Refactor: all plugin subdirectories use option patterncopilot/modify-plugin-files-subdirectories

Apply the same functional options pattern from plugin/singbox to:
- plugin/mihomo (mrs_in.go, mrs_out.go)
- plugin/plaintext (text_in.go, common_in.go, common_out.go, text_out.go, clash_in.go, clash_out.go, json_in.go, surge_in.go, surge_out.go)
- plugin/maxmind (all input/output files)
- plugin/v2ray (dat_in.go, dat_out.go)
- plugin/special (cutter.go, lookup.go, private.go, stdin.go, stdout.go)
- lookup.go and merge.go updated to use new constructors

Co-authored-by: Loyalsoldier <[email protected]>

10 files changed, 312 insertions, 145 deletions

diff --git a/plugin/maxmind/common_in.go b/plugin/maxmind/common_in.go
index 3d97388c..fd34a735 100644
--- a/plugin/maxmind/common_in.go
+++ b/plugin/maxmind/common_in.go
@@ -3,7 +3,6 @@ package maxmind
 import (
 	"encoding/json"
 	"path/filepath"
-	"strings"
 
 	"github.com/Loyalsoldier/geoip/lib"
 )
@@ -14,7 +13,7 @@ var (
 	defaultIPInfoCountryMMDBFile   = filepath.Join("./", "ipinfo", "country.mmdb")
 )
 
-func newGeoLite2CountryMMDBIn(iType string, iDesc string, action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
+func NewGeoLite2CountryMMDBInFromBytes(iType string, iDesc string, action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
 	var tmp struct {
 		URI        string     `json:"uri"`
 		Want       []string   `json:"wantedList"`
@@ -40,20 +39,10 @@ func newGeoLite2CountryMMDBIn(iType string, iDesc string, action lib.Action, dat
 		}
 	}
 
-	// Filter want list
-	wantList := make(map[string]bool)
-	for _, want := range tmp.Want {
-		if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
-			wantList[want] = true
-		}
-	}
-
-	return &GeoLite2CountryMMDBIn{
-		Type:        iType,
-		Action:      action,
-		Description: iDesc,
-		URI:         tmp.URI,
-		Want:        wantList,
-		OnlyIPType:  tmp.OnlyIPType,
-	}, nil
+	return NewGeoLite2CountryMMDBIn(
+		iType, iDesc, action,
+		WithURI(tmp.URI),
+		WithInputWantedList(tmp.Want),
+		WithInputOnlyIPType(tmp.OnlyIPType),
+	), nil
 }
diff --git a/plugin/maxmind/common_out.go b/plugin/maxmind/common_out.go
index 21063faa..4ad8b909 100644
--- a/plugin/maxmind/common_out.go
+++ b/plugin/maxmind/common_out.go
@@ -100,7 +100,7 @@ func (d dbipCountry) HasData() bool {
 	return d != zeroDBIPCountry
 }
 
-func newGeoLite2CountryMMDBOut(iType string, iDesc string, action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
+func NewGeoLite2CountryMMDBOutFromBytes(iType string, iDesc string, action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
 	var tmp struct {
 		OutputName string     `json:"outputName"`
 		OutputDir  string     `json:"outputDir"`
@@ -118,39 +118,19 @@ func newGeoLite2CountryMMDBOut(iType string, iDesc string, action lib.Action, da
 		}
 	}
 
-	if tmp.OutputName == "" {
-		tmp.OutputName = defaultGeoLite2CountryMMDBOutputName
-	}
-
-	if tmp.OutputDir == "" {
-		switch iType {
-		case TypeGeoLite2CountryMMDBOut:
-			tmp.OutputDir = defaultMaxmindOutputDir
-
-		case TypeDBIPCountryMMDBOut:
-			tmp.OutputDir = defaultDBIPOutputDir
-
-		case TypeIPInfoCountryMMDBOut:
-			tmp.OutputDir = defaultIPInfoOutputDir
-		}
-	}
-
-	return &GeoLite2CountryMMDBOut{
-		Type:        iType,
-		Action:      action,
-		Description: iDesc,
-		OutputName:  tmp.OutputName,
-		OutputDir:   tmp.OutputDir,
-		Want:        tmp.Want,
-		Overwrite:   tmp.Overwrite,
-		Exclude:     tmp.Exclude,
-		OnlyIPType:  tmp.OnlyIPType,
-
-		SourceMMDBURI: tmp.SourceMMDBURI,
-	}, nil
+	return NewGeoLite2CountryMMDBOut(
+		iType, iDesc, action,
+		WithOutputName(tmp.OutputName),
+		WithOutputDir(tmp.OutputDir, iType),
+		WithOutputWantedList(tmp.Want),
+		WithOutputOverwriteList(tmp.Overwrite),
+		WithOutputExcludedList(tmp.Exclude),
+		WithOutputOnlyIPType(tmp.OnlyIPType),
+		WithSourceMMDBURI(tmp.SourceMMDBURI),
+	), nil
 }
 
-func (g *GeoLite2CountryMMDBOut) GetExtraInfo() (map[string]any, error) {
+func (g *geoLite2CountryMMDBOut) GetExtraInfo() (map[string]any, error) {
 	if strings.TrimSpace(g.SourceMMDBURI) == "" {
 		return nil, nil
 	}
diff --git a/plugin/maxmind/dbip_country_mmdb_in.go b/plugin/maxmind/dbip_country_mmdb_in.go
index 304f29e5..713b9626 100644
--- a/plugin/maxmind/dbip_country_mmdb_in.go
+++ b/plugin/maxmind/dbip_country_mmdb_in.go
@@ -18,9 +18,9 @@ const (
 
 func init() {
 	lib.RegisterInputConfigCreator(TypeDBIPCountryMMDBIn, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
-		return newGeoLite2CountryMMDBIn(TypeDBIPCountryMMDBIn, DescDBIPCountryMMDBIn, action, data)
+		return NewGeoLite2CountryMMDBInFromBytes(TypeDBIPCountryMMDBIn, DescDBIPCountryMMDBIn, action, data)
 	})
-	lib.RegisterInputConverter(TypeDBIPCountryMMDBIn, &GeoLite2CountryMMDBIn{
+	lib.RegisterInputConverter(TypeDBIPCountryMMDBIn, &geoLite2CountryMMDBIn{
 		Description: DescDBIPCountryMMDBIn,
 	})
 }
diff --git a/plugin/maxmind/dbip_country_mmdb_out.go b/plugin/maxmind/dbip_country_mmdb_out.go
index 77857d95..73d8c5a8 100644
--- a/plugin/maxmind/dbip_country_mmdb_out.go
+++ b/plugin/maxmind/dbip_country_mmdb_out.go
@@ -18,9 +18,9 @@ const (
 
 func init() {
 	lib.RegisterOutputConfigCreator(TypeDBIPCountryMMDBOut, func(action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
-		return newGeoLite2CountryMMDBOut(TypeDBIPCountryMMDBOut, DescDBIPCountryMMDBOut, action, data)
+		return NewGeoLite2CountryMMDBOutFromBytes(TypeDBIPCountryMMDBOut, DescDBIPCountryMMDBOut, action, data)
 	})
-	lib.RegisterOutputConverter(TypeDBIPCountryMMDBOut, &GeoLite2CountryMMDBOut{
+	lib.RegisterOutputConverter(TypeDBIPCountryMMDBOut, &geoLite2CountryMMDBOut{
 		Description: DescDBIPCountryMMDBOut,
 	})
 }
diff --git a/plugin/maxmind/ipinfo_country_mmdb_in.go b/plugin/maxmind/ipinfo_country_mmdb_in.go
index 8551e453..c27bafa3 100644
--- a/plugin/maxmind/ipinfo_country_mmdb_in.go
+++ b/plugin/maxmind/ipinfo_country_mmdb_in.go
@@ -18,9 +18,9 @@ const (
 
 func init() {
 	lib.RegisterInputConfigCreator(TypeIPInfoCountryMMDBIn, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
-		return newGeoLite2CountryMMDBIn(TypeIPInfoCountryMMDBIn, DescIPInfoCountryMMDBIn, action, data)
+		return NewGeoLite2CountryMMDBInFromBytes(TypeIPInfoCountryMMDBIn, DescIPInfoCountryMMDBIn, action, data)
 	})
-	lib.RegisterInputConverter(TypeIPInfoCountryMMDBIn, &GeoLite2CountryMMDBIn{
+	lib.RegisterInputConverter(TypeIPInfoCountryMMDBIn, &geoLite2CountryMMDBIn{
 		Description: DescIPInfoCountryMMDBIn,
 	})
 }
diff --git a/plugin/maxmind/ipinfo_country_mmdb_out.go b/plugin/maxmind/ipinfo_country_mmdb_out.go
index bed18af7..e10b4ca6 100644
--- a/plugin/maxmind/ipinfo_country_mmdb_out.go
+++ b/plugin/maxmind/ipinfo_country_mmdb_out.go
@@ -18,9 +18,9 @@ const (
 
 func init() {
 	lib.RegisterOutputConfigCreator(TypeIPInfoCountryMMDBOut, func(action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
-		return newGeoLite2CountryMMDBOut(TypeIPInfoCountryMMDBOut, DescIPInfoCountryMMDBOut, action, data)
+		return NewGeoLite2CountryMMDBOutFromBytes(TypeIPInfoCountryMMDBOut, DescIPInfoCountryMMDBOut, action, data)
 	})
-	lib.RegisterOutputConverter(TypeIPInfoCountryMMDBOut, &GeoLite2CountryMMDBOut{
+	lib.RegisterOutputConverter(TypeIPInfoCountryMMDBOut, &geoLite2CountryMMDBOut{
 		Description: DescIPInfoCountryMMDBOut,
 	})
 }
diff --git a/plugin/maxmind/maxmind_asn_csv_in.go b/plugin/maxmind/maxmind_asn_csv_in.go
index d924e3f9..43a4ff11 100644
--- a/plugin/maxmind/maxmind_asn_csv_in.go
+++ b/plugin/maxmind/maxmind_asn_csv_in.go
@@ -24,14 +24,64 @@ var (
 
 func init() {
 	lib.RegisterInputConfigCreator(TypeGeoLite2ASNCSVIn, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
-		return newGeoLite2ASNCSVIn(action, data)
+		return NewGeoLite2ASNCSVInFromBytes(action, data)
 	})
-	lib.RegisterInputConverter(TypeGeoLite2ASNCSVIn, &GeoLite2ASNCSVIn{
+	lib.RegisterInputConverter(TypeGeoLite2ASNCSVIn, &geoLite2ASNCSVIn{
 		Description: DescGeoLite2ASNCSVIn,
 	})
 }
 
-func newGeoLite2ASNCSVIn(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
+type geoLite2ASNCSVIn struct {
+	Type        string
+	Action      lib.Action
+	Description string
+	IPv4File    string
+	IPv6File    string
+	Want        map[string][]string
+	OnlyIPType  lib.IPType
+}
+
+func NewGeoLite2ASNCSVIn(action lib.Action, opts ...lib.InputOption) lib.InputConverter {
+	g := &geoLite2ASNCSVIn{
+		Type:        TypeGeoLite2ASNCSVIn,
+		Action:      action,
+		Description: DescGeoLite2ASNCSVIn,
+	}
+
+	for _, opt := range opts {
+		if opt != nil {
+			opt(g)
+		}
+	}
+
+	return g
+}
+
+func WithASNIPv4File(file string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2ASNCSVIn).IPv4File = strings.TrimSpace(file)
+	}
+}
+
+func WithASNIPv6File(file string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2ASNCSVIn).IPv6File = strings.TrimSpace(file)
+	}
+}
+
+func WithASNWantedList(wantList map[string][]string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2ASNCSVIn).Want = wantList
+	}
+}
+
+func WithASNOnlyIPType(onlyIPType lib.IPType) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2ASNCSVIn).OnlyIPType = onlyIPType
+	}
+}
+
+func NewGeoLite2ASNCSVInFromBytes(action lib.Action, data []byte) (lib.InputConverter, error) {
 	var tmp struct {
 		IPv4File   string                 `json:"ipv4"`
 		IPv6File   string                 `json:"ipv6"`
@@ -85,40 +135,28 @@ func newGeoLite2ASNCSVIn(action lib.Action, data json.RawMessage) (lib.InputConv
 		wantList[asn] = []string{"AS" + asn}
 	}
 
-	return &GeoLite2ASNCSVIn{
-		Type:        TypeGeoLite2ASNCSVIn,
-		Action:      action,
-		Description: DescGeoLite2ASNCSVIn,
-		IPv4File:    tmp.IPv4File,
-		IPv6File:    tmp.IPv6File,
-		Want:        wantList,
-		OnlyIPType:  tmp.OnlyIPType,
-	}, nil
-}
-
-type GeoLite2ASNCSVIn struct {
-	Type        string
-	Action      lib.Action
-	Description string
-	IPv4File    string
-	IPv6File    string
-	Want        map[string][]string
-	OnlyIPType  lib.IPType
+	return NewGeoLite2ASNCSVIn(
+		action,
+		WithASNIPv4File(tmp.IPv4File),
+		WithASNIPv6File(tmp.IPv6File),
+		WithASNWantedList(wantList),
+		WithASNOnlyIPType(tmp.OnlyIPType),
+	), nil
 }
 
-func (g *GeoLite2ASNCSVIn) GetType() string {
+func (g *geoLite2ASNCSVIn) GetType() string {
 	return g.Type
 }
 
-func (g *GeoLite2ASNCSVIn) GetAction() lib.Action {
+func (g *geoLite2ASNCSVIn) GetAction() lib.Action {
 	return g.Action
 }
 
-func (g *GeoLite2ASNCSVIn) GetDescription() string {
+func (g *geoLite2ASNCSVIn) GetDescription() string {
 	return g.Description
 }
 
-func (g *GeoLite2ASNCSVIn) Input(container lib.Container) (lib.Container, error) {
+func (g *geoLite2ASNCSVIn) Input(container lib.Container) (lib.Container, error) {
 	entries := make(map[string]*lib.Entry)
 
 	if g.IPv4File != "" {
@@ -157,7 +195,7 @@ func (g *GeoLite2ASNCSVIn) Input(container lib.Container) (lib.Container, error)
 	return container, nil
 }
 
-func (g *GeoLite2ASNCSVIn) process(file string, entries map[string]*lib.Entry) error {
+func (g *geoLite2ASNCSVIn) process(file string, entries map[string]*lib.Entry) error {
 	if entries == nil {
 		entries = make(map[string]*lib.Entry)
 	}
diff --git a/plugin/maxmind/maxmind_country_csv_in.go b/plugin/maxmind/maxmind_country_csv_in.go
index 93d38c37..6b5ba25f 100644
--- a/plugin/maxmind/maxmind_country_csv_in.go
+++ b/plugin/maxmind/maxmind_country_csv_in.go
@@ -25,14 +25,83 @@ var (
 
 func init() {
 	lib.RegisterInputConfigCreator(TypeGeoLite2CountryCSVIn, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
-		return newGeoLite2CountryCSVIn(action, data)
+		return NewGeoLite2CountryCSVInFromBytes(action, data)
 	})
-	lib.RegisterInputConverter(TypeGeoLite2CountryCSVIn, &GeoLite2CountryCSVIn{
+	lib.RegisterInputConverter(TypeGeoLite2CountryCSVIn, &geoLite2CountryCSVIn{
 		Description: DescGeoLite2CountryCSVIn,
 	})
 }
 
-func newGeoLite2CountryCSVIn(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
+type geoLite2CountryCSVIn struct {
+	Type            string
+	Action          lib.Action
+	Description     string
+	CountryCodeFile string
+	IPv4File        string
+	IPv6File        string
+	Want            map[string]bool
+	OnlyIPType      lib.IPType
+}
+
+func NewGeoLite2CountryCSVIn(action lib.Action, opts ...lib.InputOption) lib.InputConverter {
+	g := &geoLite2CountryCSVIn{
+		Type:        TypeGeoLite2CountryCSVIn,
+		Action:      action,
+		Description: DescGeoLite2CountryCSVIn,
+	}
+
+	for _, opt := range opts {
+		if opt != nil {
+			opt(g)
+		}
+	}
+
+	return g
+}
+
+func WithCountryCodeFile(file string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		file = strings.TrimSpace(file)
+		if file == "" {
+			file = defaultGeoLite2CountryCodeFile
+		}
+
+		g.(*geoLite2CountryCSVIn).CountryCodeFile = file
+	}
+}
+
+func WithCountryIPv4File(file string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2CountryCSVIn).IPv4File = strings.TrimSpace(file)
+	}
+}
+
+func WithCountryIPv6File(file string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2CountryCSVIn).IPv6File = strings.TrimSpace(file)
+	}
+}
+
+func WithCountryWantedList(lists []string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		wantList := make(map[string]bool)
+		for _, want := range lists {
+			if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
+				wantList[want] = true
+			}
+		}
+
+		g.(*geoLite2CountryCSVIn).Want = wantList
+	}
+}
+
+func WithCountryOnlyIPType(onlyIPType lib.IPType) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2CountryCSVIn).OnlyIPType = onlyIPType
+	}
+}
+
+func NewGeoLite2CountryCSVInFromBytes(action lib.Action, data []byte) (lib.InputConverter, error) {
 	var tmp struct {
 		CountryCodeFile string     `json:"country"`
 		IPv4File        string     `json:"ipv4"`
@@ -47,10 +116,6 @@ func newGeoLite2CountryCSVIn(action lib.Action, data json.RawMessage) (lib.Input
 		}
 	}
 
-	if tmp.CountryCodeFile == "" {
-		tmp.CountryCodeFile = defaultGeoLite2CountryCodeFile
-	}
-
 	// When both of IP files are not specified,
 	// it means user wants to use the default ones
 	if tmp.IPv4File == "" && tmp.IPv6File == "" {
@@ -58,50 +123,29 @@ func newGeoLite2CountryCSVIn(action lib.Action, data json.RawMessage) (lib.Input
 		tmp.IPv6File = defaultGeoLite2CountryIPv6File
 	}
 
-	// Filter want list
-	wantList := make(map[string]bool)
-	for _, want := range tmp.Want {
-		if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
-			wantList[want] = true
-		}
-	}
-
-	return &GeoLite2CountryCSVIn{
-		Type:            TypeGeoLite2CountryCSVIn,
-		Action:          action,
-		Description:     DescGeoLite2CountryCSVIn,
-		CountryCodeFile: tmp.CountryCodeFile,
-		IPv4File:        tmp.IPv4File,
-		IPv6File:        tmp.IPv6File,
-		Want:            wantList,
-		OnlyIPType:      tmp.OnlyIPType,
-	}, nil
-}
-
-type GeoLite2CountryCSVIn struct {
-	Type            string
-	Action          lib.Action
-	Description     string
-	CountryCodeFile string
-	IPv4File        string
-	IPv6File        string
-	Want            map[string]bool
-	OnlyIPType      lib.IPType
+	return NewGeoLite2CountryCSVIn(
+		action,
+		WithCountryCodeFile(tmp.CountryCodeFile),
+		WithCountryIPv4File(tmp.IPv4File),
+		WithCountryIPv6File(tmp.IPv6File),
+		WithCountryWantedList(tmp.Want),
+		WithCountryOnlyIPType(tmp.OnlyIPType),
+	), nil
 }
 
-func (g *GeoLite2CountryCSVIn) GetType() string {
+func (g *geoLite2CountryCSVIn) GetType() string {
 	return g.Type
 }
 
-func (g *GeoLite2CountryCSVIn) GetAction() lib.Action {
+func (g *geoLite2CountryCSVIn) GetAction() lib.Action {
 	return g.Action
 }
 
-func (g *GeoLite2CountryCSVIn) GetDescription() string {
+func (g *geoLite2CountryCSVIn) GetDescription() string {
 	return g.Description
 }
 
-func (g *GeoLite2CountryCSVIn) Input(container lib.Container) (lib.Container, error) {
+func (g *geoLite2CountryCSVIn) Input(container lib.Container) (lib.Container, error) {
 	ccMap, err := g.getCountryCode()
 	if err != nil {
 		return nil, err
@@ -145,7 +189,7 @@ func (g *GeoLite2CountryCSVIn) Input(container lib.Container) (lib.Container, er
 	return container, nil
 }
 
-func (g *GeoLite2CountryCSVIn) getCountryCode() (map[string]string, error) {
+func (g *geoLite2CountryCSVIn) getCountryCode() (map[string]string, error) {
 	var f io.ReadCloser
 	var err error
 	switch {
@@ -192,7 +236,7 @@ func (g *GeoLite2CountryCSVIn) getCountryCode() (map[string]string, error) {
 	return ccMap, nil
 }
 
-func (g *GeoLite2CountryCSVIn) process(file string, ccMap map[string]string, entries map[string]*lib.Entry) error {
+func (g *geoLite2CountryCSVIn) process(file string, ccMap map[string]string, entries map[string]*lib.Entry) error {
 	if len(ccMap) == 0 {
 		return fmt.Errorf("❌ [type %s | action %s] invalid country code data", g.Type, g.Action)
 	}
diff --git a/plugin/maxmind/maxmind_country_mmdb_in.go b/plugin/maxmind/maxmind_country_mmdb_in.go
index 1f6d5386..c3eed5fc 100644
--- a/plugin/maxmind/maxmind_country_mmdb_in.go
+++ b/plugin/maxmind/maxmind_country_mmdb_in.go
@@ -18,14 +18,14 @@ const (
 
 func init() {
 	lib.RegisterInputConfigCreator(TypeGeoLite2CountryMMDBIn, func(action lib.Action, data json.RawMessage) (lib.InputConverter, error) {
-		return newGeoLite2CountryMMDBIn(TypeGeoLite2CountryMMDBIn, DescGeoLite2CountryMMDBIn, action, data)
+		return NewGeoLite2CountryMMDBInFromBytes(TypeGeoLite2CountryMMDBIn, DescGeoLite2CountryMMDBIn, action, data)
 	})
-	lib.RegisterInputConverter(TypeGeoLite2CountryMMDBIn, &GeoLite2CountryMMDBIn{
+	lib.RegisterInputConverter(TypeGeoLite2CountryMMDBIn, &geoLite2CountryMMDBIn{
 		Description: DescGeoLite2CountryMMDBIn,
 	})
 }
 
-type GeoLite2CountryMMDBIn struct {
+type geoLite2CountryMMDBIn struct {
 	Type        string
 	Action      lib.Action
 	Description string
@@ -34,19 +34,60 @@ type GeoLite2CountryMMDBIn struct {
 	OnlyIPType  lib.IPType
 }
 
-func (g *GeoLite2CountryMMDBIn) GetType() string {
+func NewGeoLite2CountryMMDBIn(iType string, iDesc string, action lib.Action, opts ...lib.InputOption) lib.InputConverter {
+	g := &geoLite2CountryMMDBIn{
+		Type:        iType,
+		Action:      action,
+		Description: iDesc,
+	}
+
+	for _, opt := range opts {
+		if opt != nil {
+			opt(g)
+		}
+	}
+
+	return g
+}
+
+func WithURI(uri string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2CountryMMDBIn).URI = strings.TrimSpace(uri)
+	}
+}
+
+func WithInputWantedList(lists []string) lib.InputOption {
+	return func(g lib.InputConverter) {
+		wantList := make(map[string]bool)
+		for _, want := range lists {
+			if want = strings.ToUpper(strings.TrimSpace(want)); want != "" {
+				wantList[want] = true
+			}
+		}
+
+		g.(*geoLite2CountryMMDBIn).Want = wantList
+	}
+}
+
+func WithInputOnlyIPType(onlyIPType lib.IPType) lib.InputOption {
+	return func(g lib.InputConverter) {
+		g.(*geoLite2CountryMMDBIn).OnlyIPType = onlyIPType
+	}
+}
+
+func (g *geoLite2CountryMMDBIn) GetType() string {
 	return g.Type
 }
 
-func (g *GeoLite2CountryMMDBIn) GetAction() lib.Action {
+func (g *geoLite2CountryMMDBIn) GetAction() lib.Action {
 	return g.Action
 }
 
-func (g *GeoLite2CountryMMDBIn) GetDescription() string {
+func (g *geoLite2CountryMMDBIn) GetDescription() string {
 	return g.Description
 }
 
-func (g *GeoLite2CountryMMDBIn) Input(container lib.Container) (lib.Container, error) {
+func (g *geoLite2CountryMMDBIn) Input(container lib.Container) (lib.Container, error) {
 	var content []byte
 	var err error
 	switch {
@@ -89,7 +130,7 @@ func (g *GeoLite2CountryMMDBIn) Input(container lib.Container) (lib.Container, e
 	return container, nil
 }
 
-func (g *GeoLite2CountryMMDBIn) generateEntries(content []byte, entries map[string]*lib.Entry) error {
+func (g *geoLite2CountryMMDBIn) generateEntries(content []byte, entries map[string]*lib.Entry) error {
 	db, err := maxminddb.OpenBytes(content)
 	if err != nil {
 		return err
diff --git a/plugin/maxmind/maxmind_country_mmdb_out.go b/plugin/maxmind/maxmind_country_mmdb_out.go
index fc72e83c..e3613932 100644
--- a/plugin/maxmind/maxmind_country_mmdb_out.go
+++ b/plugin/maxmind/maxmind_country_mmdb_out.go
@@ -22,14 +22,14 @@ const (
 
 func init() {
 	lib.RegisterOutputConfigCreator(TypeGeoLite2CountryMMDBOut, func(action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
-		return newGeoLite2CountryMMDBOut(TypeGeoLite2CountryMMDBOut, DescGeoLite2CountryMMDBOut, action, data)
+		return NewGeoLite2CountryMMDBOutFromBytes(TypeGeoLite2CountryMMDBOut, DescGeoLite2CountryMMDBOut, action, data)
 	})
-	lib.RegisterOutputConverter(TypeGeoLite2CountryMMDBOut, &GeoLite2CountryMMDBOut{
+	lib.RegisterOutputConverter(TypeGeoLite2CountryMMDBOut, &geoLite2CountryMMDBOut{
 		Description: DescGeoLite2CountryMMDBOut,
 	})
 }
 
-type GeoLite2CountryMMDBOut struct {
+type geoLite2CountryMMDBOut struct {
 	Type        string
 	Action      lib.Action
 	Description string
@@ -43,19 +43,94 @@ type GeoLite2CountryMMDBOut struct {
 	SourceMMDBURI string
 }
 
-func (g *GeoLite2CountryMMDBOut) GetType() string {
+func NewGeoLite2CountryMMDBOut(iType string, iDesc string, action lib.Action, opts ...lib.OutputOption) lib.OutputConverter {
+	g := &geoLite2CountryMMDBOut{
+		Type:        iType,
+		Action:      action,
+		Description: iDesc,
+	}
+
+	for _, opt := range opts {
+		if opt != nil {
+			opt(g)
+		}
+	}
+
+	return g
+}
+
+func WithOutputName(name string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		name = strings.TrimSpace(name)
+		if name == "" {
+			name = defaultGeoLite2CountryMMDBOutputName
+		}
+
+		g.(*geoLite2CountryMMDBOut).OutputName = name
+	}
+}
+
+func WithOutputDir(dir string, iType string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		dir = strings.TrimSpace(dir)
+		if dir == "" {
+			switch iType {
+			case TypeGeoLite2CountryMMDBOut:
+				dir = defaultMaxmindOutputDir
+			case TypeDBIPCountryMMDBOut:
+				dir = defaultDBIPOutputDir
+			case TypeIPInfoCountryMMDBOut:
+				dir = defaultIPInfoOutputDir
+			}
+		}
+
+		g.(*geoLite2CountryMMDBOut).OutputDir = dir
+	}
+}
+
+func WithOutputWantedList(lists []string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		g.(*geoLite2CountryMMDBOut).Want = lists
+	}
+}
+
+func WithOutputOverwriteList(lists []string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		g.(*geoLite2CountryMMDBOut).Overwrite = lists
+	}
+}
+
+func WithOutputExcludedList(lists []string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		g.(*geoLite2CountryMMDBOut).Exclude = lists
+	}
+}
+
+func WithOutputOnlyIPType(onlyIPType lib.IPType) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		g.(*geoLite2CountryMMDBOut).OnlyIPType = onlyIPType
+	}
+}
+
+func WithSourceMMDBURI(uri string) lib.OutputOption {
+	return func(g lib.OutputConverter) {
+		g.(*geoLite2CountryMMDBOut).SourceMMDBURI = uri
+	}
+}
+
+func (g *geoLite2CountryMMDBOut) GetType() string {
 	return g.Type
 }
 
-func (g *GeoLite2CountryMMDBOut) GetAction() lib.Action {
+func (g *geoLite2CountryMMDBOut) GetAction() lib.Action {
 	return g.Action
 }
 
-func (g *GeoLite2CountryMMDBOut) GetDescription() string {
+func (g *geoLite2CountryMMDBOut) GetDescription() string {
 	return g.Description
 }
 
-func (g *GeoLite2CountryMMDBOut) Output(container lib.Container) error {
+func (g *geoLite2CountryMMDBOut) Output(container lib.Container) error {
 	dbName := ""
 	dbDesc := ""
 	dbLanguages := []string{"en"}
@@ -119,7 +194,7 @@ func (g *GeoLite2CountryMMDBOut) Output(container lib.Container) error {
 	return nil
 }
 
-func (g *GeoLite2CountryMMDBOut) filterAndSortList(container lib.Container) []string {
+func (g *geoLite2CountryMMDBOut) filterAndSortList(container lib.Container) []string {
 	/*
 		Note: The IPs and/or CIDRs of the latter list will overwrite those of the former one
 		when duplicated data found due to MaxMind mmdb file format constraint.
@@ -175,7 +250,7 @@ func (g *GeoLite2CountryMMDBOut) filterAndSortList(container lib.Container) []st
 	return list
 }
 
-func (g *GeoLite2CountryMMDBOut) marshalData(writer *mmdbwriter.Tree, entry *lib.Entry, extraInfo map[string]any) error {
+func (g *geoLite2CountryMMDBOut) marshalData(writer *mmdbwriter.Tree, entry *lib.Entry, extraInfo map[string]any) error {
 	entryCidr, err := entry.MarshalText(lib.GetIgnoreIPType(g.OnlyIPType))
 	if err != nil {
 		return err
@@ -371,7 +446,7 @@ func (g *GeoLite2CountryMMDBOut) marshalData(writer *mmdbwriter.Tree, entry *lib
 	return nil
 }
 
-func (g *GeoLite2CountryMMDBOut) writeFile(filename string, writer *mmdbwriter.Tree) error {
+func (g *geoLite2CountryMMDBOut) writeFile(filename string, writer *mmdbwriter.Tree) error {
 	if err := os.MkdirAll(g.OutputDir, 0755); err != nil {
 		return err
 	}