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// Copyright 2019 Gytis Repečka (gytis@repecka.com). All rights reserved.
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// Use of this source code is governed by a GNU GPL license that can be
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// found in the LICENSE file.
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package main |
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import ( |
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"fmt" |
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"time" |
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"os" |
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"encoding/csv" |
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"io" |
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// "log"
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// "bufio"
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// "strings"
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"strconv" |
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"errors" |
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) |
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// Todo: push loaded data to this struct
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type carDiagData struct { |
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dataTimestamp string |
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engineRpm float64 |
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fuelFlow float64 |
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intakeAirTemp uint |
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speedObd uint |
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massAirFlow float64 |
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throttlePos float64 |
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voltageObd float64 |
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engineCoolTemp uint |
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} |
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// Format date
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func ConvertStrToDate (inStr string) (string, error) { |
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// Timestamp layout of data in CSV file
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timestampLayoutFile := "Mon Jan 02 15:04:05 MST 2006" |
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// Timestamp layout to output
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timestampLayoutOut := "2006-01-02 15:04:05" |
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var timestampOut string |
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timestamp, err := time.Parse(timestampLayoutFile, inStr) |
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if err != nil { |
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return "", errors.New("Can't convert string to date!") |
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} else { |
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timestampOut = timestamp.Format(timestampLayoutOut) |
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return timestampOut, nil |
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} |
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} |
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// String to float
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func ConvertStrToFloat (inStr string) (float64, error) { |
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flt, err := strconv.ParseFloat(inStr, 64) |
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if err != nil { |
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return 0, errors.New("Can't convert string to float!") |
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} else { |
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return flt, nil |
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} |
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} |
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// Convert string to integer
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func ConvertStrToInt(inStr string) (int, error) { |
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intg, err := strconv.Atoi(inStr) |
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if err != nil { |
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return 0, errors.New("Can't convert string to int!") |
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} else { |
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return intg, nil |
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} |
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} |
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func main() { |
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currentTime := time.Now() |
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inputFileName := "trackLog-sample.csv" |
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fmt.Printf("File to process: %s\n", inputFileName) |
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fmt.Printf("Started: %s.\n", currentTime.Format("2006-01-02 15:04:05.000 (MST Z07:00)")) |
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fmt.Println("--------------------") |
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csvFile, err := os.Open(inputFileName) |
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// Close file in the end of main
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defer csvFile.Close() |
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if err != nil { |
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fmt.Printf("There was an error opening file: %s.\n", err) |
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return |
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} |
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// Read CSV file
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fileReader := csv.NewReader(csvFile) |
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// Reader options
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// - Field delimiter
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fileReader.Comma = ',' |
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// - Each record field count must match header (0) record field count
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fileReader.FieldsPerRecord = 0 |
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// / Reader options
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recordCount := 0 |
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for { |
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// Read one line at one iteration
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record, err := fileReader.Read() |
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// If end of file, stop reading file
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if err == io.EOF { |
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break |
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} |
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// If error in record, stop reading file
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if err != nil { |
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// log.Fatal(err)
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fmt.Printf("Error in record: %s.\n", err) |
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break |
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} |
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// Perform actions with record
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// Record is an array of fields
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// If it is first record, treat it as header
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if recordCount == 0 { |
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fmt.Printf("Fields: %d\n\n", len(record)) |
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fmt.Printf("\n---------------------------\n") |
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// Iterate through record elements (fields)
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fmt.Printf("|") |
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// for i := 0; i < len(record); i++ {
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// For experimenting only output 4 fiels
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for i := 0; i < 4; i++ { |
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fmt.Printf(" %s |", record[i]) |
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} |
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fmt.Printf("\n---------------------------\n") |
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} else { |
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// Process data record (not header)
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field0, err := ConvertStrToDate(record[0]) |
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if err != nil { |
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// Instead of returned error output question mark
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fmt.Printf("(?)") |
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} else { |
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fmt.Printf("(%s) ", field0) |
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} |
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field1, err := ConvertStrToFloat(record[1]) |
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if err != nil { |
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fmt.Printf("?.?? | ") |
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} else { |
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fmt.Printf("%.2f | ", field1) |
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} |
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field2, err := ConvertStrToFloat(record[2]) |
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if err != nil { |
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fmt.Printf("?.?? | ") |
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} else { |
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fmt.Printf("%.2f | ", field2) |
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} |
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// Convert string (inputString) to integer (inputInt)
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field3, err := ConvertStrToInt(record[3]) |
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if err != nil { |
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// fmt.Printf("%s", err)
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// Instead of ConvertStrToInt returned error output question mark
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fmt.Printf("? |") |
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} else { |
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fmt.Printf("%d |", field3) |
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} |
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fmt.Printf("\n") |
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// fmt.Println(record)
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} |
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// / Perform actions with record
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// Increase counter
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recordCount++ |
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} |
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fmt.Println("--------------------") |
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fmt.Printf("Total records processed: %d.\n", recordCount) |
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} |
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Can't render this file because it has a wrong number of fields in line 22.
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