editor 추가 서비스 구현

src/main/java/com/example/daemawiki/domain/editor/service/AddEditor.java

@@ -0,0 +1,40 @@
+package com.example.daemawiki.domain.editor.service;
+
+import com.example.daemawiki.domain.document.component.facade.DocumentFacade;
+import com.example.daemawiki.domain.document.repository.DocumentRepository;
+import com.example.daemawiki.domain.editor.dto.AddEditorRequest;
+import com.example.daemawiki.domain.editor.model.Editor;
+import com.example.daemawiki.domain.user.service.facade.UserFacade;
+import com.example.daemawiki.global.exception.h403.NoPermissionUserException;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+@Service
+public class AddEditor {
+    private final UserFacade userFacade;
+    private final DocumentFacade documentFacade;
+    private final DocumentRepository documentRepository;
+
+    public AddEditor(UserFacade userFacade, DocumentFacade documentFacade, DocumentRepository documentRepository) {
+        this.userFacade = userFacade;
+        this.documentFacade = documentFacade;
+        this.documentRepository = documentRepository;
+    }
+
+    public Mono<Void> execute(AddEditorRequest request) {
+        return userFacade.currentUser()
+                .flatMap(user -> documentFacade.findDocumentById(user.getDocumentId())
+                        .filter(document -> document.getEditor().getCreatedUser().id().equals(user.getId()))
+                        .switchIfEmpty(Mono.error(NoPermissionUserException.EXCEPTION))
+                        .zipWith(userFacade.findByEmailNotNull(request.email()), (document, user2) -> {
+                            document.getEditor().getCanEdit().add(Editor.builder()
+                                            .user(user2.getEmail())
+                                            .id(user2.getId())
+                                    .build());
+                            return document;
+                        })
+                        .flatMap(documentRepository::save))
+                .then();
+    }
+
+}