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package text
import (
"net/url"
"strings"
"unicode"
)
// Empty tell if the string is considered empty once space
// and not graphics characters are removed
func Empty(s string) bool {
trim := strings.TrimFunc(s, func(r rune) bool {
return unicode.IsSpace(r) || !unicode.IsGraphic(r)
})
return trim == ""
}
// Safe will tell if a character in the string is considered unsafe
// Currently trigger on unicode control character except \n, \t and \r
func Safe(s string) bool {
for _, r := range s {
switch r {
case '\t', '\r', '\n':
continue
}
if unicode.IsControl(r) {
return false
}
}
return true
}
// ValidUrl will tell if the string contains what seems to be a valid URL
func ValidUrl(s string) bool {
if strings.Contains(s, "\n") {
return false
}
_, err := url.ParseRequestURI(s)
return err == nil
}
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