Carlos Florêncio
37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
package service
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import (
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"errors"
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"fmt"
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"unicode/utf8"
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)
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// TaskTitleMaxLength is the maximum number of characters allowed in a new or
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// replacement task title.
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const TaskTitleMaxLength = 60
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// ErrTaskTitleTooLong identifies a task title that exceeds TaskTitleMaxLength.
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var ErrTaskTitleTooLong = errors.New("task title is too long")
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// ValidateTaskTitle checks whether title fits the task title character limit.
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func ValidateTaskTitle(title string) error {
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if utf8.RuneCountInString(title) <= TaskTitleMaxLength {
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return nil
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}
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return fmt.Errorf("%w: task titles must be %d characters or fewer", ErrTaskTitleTooLong, TaskTitleMaxLength)
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}
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// TruncateTaskTitle shortens title to the task title limit, reserving the last
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// character for an ellipsis when truncation is required.
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func TruncateTaskTitle(title string) string {
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characters := []rune(title)
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if len(characters) <= TaskTitleMaxLength {
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return title
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}
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return string(characters[:TaskTitleMaxLength-1]) + "…"
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}
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func validateTaskTitle(title string) error {
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return ValidateTaskTitle(title)
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}
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