func writeValuesTofile(datatowrite *ProtobufTest.TestMessage) {
//Retreive client information from the protobuf message
ClientName := datatowrite.GetClientName()
ClientDescription := datatowrite.GetDescription()
ClientID := strconv.Itoa(int(datatowrite.GetClientId()))
// retrieve the message items list
items := datatowrite.GetMessageitems()
fmt.Println("Writing value to CSV file")
//Open file for writes, if the file does not exist then create it
file, err := os.OpenFile("CSVValues.csv", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
checkError(err)
//make sure the file gets closed once the function exists
defer file.Close()
//Go through the list of message items, insert them into a string array then write them to the CSV file.
writer := csv.NewWriter(file)
for _, item := range items {
record := []string{ClientID, ClientName, ClientDescription, strconv.Itoa(int(item.GetId())), item.GetItemName(), strconv.Itoa(int(item.GetItemValue())), strconv.Itoa(int(item.GetItemType()))}
writer.Write(record)
fmt.Println(record)
}
//flush data to the CSV file
writer.Flush()
fmt.Println("Finished Writing value to CSV file")
}
func retrieveDataFromFile(fname *string) ([]byte, error) {
file, err := os.Open(*fname)
checkError(err)
defer file.Close()
csvreader := csv.NewReader(file)
var hdrs Headers
hdrs, err = csvreader.Read()
checkError(err)
ITEMIDINDEX := hdrs.getHeaderIndex("itemid")
ITEMNAMEINDEX := hdrs.getHeaderIndex("itemname")
ITEMVALUEINDEX := hdrs.getHeaderIndex("itemvalue")
ITEMTYPEINDEX := hdrs.getHeaderIndex("itemType")
ProtoMessage := new(ProtobufTest.TestMessage)
ProtoMessage.ClientName = proto.String(CLIENT_NAME)
ProtoMessage.ClientId = proto.Int32(CLIENT_ID)
ProtoMessage.Description = proto.String(CLIENT_DESCRIPTION)
//loop through the records
for {
record, err := csvreader.Read()
if err != io.EOF {
checkError(err)
} else {
break
}
//Populate items
testMessageItem := new(ProtobufTest.TestMessage_MsgItem)
itemid, err := strconv.Atoi(record[ITEMIDINDEX])
checkError(err)
testMessageItem.Id = proto.Int32(int32(itemid))
testMessageItem.ItemName = &record[ITEMNAMEINDEX]
itemvalue, err := strconv.Atoi(record[ITEMVALUEINDEX])
checkError(err)
testMessageItem.ItemValue = proto.Int32(int32(itemvalue))
itemtype, err := strconv.Atoi(record[ITEMTYPEINDEX])
checkError(err)
iType := ProtobufTest.TestMessage_ItemType(itemtype)
testMessageItem.ItemType = &iType
ProtoMessage.Messageitems = append(ProtoMessage.Messageitems, testMessageItem)
fmt.Println(record)
}
//fmt.Println(ProtoMessage.Messageitems)
return proto.Marshal(ProtoMessage)
}