package logfile import ( "encoding/csv" "fmt" "os" "strconv" "time" "github.com/go-flucky/flucky/pkg/internal/format" "github.com/go-flucky/flucky/pkg/types" ) type csvLogfile struct { logfile string } func (cl *csvLogfile) Read() ([]*types.MeasuredValue, error) { if _, err := os.Stat(cl.logfile); os.IsNotExist(err) { return nil, fmt.Errorf("%v: %v", errorLogfileNotFound, cl.logfile) } f, err := os.Open(cl.logfile) if err != nil { return nil, fmt.Errorf("%v: %v", errorLogfileOpen, cl.logfile) } defer f.Close() r := csv.NewReader(f) records, err := r.ReadAll() if err != nil { return nil, fmt.Errorf("%v %v: %v", errorLogfileDecode, cl.logfile, err) } measuredValues := make([]*types.MeasuredValue, 0) for _, record := range records { // ValueType valueType, err := types.SelectMeasuredValueType(record[1]) if err != nil { return nil, fmt.Errorf("%v %v: %v", errorParseFloat, record[1], err) } // Value value, err := strconv.ParseFloat(record[2], 64) if err != nil { return nil, fmt.Errorf("%v %v: %v", errorParseFloat, record[2], err) } // Times times := make([]time.Time, 0) for _, i := range []int{3, 4} { time, err := time.Parse(format.TimeFormat, record[i]) if err != nil { return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[i], err) } times = append(times, time) } measuredValue := &types.MeasuredValue{ ID: record[0], ValueType: *valueType, Value: value, FromDate: times[0], TillDate: times[1], SensorID: record[5], } // Creation date creationDate, err := time.Parse(format.TimeFormat, record[6]) if err != nil { return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[6], err) } measuredValue.CreationDate = creationDate if record[7] != "null" { updateDate, err := time.Parse(format.TimeFormat, record[7]) if err != nil { return nil, fmt.Errorf("%v %v: %v", errorParseTime, record[7], err) } measuredValue.UpdateDate = &updateDate } measuredValues = append(measuredValues, measuredValue) } return measuredValues, nil } func (cl *csvLogfile) Write(measuredValues []*types.MeasuredValue) error { f, err := os.Create(cl.logfile) if err != nil { return fmt.Errorf("%v: %v", errorLogfileCreate, cl.logfile) } defer f.Close() writeCreationDate(measuredValues) w := csv.NewWriter(f) for _, measuredValue := range measuredValues { record := []string{ measuredValue.ID, fmt.Sprintf("%v", measuredValue.ValueType), fmt.Sprintf("%v", measuredValue.Value), measuredValue.FromDate.Format(format.TimeFormat), measuredValue.TillDate.Format(format.TimeFormat), measuredValue.SensorID, } record = append(record, measuredValue.CreationDate.Format(format.TimeFormat)) if measuredValue.UpdateDate != nil { record = append(record, measuredValue.UpdateDate.Format(format.TimeFormat)) } else { record = append(record, "null") } w.Write(record) } w.Flush() return nil }