Improve Transaction model

app/src/main/java/net/pokeranalytics/android/model/realm/Transaction.kt

@@ -4,6 +4,7 @@ import io.realm.Realm
 import io.realm.RealmObject
 import io.realm.annotations.Ignore
 import io.realm.annotations.PrimaryKey
+import io.realm.kotlin.where
 import net.pokeranalytics.android.R
 import net.pokeranalytics.android.model.filter.Filterable
 import net.pokeranalytics.android.model.filter.QueryCondition
@@ -75,10 +76,6 @@ open class Transaction : RealmObject(), Manageable, StaticRowRepresentableDataSo
 		return bankroll != null && type != null && amount != 0.0
 	}
 
-	override fun alreadyExists(realm: Realm): Boolean {
-		TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
-	}
-
 	override fun getFailedSaveMessage(status: SaveValidityStatus): Int {
 		return if (bankroll == null) {
 			R.string.no_br_popup_message
@@ -89,6 +86,10 @@ open class Transaction : RealmObject(), Manageable, StaticRowRepresentableDataSo
 		}
 	}
 
+	override fun alreadyExists(realm: Realm): Boolean {
+		return realm.where<Transaction>().equalTo("id", id).findFirst()!= null
+	}
+
 	override fun isValidForDelete(realm: Realm): Boolean {
 		TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
 	}
@@ -97,4 +98,10 @@ open class Transaction : RealmObject(), Manageable, StaticRowRepresentableDataSo
 		TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
 	}
 
+	override fun getSaveValidityStatus(realm: Realm): SaveValidityStatus {
+		if (bankroll == null || type == null || amount == 0.0) {
+			return SaveValidityStatus.DATA_INVALID
+		}
+		return SaveValidityStatus.VALID
+	}
 }