Communication: Add FAQs to Artemis

jest.config.js

@@ -102,10 +102,10 @@ module.exports = {
     coverageThreshold: {
         global: {
             // TODO: in the future, the following values should increase to at least 90%
-            statements: 87.35,
-            branches: 73.57,
-            functions: 81.91,
-            lines: 87.41,
+            statements: 87.36,
+            branches: 73.52,
+            functions: 81.9,
+            lines: 87.42,
         },
     },
     coverageReporters: ['clover', 'json', 'lcov', 'text-summary'],

src/main/java/de/tum/cit/aet/artemis/communication/domain/Faq.java

@@ -0,0 +1,99 @@
+package de.tum.cit.aet.artemis.communication.domain;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import jakarta.persistence.CollectionTable;
+import jakarta.persistence.Column;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import org.hibernate.annotations.Cache;
+import org.hibernate.annotations.CacheConcurrencyStrategy;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+import de.tum.cit.aet.artemis.core.domain.AbstractAuditingEntity;
+import de.tum.cit.aet.artemis.core.domain.Course;
+
+/**
+ * A FAQ.
+ */
+@Entity
+@Table(name = "faq")
+@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
+@JsonInclude(JsonInclude.Include.NON_EMPTY)
+public class Faq extends AbstractAuditingEntity {
+
+    @Column(name = "question_title")
+    private String questionTitle;
+
+    @Column(name = "question_answer")
+    private String questionAnswer;
+
+    @ElementCollection(fetch = FetchType.EAGER)
+    @CollectionTable(name = "faq_category", joinColumns = @JoinColumn(name = "faq_id"))
+    @Column(name = "category")
+    private Set<String> categories = new HashSet<>();
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "faq_state")
+    private FaqState faqState;
+
+    @ManyToOne
+    @JsonIgnoreProperties(value = { "faqs" }, allowSetters = true)
+    private Course course;
+
+    public String getQuestionTitle() {
+        return questionTitle;
+    }
+
+    public void setQuestionTitle(String questionTitle) {
+        this.questionTitle = questionTitle;
+    }
+
+    public String getQuestionAnswer() {
+        return questionAnswer;
+    }
+
+    public void setQuestionAnswer(String questionAnswer) {
+        this.questionAnswer = questionAnswer;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    public void setCourse(Course course) {
+        this.course = course;
+    }
+
+    public Set<String> getCategories() {
+        return categories;
+    }
+
+    public void setCategories(Set<String> categories) {
+        this.categories = categories;
+    }
+
+    public FaqState getFaqState() {
+        return faqState;
+    }
+
+    public void setFaqState(FaqState faqState) {
+        this.faqState = faqState;
+    }
+
+    @Override
+    public String toString() {
+        return "Faq{" + "id=" + getId() + ", questionTitle='" + getQuestionTitle() + "'" + ", questionAnswer='" + getQuestionAnswer() + "'" + ", faqState='" + getFaqState() + "}";
+    }
+
+}

src/main/java/de/tum/cit/aet/artemis/communication/domain/FaqState.java

@@ -0,0 +1,5 @@
+package de.tum.cit.aet.artemis.communication.domain;
+
+public enum FaqState {
+    ACCEPTED, REJECTED, PROPOSED
+}

src/main/java/de/tum/cit/aet/artemis/communication/dto/FaqDTO.java

@@ -0,0 +1,17 @@
+package de.tum.cit.aet.artemis.communication.dto;
+
+import java.util.Set;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+import de.tum.cit.aet.artemis.communication.domain.Faq;
+import de.tum.cit.aet.artemis.communication.domain.FaqState;
+
+@JsonInclude(JsonInclude.Include.NON_EMPTY)
+public record FaqDTO(Long id, String questionTitle, String questionAnswer, Set<String> categories, FaqState faqState) {
+
+    public FaqDTO(Faq faq) {
+        this(faq.getId(), faq.getQuestionTitle(), faq.getQuestionAnswer(), faq.getCategories(), faq.getFaqState());
+    }
+
+}

src/main/java/de/tum/cit/aet/artemis/communication/repository/FaqRepository.java

@@ -0,0 +1,37 @@
+package de.tum.cit.aet.artemis.communication.repository;
+
+import static de.tum.cit.aet.artemis.core.config.Constants.PROFILE_CORE;
+
+import java.util.Set;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Transactional;
+
+import de.tum.cit.aet.artemis.communication.domain.Faq;
+import de.tum.cit.aet.artemis.core.repository.base.ArtemisJpaRepository;
+
+/**
+ * Spring Data repository for the Faq entity.
+ */
+@Profile(PROFILE_CORE)
+@Repository
+public interface FaqRepository extends ArtemisJpaRepository<Faq, Long> {
+
+    Set<Faq> findAllByCourseId(Long courseId);
+
+    @Query("""
+            SELECT DISTINCT faq.categories
+            FROM Faq faq
+            WHERE faq.course.id = :courseId
+            """)
+    Set<String> findAllCategoriesByCourseId(@Param("courseId") Long courseId);
+
+    @Transactional
+    @Modifying
+    void deleteAllByCourseId(Long courseId);
+
+}

src/main/java/de/tum/cit/aet/artemis/communication/web/FaqResource.java

@@ -0,0 +1,194 @@
+package de.tum.cit.aet.artemis.communication.web;
+
+import static de.tum.cit.aet.artemis.core.config.Constants.PROFILE_CORE;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Profile;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+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.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import de.tum.cit.aet.artemis.communication.domain.Faq;
+import de.tum.cit.aet.artemis.communication.dto.FaqDTO;
+import de.tum.cit.aet.artemis.communication.repository.FaqRepository;
+import de.tum.cit.aet.artemis.core.domain.Course;
+import de.tum.cit.aet.artemis.core.exception.BadRequestAlertException;
+import de.tum.cit.aet.artemis.core.repository.CourseRepository;
+import de.tum.cit.aet.artemis.core.security.Role;
+import de.tum.cit.aet.artemis.core.security.annotations.EnforceAtLeastInstructor;
+import de.tum.cit.aet.artemis.core.security.annotations.EnforceAtLeastStudent;
+import de.tum.cit.aet.artemis.core.service.AuthorizationCheckService;
+import de.tum.cit.aet.artemis.core.util.HeaderUtil;
+
+/**
+ * REST controller for managing Faqs.
+ */
+@Profile(PROFILE_CORE)
+@RestController
+@RequestMapping("api/")
+public class FaqResource {
+
+    private static final Logger log = LoggerFactory.getLogger(FaqResource.class);
+
+    private static final String ENTITY_NAME = "faq";
+
+    @Value("${jhipster.clientApp.name}")
+    private String applicationName;
+
+    private final CourseRepository courseRepository;
+
+    private final AuthorizationCheckService authCheckService;
+
+    private final FaqRepository faqRepository;
+
+    public FaqResource(CourseRepository courseRepository, AuthorizationCheckService authCheckService, FaqRepository faqRepository) {
+
+        this.courseRepository = courseRepository;
+        this.authCheckService = authCheckService;
+        this.faqRepository = faqRepository;
+    }
+
+    /**
+     * POST /courses/:courseId/faqs : Create a new faq.
+     *
+     * @param faq      the faq to create *
+     * @param courseId the id of the course the faq belongs to
+     * @return the ResponseEntity with status 201 (Created) and with body the new faq, or with status 400 (Bad Request)
+     *         if the faq has already an ID or if the faq course id does not match with the path variable
+     * @throws URISyntaxException if the Location URI syntax is incorrect
+     */
+    @PostMapping("courses/{courseId}/faqs")
+    @EnforceAtLeastInstructor
+    public ResponseEntity<FaqDTO> createFaq(@RequestBody Faq faq, @PathVariable Long courseId) throws URISyntaxException {
+        log.debug("REST request to save Faq : {}", faq);
+        if (faq.getId() != null) {
+            throw new BadRequestAlertException("A new faq cannot already have an ID", ENTITY_NAME, "idExists");
+        }
+
+        if (faq.getCourse() == null || !faq.getCourse().getId().equals(courseId)) {
+            throw new BadRequestAlertException("Course ID in path and FAQ do not match", ENTITY_NAME, "courseIdMismatch");
+        }
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.INSTRUCTOR, faq.getCourse(), null);
+
+        Faq savedFaq = faqRepository.save(faq);
+        FaqDTO dto = new FaqDTO(savedFaq);
+        return ResponseEntity.created(new URI("/api/courses/" + courseId + "/faqs/" + savedFaq.getId())).body(dto);
+    }
+
+    /**
+     * PUT /courses/:courseId/faqs/:faqId : Updates an existing faq.
+     *
+     * @param faq      the faq to update
+     * @param faqId    id of the faq to be updated *
+     * @param courseId the id of the course the faq belongs to
+     * @return the ResponseEntity with status 200 (OK) and with body the updated faq, or with status 400 (Bad Request)
+     *         if the faq is not valid or if the faq course id does not match with the path variable
+     */
+    @PutMapping("courses/{courseId}/faqs/{faqId}")
+    @EnforceAtLeastInstructor
+    public ResponseEntity<FaqDTO> updateFaq(@RequestBody Faq faq, @PathVariable Long faqId, @PathVariable Long courseId) {
+        log.debug("REST request to update Faq : {}", faq);
+        if (faqId == null || !faqId.equals(faq.getId())) {
+            throw new BadRequestAlertException("Id of FAQ and path must match", ENTITY_NAME, "idNull");
+        }
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.INSTRUCTOR, faq.getCourse(), null);
+        Faq existingFaq = faqRepository.findByIdElseThrow(faqId);
+        if (!Objects.equals(existingFaq.getCourse().getId(), courseId)) {
+            throw new BadRequestAlertException("Course ID of the FAQ provided courseID must match", ENTITY_NAME, "idNull");
+        }
+        Faq updatedFaq = faqRepository.save(faq);
+        FaqDTO dto = new FaqDTO(updatedFaq);
+        return ResponseEntity.ok().body(dto);
+    }
+
+    /**
+     * GET /courses/:courseId/faqs/:faqId : get the faq with the id faqId.
+     *
+     * @param faqId    the faqId of the faq to retrieve *
+     * @param courseId the id of the course the faq belongs to
+     * @return the ResponseEntity with status 200 (OK) and with body the faq, or with status 404 (Not Found)
+     */
+    @GetMapping("courses/{courseId}/faqs/{faqId}")
+    @EnforceAtLeastStudent
+    public ResponseEntity<FaqDTO> getFaq(@PathVariable Long faqId, @PathVariable Long courseId) {
+        log.debug("REST request to get faq {}", faqId);
+        Faq faq = faqRepository.findByIdElseThrow(faqId);
+        if (faq.getCourse() == null || !faq.getCourse().getId().equals(courseId)) {
+            throw new BadRequestAlertException("Course ID in path and FAQ do not match", ENTITY_NAME, "courseIdMismatch");
+        }
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.STUDENT, faq.getCourse(), null);
+        FaqDTO dto = new FaqDTO(faq);
+        return ResponseEntity.ok(dto);
+    }
+
+    /**
+     * DELETE /courses/:courseId/faqs/:faqId : delete the "id" faq.
+     *
+     * @param faqId    the id of the faq to delete
+     * @param courseId the id of the course the faq belongs to
+     * @return the ResponseEntity with status 200 (OK)
+     */
+    @DeleteMapping("courses/{courseId}/faqs/{faqId}")
+    @EnforceAtLeastInstructor
+    public ResponseEntity<Void> deleteFaq(@PathVariable Long faqId, @PathVariable Long courseId) {
+
+        log.debug("REST request to delete faq {}", faqId);
+        Faq existingFaq = faqRepository.findByIdElseThrow(faqId);
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.INSTRUCTOR, existingFaq.getCourse(), null);
+        if (!Objects.equals(existingFaq.getCourse().getId(), courseId)) {
+            throw new BadRequestAlertException("Course ID of the FAQ provided courseID must match", ENTITY_NAME, "idNull");
+        }
+        faqRepository.deleteById(faqId);
+        return ResponseEntity.ok().headers(HeaderUtil.createEntityDeletionAlert(applicationName, true, ENTITY_NAME, faqId.toString())).build();
+    }
+
+    /**
+     * GET /courses/:courseId/faqs : get all the faqs of a course
+     *
+     * @param courseId the courseId of the course for which all faqs should be returned
+     * @return the ResponseEntity with status 200 (OK) and the list of faqs in body
+     */
+    @GetMapping("courses/{courseId}/faqs")
+    @EnforceAtLeastStudent
+    public ResponseEntity<Set<FaqDTO>> getFaqForCourse(@PathVariable Long courseId) {
+        log.debug("REST request to get all Faqs for the course with id : {}", courseId);
+
+        Course course = courseRepository.findByIdElseThrow(courseId);
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.STUDENT, course, null);
+        Set<Faq> faqs = faqRepository.findAllByCourseId(courseId);
+        Set<FaqDTO> faqDTOS = faqs.stream().map(FaqDTO::new).collect(Collectors.toSet());
+        return ResponseEntity.ok().body(faqDTOS);
+    }
+
+    /**
+     * GET /courses/:courseId/faq-categories : get all the faq categories of a course
+     *
+     * @param courseId the courseId of the course for which all faq categories should be returned
+     * @return the ResponseEntity with status 200 (OK) and the list of faqs in body
+     */
+    @GetMapping("courses/{courseId}/faq-categories")
+    @EnforceAtLeastStudent
+    public ResponseEntity<Set<String>> getFaqCategoriesForCourse(@PathVariable Long courseId) {
+        log.debug("REST request to get all Faq Categories for the course with id : {}", courseId);
+
+        Course course = courseRepository.findByIdElseThrow(courseId);
+        authCheckService.checkHasAtLeastRoleInCourseElseThrow(Role.STUDENT, course, null);
+        Set<String> faqs = faqRepository.findAllCategoriesByCourseId(courseId);
+
+        return ResponseEntity.ok().body(faqs);
+    }
+}