feat(#4): Add versioning of application form

2025-11-08 10:15:04 +01:00
parent a8eca965dc
commit 59da40d6c0
17 changed files with 1095 additions and 124 deletions
--- a/legalconsenthub-backend/api/legalconsenthub.yml
+++ b/legalconsenthub-backend/api/legalconsenthub.yml
@@ -275,6 +275,111 @@ paths:
        "503":
          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"

+  /application-forms/{id}/versions:
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+    get:
+      summary: Get all versions of an application form
+      operationId: getApplicationFormVersions
+      tags:
+        - application-form-version
+      responses:
+        "200":
+          description: List of versions
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/ApplicationFormVersionListItemDto"
+        "400":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/BadRequest"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "404":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/NotFound"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+        "503":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
+
+  /application-forms/{id}/versions/{versionNumber}:
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+      - name: versionNumber
+        in: path
+        required: true
+        schema:
+          type: integer
+    get:
+      summary: Get specific version with full snapshot
+      operationId: getApplicationFormVersion
+      tags:
+        - application-form-version
+      responses:
+        "200":
+          description: Version details with snapshot
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ApplicationFormVersionDto"
+        "400":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/BadRequest"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "404":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/NotFound"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+        "503":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
+
+  /application-forms/{id}/versions/{versionNumber}/restore:
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+          format: uuid
+      - name: versionNumber
+        in: path
+        required: true
+        schema:
+          type: integer
+    post:
+      summary: Restore a specific version
+      operationId: restoreApplicationFormVersion
+      tags:
+        - application-form-version
+      responses:
+        "200":
+          description: Restored application form
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ApplicationFormDto"
+        "400":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/BadRequest"
+        "401":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/Unauthorized"
+        "404":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/NotFound"
+        "500":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServerError"
+        "503":
+          $ref: "https://api.swaggerhub.com/domains/smartbear-public/ProblemDetails/1.0.0#/components/responses/ServiceUnavailable"
+
  ####### Application Form Templates #######
  /application-form-templates:
    get:
@@ -1017,6 +1122,92 @@ components:
          items:
            $ref: "#/components/schemas/ApplicationFormDto"

+    ApplicationFormSnapshotDto:
+      type: object
+      required:
+        - name
+        - status
+        - organizationId
+        - sections
+      properties:
+        name:
+          type: string
+        status:
+          $ref: "#/components/schemas/ApplicationFormStatus"
+        organizationId:
+          type: string
+        sections:
+          type: array
+          items:
+            $ref: "#/components/schemas/FormElementSectionSnapshotDto"
+
+    ####### ApplicationFormVersion #######
+    ApplicationFormVersionDto:
+      type: object
+      required:
+        - id
+        - applicationFormId
+        - versionNumber
+        - name
+        - status
+        - organizationId
+        - snapshot
+        - createdBy
+        - createdAt
+      properties:
+        id:
+          type: string
+          format: uuid
+        applicationFormId:
+          type: string
+          format: uuid
+        versionNumber:
+          type: integer
+        name:
+          type: string
+        status:
+          $ref: "#/components/schemas/ApplicationFormStatus"
+        organizationId:
+          type: string
+        snapshot:
+          $ref: "#/components/schemas/ApplicationFormSnapshotDto"
+        createdBy:
+          $ref: "#/components/schemas/UserDto"
+        createdAt:
+          type: string
+          format: date-time
+
+    ApplicationFormVersionListItemDto:
+      type: object
+      required:
+        - id
+        - applicationFormId
+        - versionNumber
+        - name
+        - status
+        - organizationId
+        - createdBy
+        - createdAt
+      properties:
+        id:
+          type: string
+          format: uuid
+        applicationFormId:
+          type: string
+          format: uuid
+        versionNumber:
+          type: integer
+        name:
+          type: string
+        status:
+          $ref: "#/components/schemas/ApplicationFormStatus"
+        organizationId:
+          type: string
+        createdBy:
+          $ref: "#/components/schemas/UserDto"
+        createdAt:
+          type: string
+          format: date-time

    ####### Form #######
    FormElementSectionDto:
@@ -1044,6 +1235,23 @@ components:
          type: string
          format: uuid

+    FormElementSectionSnapshotDto:
+      type: object
+      required:
+        - title
+        - elements
+      properties:
+        title:
+          type: string
+        shortTitle:
+          type: string
+        description:
+          type: string
+        elements:
+          type: array
+          items:
+            $ref: "#/components/schemas/FormElementSnapshotDto"
+
    CreateFormElementSectionDto:
      type: object
      required:
@@ -1089,6 +1297,23 @@ components:
          type: string
          format: uuid

+    FormElementSnapshotDto:
+      type: object
+      required:
+        - type
+        - options
+      properties:
+        title:
+          type: string
+        description:
+          type: string
+        type:
+          $ref: "#/components/schemas/FormElementType"
+        options:
+          type: array
+          items:
+            $ref: "#/components/schemas/FormOptionDto"
+
    CreateFormElementDto:
      type: object
      required:
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormService.kt
@@ -1,5 +1,6 @@
 package com.betriebsratkanzlei.legalconsenthub.application_form

+import com.betriebsratkanzlei.legalconsenthub.application_form_version.ApplicationFormVersionService
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormInvalidStateException
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotCreatedException
 import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotDeletedException
@@ -8,6 +9,7 @@ import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotUpdatedExc
 import com.betriebsratkanzlei.legalconsenthub.error.FormElementSectionNotFoundException
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementMapper
 import com.betriebsratkanzlei.legalconsenthub.notification.NotificationService
+import com.betriebsratkanzlei.legalconsenthub.user.UserService
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus
 import com.betriebsratkanzlei.legalconsenthub_api.model.CreateApplicationFormDto
@@ -25,6 +27,8 @@ class ApplicationFormService(
    private val applicationFormMapper: ApplicationFormMapper,
    private val formElementMapper: FormElementMapper,
    private val notificationService: NotificationService,
+    private val versionService: ApplicationFormVersionService,
+    private val userService: UserService,
 ) {
    fun createApplicationForm(createApplicationFormDto: CreateApplicationFormDto): ApplicationForm {
        val applicationForm = applicationFormMapper.toApplicationForm(createApplicationFormDto)
@@ -35,6 +39,9 @@ class ApplicationFormService(
            throw ApplicationFormNotCreatedException(e)
        }

+        val currentUser = userService.getCurrentUser()
+        versionService.createVersion(savedApplicationForm, currentUser)
+
        return savedApplicationForm
    }

@@ -58,6 +65,9 @@ class ApplicationFormService(
            throw ApplicationFormNotUpdatedException(e, applicationFormDto.id)
        }

+        val currentUser = userService.getCurrentUser()
+        versionService.createVersion(updatedApplicationForm, currentUser)
+
        return updatedApplicationForm
    }

@@ -90,6 +100,9 @@ class ApplicationFormService(
                throw ApplicationFormNotUpdatedException(e, id)
            }

+        val currentUser = userService.getCurrentUser()
+        versionService.createVersion(savedApplicationForm, currentUser)
+
        createNotificationForOrganization(savedApplicationForm)

        return savedApplicationForm
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersion.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersion.kt
@@ -0,0 +1,47 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form_version
+
+import com.betriebsratkanzlei.legalconsenthub.application_form.ApplicationForm
+import com.betriebsratkanzlei.legalconsenthub.user.User
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.EntityListeners
+import jakarta.persistence.EnumType
+import jakarta.persistence.Enumerated
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
+import org.springframework.data.annotation.CreatedDate
+import org.springframework.data.jpa.domain.support.AuditingEntityListener
+import java.time.LocalDateTime
+import java.util.UUID
+
+@Entity
+@EntityListeners(AuditingEntityListener::class)
+class ApplicationFormVersion(
+    @Id
+    @GeneratedValue
+    var id: UUID? = null,
+    @ManyToOne
+    @JoinColumn(name = "application_form_id", nullable = false)
+    var applicationForm: ApplicationForm,
+    @Column(nullable = false)
+    var versionNumber: Int,
+    @Column(nullable = false)
+    var name: String,
+    @Enumerated(EnumType.STRING)
+    @Column(nullable = false)
+    var status: ApplicationFormStatus,
+    @Column(nullable = false)
+    var organizationId: String,
+    @Column(nullable = false, columnDefinition = "TEXT")
+    var snapshotData: String,
+    @ManyToOne
+    @JoinColumn(name = "created_by_id", nullable = false)
+    var createdBy: User,
+    @CreatedDate
+    @Column(nullable = false)
+    var createdAt: LocalDateTime? = null,
+)
+
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionController.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionController.kt
@@ -0,0 +1,52 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form_version
+
+import com.betriebsratkanzlei.legalconsenthub.application_form.ApplicationFormMapper
+import com.betriebsratkanzlei.legalconsenthub.user.UserService
+import com.betriebsratkanzlei.legalconsenthub_api.api.ApplicationFormVersionApi
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormVersionDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormVersionListItemDto
+import org.springframework.http.ResponseEntity
+import org.springframework.security.access.prepost.PreAuthorize
+import org.springframework.web.bind.annotation.RestController
+import java.util.UUID
+
+@RestController
+class ApplicationFormVersionController(
+    private val versionService: ApplicationFormVersionService,
+    private val versionMapper: ApplicationFormVersionMapper,
+    private val applicationFormMapper: ApplicationFormMapper,
+    private val userService: UserService,
+) : ApplicationFormVersionApi {
+    @PreAuthorize(
+        "hasAnyRole('CHIEF_EXECUTIVE_OFFICER', 'BUSINESS_DEPARTMENT', 'IT_DEPARTMENT', 'HUMAN_RESOURCES', 'HEAD_OF_WORKS_COUNCIL', 'WORKS_COUNCIL', 'EMPLOYEE')",
+    )
+    override fun getApplicationFormVersions(id: UUID): ResponseEntity<List<ApplicationFormVersionListItemDto>> {
+        val versions = versionService.getVersionsByApplicationFormId(id)
+        return ResponseEntity.ok(versions.map { versionMapper.toApplicationFormVersionListItemDto(it) })
+    }
+
+    @PreAuthorize(
+        "hasAnyRole('CHIEF_EXECUTIVE_OFFICER', 'BUSINESS_DEPARTMENT', 'IT_DEPARTMENT', 'HUMAN_RESOURCES', 'HEAD_OF_WORKS_COUNCIL', 'WORKS_COUNCIL', 'EMPLOYEE')",
+    )
+    override fun getApplicationFormVersion(
+        id: UUID,
+        versionNumber: Int,
+    ): ResponseEntity<ApplicationFormVersionDto> {
+        val version = versionService.getVersion(id, versionNumber)
+        return ResponseEntity.ok(versionMapper.toApplicationFormVersionDto(version))
+    }
+
+    @PreAuthorize(
+        "hasAnyRole('CHIEF_EXECUTIVE_OFFICER', 'BUSINESS_DEPARTMENT', 'IT_DEPARTMENT', 'HUMAN_RESOURCES', 'HEAD_OF_WORKS_COUNCIL', 'WORKS_COUNCIL')",
+    )
+    override fun restoreApplicationFormVersion(
+        id: UUID,
+        versionNumber: Int,
+    ): ResponseEntity<ApplicationFormDto> {
+        val currentUser = userService.getCurrentUser()
+        val restoredForm = versionService.restoreVersion(id, versionNumber, currentUser)
+        return ResponseEntity.ok(applicationFormMapper.toApplicationFormDto(restoredForm))
+    }
+}
+
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionMapper.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionMapper.kt
@@ -0,0 +1,51 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form_version
+
+import com.betriebsratkanzlei.legalconsenthub.user.UserMapper
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormSnapshotDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormVersionDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormVersionListItemDto
+import com.fasterxml.jackson.databind.ObjectMapper
+import org.springframework.stereotype.Component
+
+@Component
+class ApplicationFormVersionMapper(
+    private val userMapper: UserMapper,
+    private val objectMapper: ObjectMapper,
+) {
+    fun toApplicationFormVersionDto(version: ApplicationFormVersion): ApplicationFormVersionDto {
+        val snapshot = objectMapper.readValue(version.snapshotData, ApplicationFormSnapshotDto::class.java)
+
+        return ApplicationFormVersionDto(
+            id = version.id ?: throw IllegalStateException("ApplicationFormVersion ID must not be null!"),
+            applicationFormId =
+                version.applicationForm.id
+                    ?: throw IllegalStateException("ApplicationForm ID must not be null!"),
+            versionNumber = version.versionNumber,
+            name = version.name,
+            status = version.status,
+            organizationId = version.organizationId,
+            snapshot = snapshot,
+            createdBy = userMapper.toUserDto(version.createdBy),
+            createdAt =
+                version.createdAt
+                    ?: throw IllegalStateException("ApplicationFormVersion createdAt must not be null!"),
+        )
+    }
+
+    fun toApplicationFormVersionListItemDto(version: ApplicationFormVersion): ApplicationFormVersionListItemDto =
+        ApplicationFormVersionListItemDto(
+            id = version.id ?: throw IllegalStateException("ApplicationFormVersion ID must not be null!"),
+            applicationFormId =
+                version.applicationForm.id
+                    ?: throw IllegalStateException("ApplicationForm ID must not be null!"),
+            versionNumber = version.versionNumber,
+            name = version.name,
+            status = version.status,
+            organizationId = version.organizationId,
+            createdBy = userMapper.toUserDto(version.createdBy),
+            createdAt =
+                version.createdAt
+                    ?: throw IllegalStateException("ApplicationFormVersion createdAt must not be null!"),
+        )
+}
+
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionRepository.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionRepository.kt
@@ -0,0 +1,19 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form_version
+
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.stereotype.Repository
+import java.util.Optional
+import java.util.UUID
+
+@Repository
+interface ApplicationFormVersionRepository : JpaRepository<ApplicationFormVersion, UUID> {
+    fun findByApplicationFormIdOrderByVersionNumberDesc(applicationFormId: UUID): List<ApplicationFormVersion>
+
+    fun findByApplicationFormIdAndVersionNumber(
+        applicationFormId: UUID,
+        versionNumber: Int,
+    ): Optional<ApplicationFormVersion>
+
+    fun countByApplicationFormId(applicationFormId: UUID): Int
+}
+
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionService.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionService.kt
@@ -0,0 +1,160 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form_version
+
+import com.betriebsratkanzlei.legalconsenthub.application_form.ApplicationForm
+import com.betriebsratkanzlei.legalconsenthub.application_form.ApplicationFormRepository
+import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormNotFoundException
+import com.betriebsratkanzlei.legalconsenthub.error.ApplicationFormVersionNotFoundException
+import com.betriebsratkanzlei.legalconsenthub.form_element.FormElement
+import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementSection
+import com.betriebsratkanzlei.legalconsenthub.form_element.FormOption
+import com.betriebsratkanzlei.legalconsenthub.user.User
+import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormSnapshotDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.FormElementSnapshotDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.FormElementSectionSnapshotDto
+import com.betriebsratkanzlei.legalconsenthub_api.model.FormOptionDto
+import com.fasterxml.jackson.databind.ObjectMapper
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class ApplicationFormVersionService(
+    private val versionRepository: ApplicationFormVersionRepository,
+    private val applicationFormRepository: ApplicationFormRepository,
+    private val objectMapper: ObjectMapper,
+) {
+    @Transactional
+    fun createVersion(
+        applicationForm: ApplicationForm,
+        user: User,
+    ): ApplicationFormVersion {
+        val nextVersionNumber = versionRepository.countByApplicationFormId(applicationForm.id!!) + 1
+
+        val snapshot = createSnapshot(applicationForm)
+        val snapshotJson = objectMapper.writeValueAsString(snapshot)
+
+        val version =
+            ApplicationFormVersion(
+                applicationForm = applicationForm,
+                versionNumber = nextVersionNumber,
+                name = applicationForm.name,
+                status = applicationForm.status,
+                organizationId = applicationForm.organizationId,
+                snapshotData = snapshotJson,
+                createdBy = user,
+            )
+
+        return versionRepository.save(version)
+    }
+
+    fun getVersionsByApplicationFormId(applicationFormId: UUID): List<ApplicationFormVersion> =
+        versionRepository.findByApplicationFormIdOrderByVersionNumberDesc(applicationFormId)
+
+    fun getVersion(
+        applicationFormId: UUID,
+        versionNumber: Int,
+    ): ApplicationFormVersion =
+        versionRepository
+            .findByApplicationFormIdAndVersionNumber(applicationFormId, versionNumber)
+            .orElseThrow { ApplicationFormVersionNotFoundException(applicationFormId, versionNumber) }
+
+    @Transactional
+    fun restoreVersion(
+        applicationFormId: UUID,
+        versionNumber: Int,
+        user: User,
+    ): ApplicationForm {
+        val version = getVersion(applicationFormId, versionNumber)
+        val applicationForm =
+            applicationFormRepository
+                .findById(applicationFormId)
+                .orElseThrow { ApplicationFormNotFoundException(applicationFormId) }
+
+        val snapshot = objectMapper.readValue(version.snapshotData, ApplicationFormSnapshotDto::class.java)
+
+        applicationForm.name = snapshot.name
+        applicationForm.status = snapshot.status
+        applicationForm.organizationId = snapshot.organizationId
+        applicationForm.lastModifiedBy = user
+
+        applicationForm.formElementSections.clear()
+        snapshot.sections.forEach { sectionSnapshot ->
+            val section = createSectionFromSnapshot(sectionSnapshot, applicationForm)
+            applicationForm.formElementSections.add(section)
+        }
+
+        val restoredForm = applicationFormRepository.save(applicationForm)
+
+        createVersion(restoredForm, user)
+
+        return restoredForm
+    }
+
+    private fun createSnapshot(applicationForm: ApplicationForm): ApplicationFormSnapshotDto =
+        ApplicationFormSnapshotDto(
+            name = applicationForm.name,
+            status = applicationForm.status,
+            organizationId = applicationForm.organizationId,
+            sections =
+                applicationForm.formElementSections.map { section ->
+                    FormElementSectionSnapshotDto(
+                        title = section.title,
+                        shortTitle = section.shortTitle,
+                        description = section.description,
+                        elements =
+                            section.formElements.map { element ->
+                                FormElementSnapshotDto(
+                                    title = element.title,
+                                    description = element.description,
+                                    type = element.type,
+                                    options =
+                                        element.options.map { option ->
+                                            FormOptionDto(
+                                                value = option.value,
+                                                label = option.label,
+                                                processingPurpose = option.processingPurpose,
+                                                employeeDataCategory = option.employeeDataCategory,
+                                            )
+                                        },
+                                )
+                            },
+                    )
+                },
+        )
+
+    private fun createSectionFromSnapshot(
+        sectionSnapshot: FormElementSectionSnapshotDto,
+        applicationForm: ApplicationForm,
+    ): FormElementSection {
+        val section =
+            FormElementSection(
+                title = sectionSnapshot.title,
+                shortTitle = sectionSnapshot.shortTitle,
+                description = sectionSnapshot.description,
+                applicationForm = applicationForm,
+            )
+
+        sectionSnapshot.elements.forEach { elementSnapshot ->
+            val element =
+                FormElement(
+                    title = elementSnapshot.title,
+                    description = elementSnapshot.description,
+                    type = elementSnapshot.type,
+                    formElementSection = section,
+                    options =
+                        elementSnapshot.options.map { optionDto ->
+                            FormOption(
+                                value = optionDto.value,
+                                label = optionDto.label,
+                                processingPurpose = optionDto.processingPurpose,
+                                employeeDataCategory = optionDto.employeeDataCategory,
+                            )
+                        }.toMutableList(),
+                )
+            section.formElements.add(element)
+        }
+
+        return section
+    }
+}
+
--- a/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ApplicationFormVersionNotFoundException.kt
+++ b/legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ApplicationFormVersionNotFoundException.kt
@@ -0,0 +1,9 @@
+package com.betriebsratkanzlei.legalconsenthub.error
+
+import java.util.UUID
+
+class ApplicationFormVersionNotFoundException(
+    applicationFormId: UUID,
+    versionNumber: Int,
+) : RuntimeException("Application form version $versionNumber for application form $applicationFormId not found")
+