From 2d11a7bae983430db835f0c4b19df0f372b35e2d Mon Sep 17 00:00:00 2001
From: djaco <djaco@t-win.kr>
Date: Wed, 13 Aug 2025 13:27:56 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EC=9C=A0=ED=8B=B8=EB=A6=AC=ED=8B=B0=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
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🕐 커밋 시간: 2025. 08. 13. 13:27:54

📊 변경 통계:
  • 총 파일: 3개

📁 추가된 파일:
  + com.twin.app.shoptime/src/utils/fp.js
  + com.twin.app.shoptime/src/utils/lodash.js
  + com.twin.app.shoptime/src/utils/lodashFpEx.js

🔧 주요 변경 내용:
  • 공통 유틸리티 함수 최적화
---
 com.twin.app.shoptime/src/utils/fp.js         |  12 +
 com.twin.app.shoptime/src/utils/lodash.js     |   4 +
 com.twin.app.shoptime/src/utils/lodashFpEx.js | 468 ++++++++++++++++++
 3 files changed, 484 insertions(+)
 create mode 100644 com.twin.app.shoptime/src/utils/fp.js
 create mode 100644 com.twin.app.shoptime/src/utils/lodash.js
 create mode 100644 com.twin.app.shoptime/src/utils/lodashFpEx.js

diff --git a/com.twin.app.shoptime/src/utils/fp.js b/com.twin.app.shoptime/src/utils/fp.js
new file mode 100644
index 00000000..569e44b3
--- /dev/null
+++ b/com.twin.app.shoptime/src/utils/fp.js
@@ -0,0 +1,12 @@
+// FP bootstrap: use locally-extended lodash instance
+// './lodash' already mixes in our custom extensions from './lodashFpEx'
+import fp from './lodash';
+
+export const {
+  pipe, flow, curry, compose,
+  map, filter, reduce, get, set,
+  isEmpty, isNotEmpty, isNil, isNotNil,
+  mapAsync, reduceAsync, filterAsync,
+} = fp;
+
+export default fp;
diff --git a/com.twin.app.shoptime/src/utils/lodash.js b/com.twin.app.shoptime/src/utils/lodash.js
new file mode 100644
index 00000000..ac1389e5
--- /dev/null
+++ b/com.twin.app.shoptime/src/utils/lodash.js
@@ -0,0 +1,4 @@
+import fp from 'lodash/fp';
+import fpEx from './lodashFpEx';
+
+export default fp.mixin(fpEx);
diff --git a/com.twin.app.shoptime/src/utils/lodashFpEx.js b/com.twin.app.shoptime/src/utils/lodashFpEx.js
new file mode 100644
index 00000000..cb136ef3
--- /dev/null
+++ b/com.twin.app.shoptime/src/utils/lodashFpEx.js
@@ -0,0 +1,468 @@
+import fp from 'lodash/fp';
+
+/**
+ * 대상 인자가 promise(thenable)인지 여부
+ * @param {*} x
+ */
+const isPromise = (x) => fp.isFunction(fp.get('then', x)) && fp.isFunction(fp.get('catch', x));
+
+const fnPromisify = (fn, ...args) => {
+  return new Promise((resolve, reject) => {
+    try {
+      resolve(fn(...args));
+    } catch (e) {
+      reject(e);
+    }
+  });
+};
+
+/**
+ * 대상 인자를 promise로 lift (like monad lift)
+ */
+const promisify = (a, ...args) => {
+  const cond = fp.cond([
+    [fp.isFunction, () => fnPromisify(a, ...args)],
+    [isPromise, fp.identity],
+    [fp.T, (a) => Promise.resolve(a)],
+  ]);
+  const result = cond(a);
+
+  return result;
+};
+
+/**
+ * promise가 또다른 promise를 resolve하는 경우, promise의 중첩을 제거하기 위한 helper 함수
+ *
+ * @param {*} thenable
+ */
+const flatPromise = (thenable) =>
+  isPromise(thenable) ? thenable.then((x) => flatPromise(x)) : thenable;
+
+/**
+ * lodash 형태의 promise then
+ */
+const then = fp.curry((fn, thenable) => promisify(thenable).then(flatPromise(fn)));
+
+/**
+ * lodash 형태의 promise catch
+ */
+const otherwise = fp.curry((fn, thenable) => promisify(thenable).catch(flatPromise(fn)));
+
+/**
+ * lodash 형태의 promise finally
+ */
+const _finally = fp.curry((fn, thenable) => promisify(thenable).finally(flatPromise(fn)));
+
+/**
+ * invert boolean
+ * @param {*} x
+ */
+const not = (x) => !x;
+
+/**
+ * 대상이 비어있지 않은지 여부
+ */
+const isNotEmpty = fp.pipe(fp.isEmpty, not);
+
+/**
+ * 대상 인자를 boolean 타입으로 변환\
+ * (예외)'true'문자열이면 true, 'false'문자열이면 false
+ *
+ * @param {*} a
+ */
+const toBool = (a) =>
+  fp.cond([
+    [fp.equals('true'), fp.T],
+    [fp.equals('false'), fp.F],
+    [fp.T, (a) => !!a],
+  ])(a);
+
+/**
+ * 삼항식 helper 함수\
+ * (isTrue가 true면 t(실행)반환, false면 f(실행)반환)
+ */
+const ternary = fp.curry((evaluator, trueHandler, falseHandler, a) => {
+  const executor = fp.curry((t, f, a, isTrue) => {
+    const result = isTrue ? (fp.isFunction(t) ? t(a) : t) : fp.isFunction(f) ? f(a) : f;
+    return result;
+  });
+  const getEvaluator = (fn) => (fp.isNil(fn) ? fp.identity : fn);
+  const result = executor(trueHandler, falseHandler, a, getEvaluator(evaluator)(a));
+
+  return result;
+});
+
+/**
+ * a인자가 t타입인지 여부
+ */
+const instanceOf = fp.curry((t, a) => a instanceof t);
+
+/**
+ * 대상 문자열을 pascalcase 문자열로 변환
+ */
+const pascalCase = fp.pipe(fp.camelCase, fp.upperFirst);
+
+/**
+ * (collection) fp.map의 비동기 함수\
+ * mapper 함수로 비동기 함수를 받아서 처리해준다.
+ */
+const mapAsync = fp.curry(async (asyncMapper, arr) => {
+  const composer = fp.pipe(
+    fp.flatMapDeep(fp.pipe(asyncMapper, promisify)),
+    async (a) => await Promise.all(a),
+  );
+  const result = await composer(arr);
+
+  return result;
+});
+
+/**
+ * (collection) fp.filter의 비동기 함수\
+ * 필터함수로 비동기 함수를 받아서 처리해준다.
+ */
+const filterAsync = fp.curry(async (asyncFilter, arr) => {
+  const composer = fp.pipe(
+    mapAsync(async (item) => ((await asyncFilter(item)) ? item : false)),
+    then(fp.filter(fp.pipe(fp.equals(false), not))),
+  );
+  const result = await composer(arr);
+
+  return result;
+});
+/**
+ * (collection) fp.find의 비동기 함수
+ */
+const findAsync = fp.curry(async (asyncFn, arr) => {
+  const composer = fp.pipe(
+    mapAsync(asyncFn),
+    then(fp.indexOf(true)),
+    then((idx) => fp.get(`[${idx}]`, arr)),
+    otherwise(fp.always(undefined)),
+  );
+  const result = await composer(arr);
+
+  return result;
+});
+
+/**
+ * asyncFn의 시작은 await accPromise가 되어야 한다.\
+ * 순차적으로 실행된다.\
+ * (ex 300ms이 걸리는 5개의 promise가 있다면, 최소 1500ms+alpah의 시간이 소요된다.\
+ * 상기의 mapAsync의 경우 300+alpah의 시간만 소요된다.(Promise.all과 Promise.resolve의 차이))
+ */
+const reduceAsync = fp.curry((asyncFn, initAcc, dest) => {
+  const initAccPromise = Promise.resolve(initAcc);
+  const result = fp.reduce(asyncFn, initAccPromise, dest);
+  return result;
+});
+
+/**
+ * 비동기 forEach
+ * 실행함수로 비동기 함수를 받아서 처리해준다
+ * 순차실행
+ */
+const forEachAsync = fp.curry(async (cb, collection) => {
+  const loopResults = [];
+  const iterator = fp.entries(collection);
+
+  for (const e of iterator) {
+    loopResults.push(await cb(e[1], e[0]));
+  }
+
+  return loopResults;
+});
+
+/**
+ * value로 object key 조회
+ */
+const key = fp.curry((a, v) => {
+  const composer = fp.pipe(
+    fp.entries,
+    fp.find(([k, val]) => fp.equals(v, val)),
+    fp.head,
+  );
+  const result = composer(a);
+  return result;
+});
+
+/**
+ * 대상 문자열이 json형식 문자열인지 여부
+ * @param {String} a
+ */
+const isJson = (a) => {
+  const composer = fp.pipe(fp.attempt, fp.isError);
+  return fp.isString(a) && !composer(() => JSON.parse(a));
+};
+
+/**
+ * shallow freeze 보완
+ * (대상 object의 refence 타입의 properties까지 object.freeze 처리)
+ * @param {*} obj
+ */
+const deepFreeze = (obj) => {
+  const freezeRecursively = (v) => (isRef(v) && !Object.isFrozen(v) ? deepFreeze(v) : v);
+  const composer = fp.pipe(Object.freeze, fp.forOwn(freezeRecursively));
+  const result = composer(obj);
+
+  return result;
+};
+
+const transformObjectKey = fp.curry((transformFn, dest) => {
+  const convertRecursively = (dest) => {
+    const convertTo = (o) => {
+      const composer = fp.pipe(
+        fp.entries,
+        fp.reduce((acc, [k, v]) => {
+          const cond = fp.cond([
+            [fp.isPlainObject, convertTo],
+            [fp.isArray, (v) => v.map(cond)],
+            [fp.T, (a) => a],
+          ]);
+          const transformedKey = transformFn(k);
+          if (!fp.has(transformedKey, acc)) {
+            acc[transformedKey] = cond(v);
+            return acc;
+          } else {
+            throw new Error(
+              `${transformedKey} already exist. duplicated property name is not supported.`,
+            );
+          }
+        }, {}),
+      );
+      const result = composer(o);
+      return result;
+    };
+    const result = convertTo(dest);
+    return result;
+  };
+
+  const result = fp.isObject(dest) || fp.isArray(dest) ? convertRecursively(dest) : dest;
+
+  return result;
+});
+
+/**
+ * 대상 object의 property key문자열을 camelcase 문자열로 변환
+ */
+const toCamelcase = transformObjectKey(fp.camelCase);
+
+/**
+ * 대상 object의 property key문자열을 snakecase 문자열로 변환
+ */
+const toSnakecase = transformObjectKey(fp.snakeCase);
+const toPascalcase = transformObjectKey(pascalCase);
+
+/**
+ * date형식 문자열 여부
+ * @param {string} str date형식 문자열
+ */
+const isDatetimeString = (str) => isNaN(str) && !isNaN(Date.parse(str));
+/**
+ * applicative functor pattern 구현체
+ * (주로 fp.pipe함수에서 함수의 인자 순서를 변경하기 위해 사용)
+ */
+const ap = fp.curry((a, curried) => curried(a));
+
+/**
+ * 대상 인자가 undefined 또는 null이 아닌지 여부
+ */
+const isNotNil = fp.pipe(fp.isNil, not);
+
+/**
+ * a인자를 인자로, evaluator함수 실행,
+ * true면 trueHandler에 a인자 대입
+ * false면 a 반환
+ */
+const ifT = fp.curry((evaluator, trueHandler, a) => {
+  const isValidParams = fp.every(fp.isFunction, [evaluator, trueHandler]);
+
+  if (isValidParams) {
+    return fp.pipe(evaluator, fp.equals(true))(a) ? trueHandler(a) : a;
+  } else {
+    throw new Error('invalid parameter');
+  }
+});
+
+/**
+ * a인자를 인자로, evaluator함수 실행,
+ * false면 falseHandler에 a인자 대입
+ * true면 a 반환
+ */
+const ifF = fp.curry((evaluator, falseHandler, a) => {
+  const isValidParams = fp.every(fp.isFunction, [evaluator, falseHandler]);
+
+  if (isValidParams) {
+    return fp.pipe(evaluator, fp.equals(false))(a) ? falseHandler(a) : a;
+  } else {
+    throw new Error('invalid parameter(s)');
+  }
+});
+
+/**
+ * arr인자 배열에 a인자가 포함되지 않았는지 여부
+ */
+const notIncludes = fp.curry((a, arr) => {
+  const composer = fp.pipe(fp.includes, ap(arr), not);
+  const result = composer(a);
+
+  return result;
+});
+
+/**
+ * a인자와 b인자가 다른지 여부 (deep equal)
+ */
+const notEquals = fp.curry((a, b) => fp.pipe(fp.equals(a), not)(b));
+
+/**
+ * arr인자의 idx인자의 index에 해당하는 요소 제거
+ */
+const removeByIndex = fp.curry((idx, arr) => {
+  if (fp.isArray(arr)) {
+    const cloned = fp.cloneDeep(arr);
+    cloned.splice(fp.toNumber(idx), 1);
+
+    return cloned;
+  }
+  return arr;
+});
+
+/**
+ * arr 인자의 마지막 요소 제거 (immutable)
+ *
+ * @param {*} arr
+ */
+const removeLast = (a) => {
+  const nextA = fp.cloneDeep(a);
+  if (fp.isArray(a)) {
+    nextA.pop();
+  }
+  if (fp.isString(a)) {
+    return nextA.substring(0, fp.size(a) - 1);
+  }
+  return nextA;
+};
+
+/**
+ * fp.concat alias
+ */
+const append = fp.concat;
+
+/**
+ * array 인자의 (index상)앞쪽에 value인자를 추가
+ */
+const prepend = fp.curry((array, value) =>
+  fp.isArray(value) ? fp.concat(value, array) : fp.concat([value], array),
+);
+
+/**
+ * key(index)를 포함한 fp.map
+ */
+const mapWithKey = fp.curry((f, a) => fp.map.convert({ cap: false })(f, a));
+
+/**
+ * key(index)를 포함한 fp.forEach
+ */
+const forEachWithKey = fp.curry((f, a) => fp.forEach.convert({ cap: false })(f, a));
+
+/**
+ * key(index)를 포함한 reduce
+ */
+const reduceWithKey = fp.curry((f, acc, a) => fp.reduce.convert({ cap: false })(f, acc, a));
+
+/**
+ * null, undefined, Boolean, Number, String
+ *
+ */
+const isVal = (a) => fp.isNil(a) || fp.isBoolean(a) || fp.isNumber(a) || fp.isString(a);
+
+/**
+ * Array, Object, Function
+ */
+const isRef = fp.pipe(isVal, not);
+
+const isFalsy = (a) => {
+  return fp.isNil(a) || fp.some(fp.equals(a), [0, -0, NaN, false, '']);
+};
+
+const isTruthy = (a) => !isFalsy(a);
+
+/**
+ * fp.getOr override
+ *
+ * fp.getOr의 반환값이 null인 경우, 기본값 반환되게 수정한 버전
+ * circular dependency 때문에 closure로 작성
+ */
+const getOr = (({ curry, getOr }) => {
+  const _getOr = curry((defaultValue, path, target) => {
+    const val = fp.get(path, target);
+    return fp.isNil(val) ? defaultValue : val;
+  });
+  return _getOr;
+})(fp);
+
+export default {
+  mapAsync,
+  filterAsync,
+  reduceAsync,
+  findAsync,
+  forEachAsync,
+  promisify,
+  then,
+  andThen: then,
+  otherwise,
+  catch: otherwise,
+  finally: _finally,
+
+  isPromise,
+  isNotEmpty,
+  isNotNil,
+  isJson,
+  notEquals,
+  isNotEqual: notEquals,
+  isVal,
+  isPrimitive: isVal,
+  isRef,
+  isReference: isRef,
+  not,
+  notIncludes,
+  toBool,
+
+  deepFreeze,
+  key,
+  keyByVal: key,
+
+  // string
+  transformObjectKey,
+  toCamelcase,
+  toCamelKey: toCamelcase,
+  toSnakecase,
+  toSnakeKey: toSnakecase,
+  toPascalcase,
+  pascalCase,
+  isDatetimeString,
+
+  ap,
+  instanceOf,
+
+  ternary,
+  ifT,
+  ifF,
+
+  // array
+  removeByIndex,
+  removeByIdx: removeByIndex,
+  removeLast,
+  append,
+  prepend,
+
+  mapWithKey,
+  mapWithIdx: mapWithKey,
+  forEachWithKey,
+  forEachWithIdx: forEachWithKey,
+  reduceWithKey,
+  reduceWithIdx: reduceWithKey,
+  isFalsy,
+  isTruthy,
+
+  getOr,
+};