feat: Implement feature to get all projects from an employee (SCRUM-31) (!37)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #37
Reviewed-by: Jan Gleytenhoover <krisellp9@gmail.com>

requests/employee/getProjects.http

@@ -0,0 +1,3 @@
+GET http://localhost:8080/employees/315/projects
+Authorization: Bearer {{auth_token}}
+Content-Type: application/json

src/main/java/de/szut/lf8_starter/employee/EmployeeService.java

@@ -1,7 +1,11 @@
 package de.szut.lf8_starter.employee;
 
 import de.szut.lf8_starter.exceptionHandling.ResourceNotFoundException;
+import de.szut.lf8_starter.project.ProjectEntity;
+import de.szut.lf8_starter.project.ProjectRepository;
 import de.szut.lf8_starter.project.dto.employee.GetEmployeeDto;
+import de.szut.lf8_starter.project.dto.project.GetProjectDto;
+import de.szut.lf8_starter.project.mapper.ProjectMapper;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -9,12 +13,19 @@ import org.springframework.stereotype.Service;
 import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
+import java.util.ArrayList;
+import java.util.List;
+
 @Service
 public class EmployeeService {
     private final RestTemplate restTemplate;
+    private final ProjectRepository projectRepository;
+    private final ProjectMapper projectMapper;
 
-    public EmployeeService(RestTemplate restTemplate) {
+    public EmployeeService(RestTemplate restTemplate, ProjectRepository projectRepository, ProjectMapper projectMapper) {
         this.restTemplate = restTemplate;
+        this.projectRepository = projectRepository;
+        this.projectMapper = projectMapper;
     }
 
     public boolean employeeExists(String accessToken, Long employeeId) {
@@ -48,4 +59,15 @@ public class EmployeeService {
             throw new ResourceNotFoundException("Employee not found");
         }
     }
+
+    public List<GetProjectDto> getProjects(Long employeeId) {
+        ArrayList<ProjectEntity> projects = this.projectRepository.findAllByEmployeeId(employeeId);
+        ArrayList<GetProjectDto> projectDtos = new ArrayList<>();
+
+        for (ProjectEntity project : projects) {
+            projectDtos.add(this.projectMapper.mapToGetDto(project));
+        }
+
+        return projectDtos;
+    }
 }

src/main/java/de/szut/lf8_starter/project/ProjectRepository.java

@@ -1,8 +1,14 @@
 package de.szut.lf8_starter.project;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
+import java.util.ArrayList;
+
 @Repository
 public interface ProjectRepository extends JpaRepository<ProjectEntity, Long> {
+    @Query("SELECT p FROM ProjectEntity p WHERE :employeeId MEMBER OF p.employees")
+    ArrayList<ProjectEntity> findAllByEmployeeId(@Param("employeeId") Long employeeId);
 }

src/main/java/de/szut/lf8_starter/project/action/employee/GetProjectsFromEmployee.java

@@ -0,0 +1,39 @@
+package de.szut.lf8_starter.project.action.employee;
+
+import de.szut.lf8_starter.employee.EmployeeService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class GetProjectsFromEmployee {
+    private final EmployeeService employeeService;
+
+    public GetProjectsFromEmployee(EmployeeService employeeService) {
+        this.employeeService = employeeService;
+    }
+
+    @Operation(summary = "Get all projects from employee")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "Get all projects from employee", content = @Content),
+            @ApiResponse(responseCode = "404", description = "Employee not found", content = @Content)
+    })
+    @GetMapping("/employees/{employeeId}/projects")
+    public ResponseEntity<Object> create(
+            @PathVariable Long employeeId,
+            @RequestHeader("Authorization") String accessToken
+    ) {
+        if (!this.employeeService.employeeExists(accessToken, employeeId)) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        return new ResponseEntity<>(this.employeeService.getProjects(employeeId), HttpStatus.OK);
+    }
+}

src/test/java/de/szut/lf8_starter/integration/project/GetProjectsFromEmployeeTest.java

@@ -0,0 +1,86 @@
+package de.szut.lf8_starter.integration.project;
+
+import de.szut.lf8_starter.project.ProjectEntity;
+import de.szut.lf8_starter.project.ProjectRepository;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.*;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestTemplate;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc(addFilters = false)
+class GetProjectsFromEmployeeTest {
+    @Autowired
+    private MockMvc mockMvc;
+    @Autowired
+    private ProjectRepository projectRepository;
+    @Autowired
+    private RestTemplate restTemplate;
+
+    @Test
+    void getProjectsFromEmployeeTest() throws Exception {
+        ProjectEntity project = new ProjectEntity();
+        project.setId(1);
+        project.setComment("comment");
+        project.setContractor(1);
+        project.setContractorName("contractorName");
+        project.setEndDate(LocalDate.of(2024, 1, 1));
+        project.setLeadingEmployee(1);
+        project.setName("name");
+        project.setStartDate(LocalDate.of(2021, 1, 1));
+        project.setEmployees(List.of(315L));
+        this.projectRepository.save(project);
+
+        this.mockMvc.perform(get("/employees/315/projects")
+                        .header(HttpHeaders.AUTHORIZATION, getBearerToken())
+                ).andExpect(status().isOk())
+                .andExpect(jsonPath("$[0].id").value(1))
+                .andExpect(jsonPath("$[0].name").value("name"))
+                .andExpect(jsonPath("$[0].leading_employee").value(1))
+                .andExpect(jsonPath("$[0].employees[0]").value(315))
+                .andExpect(jsonPath("$[0].contractor").value(1))
+                .andExpect(jsonPath("$[0].contractor_name").value("contractorName"))
+                .andExpect(jsonPath("$[0].comment").value("comment"))
+                .andExpect(jsonPath("$[0].start_date").value("01.01.2021"));
+    }
+
+    @Test
+    void GetProjectsFromEmployeeShouldReturnNotFoundResponseWhenEmployeeIsNotFound() throws Exception {
+        this.mockMvc.perform(get("/employees/1111/projects")
+                .header(HttpHeaders.AUTHORIZATION, getBearerToken())
+        ).andExpect(status().isNotFound());
+    }
+
+    private String getBearerToken() {
+        String url = "https://keycloak.szut.dev/auth/realms/szut/protocol/openid-connect/token";
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
+
+        MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
+        map.add("grant_type", "password");
+        map.add("client_id", "employee-management-service");
+        map.add("username", "user");
+        map.add("password", "test");
+
+        HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(map, headers);
+
+        ResponseEntity<Map> response = this.restTemplate.exchange(url, HttpMethod.POST, request, Map.class);
+
+        return Objects.requireNonNull(response.getBody()).get("access_token").toString();
+    }
+}