Add forecast daypart derivation

internal/config/validate.go

@@ -3,7 +3,6 @@ package config
 import (
 	"fmt"
 	"net/url"
-	"strconv"
 	"strings"
 
 	"gitea.maximumdirect.net/eric/weatherreporter/internal/timeutil"
@@ -69,10 +68,10 @@ func Validate(cfg Config) error {
 		if strings.TrimSpace(daypart.Name) == "" {
 			return fmt.Errorf("dayparts[%d].name is required", i)
 		}
-		if err := validateClockTime(daypart.Start); err != nil {
+		if _, err := timeutil.ParseClock(daypart.Start); err != nil {
 			return fmt.Errorf("dayparts[%d].start is invalid: %w", i, err)
 		}
-		if err := validateClockTime(daypart.End); err != nil {
+		if _, err := timeutil.ParseClock(daypart.End); err != nil {
 			return fmt.Errorf("dayparts[%d].end is invalid: %w", i, err)
 		}
 	}
@@ -87,28 +86,3 @@ func validatePolicy(name string, policy MissingSourcePolicy) error {
 		return fmt.Errorf("%s must be one of error, warn, or none", name)
 	}
 }
-
-func validateClockTime(value string) error {
-	parts := strings.Split(value, ":")
-	if len(parts) != 2 {
-		return fmt.Errorf("expected HH:MM")
-	}
-	hour, err := strconv.Atoi(parts[0])
-	if err != nil {
-		return fmt.Errorf("invalid hour")
-	}
-	minute, err := strconv.Atoi(parts[1])
-	if err != nil {
-		return fmt.Errorf("invalid minute")
-	}
-	if hour < 0 || hour > 24 {
-		return fmt.Errorf("hour must be between 00 and 24")
-	}
-	if minute < 0 || minute > 59 {
-		return fmt.Errorf("minute must be between 00 and 59")
-	}
-	if hour == 24 && minute != 0 {
-		return fmt.Errorf("24 is only valid as 24:00")
-	}
-	return nil
-}