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package part
import (
"fmt"
"reflect"
"strings"
)
type Parts []Part
func NewParts(s string) Parts {
var parts []Part
if s == "" {
return parts
}
for _, p := range strings.Split(s, ".") {
parts = append(parts, NewPart(p))
}
return parts
}
func (parts Parts) Normalize() Parts {
ret := make(Parts, len(parts))
copy(ret, parts)
for i := len(ret) - 1; i >= 0; i-- {
lastItem := ret[i]
if lastItem.IsNull() {
ret = ret[:i]
continue
}
break
}
return ret
}
func (parts Parts) Padding(size int, padding Part) Parts {
diff := size - len(parts)
if diff <= 0 {
return parts
}
padded := parts
for i := 0; i < diff; i++ {
padded = append(padded, padding)
}
return padded
}
func (parts Parts) Compare(other Part) int {
if other == nil {
return 1
} else if other.IsAny() {
return 0
}
var o Parts
switch t := other.(type) {
case InfinityType:
return -1
case NegativeInfinityType:
return 1
case Parts:
o = t
default:
return -1
}
if reflect.DeepEqual(parts, o) {
return 0
}
iter := parts.Zip(o)
for tuple := iter(); tuple != nil; tuple = iter() {
var l, r = tuple.Left, tuple.Right
if l == nil {
return -1
}
if r == nil {
return 1
}
if l.IsAny() || r.IsAny() {
return 0
}
if result := l.Compare(r); result != 0 {
return result
}
}
return 0
}
func (parts Parts) IsNull() bool {
return parts.IsAny() || len(parts) == 0
}
func (parts Parts) IsAny() bool {
for _, p := range parts {
if p.IsAny() {
return true
}
}
return false
}
func (parts Parts) IsEmpty() bool {
return false
}
func (parts Parts) String() string {
s := make([]string, len(parts))
for i, p := range parts {
s[i] = fmt.Sprint(p)
}
return strings.Join(s, ".")
}
type ZipTuple struct {
Left Part
Right Part
}
func (parts Parts) Zip(other Parts) func() *ZipTuple {
i := 0
return func() *ZipTuple {
var part1, part2 Part
if i < len(parts) {
part1 = parts[i]
}
if i < len(other) {
part2 = other[i]
}
if part1 == nil && part2 == nil {
return nil
}
i++
return &ZipTuple{Left: part1, Right: part2}
}
}
func Uint64SliceToParts(uint64Parts []Uint64) Parts {
parts := make(Parts, len(uint64Parts))
for i, u := range uint64Parts {
parts[i] = u
}
return parts
}
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