photoprism/pkg/fs/id.go

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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.IsUnique(base, 0) {
return true
} else if IsCanonical(base) {
return true
}
return false
}