Add day increment feature

doc/whats_new.md

@@ -2,7 +2,12 @@
 
 ## v0.1.2
 
-* Correctly process of optional WWFF keyword(issue #38)
+* DATE keyword is now optional
+* Date can have several delimiter ("-", "/", ".", or " ")
+* Partial dates can be entered ("20-9-6" => "2020-09-06")
+* The new (FLE v3) "DAY" keyword is now supported (increment is 10 max)
+* Date, band, and mode can be specified on a same line, even with a QSO
+* Correctly process of optional WWFF keyword
 * Correct some typos
 
 ## Previous releases

fleprocess/adif_write.go

@@ -76,7 +76,7 @@ func buildAdif(fullLog []LogLine, isWWFF bool, isSOTA bool) (adifList []string)
 			}
 		}
 		if logLine.Operator != "" {
-		adifLine.WriteString(adifElement("OPERATOR", logLine.Operator))
+			adifLine.WriteString(adifElement("OPERATOR", logLine.Operator))
 		}
 		if logLine.MyGrid != "" {
 			adifLine.WriteString(adifElement("MY_GRIDSQUARE", logLine.MyGrid))

fleprocess/adif_write_test.go

@@ -80,7 +80,6 @@ func Test_buildAdif(t *testing.T) {
 		"<STATION_CALLSIGN:8>ON4KJM/P <CALL:5>ON4LY <QSO_DATE:8>20200524 <TIME_ON:4>1312 <BAND:3>20m <MODE:2>CW <RST_SENT:3>559 <RST_RCVD:3>599 <MY_SIG:4>WWFF <MY_SIG_INFO:9>ONFF-0259 <OPERATOR:6>ON4KJM <MY_GRIDSQUARE:6>JO40eu <EOR>",
 	}
 
-
 	type args struct {
 		fullLog []LogLine
 		isWWFF  bool

fleprocess/load_file.go

@@ -61,8 +61,6 @@ func LoadFile(inputFilename string, isInterpolateTime bool) (filleFullLog []LogL
 	regexpHeaderMyGrid := regexp.MustCompile("(?i)^mygrid ")
 	regexpHeaderQslMsg := regexp.MustCompile("(?i)^qslmsg ")
 	regexpHeaderNickname := regexp.MustCompile("(?i)^nickname ")
-	regexpHeaderDateMarker := regexp.MustCompile("(?i)^date ")
-	regexpDatePattern := regexp.MustCompile("^(\\d{2}|\\d{4})[-/ .]\\d{1,2}[-/ .]\\d{1,2}$")
 
 	headerMyCall := ""
 	headerOperator := ""
@@ -71,7 +69,7 @@ func LoadFile(inputFilename string, isInterpolateTime bool) (filleFullLog []LogL
 	headerMyGrid := ""
 	headerQslMsg := ""
 	headerNickname := ""
-	headerDate := ""
+	//headerDate := ""
 	lineCount := 0
 
 	wrkTimeBlock := InferTimeBlock{}
@@ -218,42 +216,42 @@ func LoadFile(inputFilename string, isInterpolateTime bool) (filleFullLog []LogL
 			continue
 		}
 
-		// Date with keyword
+		// // Date with keyword
-		if regexpHeaderDateMarker.MatchString(eachline) {
+		// if regexpHeaderDateMarker.MatchString(eachline) {
-			errorMsg := ""
+		// 	errorMsg := ""
-			myDateList := regexpHeaderDateMarker.Split(eachline, -1)
+		// 	myDateList := regexpHeaderDateMarker.Split(eachline, -1)
-			if len(myDateList[1]) > 0 {
+		// 	if len(myDateList[1]) > 0 {
-				normalizedDate := ""
+		// 		normalizedDate := ""
-				normalizedDate, errorMsg = NormalizeDate(myDateList[1])
+		// 		normalizedDate, errorMsg = NormalizeDate(myDateList[1])
-				if len(errorMsg) != 0 {
+		// 		if len(errorMsg) != 0 {
-					errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
+		// 			errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
-				} else {
+		// 		} else {
-					headerDate, errorMsg = ValidateDate(normalizedDate)
+		// 			headerDate, errorMsg = ValidateDate(normalizedDate)
-					if len(errorMsg) != 0 {
+		// 			if len(errorMsg) != 0 {
-						errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, myDateList[1], errorMsg))
+		// 				errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, myDateList[1], errorMsg))
-					}
+		// 			}
-				}
+		// 		}
-			}
+		// 	}
-			//If there is no data after the marker, we just skip the data.
+		// 	//If there is no data after the marker, we just skip the data.
-			continue
+		// 	continue
-		}
+		// }
-
+
-		//Date, apparently alone on a line?
+		// //Date, apparently alone on a line?
-		if regexpDatePattern.MatchString(eachline) {
+		// if regexpDatePattern.MatchString(eachline) {
-			//We probably have a date, let's normalize it
+		// 	//We probably have a date, let's normalize it
-			errorMsg := ""
+		// 	errorMsg := ""
-			normalizedDate := ""
+		// 	normalizedDate := ""
-			normalizedDate, errorMsg = NormalizeDate(eachline)
+		// 	normalizedDate, errorMsg = NormalizeDate(eachline)
-			if len(errorMsg) != 0 {
+		// 	if len(errorMsg) != 0 {
-				errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
+		// 		errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
-			} else {
+		// 	} else {
-				headerDate, errorMsg = ValidateDate(normalizedDate)
+		// 		headerDate, errorMsg = ValidateDate(normalizedDate)
-				if len(errorMsg) != 0 {
+		// 		if len(errorMsg) != 0 {
-					errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
+		// 			errorLog = append(errorLog, fmt.Sprintf("Invalid Date at line %d: %s (%s)", lineCount, eachline, errorMsg))
-				}
+		// 		}
-			}
+		// 	}
-			continue
+		// 	continue
-		}
+		// }
 
 		// ****
 		// ** Process the data block
@@ -267,7 +265,7 @@ func LoadFile(inputFilename string, isInterpolateTime bool) (filleFullLog []LogL
 		previousLogLine.MyGrid = headerMyGrid
 		previousLogLine.QSLmsg = headerQslMsg //previousLogLine.QslMsg is redundant
 		previousLogLine.Nickname = headerNickname
-		previousLogLine.Date = headerDate
+		//previousLogLine.Date = headerDate
 
 		//parse a line
 		logline, errorLine := ParseLine(eachline, previousLogLine)

fleprocess/load_file_test.go

@@ -199,6 +199,188 @@ func TestLoadFile_happyCase_date(t *testing.T) {
 	os.Remove(temporaryDataFileName)
 }
 
+func TestLoadFile_happyCase_date2(t *testing.T) {
+
+	//Given
+	dataArray := make([]string, 0)
+	dataArray = append(dataArray, "# Header")
+	dataArray = append(dataArray, "myCall on4kjm/p")
+	dataArray = append(dataArray, "operator on4kjm")
+	dataArray = append(dataArray, "nickname Portable")
+	dataArray = append(dataArray, " ")
+	dataArray = append(dataArray, " #Log")
+	dataArray = append(dataArray, "20/5/23")
+	dataArray = append(dataArray, "40m cw 0950 ik5zve/5 9 5")
+	dataArray = append(dataArray, "on6zq")
+	dataArray = append(dataArray, "0954 on4do")
+	dataArray = append(dataArray, "20-05-25 20m ssb 1000 on4up")
+
+	temporaryDataFileName := createTestFile(dataArray)
+
+	//When
+	loadedLogFile, isLoadedOK := LoadFile(temporaryDataFileName, true)
+
+	//Then
+	if !isLoadedOK {
+		t.Error("Test file could not be correctly processed")
+	}
+	if len(loadedLogFile) == 0 {
+		t.Error("No data loaded")
+	}
+
+	expectedValue := "ON4KJM/P"
+	if loadedLogFile[0].MyCall != expectedValue {
+		t.Errorf("Not the expected MyCall value: %s (expecting %s)", loadedLogFile[0].MyCall, expectedValue)
+	}
+	expectedValue = "ON4KJM"
+	if loadedLogFile[0].Operator != expectedValue {
+		t.Errorf("Not the expected Operator value: %s (expecting %s)", loadedLogFile[0].Operator, expectedValue)
+	}
+	expectedValue = "Portable"
+	if loadedLogFile[0].Nickname != expectedValue {
+		t.Errorf("Not the expected eQsl Nickname value: %s (expecting %s)", loadedLogFile[0].Nickname, expectedValue)
+	}
+	expectedValue = "IK5ZVE/5"
+	if loadedLogFile[0].Call != expectedValue {
+		t.Errorf("Not the expected Call[0] value: %s (expecting %s)", loadedLogFile[0].Call, expectedValue)
+	}
+	expectedValue = "0950"
+	if loadedLogFile[0].Time != expectedValue {
+		t.Errorf("Not the expected Time[0] value: %s (expecting %s)", loadedLogFile[0].Time, expectedValue)
+	}
+	expectedValue = "2020-05-23"
+	if loadedLogFile[0].Date != expectedValue {
+		t.Errorf("Not the expected Date[0] value: %s (expecting %s)", loadedLogFile[0].Date, expectedValue)
+	}
+	expectedValue = "ON6ZQ"
+	if loadedLogFile[1].Call != expectedValue {
+		t.Errorf("Not the expected Call[1] value: %s (expecting %s)", loadedLogFile[1].Call, expectedValue)
+	}
+	expectedValue = "0952"
+	if loadedLogFile[1].Time != expectedValue {
+		t.Errorf("Not the expected Time[1] value: %s (expecting %s)", loadedLogFile[1].Time, expectedValue)
+	}
+	expectedValue = "ON4DO"
+	if loadedLogFile[2].Call != expectedValue {
+		t.Errorf("Not the expected Call[2] value: %s (expecting %s)", loadedLogFile[2].Call, expectedValue)
+	}
+	expectedValue = "0954"
+	if loadedLogFile[2].Time != expectedValue {
+		t.Errorf("Not the expected Time[2] value: %s (expecting %s)", loadedLogFile[2].Time, expectedValue)
+	}
+
+	//	 "20-05-25 20m 1000 on4up")
+	expectedValue = "2020-05-25"
+	if loadedLogFile[3].Date != expectedValue {
+		t.Errorf("Not the expected Date[3] value: %s (expecting %s)", loadedLogFile[3].Time, expectedValue)
+	}
+	expectedValue = "1000"
+	if loadedLogFile[3].Time != expectedValue {
+		t.Errorf("Not the expected Time[3] value: %s (expecting %s)", loadedLogFile[3].Time, expectedValue)
+	}
+	expectedValue = "20m"
+	if loadedLogFile[3].Band != expectedValue {
+		t.Errorf("Not the expected Band[3] value: %s (expecting %s)", loadedLogFile[3].Band, expectedValue)
+	}
+	expectedValue = "ON4UP"
+	if loadedLogFile[3].Call != expectedValue {
+		t.Errorf("Not the expected Call[3] value: %s (expecting %s)", loadedLogFile[3].Call, expectedValue)
+	}
+	//Clean Up
+	os.Remove(temporaryDataFileName)
+}
+
+func TestLoadFile_happyCase_day(t *testing.T) {
+
+	//Given
+	dataArray := make([]string, 0)
+	dataArray = append(dataArray, "# Header")
+	dataArray = append(dataArray, "myCall on4kjm/p")
+	dataArray = append(dataArray, "operator on4kjm")
+	dataArray = append(dataArray, "nickname Portable")
+	dataArray = append(dataArray, " ")
+	dataArray = append(dataArray, " #Log")
+	dataArray = append(dataArray, "20/5/23")
+	dataArray = append(dataArray, "40m cw 0950 ik5zve/5 9 5")
+	dataArray = append(dataArray, "on6zq")
+	dataArray = append(dataArray, "0954 on4do")
+	dataArray = append(dataArray, "day ++ 20m 1000 on4up")
+
+	temporaryDataFileName := createTestFile(dataArray)
+
+	//When
+	loadedLogFile, isLoadedOK := LoadFile(temporaryDataFileName, true)
+
+	//Then
+	if !isLoadedOK {
+		t.Error("Test file could not be correctly processed")
+	}
+	if len(loadedLogFile) == 0 {
+		t.Error("No data loaded")
+	}
+
+	expectedValue := "ON4KJM/P"
+	if loadedLogFile[0].MyCall != expectedValue {
+		t.Errorf("Not the expected MyCall value: %s (expecting %s)", loadedLogFile[0].MyCall, expectedValue)
+	}
+	expectedValue = "ON4KJM"
+	if loadedLogFile[0].Operator != expectedValue {
+		t.Errorf("Not the expected Operator value: %s (expecting %s)", loadedLogFile[0].Operator, expectedValue)
+	}
+	expectedValue = "Portable"
+	if loadedLogFile[0].Nickname != expectedValue {
+		t.Errorf("Not the expected eQsl Nickname value: %s (expecting %s)", loadedLogFile[0].Nickname, expectedValue)
+	}
+	expectedValue = "IK5ZVE/5"
+	if loadedLogFile[0].Call != expectedValue {
+		t.Errorf("Not the expected Call[0] value: %s (expecting %s)", loadedLogFile[0].Call, expectedValue)
+	}
+	expectedValue = "0950"
+	if loadedLogFile[0].Time != expectedValue {
+		t.Errorf("Not the expected Time[0] value: %s (expecting %s)", loadedLogFile[0].Time, expectedValue)
+	}
+	expectedValue = "2020-05-23"
+	if loadedLogFile[0].Date != expectedValue {
+		t.Errorf("Not the expected Date[0] value: %s (expecting %s)", loadedLogFile[0].Date, expectedValue)
+	}
+	expectedValue = "ON6ZQ"
+	if loadedLogFile[1].Call != expectedValue {
+		t.Errorf("Not the expected Call[1] value: %s (expecting %s)", loadedLogFile[1].Call, expectedValue)
+	}
+	expectedValue = "0952"
+	if loadedLogFile[1].Time != expectedValue {
+		t.Errorf("Not the expected Time[1] value: %s (expecting %s)", loadedLogFile[1].Time, expectedValue)
+	}
+	expectedValue = "ON4DO"
+	if loadedLogFile[2].Call != expectedValue {
+		t.Errorf("Not the expected Call[2] value: %s (expecting %s)", loadedLogFile[2].Call, expectedValue)
+	}
+	expectedValue = "0954"
+	if loadedLogFile[2].Time != expectedValue {
+		t.Errorf("Not the expected Time[2] value: %s (expecting %s)", loadedLogFile[2].Time, expectedValue)
+	}
+
+	//	 "20-05-25 20m 1000 on4up")
+	expectedValue = "2020-05-25"
+	if loadedLogFile[3].Date != expectedValue {
+		t.Errorf("Not the expected Date[3] value: %s (expecting %s)", loadedLogFile[3].Time, expectedValue)
+	}
+	expectedValue = "1000"
+	if loadedLogFile[3].Time != expectedValue {
+		t.Errorf("Not the expected Time[3] value: %s (expecting %s)", loadedLogFile[3].Time, expectedValue)
+	}
+	expectedValue = "20m"
+	if loadedLogFile[3].Band != expectedValue {
+		t.Errorf("Not the expected Band[3] value: %s (expecting %s)", loadedLogFile[3].Band, expectedValue)
+	}
+	expectedValue = "ON4UP"
+	if loadedLogFile[3].Call != expectedValue {
+		t.Errorf("Not the expected Call[3] value: %s (expecting %s)", loadedLogFile[3].Call, expectedValue)
+	}
+	//Clean Up
+	os.Remove(temporaryDataFileName)
+}
+
 func TestLoadFile_bad_date(t *testing.T) {
 
 	//Given
@@ -280,7 +462,6 @@ func TestLoadFile_bad_date(t *testing.T) {
 	os.Remove(temporaryDataFileName)
 }
 
-
 func TestLoadFile_wrongHeader(t *testing.T) {
 
 	//Given

fleprocess/parse_line.go

@@ -59,8 +59,12 @@ var regexpIsOMname = regexp.MustCompile("^@")
 var regexpIsGridLoc = regexp.MustCompile("^#")
 var regexpIsRst = regexp.MustCompile("^[\\d]{1,3}$")
 var regexpIsFreq = regexp.MustCompile("^[\\d]+\\.[\\d]+$")
-var regexpIsSotaKeyWord = regexp.MustCompile("(?i)^sota")
+var regexpIsSotaKeyWord = regexp.MustCompile("(?i)^sota$")
-var regexpIsWwffKeyWord = regexp.MustCompile("(?i)^wwff")
+var regexpIsWwffKeyWord = regexp.MustCompile("(?i)^wwff$")
+var regexpDatePattern = regexp.MustCompile("^(\\d{2}|\\d{4})[-/ .]\\d{1,2}[-/ .]\\d{1,2}$")
+var regexpIsDateKeyWord = regexp.MustCompile("(?i)^date$")
+var regexpDayIncrementPattern = regexp.MustCompile("^\\+*$")
+var regexpIsDayKeyword = regexp.MustCompile("(?i)^day$")
 
 // ParseLine cuts a FLE line into useful bits
 func ParseLine(inputStr string, previousLine LogLine) (logLine LogLine, errorMsg string) {
@@ -119,6 +123,46 @@ func ParseLine(inputStr string, previousLine LogLine) (logLine LogLine, errorMsg
 			continue
 		}
 
+		//Date?
+		if regexpDatePattern.MatchString(element) {
+			//We probably have a date, let's normalize it
+			errorTxt := ""
+			normalizedDate := ""
+			normalizedDate, errorTxt = NormalizeDate(element)
+			if len(errorTxt) != 0 {
+				logLine.Date = normalizedDate
+				errorMsg = errorMsg + fmt.Sprintf("Invalid Date: %s (%s)", element, errorTxt)
+			} else {
+				logLine.Date, errorTxt = ValidateDate(normalizedDate)
+				if len(errorTxt) != 0 {
+					errorMsg = errorMsg + fmt.Sprintf("Error %s", errorTxt)
+				}
+			}
+			continue
+		}
+
+		// The date keyword is not really useful, skip it
+		if regexpIsDateKeyWord.MatchString(element) {
+			continue
+		}
+
+		//Skip the "day" keyword
+		if regexpIsDayKeyword.MatchString(element) {
+			continue
+		}
+
+		//Scan the + part
+		if regexpDayIncrementPattern.MatchString(element) {
+			increment := len(element)
+			fmt.Println(logLine.Date)
+			newDate, dateError := IncrementDate(logLine.Date, increment)
+			if dateError != "" {
+				errorMsg = errorMsg + fmt.Sprintf(dateError)
+			}
+			logLine.Date = newDate
+			continue
+		}
+
 		// Is it a band?
 		isBandElement, bandLowerLimit, bandUpperLimit, _ := IsBand(element)
 		if isBandElement {
@@ -257,7 +301,7 @@ func ParseLine(inputStr string, previousLine LogLine) (logLine LogLine, errorMsg
 		}
 
 		//If we come here, we could not make sense of what we found
-		errorMsg = errorMsg + "Unable to make sense of [" + element + "]."
+		errorMsg = errorMsg + "Unable to make sense of [" + element + "]. "
 
 	}
 

fleprocess/parse_line_test.go

@@ -70,7 +70,7 @@ func TestParseLine(t *testing.T) {
 		{
 			"Wrong mode",
 			args{inputStr: "cww", previousLine: LogLine{Mode: "SSB"}},
-			LogLine{Mode: "SSB", RSTsent: "59", RSTrcvd: "59"}, "Unable to make sense of [cww].",
+			LogLine{Mode: "SSB", RSTsent: "59", RSTrcvd: "59"}, "Unable to make sense of [cww]. ",
 		},
 		{
 			"Parse OM name",
@@ -152,6 +152,36 @@ func TestParseLine(t *testing.T) {
 			args{inputStr: "1230 oe6cud/p onff-0258", previousLine: LogLine{Mode: "FM", ModeType: "PHONE"}},
 			LogLine{Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE", WWFF: "ONFF-0258"}, "",
 		},
+		{
+			"date processing",
+			args{inputStr: "20.09.7 1230 oe6cud/p onff-0258", previousLine: LogLine{Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "2020-09-07", Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE", WWFF: "ONFF-0258"}, "",
+		},
+		{
+			"date processing (with keyword)",
+			args{inputStr: "Date 20.09.7 1230 oe6cud/p onff-0258", previousLine: LogLine{Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "2020-09-07", Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE", WWFF: "ONFF-0258"}, "",
+		},
+		{
+			"date processing - validation error",
+			args{inputStr: "20.09.34 1230 oe6cud/p onff-0258", previousLine: LogLine{Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "*2020-09-34", Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE", WWFF: "ONFF-0258"}, "Error parsing time \"2020-09-34\": day out of range",
+		},
+		{
+			"date processing - day ",
+			args{inputStr: "day ++ 1230 oe6cud/p ", previousLine: LogLine{Date: "2020-09-05", Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "2020-09-07", Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE"}, "",
+		},
+		{
+			"date processing - day (error) ",
+			args{inputStr: "day +++++++++++ 1230 oe6cud/p ", previousLine: LogLine{Date: "2020-09-05", Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "*2020-09-05", Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "59", RSTrcvd: "59", Mode: "FM", ModeType: "PHONE"}, "Invalid day increment, expecting smaller or equal to 10",
+		},
+		{
+			"date band and mode on the same line)",
+			args{inputStr: "Date 20.09.7 40m cw 1230 oe6cud/p onff-0258", previousLine: LogLine{Mode: "FM", ModeType: "PHONE"}},
+			LogLine{Date: "2020-09-07", Mode: "CW", Band: "40m", BandLowerLimit: 7.0, BandUpperLimit: 7.3, Call: "OE6CUD/P", Time: "1230", ActualTime: "1230", RSTsent: "599", RSTrcvd: "599", ModeType: "CW", WWFF: "ONFF-0258"}, "",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

fleprocess/validate.go

@@ -142,7 +142,6 @@ func NormalizeDate(inputStr string) (date, errorMsg string) {
 		return "*" + inputStr, errorMsg
 	}
 
-
 	//complete the numbers if shorter than expected ("20" for the first and "0" for the two next)
 	year := s[0]
 	if len(year) == 2 {
@@ -194,6 +193,29 @@ func ValidateDate(inputStr string) (ref, errorMsg string) {
 	return wrongInputStr, fmt.Sprint(err)
 }
 
+//IncrementDate will increment the supplied date by the specified increment. It returns the new date.
+func IncrementDate(date string, increment int) (newdate string, err string) {
+	if date == "" {
+		return "", "No date to increment"
+	}
+	if increment < 1 {
+		return "*" + date, "Invalid day increment, expecting greater or equal to 1"
+	}
+	if 10 < increment {
+		return "*" + date, "Invalid day increment, expecting smaller or equal to 10"
+	}
+
+	const RFC3339FullDate = "2006-01-02"
+	convertedTime, timeErr := time.Parse(RFC3339FullDate, date)
+	if timeErr != nil {
+		return "*" + date, "(Internal error) error " + fmt.Sprint(timeErr)
+	}
+	// the number of days specified in increment
+	newDate := convertedTime.AddDate(0, 0, increment)
+
+	return newDate.Format(RFC3339FullDate), ""
+}
+
 //IsBand retuns true if the passed input string is a valid string
 func IsBand(inputStr string) (result bool, lowerLimit, upperLimit float64, altBandName string) {
 	switch strings.ToLower(inputStr) {

fleprocess/validate_test.go

@@ -455,3 +455,53 @@ func TestNormalizeDate(t *testing.T) {
 		})
 	}
 }
+
+func TestIncrementDate(t *testing.T) {
+	type args struct {
+		date      string
+		increment int
+	}
+	tests := []struct {
+		name        string
+		args        args
+		wantNewdate string
+		wantErr     string
+	}{
+		{
+			"No date",
+			args{date: "", increment: 2},
+			"", "No date to increment",
+		},
+		{
+			"increment below 0",
+			args{date: "2020-09-05", increment: 0},
+			"*2020-09-05", "Invalid day increment, expecting greater or equal to 1",
+		},
+		{
+			"increment above 10",
+			args{date: "2020-09-05", increment: 11},
+			"*2020-09-05", "Invalid day increment, expecting smaller or equal to 10",
+		},
+		{
+			"Invalid date",
+			args{date: "2020-09-32", increment: 2},
+			"*2020-09-32", "(Internal error) error parsing time \"2020-09-32\": day out of range",
+		},
+		{
+			"happy case",
+			args{date: "2020-09-05", increment: 2},
+			"2020-09-07", "",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotNewdate, gotErr := IncrementDate(tt.args.date, tt.args.increment)
+			if gotNewdate != tt.wantNewdate {
+				t.Errorf("IncrementDate() gotNewdate = %v, want %v", gotNewdate, tt.wantNewdate)
+			}
+			if gotErr != tt.wantErr {
+				t.Errorf("IncrementDate() gotErr = %v, want %v", gotErr, tt.wantErr)
+			}
+		})
+	}
+}