From 84e824c92c1badc271ac7a641796630d1d229110 Mon Sep 17 00:00:00 2001
From: okojess <ixy1364@gmail.com>
Date: Mon, 20 Oct 2025 22:47:20 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EB=AC=B8=EC=9E=90=EC=97=B4=20=EB=8D=A7?=
 =?UTF-8?q?=EC=85=88=20=EA=B3=84=EC=82=B0=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md         |  9 +++++++++
 src/App.js        | 16 ++++++++++++++++
 src/Calculator.js | 15 +++++++++++++++
 src/Parser.js     | 15 +++++++++++++++
 src/Validator.js  | 14 ++++++++++++++
 src/js/index.js   | 36 ++++++++++++++++++++++++++++++++++++
 6 files changed, 105 insertions(+)
 create mode 100644 src/App.js
 create mode 100644 src/Calculator.js
 create mode 100644 src/Parser.js
 create mode 100644 src/Validator.js

diff --git a/README.md b/README.md
index 4d8f0b5..d47441a 100644
--- a/README.md
+++ b/README.md
@@ -53,3 +53,12 @@
 
 ## 📝 License
 This project is [MIT](https://github.com/woowacourse/javascript-calculator/blob/master/LICENSE) licensed.
+
+## 구현할 기능 목록
+
+1. 입력값 받기
+2. 문자열에서 숫자 추출
+3. 쉼표(,) 또는 콜론(:) 구분자 처리
+4. 커스텀 구분자 처리 (예: //;\n1;2;3)
+5. 잘못된 입력 시 [ERROR] 출력
+6. 합계 계산 및 결과 출력
diff --git a/src/App.js b/src/App.js
new file mode 100644
index 0000000..928d927
--- /dev/null
+++ b/src/App.js
@@ -0,0 +1,16 @@
+import Calculator from "./Calculator.js";
+
+class App {
+  run() {
+    const input = prompt("덧셈할 문자열을 입력해 주세요."); // 사용자 입력
+    try {
+      const result = Calculator.add(input);
+      console.log(`결과 : ${result}`);
+    } catch (error) {
+      console.error("[ERROR]", error.message);
+    }
+  }
+}
+
+const app = new App();
+app.run();
diff --git a/src/Calculator.js b/src/Calculator.js
new file mode 100644
index 0000000..6988549
--- /dev/null
+++ b/src/Calculator.js
@@ -0,0 +1,15 @@
+import Parser from "./Parser.js";
+import Validator from "./Validator.js";
+
+class Calculator {
+  static add(input) {
+    if (!input) return 0;
+
+    const numbers = Parser.parse(input);
+    Validator.check(numbers);
+
+    return numbers.reduce((acc, cur) => acc + cur, 0);
+  }
+}
+
+export default Calculator;
diff --git a/src/Parser.js b/src/Parser.js
new file mode 100644
index 0000000..a9d505b
--- /dev/null
+++ b/src/Parser.js
@@ -0,0 +1,15 @@
+class Parser {
+  static parse(text) {
+    // 커스텀 구분자 패턴 확인: //;\n1;2;3
+    const customDelimiterMatch = text.match(/^\/\/(.)\\n(.*)$/);
+    if (customDelimiterMatch) {
+      const [, delimiter, numbers] = customDelimiterMatch;
+      return numbers.split(delimiter).map(Number);
+    }
+
+    // 기본 구분자(, :) 처리
+    return text.split(/,|:/).map(Number);
+  }
+}
+
+export default Parser;
diff --git a/src/Validator.js b/src/Validator.js
new file mode 100644
index 0000000..4edb2bc
--- /dev/null
+++ b/src/Validator.js
@@ -0,0 +1,14 @@
+class Validator {
+  static check(numbers) {
+    numbers.forEach((num) => {
+      if (isNaN(num)) {
+        throw new Error("숫자가 아닌 값이 포함되어 있습니다.");
+      }
+      if (num < 0) {
+        throw new Error("음수는 입력할 수 없습니다.");
+      }
+    });
+  }
+}
+
+export default Validator;
diff --git a/src/js/index.js b/src/js/index.js
index e69de29..248cd3c 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -0,0 +1,36 @@
+const DEFAULT_DELIMITERS = [",", ":"];
+
+function calculate(input) {
+  if (!input) return 0;
+
+  const { delimiters, numbersString } = extractDelimiter(input);
+  const numbers = splitAndConvert(numbersString, delimiters);
+  validate(numbers);
+
+  return numbers.reduce((sum, num) => sum + num, 0);
+}
+
+function extractDelimiter(input) {
+  const customDelimiterPattern = /^\/\/(.)\n(.*)$/;
+  const match = input.match(customDelimiterPattern);
+
+  if (match) {
+    return { delimiters: [match[1]], numbersString: match[2] };
+  }
+
+  return { delimiters: DEFAULT_DELIMITERS, numbersString: input };
+}
+
+function splitAndConvert(str, delimiters) {
+  const regex = new RegExp(`[${delimiters.join("")}]`);
+  return str.split(regex).map(Number);
+}
+
+function validate(numbers) {
+  numbers.forEach((n) => {
+    if (isNaN(n)) throw new Error("[ERROR] 숫자가 아닌 값이 있습니다.");
+    if (n < 0) throw new Error("[ERROR] 음수는 입력할 수 없습니다.");
+  });
+}
+
+export default calculate;