feat(fullstack): Add title and description to form element, add HTML and PDF endpoints for application form

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormController.kt

@@ -4,6 +4,10 @@ import com.betriebsratkanzlei.legalconsenthub_api.api.ApplicationFormApi
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.CreateApplicationFormDto
 import com.betriebsratkanzlei.legalconsenthub_api.model.PagedApplicationFormDto
+import org.springframework.core.io.ByteArrayResource
+import org.springframework.core.io.Resource
+import org.springframework.http.HttpHeaders
+import org.springframework.http.MediaType
 import org.springframework.http.ResponseEntity
 import org.springframework.web.bind.annotation.RestController
 import java.util.UUID
@@ -13,6 +17,7 @@ class ApplicationFormController(
     val applicationFormService: ApplicationFormService,
     val pagedApplicationFormMapper: PagedApplicationFormMapper,
     val applicationFormMapper: ApplicationFormMapper,
+    val applicationFormFormatService: ApplicationFormFormatService
 ) : ApplicationFormApi {
 
     override fun createApplicationForm(createApplicationFormDto: CreateApplicationFormDto): ResponseEntity<ApplicationFormDto> {
@@ -40,6 +45,23 @@ class ApplicationFormController(
         )
     }
 
+    override fun getApplicationFormHtml(id: UUID): ResponseEntity<String> {
+        val applicationForm = applicationFormService.getApplicationFormById(id)
+        return ResponseEntity.ok(
+            applicationFormFormatService.generateHtml(applicationForm)
+        )
+    }
+
+    override fun getApplicationFormPdf(id: UUID): ResponseEntity<Resource> {
+        val applicationForm = applicationFormService.getApplicationFormById(id)
+        val pdfBytes = applicationFormFormatService.generatePdf(applicationForm)
+        val resource = ByteArrayResource(pdfBytes)
+        return ResponseEntity.ok()
+            .header(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=\"form-$id.pdf\"")
+            .contentType(MediaType.APPLICATION_PDF)
+            .body(resource)
+    }
+
     override fun updateApplicationForm(
         id: UUID,
         applicationFormDto: ApplicationFormDto

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form/ApplicationFormFormatService.kt

@@ -0,0 +1,31 @@
+package com.betriebsratkanzlei.legalconsenthub.application_form
+
+import org.springframework.stereotype.Service
+import org.thymeleaf.TemplateEngine
+import org.thymeleaf.context.Context
+import java.io.ByteArrayOutputStream
+import com.openhtmltopdf.pdfboxout.PdfRendererBuilder
+
+@Service
+class ApplicationFormFormatService(
+    private val templateEngine: TemplateEngine
+) {
+    fun generatePdf(applicationForm: ApplicationForm): ByteArray {
+        val htmlContent = generateHtml(applicationForm)
+
+        val outputStream = ByteArrayOutputStream()
+        PdfRendererBuilder().useFastMode()
+            .withHtmlContent(htmlContent, null)
+            .toStream(outputStream)
+            .run()
+
+        return outputStream.toByteArray()
+    }
+
+    fun generateHtml(applicationForm: ApplicationForm): String {
+        val context = Context().apply {
+            setVariable("applicationForm", applicationForm)
+        }
+        return templateEngine.process("application_form_template", context)
+    }
+}

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/form_element/FormElement.kt

@@ -17,7 +17,7 @@ import jakarta.persistence.OneToMany
 import java.util.UUID;
 
 @Entity
-class FormElement (
+class FormElement(
     @Id
     @GeneratedValue
     var id: UUID? = null,
@@ -26,6 +26,10 @@ class FormElement (
     @JoinColumn(name = "application_form_id", nullable = false)
     var applicationForm: ApplicationForm? = null,
 
+    var title: String? = null,
+
+    var description: String? = null,
+
     @ElementCollection
     @CollectionTable(name = "form_element_options", joinColumns = [JoinColumn(name = "form_element_id")])
     var options: MutableList<FormOption> = mutableListOf(),

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/form_element/FormElementMapper.kt

@@ -15,6 +15,8 @@ class FormElementMapper(
     fun toFormElementDto(formElement: FormElement): FormElementDto {
         return FormElementDto(
             id = formElement.id ?: throw IllegalStateException("ApplicationForm ID must not be null!"),
+            title = formElement.title,
+            description = formElement.description,
             options = formElement.options.map { formOptionMapper.toFormOptionDto(it) },
             type = formElement.type,
             applicationFormId = formElement.applicationForm?.id
@@ -28,6 +30,8 @@ class FormElementMapper(
 
         return FormElement(
             id = formElement.id,
+            title = formElement.title,
+            description = formElement.description,
             options = formElement.options.map { formOptionMapper.toFormOption(it) }.toMutableList(),
             type = formElement.type,
             applicationForm = applicationForm
@@ -37,6 +41,8 @@ class FormElementMapper(
     fun toFormElement(formElement: CreateFormElementDto, applicationForm: ApplicationForm): FormElement {
         return FormElement(
             id = null,
+            title = formElement.title,
+            description = formElement.description,
             options = formElement.options.map { formOptionMapper.toFormOption(it) }.toMutableList(),
             type = formElement.type,
             applicationForm = applicationForm