feat: 카카오메시지 전송 로직 추가

src/main/java/com/software/ott/common/properties/KakaoProperties.java

@@ -7,6 +7,7 @@ public record KakaoProperties(
         String clientId,
         String redirectUri,
         String devRedirectUri,
-        String frontUriWithoutHttp
+        String frontUriWithoutHttp,
+        String frontUrl
 ) {
 }

src/main/java/com/software/ott/common/service/KakaoMessageService.java

@@ -0,0 +1,89 @@
+package com.software.ott.common.service;
+
+import com.software.ott.auth.service.KakaoTokenService;
+import com.software.ott.common.properties.KakaoProperties;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.http.RequestEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
+
+import java.net.URI;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
+@Service
+@RequiredArgsConstructor
+public class KakaoMessageService {
+
+    private static final String KAKAO_SEND_ME_BASE_URL = "https://kapi.kakao.com/v2/api/talk/memo/default/send";
+    private static final String DEFAULT_IMAGE_URL = "https://ifh.cc/g/mjb5nn.jpg";
+
+    private final KakaoTokenService kakaoTokenService;
+    private final RestTemplate restTemplate;
+    private final KakaoProperties kakaoProperties;
+
+    public void sendRecommendMessage(String email, String senderName, String posterUrl, String contentName, String contentGenre, String contentType, String reason) {
+        String accessToken = kakaoTokenService.getValidAccessTokenInServer(email);
+
+        if (accessToken == null) {
+            return;
+        }
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
+        headers.setBearerAuth(accessToken);
+
+        if (posterUrl.isEmpty()) {
+            posterUrl = DEFAULT_IMAGE_URL;
+        }
+
+        String templateObject = String.format(
+                "{" +
+                        "\"object_type\": \"feed\"," +
+                        "\"content\": {" +
+                        "\"title\": \"%s 님께서 보내신 추천 컨텐츠!\"," +
+                        "\"description\": \"저희 서비스를 이용해주셔서 감사드립니다.\"," +
+                        "\"image_url\": \"%s\"," +
+                        "\"image_width\": 640," +
+                        "\"image_height\": 640," +
+                        "\"link\": {" +
+                        "\"web_url\": \"%s\"," +
+                        "\"mobile_web_url\": \"%s\"" +
+                        "}" +
+                        "}," +
+                        "\"item_content\": {" +
+                        "\"items\": [" +
+                        "{\"item\": \"추천자\", \"item_op\": \"%s 님\"}," +
+                        "{\"item\": \"제목\", \"item_op\": \"%s\"}," +
+                        "{\"item\": \"장르\", \"item_op\": \"%s\"}," +
+                        "{\"item\": \"타입\", \"item_op\": \"%s\"}," +
+                        "{\"item\": \"추천 이유\", \"item_op\": \"%s\"}" +
+                        "]" +
+                        "}," +
+                        "\"buttons\": [" +
+                        "{" +
+                        "\"title\": \"서비스 이용하기\"," +
+                        "\"link\": {" +
+                        "\"web_url\": \"%s\"," +
+                        "\"mobile_web_url\": \"%s\"" +
+                        "}" +
+                        "}" +
+                        "]" +
+                        "}",
+                senderName, posterUrl, kakaoProperties.frontUrl(), kakaoProperties.frontUrl(), senderName, contentName
+                , contentGenre, contentType, reason, kakaoProperties.frontUrl(), kakaoProperties.frontUrl()
+        );
+
+
+        String encodedTemplateObject = URLEncoder.encode(templateObject, StandardCharsets.UTF_8);
+
+        RequestEntity<String> request = new RequestEntity<>(
+                "template_object=" + encodedTemplateObject,
+                headers, HttpMethod.POST, URI.create(KAKAO_SEND_ME_BASE_URL));
+
+        restTemplate.exchange(request, String.class);
+    }
+}

src/main/java/com/software/ott/friend/service/FriendRecommendService.java

@@ -2,6 +2,7 @@
 
 import com.software.ott.common.exception.BadRequestException;
 import com.software.ott.common.exception.NotFoundException;
+import com.software.ott.common.service.KakaoMessageService;
 import com.software.ott.content.entity.Content;
 import com.software.ott.content.repository.ContentRepository;
 import com.software.ott.friend.dto.FriendRecommendResponse;
@@ -27,6 +28,7 @@ public class FriendRecommendService {
     private final MemberRepository memberRepository;
     private final FriendRepository friendRepository;
     private final ContentRepository contentRepository;
+    private final KakaoMessageService kakaoMessageService;
 
     @Transactional
     public void sendContentRecommend(Long memberId, Long friendRequestId, RecommendContentRequest recommendContentRequest) {
@@ -68,6 +70,8 @@ public void sendContentRecommend(Long memberId, Long friendRequestId, RecommendC
                         .recommendContent(content)
                         .reason(recommendContentRequest.reason())
                         .build());
+
+        kakaoMessageService.sendRecommendMessage(member.getEmail(), member.getName(), content.getPosterPath(), content.getTitle(), content.getListedIn(), content.getType(), recommendContentRequest.reason());
     }
 
     @Transactional(readOnly = true)