feat(fullstack): Add notifications, user is now an entity, add testcontainers, rework custom permissions, get user from JWT in endpoints

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/ExceptionHandler.kt

@@ -16,7 +16,7 @@ class ExceptionHandler {
     var logger = LoggerFactory.getLogger(ExceptionHandler::class.java)
 
     @ResponseBody
-    @ExceptionHandler(ApplicationFormNotFoundException::class)
+    @ExceptionHandler(ApplicationFormNotFoundException::class, UserNotFoundException::class)
     @ResponseStatus(HttpStatus.NOT_FOUND)
     fun handleNotFoundError(e: Exception): ResponseEntity<ProblemDetails> {
         logger.warn(e.message, e)
@@ -47,6 +47,22 @@ class ExceptionHandler {
             )
     }
 
+    @ResponseBody
+    @ExceptionHandler(UserAlreadyExistsException::class)
+    @ResponseStatus(HttpStatus.CONFLICT)
+    fun handleUserAlreadyExistsError(e: UserAlreadyExistsException): ResponseEntity<ProblemDetails> {
+        logger.warn(e.message, e)
+        return ResponseEntity.status(HttpStatus.CONFLICT).contentType(MediaType.APPLICATION_PROBLEM_JSON)
+            .body(
+                ProblemDetails(
+                    title = "Conflict",
+                    status = HttpStatus.CONFLICT.value(),
+                    type = URI.create("about:blank"),
+                    detail = e.message ?: "Resource already exists"
+                )
+            )
+    }
+
     @ResponseBody
     @ExceptionHandler(
         ApplicationFormNotCreatedException::class,

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserAlreadyExistsException.kt

@@ -0,0 +1,3 @@
+package com.betriebsratkanzlei.legalconsenthub.error
+
+class UserAlreadyExistsException(id: String): RuntimeException("User with ID $id already exists") 

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/error/UserNotFoundException.kt

@@ -0,0 +1,3 @@
+package com.betriebsratkanzlei.legalconsenthub.error
+
+class UserNotFoundException(id: String): RuntimeException("Couldn't find user with ID: $id")