[Feat] 레이어별 로직 추가

urlshortener/src/main/java/com/prgrms/url_shortener/controller/UrlController.java

@@ -0,0 +1,40 @@
+package com.prgrms.url_shortener.controller;
+
+import com.prgrms.url_shortener.dto.ShortenUrlRequest;
+import com.prgrms.url_shortener.dto.ShortenUrlResponse;
+import com.prgrms.url_shortener.service.UrlService;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
+@RequiredArgsConstructor
+public class UrlController {
+
+    private final UrlService urlService;
+
+    @GetMapping("/")
+    public String home(){
+        return "index";
+    }
+
+    @PostMapping("/url-shortener")
+    public String getShortenUrl(@Valid @ModelAttribute ShortenUrlRequest request, Model model) {
+        ShortenUrlResponse response = urlService.getShortUrl(request);
+        model.addAttribute("shortenUrl", response.shortenUrl());
+        model.addAttribute("requestCount", response.requestCount());
+
+        return "index";
+    }
+
+    @GetMapping("/url-shortener/{shortenUrl}")
+    public String redirectOriginUrl(@PathVariable String shortenUrl){
+        String originUrl = urlService.getOriginUrl(shortenUrl);
+        return "redirect:" + originUrl;
+    }
+}

urlshortener/src/main/java/com/prgrms/url_shortener/entity/Url.java

@@ -16,21 +16,21 @@
 public class Url {
     @Id
     @GeneratedValue(strategy = IDENTITY)
-    @Column(name = "url_name")
+    @Column(name = "url_id")
     private Long id;
 
     @Column(name = "origin_url", unique = true,  nullable = false)
     private String originUrl;
 
-    @Column(name = "short_url")
-    private String shortUrl;
-
     @Column(name = "request_count")
     private int requestCount;
 
-    public Url(String originUrl, String shortUrl) {
+    public Url(String originUrl) {
         this.originUrl = originUrl;
-        this.shortUrl = shortUrl;
-        this.requestCount = 0;
+        this.requestCount = 1;
+    }
+
+    public void increaseRequestCount(){
+        requestCount++;
     }
 }

urlshortener/src/main/java/com/prgrms/url_shortener/repository/UrlRepository.java

@@ -0,0 +1,9 @@
+package com.prgrms.url_shortener.repository;
+
+import com.prgrms.url_shortener.entity.Url;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UrlRepository extends JpaRepository<Url, Long> {
+    Optional<Url> findByOriginUrl(String originUrl);
+}

urlshortener/src/main/java/com/prgrms/url_shortener/service/UrlService.java

@@ -0,0 +1,35 @@
+package com.prgrms.url_shortener.service;
+
+import com.prgrms.url_shortener.algorithm.Base62Algorithm;
+import com.prgrms.url_shortener.dto.ShortenUrlRequest;
+import com.prgrms.url_shortener.dto.ShortenUrlResponse;
+import com.prgrms.url_shortener.entity.Url;
+import com.prgrms.url_shortener.exception.CustomException;
+import com.prgrms.url_shortener.repository.UrlRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class UrlService {
+    private final UrlRepository urlRepository;
+
+    @Transactional
+    public ShortenUrlResponse getShortUrl(ShortenUrlRequest request) {
+        Url savedUrl = urlRepository.findByOriginUrl(request.originUrl())
+            .orElseGet(() -> urlRepository.save(new Url(request.originUrl())));
+        savedUrl.increaseRequestCount();
+        String shortenUrl = Base62Algorithm.encode(savedUrl.getId());
+        return new ShortenUrlResponse(shortenUrl, savedUrl.getRequestCount());
+    }
+
+    @Transactional(readOnly = true)
+    public String getOriginUrl(String shortenUrl) {
+        Long urlId = Base62Algorithm.decode(shortenUrl);
+        Url url = urlRepository.findById(urlId).orElseThrow(() -> {
+            throw new CustomException("존재하지 않는 URL입니다.");
+        });
+        return url.getOriginUrl();
+    }
+}