Feat: #24 객체 동결 기능과 공통 validation 기능 추가

src/utils/Validator.tsx

@@ -0,0 +1,15 @@
+export default class Validator {
+  public static isEmptyString(value: string) {
+    return value.trim().length === 0;
+  }
+
+  // ToDo: 정말로 공용 Validation 기능인가 생각해보기
+  public static isDuplicatedName(nameList: string[], name: string, ignoreCase: boolean = true) {
+    if (ignoreCase) {
+      const lowerCaseNameList = nameList.map((n) => n.toLowerCase().trim());
+      const lowerCaseName = name.toLowerCase().trim();
+      return lowerCaseNameList.includes(lowerCaseName);
+    }
+    return nameList.includes(name);
+  }
+}

src/utils/deepFreeze.ts

@@ -0,0 +1,6 @@
+export const deepFreeze = <T extends object>(obj: T) => {
+  Object.keys(obj).forEach((prop) => {
+    if (typeof prop === 'object' && !Object.isFrozen(prop)) deepFreeze(prop);
+  });
+  return Object.freeze(obj);
+};