fix(sync): notify all co-users on inventory mutations (PATCH/DELETE/PUT)

server/src/main/kotlin/de/bollwerk/server/repository/InventoryRepository.kt

@@ -93,6 +93,15 @@ internal class InventoryRepository {
         Inventories.deleteWhere { Inventories.id eq inventoryId }
     }
 
+    /**
+     * Returns all userIds that are assigned to the given inventory.
+     */
+    fun getUsersForInventory(inventoryId: String): List<String> = transaction {
+        Users.selectAll()
+            .where { Users.inventoryId eq inventoryId }
+            .map { it[Users.id] }
+    }
+
     /**
      * Returns all inventories visible to the given user, marking the user's active one.
      */

server/src/main/kotlin/de/bollwerk/server/routes/InventoryRoutes.kt

@@ -112,6 +112,9 @@ internal fun Route.inventoryRoutes(
             repository.saveInventory(inventoryId, inventory)
             val saved = repository.loadInventory(inventoryId)
             wsManager.notifyFullSyncRequired(userId)
+            repository.getUsersForInventory(inventoryId)
+                .filter { it != userId }
+                .forEach { wsManager.notifyFullSyncRequired(it) }
             call.respond(HttpStatusCode.OK, saved)
         }
 
@@ -136,6 +139,9 @@ internal fun Route.inventoryRoutes(
             } else {
                 val item = repository.loadItem(inventoryId, itemId)!!
                 wsManager.notifyInventoryUpdated(userId, itemId)
+                repository.getUsersForInventory(inventoryId)
+                    .filter { it != userId }
+                    .forEach { wsManager.notifyInventoryUpdated(it, itemId) }
                 call.respond(HttpStatusCode.OK, item)
             }
         }
@@ -152,6 +158,9 @@ internal fun Route.inventoryRoutes(
                 call.respond(HttpStatusCode.NotFound, ErrorResponse(status = 404, message = "Item not found"))
             } else {
                 wsManager.notifyInventoryUpdated(userId, itemId)
+                repository.getUsersForInventory(inventoryId)
+                    .filter { it != userId }
+                    .forEach { wsManager.notifyInventoryUpdated(it, itemId) }
                 call.respond(HttpStatusCode.NoContent)
             }
         }