Feat: Controller 객체 구현

src/main/java/be/gyu/urlShortener/controller/MainController.java

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+package be.gyu.urlShortener.controller;
+
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import be.gyu.urlShortener.service.MainService;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+@Controller
+public class MainController {
+    @Autowired
+    private MainService mainService;
+    
+    /**
+     * Main Index 페이지 매핑 메소드
+     * @return index 페이지의 View Name을 반환
+     */
+    @GetMapping("/")
+    public String getIndex(){
+        return "index";
+    }
+
+    /**
+     * 입력한 원본 URL을 검증 및 단축 후, 결과 반환 메소드
+     * @param request Request 객체
+     * @return 결과 값을 담아서 ResponseEntity<Map<String,String>> 객체로 반환 (json 형태로 전송)
+     */
+    @PostMapping("/short")
+    @ResponseBody
+    public ResponseEntity<Map<String,String>> postGenerateShortUrl(HttpServletRequest request){
+        // 서비스 로직 메소드 호출
+        Map<String,String> resultMap=mainService.generateShortUrl(request.getParameter("url"));
+
+        if(!resultMap.containsKey("status") || resultMap.get("status").equals("failed")){
+            resultMap.put("status","failed");
+            resultMap.put("message","생성 실패");
+        }
+
+        return ResponseEntity.ok(resultMap);
+    }
+
+    /**
+     * 단축 URL 조회 및 원본 URL로 Re-Direct 처리 메소드
+     * @param shortUrl 단축 URL
+     * @param response Re-Direct 응답 처리를 위한 매개변수
+     */
+    @GetMapping("/{shortUrl}")
+    public void getShortUrl(@PathVariable(name="shortUrl") String shortUrl, HttpServletResponse response){
+        String originalUrl=mainService.getOriginalUrl(shortUrl);
+        response.setStatus(HttpStatus.MOVED_PERMANENTLY.value());
+        response.addHeader("Location",originalUrl);
+    }
+}