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package special
import (
"encoding/json"
"fmt"
"strings"
"github.com/Loyalsoldier/geoip/lib"
)
const (
TypeCutter = "cutter"
DescCutter = "Remove data from previous steps"
)
func init() {
lib.RegisterInputConfigCreator(TypeCutter, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
return NewCutterFromBytes(action, data)
})
lib.RegisterInputConverter(TypeCutter, &cutter{
Description: DescCutter,
})
}
func NewCutter(action lib.Action, opts ...lib.InputOption) lib.InputConverter {
c := &cutter{
Type: TypeCutter,
Action: action,
Description: DescCutter,
}
for _, opt := range opts {
if opt != nil {
opt(c)
}
}
return c
}
func WithCutterWantedList(lists []string) lib.InputOption {
return func(c lib.InputConverter) {
wantList := make(map[string]bool)
for _, want := range lists {
if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
wantList[want] = true
}
}
c.(*cutter).Want = wantList
}
}
func WithCutterOnlyIPType(onlyIPType lib.IPType) lib.InputOption {
return func(c lib.InputConverter) {
c.(*cutter).OnlyIPType = onlyIPType
}
}
func NewCutterFromBytes(action lib.Action, data []byte) (lib.InputConverter, error) {
var tmp struct {
Want []string `json:"wantedList"`
OnlyIPType lib.IPType `json:"onlyIPType"`
}
if len(data) > 0 {
if err := json.Unmarshal(data, &tmp); err != nil {
return nil, err
}
}
if action != lib.ActionRemove {
return nil, fmt.Errorf("❌ [type %s] only supports `remove` action", TypeCutter)
}
// Filter want list
wantList := make(map[string]bool)
for _, want := range tmp.Want {
if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
wantList[want] = true
}
}
if len(wantList) == 0 {
return nil, fmt.Errorf("❌ [type %s] wantedList must be specified", TypeCutter)
}
return NewCutter(
action,
WithCutterWantedList(tmp.Want),
WithCutterOnlyIPType(tmp.OnlyIPType),
), nil
}
type cutter struct {
Type string
Action lib.Action
Description string
Want map[string]bool
OnlyIPType lib.IPType
}
func (c *cutter) GetType() string {
return c.Type
}
func (c *cutter) GetAction() lib.Action {
return c.Action
}
func (c *cutter) GetDescription() string {
return c.Description
}
func (c *cutter) Input(container lib.Container) (lib.Container, error) {
ignoreIPType := lib.GetIgnoreIPType(c.OnlyIPType)
for entry := range container.Loop() {
if len(c.Want) > 0 && !c.Want[entry.GetName()] {
continue
}
if err := container.Remove(entry, lib.CaseRemoveEntry, ignoreIPType); err != nil {
return nil, err
}
}
return container, nil
}
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