continue on existing save (#3)

* long blob

* fix continue

* one slot only?

* fallback if there is no slot data yet

* Revert "one slot only?"

This reverts commit 20997e9cd8.

db/db.go

@@ -42,8 +42,8 @@ func Init(username, password, protocol, address, database string) error {
 	if err != nil {
 		panic(err)
 	}
-	tx.Exec("CREATE TABLE IF NOT EXISTS systemSaveData (uuid BINARY(16) PRIMARY KEY, data BLOB, timestamp TIMESTAMP)")
-	tx.Exec("CREATE TABLE IF NOT EXISTS sessionSaveData (uuid BINARY(16), slot TINYINT, data BLOB, timestamp TIMESTAMP, PRIMARY KEY (uuid, slot))")
+	tx.Exec("CREATE TABLE IF NOT EXISTS systemSaveData (uuid BINARY(16) PRIMARY KEY, data LONGBLOB, timestamp TIMESTAMP)")
+	tx.Exec("CREATE TABLE IF NOT EXISTS sessionSaveData (uuid BINARY(16), slot TINYINT, data LONGBLOB, timestamp TIMESTAMP, PRIMARY KEY (uuid, slot))")
 	err = tx.Commit()
 	if err != nil {
 		panic(err)

db/savedata.go

@@ -79,6 +79,16 @@ func ReadSessionSaveData(uuid []byte, slot int) (defs.SessionSaveData, error) {
 	return save, err
 }
 
+func GetLatestSessionSaveDataSlot(uuid []byte) (int, error) {
+	var slot int
+	err := handle.QueryRow("SELECT slot FROM sessionSaveData WHERE uuid = ? ORDER BY timestamp DESC, slot ASC LIMIT 1", uuid).Scan(&slot)
+	if err != nil {
+		return -1, err
+	}
+
+	return slot, nil
+}
+
 func StoreSessionSaveData(uuid []byte, data defs.SessionSaveData, slot int) error {
 
 	var buf bytes.Buffer