package fs import ( "regexp" "github.com/photoprism/photoprism/pkg/rnd" ) var DscNameRegexp = regexp.MustCompile("\\D{3}[\\d_]\\d{4,8}_?\\d{0,6}_?\\d{0,6}[\\.jpgJPGXx]{0,4}") var UniqueNameRegexp = regexp.MustCompile("[a-f0-9]{8,16}_[a-f0-9]{6,16}_[A-Za-z0-9]{1,20}_?[A-Za-z0-9]{0,4}") // Example: 8263987746_d0a6055c58_o var UUIDNameRegexp = regexp.MustCompile("[A-Fa-f0-9\\-]{16,36}_?[A-Za-z0-9_]{0,20}") // Example: 8263987746_d0a6055c58_o // IsInt tests if the file base is an integer number. func IsInt(s string) bool { if s == "" { return false } for _, r := range s { if r < 48 || r > 57 { return false } } return true } // IsAsciiID tests if the string is a file name that only contains uppercase ascii letters and numbers like "IQVG4929". func IsAsciiID(s string) bool { if s == "" { return false } for _, r := range s { if (r < 65 || r > 90) && (r < 48 || r > 57) && r != 45 && r != 95 { return false } } return true } // IsUniqueName tests if the string looks like a unique file name. func IsUniqueName(s string) bool { if s == "" { return false } if m := UniqueNameRegexp.FindString(s); s == m { return true } else if m := UUIDNameRegexp.FindString(s); s == m { return true } return false } // IsDscName tests if the string looks like a file name generated by a camera. func IsDscName(s string) bool { if s == "" { return false } if m := DscNameRegexp.FindString(s); s == m { return true } return false } // IsGenerated tests if the file name looks like an automatically generated identifier. func IsGenerated(fileName string) bool { if fileName == "" { return false } base := BasePrefix(fileName, false) if IsAsciiID(base) { return true } else if IsHash(base) { return true } else if IsInt(base) { return true } else if IsDscName(base) { return true } else if IsUniqueName(base) { return true } else if rnd.IsUID(base, 0) { return true } else if IsCanonical(base) { return true } return false }