feat(#4): Add comparison for versions, refactor version restoring

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

@@ -1,5 +1,6 @@
 package com.betriebsratkanzlei.legalconsenthub.application_form
 
+import com.betriebsratkanzlei.legalconsenthub.application_form_version.ApplicationFormVersion
 import com.betriebsratkanzlei.legalconsenthub.form_element.FormElementSection
 import com.betriebsratkanzlei.legalconsenthub.user.User
 import com.betriebsratkanzlei.legalconsenthub_api.model.ApplicationFormStatus
@@ -30,6 +31,8 @@ class ApplicationForm(
     var name: String = "",
     @OneToMany(mappedBy = "applicationForm", cascade = [CascadeType.ALL], orphanRemoval = true)
     var formElementSections: MutableList<FormElementSection> = mutableListOf(),
+    @OneToMany(mappedBy = "applicationForm", cascade = [CascadeType.ALL], orphanRemoval = true)
+    var versions: MutableList<ApplicationFormVersion> = mutableListOf(),
     @Column(nullable = false)
     var isTemplate: Boolean,
     var organizationId: String = "",

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

@@ -56,6 +56,7 @@ class ApplicationFormService(
     }
 
     fun updateApplicationForm(applicationFormDto: ApplicationFormDto): ApplicationForm {
+        val existingApplicationForm = getApplicationFormById(applicationFormDto.id)
         val applicationForm = applicationFormMapper.toApplicationForm(applicationFormDto)
         val updatedApplicationForm: ApplicationForm
 
@@ -66,7 +67,9 @@ class ApplicationFormService(
         }
 
         val currentUser = userService.getCurrentUser()
-        versionService.createVersion(updatedApplicationForm, currentUser)
+        if (versionService.hasChanges(existingApplicationForm, updatedApplicationForm)) {
+            versionService.createVersion(updatedApplicationForm, currentUser)
+        }
 
         return updatedApplicationForm
     }

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/application_form_version/ApplicationFormVersionService.kt

@@ -47,6 +47,15 @@ class ApplicationFormVersionService(
         return versionRepository.save(version)
     }
 
+    fun hasChanges(
+        existingForm: ApplicationForm,
+        newForm: ApplicationForm,
+    ): Boolean {
+        val existingSnapshot = createSnapshot(existingForm)
+        val newSnapshot = createSnapshot(newForm)
+        return existingSnapshot != newSnapshot
+    }
+
     fun getVersionsByApplicationFormId(applicationFormId: UUID): List<ApplicationFormVersion> =
         versionRepository.findByApplicationFormIdOrderByVersionNumberDesc(applicationFormId)