Implement note creation + update tests

api/src/services/NotesService.kt

@@ -8,6 +8,7 @@ import me.liuwj.ktorm.dsl.*
 import org.kodein.di.Kodein
 import org.kodein.di.KodeinAware
 import org.kodein.di.generic.instance
+import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
 
 /**
@@ -47,7 +48,20 @@ class NotesService(override val kodein: Kodein) : KodeinAware {
         .firstOrNull()
 
     fun createNote(userId: Int, title: String, tags: List<String>) {
-        TODO()
+        db.useTransaction {
+            val noteId = db.insertAndGenerateKey(Notes) {
+                it.title to title
+                it.userId to userId
+                it.updatedAt to LocalDateTime.now()
+            }
+
+            tags.forEach { tagName ->
+                db.insert(Tags) {
+                    it.name to tagName
+                    it.noteId to noteId
+                }
+            }
+        }
     }
 
     fun getTagsAndChapters(noteId: Int): TagsChaptersDTO {
@@ -72,6 +86,7 @@ class NotesService(override val kodein: Kodein) : KodeinAware {
             if (title != null) {
                 db.update(Notes) {
                     it.title to title
+                    it.updatedAt to LocalDateTime.now()
                     where { it.id eq noteId }
                 }
             }