assignment} cento e vinte e ${singular} reais e zero centavos`
+      );
+      expect(describeNumber(n + i + 20 + 0.67)).toBe(
+        `${million} ${assignment} e vinte e ${singular} reais e sessenta e sete centavos`
+      );
+    }
+  });
+
+  test('should describe formatted numbers', () => {
+    expect(describeNumber('R$ 1', false)).toBe('um');
+    expect(describeNumber('R$ 2,00', false)).toBe('dois');
+    expect(describeNumber('R$ 10.00')).toBe('dez reais e zero centavos');
+    expect(describeNumber('R$ 105,01')).toBe('cento e cinco reais e um centavos');
+    expect(describeNumber('R$ 105,1')).toBe('cento e cinco reais e dez centavos');
+    expect(describeNumber('R$ 105,10')).toBe('cento e cinco reais e dez centavos');
+    expect(describeNumber('R$ 1050,25')).toBe('um mil e cinquenta reais e vinte e cinco centavos');
+    expect(describeNumber('R$ 105000,99')).toBe('cento e cinco mil reais e noventa e nove centavos');
+    expect(describeNumber('R$ 105000000,00')).toBe('cento e cinco milhões de reais e zero centavos');
+  });
+});
 
 describe('format', () => {
   test('should format Currency into BRL', () => {

src/utilities/currency/index.ts

@@ -1,3 +1,148 @@
+import { onlyNumbers } from '../../helpers';
+
+export const pt = {
+  irregular: [
+    'zero',
+    'um',
+    'dois',
+    'três',
+    'quatro',
+    'cinco',
+    'seis',
+    'sete',
+    'oito',
+    'nove',
+    'dez',
+    'onze',
+    'doze',
+    'treze',
+    'catorze',
+    'quinze',
+    'dezesseis',
+    'dezessete',
+    'dezoito',
+    'dezenove',
+  ],
+  ten: ['zero', 'dez', 'vinte', 'trinta', 'quarenta', 'cinquenta', 'sessenta', 'setenta', 'oitenta', 'noventa'],
+  hundred: [
+    'zero',
+    'cento',
+    'duzentos',
+    'trezentos',
+    'quatrocentos',
+    'quinhentos',
+    'seiscentos',
+    'setecentos',
+    'oitocentos',
+    'novecentos',
+  ],
+};
+
+type CondicionalValue = string | boolean | number | null | undefined;
+
+function conditionalValue<R extends string>(isTruthy: CondicionalValue, result: R): R | undefined {
+  return isTruthy ? result : undefined;
+}
+
+function describeIrregular(digits: string): string {
+  const index = Number(digits);
+  return pt.irregular[index];
+}
+
+function describeTen(digits: string): string {
+  const isIrregular = Number(digits) < 20;
+  if (isIrregular) return describeIrregular(digits);
+
+  const isRounded = /^\d0$/i.test(digits);
+  const [tenValue, unitValue] = digits.split('');
+  const ten = pt.ten[Number(tenValue)];
+  if (isRounded) return ten;
+
+  const unit = describeIrregular(unitValue);
+  return `${ten} e ${unit}`;
+}
+
+function describeHundred(digits: string): string {
+  const isRounded = /^\d00$/i.test(digits);
+  const hundredValue = digits.slice(0, 1);
+  const hundred = pt.hundred[Number(hundredValue)];
+  if (isRounded) return hundred.replace(/nto$/i, 'm');
+
+  const tenValue = digits.slice(1);
+  const ten = describeTen(tenValue);
+  return `${hundred} e ${ten}`;
+}
+
+function describeThousand(digits: string): string {
+  const isRounded = /^\d{1,3}000$/i.test(digits);
+  const thousandValue = digits.replace(/\d{3}$/i, '');
+  const thousand = switchNumber(thousandValue);
+  if (isRounded) return `${thousand} mil`;
+
+  const hundredValue = digits.replace(/.+(\d{3})$/i, '$1');
+  const hundred = switchNumber(Number(hundredValue));
+  const goesHundred = Number(hundredValue) > 0;
+  const goesAnd = goesHundred && Number(hundredValue) <= 100;
+  return [thousand, ' mil', conditionalValue(goesAnd, ' e'), conditionalValue(goesHundred, ` ${hundred}`)].join('');
+}
+
+function describeMillion(digits: string): string {
+  const isRounded = /^\d{1,3}000000$/i.test(digits);
+  const millionValue = digits.replace(/\d{6}$/i, '');
+  const assignment = Number(millionValue) === 1 ? 'milhão' : 'milhões';
+  const million = switchNumber(millionValue);
+  if (isRounded) return `${million} ${assignment}`;
+
+  const thousandValue = digits.replace(/.+(\d{6})$/i, '$1');
+  const thousand = switchNumber(Number(thousandValue));
+  const goesThousand = Number(thousandValue) > 0;
+  const goesAnd = goesThousand && Number(thousandValue) <= 100;
+  return [million, ` ${assignment}`, conditionalValue(goesAnd, ' e'), conditionalValue(goesThousand, ` ${thousand}`)].join(
+    ''
+  );
+}
+
+function switchNumber(value: string | number): string {
+  const digits = onlyNumbers(value);
+
+  const isMillion = /^\d{7,9}$/i.test(digits);
+  if (isMillion) return describeMillion(digits);
+
+  const isThousand = /^\d{4,6}$/i.test(digits);
+  if (isThousand) return describeThousand(digits);
+
+  const isHundred = /^\d{3}$/i.test(digits);
+  if (isHundred) return describeHundred(digits);
+
+  const isTen = /^\d{2}$/i.test(digits);
+  if (isTen) return describeTen(digits);
+
+  return describeIrregular(digits);
+}
+
+export function describe(value: string | number, isCash: boolean = true): string {
+  if (typeof value === 'number') value = String(value);
+
+  let centavos = '';
+  const centavosExpression = /[,.]\d{1,2}$/i;
+  const hasCentavos = centavosExpression.test(value);
+  if (isCash) {
+    if (hasCentavos) {
+      const centavosValue = value.replace(/.+[,.](\d{1,2})$/i, '$1').padEnd(2, '0');
+      centavos = `${switchNumber(centavosValue)} centavos`;
+    } else {
+      centavos = 'zero centavos';
+    }
+  }
+
+  const reaisValue = value.replace(centavosExpression, '');
+  const reaisString = switchNumber(reaisValue)
+  const goesOf = /milh.{2,3}$/i.test(reaisString)
+  const reais = [reaisString, conditionalValue(goesOf && isCash, ' de'), conditionalValue(isCash, ' reais')].join('');
+
+  return [reais, conditionalValue(centavos, ` e ${centavos}`)].join('');
+}
+
 type FormatOptions = {
   precision?: number;
 };

src/utilities/index.ts

@@ -5,7 +5,7 @@ export { isValid as isValidEmail } from './email';
 export { format as formatProcessoJuridico, isValid as isValidProcessoJuridico } from './processo-juridico';
 export { format as formatCEP, isValid as isValidCEP } from './cep';
 export { format as formatBoleto, isValid as isValidBoleto } from './boleto';
-export { format as formatCurrency, parse as parseCurrency } from './currency';
+export { format as formatCurrency, parse as parseCurrency, describe as describeCurrency } from './currency';
 export { format as formatCPF, generate as generateCPF, isValid as isValidCPF } from './cpf';
 export { format as formatCNPJ, generate as generateCNPJ, isValid as isValidCNPJ } from './cnpj';
 export { capitalize } from './capitalize';