1 files changed, 108 insertions, 0 deletions
diff --git a/vendor/github.com/wiggin77/cfg/timeconv/parse.go b/vendor/github.com/wiggin77/cfg/timeconv/parse.go
new file mode 100644
index 00000000..218ef43a
--- /dev/null
+++ b/vendor/github.com/wiggin77/cfg/timeconv/parse.go
@@ -0,0 +1,108 @@
+package timeconv
+
+import (
+	"fmt"
+	"math"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// MillisPerSecond is the number of millseconds per second.
+const MillisPerSecond int64 = 1000
+
+// MillisPerMinute is the number of millseconds per minute.
+const MillisPerMinute int64 = MillisPerSecond * 60
+
+// MillisPerHour is the number of millseconds per hour.
+const MillisPerHour int64 = MillisPerMinute * 60
+
+// MillisPerDay is the number of millseconds per day.
+const MillisPerDay int64 = MillisPerHour * 24
+
+// MillisPerWeek is the number of millseconds per week.
+const MillisPerWeek int64 = MillisPerDay * 7
+
+// MillisPerYear is the approximate number of millseconds per year.
+const MillisPerYear int64 = MillisPerDay*365 + int64((float64(MillisPerDay) * 0.25))
+
+// ParseMilliseconds parses a string containing a number plus
+// a unit of measure for time and returns the number of milliseconds
+// it represents.
+//
+// Example:
+// * "1 second" returns 1000
+// * "1 minute" returns 60000
+// * "1 hour" returns 3600000
+//
+// See config.UnitsToMillis for a list of supported units of measure.
+func ParseMilliseconds(str string) (int64, error) {
+	s := strings.TrimSpace(str)
+	reg := regexp.MustCompile("([0-9\\.\\-+]*)(.*)")
+	matches := reg.FindStringSubmatch(s)
+	if matches == nil || len(matches) < 1 || matches[1] == "" {
+		return 0, fmt.Errorf("invalid syntax - '%s'", s)
+	}
+	digits := matches[1]
+	units := "ms"
+	if len(matches) > 1 && matches[2] != "" {
+		units = matches[2]
+	}
+
+	fDigits, err := strconv.ParseFloat(digits, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	msPerUnit, err := UnitsToMillis(units)
+	if err != nil {
+		return 0, err
+	}
+
+	// Check for overflow.
+	fms := float64(msPerUnit) * fDigits
+	if fms > math.MaxInt64 || fms < math.MinInt64 {
+		return 0, fmt.Errorf("out of range - '%s' overflows", s)
+	}
+	ms := int64(fms)
+	return ms, nil
+}
+
+// UnitsToMillis returns the number of milliseconds represented by the specified unit of measure.
+//
+// Example:
+// * "second" returns 1000	<br/>
+// * "minute" returns 60000	<br/>
+// * "hour" returns 3600000	<br/>
+//
+// Supported units of measure:
+// * "milliseconds", "millis", "ms", "millisecond"
+// * "seconds", "sec", "s", "second"
+// * "minutes", "mins", "min", "m", "minute"
+// * "hours", "h", "hour"
+// * "days", "d", "day"
+// * "weeks", "w", "week"
+// * "years", "y", "year"
+func UnitsToMillis(units string) (ms int64, err error) {
+	u := strings.TrimSpace(units)
+	u = strings.ToLower(u)
+	switch u {
+	case "milliseconds", "millisecond", "millis", "ms":
+		ms = 1
+	case "seconds", "second", "sec", "s":
+		ms = MillisPerSecond
+	case "minutes", "minute", "mins", "min", "m":
+		ms = MillisPerMinute
+	case "hours", "hour", "h":
+		ms = MillisPerHour
+	case "days", "day", "d":
+		ms = MillisPerDay
+	case "weeks", "week", "w":
+		ms = MillisPerWeek
+	case "years", "year", "y":
+		ms = MillisPerYear
+	default:
+		err = fmt.Errorf("invalid syntax - '%s' not a supported unit of measure", u)
+	}
+	return
+}