photoprism/internal/entity/string.go

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package entity
import (
"strings"
)
const (
ClipStringType = 64
)
// ToASCII removes all non-ascii characters from a string and returns it.
func ToASCII(s string) string {
result := make([]rune, 0, len(s))
for _, r := range s {
if r <= 127 {
result = append(result, r)
}
}
return string(result)
}
// Clip shortens a string to the given number of characters, and removes all leading and trailing white space.
func Clip(s string, maxLen int) string {
s = strings.TrimSpace(s)
l := len(s)
if l <= maxLen {
return s
} else {
return s[:maxLen]
}
}
// SanitizeStringType omits invalid runes, ensures a maximum length of 32 characters, and returns the result.
func SanitizeStringType(s string) string {
return Clip(ToASCII(s), ClipStringType)
}
// SanitizeStringTypeLower converts a type string to lowercase, omits invalid runes, and shortens it if needed.
func SanitizeStringTypeLower(s string) string {
return SanitizeStringType(strings.ToLower(s))
}
// TypeString returns an entity type string for logging.
func TypeString(entityType string) string {
if entityType == "" {
return "unknown"
}
return entityType
}