introduce iso8601_duration directly

README.md

@@ -99,11 +99,6 @@ device.Authenticate("username", "password")
 resp, err := dev.CallMethod(createUsers)
 ```
 
-## TO TO
-
-+ [] merge Golang-iso8601-duration ,directly
-+ ..
-
 ## Great Thanks
 
 Modified from: [goonvif](https://github.com/yakovlevdmv/goonvif)

xsd/built_in.go

@@ -11,7 +11,7 @@ import (
 	"strings"
 	"time"
 
-	iso8601 "github.com/yakovlevdmv/Golang-iso8601-duration"
+	"github.com/use-go/onvif/xsd/iso8601"
 )
 
 /*

xsd/iso8601/iso8601_duration.go

@@ -0,0 +1,104 @@
+package iso8601
+
+import (
+	"errors"
+	"regexp"
+)
+
+//Duration of iso8601
+type Duration struct {
+	years  string //= number of years
+	months string //= number of months
+	days   string //= number of days
+	// Time section
+	hours   string //= the number of hours
+	minutes string //= the number of minutes
+	seconds string //= the number of seconds
+}
+
+//NewDuration return duration
+func NewDuration(years, months, days, hours, minutes, seconds string) (*Duration, error) {
+	// Pattern for Years, Months, Days, Hours and Minutes components
+	pattern1 := "^$|[0-9]+"
+	// Pattern for Seconds component
+	pattern2 := "^$|[0-9]+(\\.[0-9]+)?"
+
+	matched, err := regexp.MatchString(pattern1, years)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("years value = " + years + " does not match pattern " + pattern1)
+	}
+
+	matched, err = regexp.MatchString(pattern1, months)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("months value = " + months + " does not match pattern " + pattern1)
+	}
+
+	matched, err = regexp.MatchString(pattern1, days)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("months value = " + days + " does not match pattern " + pattern1)
+	}
+
+	matched, err = regexp.MatchString(pattern1, hours)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("months value = " + hours + " does not match pattern " + pattern1)
+	}
+
+	matched, err = regexp.MatchString(pattern1, minutes)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("months value = " + minutes + " does not match pattern " + pattern1)
+	}
+
+	matched, err = regexp.MatchString(pattern2, seconds)
+	if err != nil {
+		return nil, err
+	} else if !matched {
+		return nil, errors.New("years value = " + seconds + " does not match pattern " + pattern2)
+	}
+
+	return &Duration{years: years, months: months, hours: hours, days: days, minutes: minutes, seconds: seconds}, nil
+}
+
+//ISO8601Duration to string
+func (duration Duration) ISO8601Duration() string {
+	var result string
+	result += "P" // time duration designator
+	//years
+	if duration.years != "" {
+		result += duration.years + "Y"
+	}
+	if duration.months != "" {
+		result += duration.months + "M"
+	}
+	if duration.days != "" {
+		result += duration.days + "D"
+	}
+
+	if duration.hours != "" && duration.minutes != "" && duration.seconds != "" {
+		result += "T"
+		if duration.hours != "" {
+			result += duration.hours + "H"
+		}
+		if duration.minutes != "" {
+			result += duration.minutes + "M"
+		}
+		if duration.seconds != "" {
+			result += duration.seconds + "S"
+		}
+	}
+
+	if len(result) == 1 {
+		result += "T0S"
+	}
+
+	return result
+}