handle no db yet in message retrieve

client/messagestorage.go

@@ -90,6 +90,10 @@ func StoreMessage(peer *Peer, usermessage *meowlib.UserMessage, filenames []stri
 // Get new messages from a peer
 func GetNewMessages(peer *Peer, lastDbId int, password string) ([]*InternalUserMessage, error) {
 	var messages []*InternalUserMessage
+	// handle no db yet
+	if len(peer.DbIds) == 0 {
+		return messages, nil
+	}
 	fileidx := len(peer.DbIds) - 1
 	// There fileidx should provide the db that we need (unless wantMore overlaps the next DB)
 	db, _ := sql.Open("sqlite3", filepath.Join(GetConfig().StoragePath, peer.DbIds[fileidx]+GetConfig().DbSuffix)) // Open the created SQLite File
@@ -139,6 +143,10 @@ func GetNewMessages(peer *Peer, lastDbId int, password string) ([]*InternalUserM
 // Get old messages from a peer
 func GetMessagesHistory(peer *Peer, inAppMsgCount int, lastDbId int, wantMore int, password string) ([]InternalUserMessage, error) {
 	var messages []InternalUserMessage
+	// handle no db yet
+	if len(peer.DbIds) == 0 {
+		return messages, nil
+	}
 	fileidx := len(peer.DbIds) - 1
 	// initialize count with last db message count
 	countStack, err := getMessageCount(peer.DbIds[fileidx])

client/messagestorage_test.go

@@ -42,6 +42,12 @@ func TestStoreMessage(t *testing.T) {
 
 func TestManyStoreMessage(t *testing.T) {
 	id := createId()
+	// test with zero messages
+	messages, err := GetMessagesHistory(id.Peers[0], 0, 0, 10, GetConfig().memoryPassword)
+	if err != nil {
+		log.Fatal(err)
+	}
+	assert.Equal(t, len(messages), 0, "not 0 message")
 	for i := 1; i < 100; i++ {
 		var um meowlib.UserMessage
 		um.Data = []byte(randomLenString(20, 200))
@@ -50,7 +56,7 @@ func TestManyStoreMessage(t *testing.T) {
 			log.Fatal(err)
 		}
 	}
-	messages, err := GetMessagesHistory(id.Peers[0], 0, 0, 10, GetConfig().memoryPassword)
+	messages, err = GetMessagesHistory(id.Peers[0], 0, 0, 10, GetConfig().memoryPassword)
 	if err != nil {
 		log.Fatal(err)
 	}