[fix]: 초성, 중성, 종성을 사용하도록 통일

src/canBe.ts

@@ -1,9 +1,5 @@
 import { hasValueInReadOnlyStringList } from './_internal';
-import {
-  HANGUL_CHARACTERS_BY_FIRST_INDEX,
-  HANGUL_CHARACTERS_BY_LAST_INDEX,
-  HANGUL_CHARACTERS_BY_MIDDLE_INDEX,
-} from './constants';
+import { CHOSEONGS, JONGSEONGS, JUNSEONGS } from './constants';
 
 /**
  * @name canBeChoseong
@@ -22,8 +18,8 @@ import {
  * canBeChoseong('ㅏ') // false
  * canBeChoseong('가') // false
  */
-export function canBeChoseong(character: string): character is (typeof HANGUL_CHARACTERS_BY_FIRST_INDEX)[number] {
-  return hasValueInReadOnlyStringList(HANGUL_CHARACTERS_BY_FIRST_INDEX, character);
+export function canBeChoseong(character: string): character is (typeof CHOSEONGS)[number] {
+  return hasValueInReadOnlyStringList(CHOSEONGS, character);
 }
 
 /**
@@ -44,8 +40,8 @@ export function canBeChoseong(character: string): character is (typeof HANGUL_CH
  * canBeJungseong('ㄱㅅ') // false
  * canBeJungseong('가') // false
  */
-export function canBeJungseong(character: string): character is (typeof HANGUL_CHARACTERS_BY_MIDDLE_INDEX)[number] {
-  return hasValueInReadOnlyStringList(HANGUL_CHARACTERS_BY_MIDDLE_INDEX, character);
+export function canBeJungseong(character: string): character is (typeof JUNSEONGS)[number] {
+  return hasValueInReadOnlyStringList(JUNSEONGS, character);
 }
 
 /**
@@ -66,6 +62,6 @@ export function canBeJungseong(character: string): character is (typeof HANGUL_C
  * canBeJongseong('ㅏ') // false
  * canBeJongseong('ㅗㅏ') // false
  */
-export function canBeJongseong(character: string): character is (typeof HANGUL_CHARACTERS_BY_LAST_INDEX)[number] {
-  return hasValueInReadOnlyStringList(HANGUL_CHARACTERS_BY_LAST_INDEX, character);
+export function canBeJongseong(character: string): character is (typeof JONGSEONGS)[number] {
+  return hasValueInReadOnlyStringList(JONGSEONGS, character);
 }

src/combineCharacter.ts

@@ -2,9 +2,9 @@ import { canBeChoseong, canBeJongseong, canBeJungseong } from './canBe';
 import {
   COMPLETE_HANGUL_START_CHARCODE,
   DISASSEMBLED_VOWELS_BY_VOWEL,
-  HANGUL_CHARACTERS_BY_FIRST_INDEX,
-  HANGUL_CHARACTERS_BY_LAST_INDEX,
-  HANGUL_CHARACTERS_BY_MIDDLE_INDEX,
+  CHOSEONGS,
+  JONGSEONGS,
+  JUNSEONGS,
 } from './constants';
 
 /**
@@ -14,38 +14,33 @@ import {
  * ```typescript
  * combineCharacter(
  *   // 초성
- *   firstCharacter: string
+ *   choseong: string
  *   // 중성
- *   middleCharacter: string
+ *   jungseong: string
  *   // 종성
- *   lastCharacter: string
+ *   jongseong: string
  * ): string
  * ```
  * @example
  * combineCharacter('ㄱ', 'ㅏ', 'ㅂㅅ') // '값'
  * combineCharacter('ㅌ', 'ㅗ') // '토'
  */
-export function combineCharacter(firstCharacter: string, middleCharacter: string, lastCharacter = '') {
-  if (
-    canBeChoseong(firstCharacter) === false ||
-    canBeJungseong(middleCharacter) === false ||
-    canBeJongseong(lastCharacter) === false
-  ) {
-    throw new Error(`Invalid hangul Characters: ${firstCharacter}, ${middleCharacter}, ${lastCharacter}`);
+export function combineCharacter(choseong: string, jungseong: string, jongseong = '') {
+  if (canBeChoseong(choseong) === false || canBeJungseong(jungseong) === false || canBeJongseong(jongseong) === false) {
+    throw new Error(`Invalid hangul Characters: ${choseong}, ${jungseong}, ${jongseong}`);
   }
 
-  const numOfMiddleCharacters = HANGUL_CHARACTERS_BY_MIDDLE_INDEX.length;
-  const numOfLastCharacters = HANGUL_CHARACTERS_BY_LAST_INDEX.length;
+  const numOfJungseongs = JUNSEONGS.length;
+  const numOfJongseongs = JONGSEONGS.length;
 
-  const firstCharacterIndex = HANGUL_CHARACTERS_BY_FIRST_INDEX.indexOf(firstCharacter);
-  const middleCharacterIndex = HANGUL_CHARACTERS_BY_MIDDLE_INDEX.indexOf(middleCharacter);
-  const lastCharacterIndex = HANGUL_CHARACTERS_BY_LAST_INDEX.indexOf(lastCharacter);
+  const choseongIndex = CHOSEONGS.indexOf(choseong as (typeof CHOSEONGS)[number]);
+  const jungseongIndex = JUNSEONGS.indexOf(jungseong as (typeof JUNSEONGS)[number]);
+  const jongseongIndex = JONGSEONGS.indexOf(jongseong as (typeof JONGSEONGS)[number]);
 
-  const firstIndexOfTargetConsonant = firstCharacterIndex * numOfMiddleCharacters * numOfLastCharacters;
-  const firstIndexOfTargetVowel = middleCharacterIndex * numOfLastCharacters;
+  const choseongOfTargetConsonant = choseongIndex * numOfJungseongs * numOfJongseongs;
+  const choseongOfTargetVowel = jungseongIndex * numOfJongseongs;
 
-  const unicode =
-    COMPLETE_HANGUL_START_CHARCODE + firstIndexOfTargetConsonant + firstIndexOfTargetVowel + lastCharacterIndex;
+  const unicode = COMPLETE_HANGUL_START_CHARCODE + choseongOfTargetConsonant + choseongOfTargetVowel + jongseongIndex;
 
   return String.fromCharCode(unicode);
 }
@@ -60,10 +55,10 @@ export function combineCharacter(firstCharacter: string, middleCharacter: string
  * combineLastHangulCharacter('ㄱ') // '각'
  */
 export const curriedCombineCharacter =
-  (firstCharacter: string) =>
-  (middleCharacter: string) =>
-  (lastCharacter = '') =>
-    combineCharacter(firstCharacter, middleCharacter, lastCharacter);
+  (choseong: string) =>
+  (jungseong: string) =>
+  (jongseong = '') =>
+    combineCharacter(choseong, jungseong, jongseong);
 
 /**
  * @name combineVowels

src/constants.ts

@@ -79,7 +79,7 @@ export const DISASSEMBLED_VOWELS_BY_VOWEL = {
 /**
  * 초성으로 올 수 있는 한글 글자
  */
-export const HANGUL_CHARACTERS_BY_FIRST_INDEX = [
+export const CHOSEONGS = [
   'ㄱ',
   'ㄲ',
   'ㄴ',
@@ -104,12 +104,12 @@ export const HANGUL_CHARACTERS_BY_FIRST_INDEX = [
 /**
  * 중성으로 올 수 있는 한글 글자
  */
-export const HANGUL_CHARACTERS_BY_MIDDLE_INDEX = Object.values(DISASSEMBLED_VOWELS_BY_VOWEL);
+export const JUNSEONGS = Object.values(DISASSEMBLED_VOWELS_BY_VOWEL);
 
 /**
  * 종성으로 올 수 있는 한글 글자
  */
-export const HANGUL_CHARACTERS_BY_LAST_INDEX = (
+export const JONGSEONGS = (
   [
     '',
     'ㄱ',

src/disassemble.ts

@@ -16,7 +16,11 @@ export function disassembleToGroups(str: string) {
     const disassembledComplete = disassembleCompleteCharacter(letter);
 
     if (disassembledComplete != null) {
-      result.push([...disassembledComplete.first, ...disassembledComplete.middle, ...disassembledComplete.last]);
+      result.push([
+        ...disassembledComplete.choseong,
+        ...disassembledComplete.jungseong,
+        ...disassembledComplete.jongseong,
+      ]);
       continue;
     }
 

src/disassembleCompleteCharacter.spec.ts

@@ -3,33 +3,33 @@ import { disassembleCompleteCharacter } from './disassembleCompleteCharacter';
 describe('disassembleCompleteCharacter', () => {
   it('값', () => {
     expect(disassembleCompleteCharacter('값')).toEqual({
-      first: 'ㄱ',
-      middle: 'ㅏ',
-      last: 'ㅂㅅ',
+      choseong: 'ㄱ',
+      jungseong: 'ㅏ',
+      jongseong: 'ㅂㅅ',
     });
   });
 
   it('리', () => {
     expect(disassembleCompleteCharacter('리')).toEqual({
-      first: 'ㄹ',
-      middle: 'ㅣ',
-      last: '',
+      choseong: 'ㄹ',
+      jungseong: 'ㅣ',
+      jongseong: '',
     });
   });
 
   it('빚', () => {
     expect(disassembleCompleteCharacter('빚')).toEqual({
-      first: 'ㅂ',
-      middle: 'ㅣ',
-      last: 'ㅈ',
+      choseong: 'ㅂ',
+      jungseong: 'ㅣ',
+      jongseong: 'ㅈ',
     });
   });
 
   it('박', () => {
     expect(disassembleCompleteCharacter('박')).toEqual({
-      first: 'ㅂ',
-      middle: 'ㅏ',
-      last: 'ㄱ',
+      choseong: 'ㅂ',
+      jungseong: 'ㅏ',
+      jongseong: 'ㄱ',
     });
   });
 

src/disassembleCompleteCharacter.ts

@@ -1,17 +1,17 @@
 import {
   COMPLETE_HANGUL_END_CHARCODE,
   COMPLETE_HANGUL_START_CHARCODE,
-  HANGUL_CHARACTERS_BY_FIRST_INDEX,
-  HANGUL_CHARACTERS_BY_LAST_INDEX,
-  HANGUL_CHARACTERS_BY_MIDDLE_INDEX,
+  CHOSEONGS,
+  JONGSEONGS,
+  JUNSEONGS,
   NUMBER_OF_JONGSEONG,
   NUMBER_OF_JUNGSEONG,
 } from './constants';
 
 interface ReturnTypeDisassembleCompleteCharacter {
-  first: (typeof HANGUL_CHARACTERS_BY_FIRST_INDEX)[number];
-  middle: (typeof HANGUL_CHARACTERS_BY_MIDDLE_INDEX)[number];
-  last: (typeof HANGUL_CHARACTERS_BY_LAST_INDEX)[number];
+  choseong: (typeof CHOSEONGS)[number];
+  jungseong: (typeof JUNSEONGS)[number];
+  jongseong: (typeof JONGSEONGS)[number];
 }
 
 /**
@@ -22,10 +22,10 @@ interface ReturnTypeDisassembleCompleteCharacter {
  * @param {string} letter 분리하고자 하는 완전한 한글 문자열
  *
  * @example
- * disassembleCompleteCharacter('값') // { first: 'ㄱ', middle: 'ㅏ', last: 'ㅂㅅ' }
- * disassembleCompleteCharacter('리') // { first: 'ㄹ', middle: 'ㅣ', last: '' }
- * disassembleCompleteCharacter('빚') // { first: 'ㅂ', middle: 'ㅣ', last: 'ㅈ' }
- * disassembleCompleteCharacter('박') // { first: 'ㅂ', middle: 'ㅏ', last: 'ㄱ' }
+ * disassembleCompleteCharacter('값') // { choseong: 'ㄱ', jungseong: 'ㅏ', jongseong: 'ㅂㅅ' }
+ * disassembleCompleteCharacter('리') // { choseong: 'ㄹ', jungseong: 'ㅣ', jongseong: '' }
+ * disassembleCompleteCharacter('빚') // { choseong: 'ㅂ', jungseong: 'ㅣ', jongseong: 'ㅈ' }
+ * disassembleCompleteCharacter('박') // { choseong: 'ㅂ', jungseong: 'ㅏ', jongseong: 'ㄱ' }
  */
 
 export function disassembleCompleteCharacter(letter: string): ReturnTypeDisassembleCompleteCharacter | undefined {
@@ -39,13 +39,13 @@ export function disassembleCompleteCharacter(letter: string): ReturnTypeDisassem
 
   const hangulCode = charCode - COMPLETE_HANGUL_START_CHARCODE;
 
-  const lastIndex = hangulCode % NUMBER_OF_JONGSEONG;
-  const middleIndex = ((hangulCode - lastIndex) / NUMBER_OF_JONGSEONG) % NUMBER_OF_JUNGSEONG;
-  const firstIndex = Math.floor((hangulCode - lastIndex) / NUMBER_OF_JONGSEONG / NUMBER_OF_JUNGSEONG);
+  const jongseongIndex = hangulCode % NUMBER_OF_JONGSEONG;
+  const jungseongIndex = ((hangulCode - jongseongIndex) / NUMBER_OF_JONGSEONG) % NUMBER_OF_JUNGSEONG;
+  const choseongIndex = Math.floor((hangulCode - jongseongIndex) / NUMBER_OF_JONGSEONG / NUMBER_OF_JUNGSEONG);
 
   return {
-    first: HANGUL_CHARACTERS_BY_FIRST_INDEX[firstIndex],
-    middle: HANGUL_CHARACTERS_BY_MIDDLE_INDEX[middleIndex],
-    last: HANGUL_CHARACTERS_BY_LAST_INDEX[lastIndex],
+    choseong: CHOSEONGS[choseongIndex],
+    jungseong: JUNSEONGS[jungseongIndex],
+    jongseong: JONGSEONGS[jongseongIndex],
   } as const;
 }

src/disassembleCompleteHangulCharacter.spec.ts

@@ -0,0 +1,40 @@
+import { disassembleCompleteCharacter } from './disassembleCompleteCharacter';
+
+describe('disassembleCompleteCharacter', () => {
+  it('값', () => {
+    expect(disassembleCompleteCharacter('값')).toEqual({
+      choseong: 'ㄱ',
+      jungseong: 'ㅏ',
+      jongseong: 'ㅂㅅ',
+    });
+  });
+
+  it('리', () => {
+    expect(disassembleCompleteCharacter('리')).toEqual({
+      choseong: 'ㄹ',
+      jungseong: 'ㅣ',
+      jongseong: '',
+    });
+  });
+
+  it('빚', () => {
+    expect(disassembleCompleteCharacter('빚')).toEqual({
+      choseong: 'ㅂ',
+      jungseong: 'ㅣ',
+      jongseong: 'ㅈ',
+    });
+  });
+
+  it('박', () => {
+    expect(disassembleCompleteCharacter('박')).toEqual({
+      choseong: 'ㅂ',
+      jungseong: 'ㅏ',
+      jongseong: 'ㄱ',
+    });
+  });
+
+  it('완전한 한글 문자열이 아니면 undefined를 반환해야 합니다.', () => {
+    expect(disassembleCompleteCharacter('ㄱ')).toBeUndefined;
+    expect(disassembleCompleteCharacter('ㅏ')).toBeUndefined;
+  });
+});

src/getChoseong.ts

@@ -1,4 +1,4 @@
-import { HANGUL_CHARACTERS_BY_FIRST_INDEX, JASO_HANGUL_NFD } from './constants';
+import { CHOSEONGS, JASO_HANGUL_NFD } from './constants';
 
 /**
  * @name getChoseong
@@ -18,7 +18,7 @@ export function getChoseong(word: string) {
   return word
     .normalize('NFD')
     .replace(EXTRACT_CHOSEONG_REGEX, '') // NFD ㄱ-ㅎ, NFC ㄱ-ㅎ 외 문자 삭제
-    .replace(CHOOSE_NFD_CHOSEONG_REGEX, $0 => HANGUL_CHARACTERS_BY_FIRST_INDEX[$0.charCodeAt(0) - 0x1100]); // NFD to NFC
+    .replace(CHOOSE_NFD_CHOSEONG_REGEX, $0 => CHOSEONGS[$0.charCodeAt(0) - 0x1100]); // NFD to NFC
 }
 
 const EXTRACT_CHOSEONG_REGEX = new RegExp(

src/hasBatchim.ts

@@ -1,7 +1,7 @@
 import {
   COMPLETE_HANGUL_END_CHARCODE,
   COMPLETE_HANGUL_START_CHARCODE,
-  HANGUL_CHARACTERS_BY_LAST_INDEX,
+  JONGSEONGS,
   NUMBER_OF_JONGSEONG,
 } from './constants';
 
@@ -50,11 +50,11 @@ export function hasBatchim(
   const batchimCode = (charCode - COMPLETE_HANGUL_START_CHARCODE) % NUMBER_OF_JONGSEONG;
 
   if (options?.only === 'single') {
-    return HANGUL_CHARACTERS_BY_LAST_INDEX[batchimCode].length === 1;
+    return JONGSEONGS[batchimCode].length === 1;
   }
 
   if (options?.only === 'double') {
-    return HANGUL_CHARACTERS_BY_LAST_INDEX[batchimCode].length === 2;
+    return JONGSEONGS[batchimCode].length === 2;
   }
 
   return batchimCode > 0;

src/josa.ts

@@ -37,7 +37,7 @@ function josaPicker(word: string, josa: JosaOption): string {
   const has받침 = hasBatchim(word);
   let index = has받침 ? 0 : 1;
 
-  const is종성ㄹ = disassembleCompleteCharacter(word[word.length - 1])?.last === 'ㄹ';
+  const is종성ㄹ = disassembleCompleteCharacter(word[word.length - 1])?.jongseong === 'ㄹ';
 
   const isCaseOf로 = has받침 && is종성ㄹ && 로_조사.includes(josa);
 

src/romanize.ts

@@ -27,15 +27,16 @@ const romanizeSyllableHangul = (arrayHangul: string[], index: number): string =>
       ReturnType<typeof disassembleCompleteCharacter>
     >;
 
-    let choseong: (typeof 초성_알파벳_발음)[keyof typeof 초성_알파벳_발음] | 'l' = 초성_알파벳_발음[disassemble.first];
-    const jungseong = 중성_알파벳_발음[assemble([disassemble.middle]) as keyof typeof 중성_알파벳_발음];
-    const jongseong = 종성_알파벳_발음[disassemble.last as keyof typeof 종성_알파벳_발음];
+    let choseong: (typeof 초성_알파벳_발음)[keyof typeof 초성_알파벳_발음] | 'l' =
+      초성_알파벳_발음[disassemble.choseong];
+    const jungseong = 중성_알파벳_발음[assemble([disassemble.jungseong]) as keyof typeof 중성_알파벳_발음];
+    const jongseong = 종성_알파벳_발음[disassemble.jongseong as keyof typeof 종성_알파벳_발음];
 
     // 'ㄹ'은 모음 앞에서는 'r'로, 자음 앞이나 어말에서는 'l'로 적는다. 단, 'ㄹㄹ'은 'll'로 적는다. (ex.울릉, 대관령),
-    if (disassemble.first === 'ㄹ' && index > 0 && isHangulCharacter(arrayHangul[index - 1])) {
+    if (disassemble.choseong === 'ㄹ' && index > 0 && isHangulCharacter(arrayHangul[index - 1])) {
       const prevDisassemble = disassembleCompleteCharacter(arrayHangul[index - 1]);
 
-      if (prevDisassemble?.last === 'ㄹ') {
+      if (prevDisassemble?.jongseong === 'ㄹ') {
         choseong = 'l';
       }
     }

src/standardizePronunciation/index.ts

@@ -146,7 +146,7 @@ function applyRules(params: ApplyParameters): {
 function assembleChangedHangul(disassembleHangul: Syllable[], notHangulPhrase: NotHangul[]): string {
   const changedSyllables = disassembleHangul
     .filter(isNotUndefined)
-    .map(syllable => combineCharacter(syllable.first, syllable.middle, syllable.last));
+    .map(syllable => combineCharacter(syllable.choseong, syllable.jungseong, syllable.jongseong));
 
   for (const { index, syllable } of notHangulPhrase) {
     changedSyllables.splice(index, 0, syllable);

src/standardizePronunciation/rules/rules.utils.ts

@@ -1,5 +1,5 @@
 import { Syllable } from './rules.types';
 
-export function replace받침ㅎ(currentSyllable: Syllable): Syllable['last'] {
-  return currentSyllable.last.replace('ㅎ', '') as Syllable['last'];
+export function replace받침ㅎ(currentSyllable: Syllable): Syllable['jongseong'] {
+  return currentSyllable.jongseong.replace('ㅎ', '') as Syllable['jongseong'];
 }