Function ParseSchedule

pkg/parser/schedule_parser.go:27–59

ParseSchedule converts a human-friendly schedule expression into a cron expression Returns the cron expression and the original friendly format for comments

(input string)

// ParseSchedule converts a human-friendly schedule expression into a cron expression
// Returns the cron expression and the original friendly format for comments
func ParseSchedule(input string) (cron string, original string, err error) {
	scheduleLog.Printf("Parsing schedule expression: %s", input)
	input = strings.TrimSpace(input)
	if input == "" {
		return "", "", errors.New("schedule expression cannot be empty")
	}

	// If it's already a cron expression (5 fields separated by spaces), return as-is
	if IsCronExpression(input) {
		scheduleLog.Printf("Input is already a valid cron expression: %s", input)
		return input, "", nil
	}

	parser := &ScheduleParser{
		input: input,
	}

	// Tokenize the input
	if err := parser.tokenize(); err != nil {
		scheduleLog.Printf("Tokenization failed: %s", err)
		return "", "", err
	}

	// Parse the tokens
	cronExpr, err := parser.parse()
	if err != nil {
		scheduleLog.Printf("Parsing failed: %s", err)
		return "", "", err
	}

	scheduleLog.Printf("Successfully parsed schedule to cron: %s", cronExpr)
	return cronExpr, input, nil
}

// tokenize breaks the input into tokens
func (p *ScheduleParser) tokenize() error {