photoprism/pkg/txt/contains.go

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package txt
import (
"regexp"
"unicode"
)
var ContainsNumberRegexp = regexp.MustCompile("\\d+")
// ContainsNumber returns true if string contains a number.
func ContainsNumber(s string) bool {
return ContainsNumberRegexp.MatchString(s)
}
// ContainsLetters reports whether the string only contains letters.
func ContainsLetters(s string) bool {
if s == "" {
return false
}
for _, r := range s {
if !unicode.IsLetter(r) {
return false
}
}
return true
}
// ContainsASCIILetters reports if the string only contains ascii chars without whitespace, numbers, and punctuation marks.
func ContainsASCIILetters(s string) bool {
for _, r := range s {
if (r < 65 || r > 90) && (r < 97 || r > 122) {
return false
}
}
return true
}
// ContainsSymbols reports whether the string only contains symbolic characters.
func ContainsSymbols(s string) bool {
if s == "" {
return false
}
for _, r := range s {
if !unicode.IsSymbol(r) {
return false
}
}
return true
}