packets upgrade

proto_base/base_types.go

@@ -4,6 +4,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
+	"reflect"
 )
 
 type Direction int
@@ -210,3 +211,12 @@ type EncodeDecodeAble interface {
 	Encode(w io.Writer) (err error)
 	Decode(r io.Reader) (err error)
 }
+
+type PacketInfo struct {
+	Type            reflect.Type
+	Name            string
+	Direction       Direction
+	State           State
+	PacketId        int
+	ProtocolVersion int
+}

proto_generated/version_switcher.go

@@ -1,37 +0,0 @@
-package proto_generated
-
-import (
-	"github.com/admin-else/strom/proto_base"
-	"github.com/admin-else/strom/proto_generated/v1_21_8"
-	"io"
-)
-
-func PacketIdentifierToType(v string, d proto_base.Direction, s proto_base.State, i string) (t any) {
-	switch v {
-	case "1.21.8":
-		t = v1_21_8.PacketIdentifierToType(d, s, i)
-	default:
-	}
-	return
-}
-func TypeToPacketIdentifier(v string, d proto_base.Direction, s proto_base.State, t any) (i string) {
-	switch v {
-	case "1.21.8":
-		i = v1_21_8.TypeToPacketIdentifier(d, s, t)
-	}
-	return
-}
-func DecodePacket(v string, d proto_base.Direction, s proto_base.State, r io.Reader) (packet any, err error) {
-	switch v {
-	case "1.21.8":
-		packet, err = v1_21_8.DecodePacket(d, s, r)
-	}
-	return
-}
-func EncodePacket(v string, d proto_base.Direction, s proto_base.State, i string, p any, w io.Writer) (err error) {
-	switch v {
-	case "1.21.8":
-		err = v1_21_8.EncodePacket(d, s, i, p, w)
-	}
-	return
-}

proto_generator/helper_append.txt

@@ -1,178 +0,0 @@
-
-func TypeToPacketIdentifier(d proto_base.Direction, s proto_base.State, t any) (i string) {
-	switch d {
-	case proto_base.ToServer:
-		switch s {
-		case proto_base.Handshaking:
-			i = HandshakingToServerTypeToPacketIdentifier(t)
-		case proto_base.Status:
-			i = StatusToServerTypeToPacketIdentifier(t)
-		case proto_base.Login:
-			i = LoginToServerTypeToPacketIdentifier(t)
-		case proto_base.Configuration:
-			i = ConfigurationToServerTypeToPacketIdentifier(t)
-		case proto_base.Play:
-			i = PlayToServerTypeToPacketIdentifier(t)
-		}
-	case proto_base.ToClient:
-		switch s {
-		case proto_base.Handshaking:
-			i = HandshakingToClientTypeToPacketIdentifier(t)
-		case proto_base.Status:
-			i = StatusToClientTypeToPacketIdentifier(t)
-		case proto_base.Login:
-			i = LoginToClientTypeToPacketIdentifier(t)
-		case proto_base.Configuration:
-			i = ConfigurationToClientTypeToPacketIdentifier(t)
-		case proto_base.Play:
-			i = PlayToClientTypeToPacketIdentifier(t)
-		}
-	}
-	return
-}
-
-func PacketIdentifierToType(d proto_base.Direction, s proto_base.State, i string) (t any) {
-	switch d {
-	case proto_base.ToServer:
-		switch s {
-		case proto_base.Handshaking:
-			t = HandshakingToServerPacketIdentifierToType(i)
-		case proto_base.Status:
-			t = StatusToServerPacketIdentifierToType(i)
-		case proto_base.Login:
-			t = LoginToServerPacketIdentifierToType(i)
-		case proto_base.Configuration:
-			t = ConfigurationToServerPacketIdentifierToType(i)
-		case proto_base.Play:
-			t = PlayToServerPacketIdentifierToType(i)
-		}
-	case proto_base.ToClient:
-		switch s {
-		case proto_base.Handshaking:
-			t = HandshakingToClientPacketIdentifierToType(i)
-		case proto_base.Status:
-			t = StatusToClientPacketIdentifierToType(i)
-		case proto_base.Login:
-			t = LoginToClientPacketIdentifierToType(i)
-		case proto_base.Configuration:
-			t = ConfigurationToClientPacketIdentifierToType(i)
-		case proto_base.Play:
-			t = PlayToClientPacketIdentifierToType(i)
-		}
-	}
-	return
-}
-
-func DecodePacket(d proto_base.Direction, s proto_base.State, r io.Reader) (params any, err error) {
-	switch d {
-	case proto_base.ToServer:
-		switch s {
-		case proto_base.Handshaking:
-			var packet HandshakingToServerPacket
-			packet, err = HandshakingToServerPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Status:
-			var packet StatusToServerPacket
-			packet, err = StatusToServerPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Login:
-			var packet LoginToServerPacket
-			packet, err = LoginToServerPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Configuration:
-			var packet ConfigurationToServerPacket
-			packet, err = ConfigurationToServerPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Play:
-			var packet PlayToServerPacket
-			packet, err = PlayToServerPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		}
-	case proto_base.ToClient:
-		switch s {
-		case proto_base.Handshaking:
-			var packet HandshakingToClientPacket
-			packet, err = HandshakingToClientPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Status:
-			var packet StatusToClientPacket
-			packet, err = StatusToClientPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Login:
-			var packet LoginToClientPacket
-			packet, err = LoginToClientPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Configuration:
-			var packet ConfigurationToClientPacket
-			packet, err = ConfigurationToClientPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		case proto_base.Play:
-			var packet PlayToClientPacket
-			packet, err = PlayToClientPacket{}.Decode(r)
-			if err != nil {
-				return
-			}
-			params = packet.Params
-		}
-	}
-	return
-}
-
-func EncodePacket(d proto_base.Direction, s proto_base.State, i string, p any, w io.Writer) (err error) {
-	switch d {
-	case proto_base.ToServer:
-		switch s {
-		case proto_base.Handshaking:
-			err = HandshakingToServerPacket{i, p}.Encode(w)
-		case proto_base.Status:
-			err = StatusToServerPacket{i, p}.Encode(w)
-		case proto_base.Login:
-			err = LoginToServerPacket{i, p}.Encode(w)
-		case proto_base.Configuration:
-			err = ConfigurationToServerPacket{i, p}.Encode(w)
-		case proto_base.Play:
-			err = PlayToServerPacket{i, p}.Encode(w)
-		}
-	case proto_base.ToClient:
-		switch s {
-		case proto_base.Handshaking:
-			err = HandshakingToClientPacket{i, p}.Encode(w)
-		case proto_base.Status:
-			err = StatusToClientPacket{i, p}.Encode(w)
-		case proto_base.Login:
-			err = LoginToClientPacket{i, p}.Encode(w)
-		case proto_base.Configuration:
-			err = ConfigurationToClientPacket{i, p}.Encode(w)
-		case proto_base.Play:
-			err = PlayToClientPacket{i, p}.Encode(w)
-		}
-	}
-	return
-}

proto_generator/helper_generator.go

@@ -2,128 +2,128 @@ package main
 
 import (
 	"go/ast"
-	"io"
+	"os"
+	"strconv"
 	"strings"
 
-	_ "embed"
-
 	"github.com/admin-else/strom/data"
 )
 
-//go:embed helper_append.txt
-var helperAppend string
-
-func GenerateHelperTypes(t Types, prefix string, f *ast.File) (err error) {
-	for k, v := range t.Types {
-		if k != "packet" {
-			continue
-		}
-		v := v.([]any)[1].([]any)[1].(map[string]any)["type"].([]any)[1].(map[string]any)["fields"].(map[string]any)
-		m := make(map[string]string)
-		for k2, v2 := range v {
-			v2 := v2.(string)
-			if strings.HasPrefix(v2, "packet_common") {
-				m[k2] = CamelCase(v2)
-			} else if v2 == "void" {
-				m[k2] = "proto_base.Void"
-			} else {
-				m[k2] = prefix + CamelCase(v2)
-			}
-		}
-		err = PacketIdentifierToTypeGenerator(prefix, f, m)
-		if err != nil {
-			return
-		}
-		m = ReverseMap(m)
-		err = TypeToPacketIdentifierGenerator(prefix, f, m)
-		if err != nil {
-			return
-		}
-	}
-	return
+type TypesInfo struct {
+	Types
+	Direction string
+	State     string
 }
 
-func GenerateHelperState(s State, prefix string, f *ast.File) (err error) {
-	err = GenerateHelperTypes(s.ToServer, prefix+"ToServer", f)
-	if err != nil {
-		return
-	}
-	return GenerateHelperTypes(s.ToClient, prefix+"ToClient", f)
+type PacketInfo struct {
+	TName, Name, Direction, State, PacketId, ProtocolVersion, MinecraftVersion string
 }
 
-func GenerateHelperProtocol(p Protocol, f *ast.File) (err error) {
-	err = GenerateHelperState(p.Handshaking, "Handshaking", f)
+func CollectPacketInfo(versions []string) (packetInfos []PacketInfo, err error) {
+	var versionData data.ProtocolVersion
+	for _, version := range versions {
+		versionData, err = data.LookUpProtocolVersionByName(version)
 		if err != nil {
 			return
 		}
-	err = GenerateHelperState(p.Status, "Status", f)
-	if err != nil {
-		return
-	}
-	err = GenerateHelperState(p.Login, "Login", f)
-	if err != nil {
-		return
-	}
-	err = GenerateHelperState(p.Configuration, "Configuration", f)
-	if err != nil {
-		return
-	}
-	err = GenerateHelperState(p.Play, "Play", f)
-	if err != nil {
-		return
-	}
-	return
-}
-
-//	PacketIdentifierToTypeGenerator func PacketIdentifierToType(s string) any {
-//		switch s {
-//		case "abilities":
-//			return PlayToClientPacketAbilities{}
-//		default:
-//			return nil
-//		}
-//	}
-func PacketIdentifierToTypeGenerator(funcNamePrefix string, f *ast.File, m map[string]string) (err error) {
-	var s []ast.Stmt
-	for _, k := range OrderedKeys(m) {
-		v := m[k]
-		s = append(s, Case(Exprs(StrLit(k)), Stmts(Assign121(Ident("t"), CompLit(Ident(v), nil)))))
-	}
-	s = append(s, Case(nil, Stmts(Assign121(Ident("t"), Nil()))))
-	fn := NewFunc(funcNamePrefix+"PacketIdentifierToType", []NameAndType{{"s", Ident("string")}}, []NameAndType{{"t", Ident("any")}})
-	fn.Body = NewBlockEllipsis(SwitchStmt(Ident("s"), NewBlock(s)), Return())
-	AppendDecl(f, fn)
-	return
-}
-
-func TypeToPacketIdentifierGenerator(funcNamePrefix string, f *ast.File, m map[string]string) (err error) {
-	var s []ast.Stmt
-	for _, k := range OrderedKeys(m) {
-		v := m[k]
-		s = append(s, Case(Exprs(Ident(k)), Stmts(Assign121(Ident("s"), StrLit(v)))))
-	}
-	fn := NewFunc(funcNamePrefix+"TypeToPacketIdentifier", []NameAndType{{"t", Ident("any")}}, []NameAndType{{"s", Ident("string")}})
-	fn.Body = NewBlockEllipsis(TypeSwitch(ExprStmt(TypeAssert(Ident("t"), Ident("type"))), NewBlock(s)), Return())
-	AppendDecl(f, fn)
-	return
-}
-
-func GenerateHelpers(version string, w io.Writer) (err error) {
 		protocol := Protocol{}
 		err = data.LoadVersionedJson(version, "protocol", &protocol)
 		if err != nil {
 			return
 		}
-	f := NewFile("v" + strings.ReplaceAll(version, ".", "_"))
-	AppendDecl(f, Import("io", "github.com/admin-else/strom/proto_base"))
-	err = GenerateHelperProtocol(protocol, f)
-	if err != nil {
-		return
+		prefixTypeMap := map[string]TypesInfo{
+			"HandshakingToServer":   {protocol.Handshaking.ToServer, "ToServer", "Handshaking"},
+			"HandshakingToClient":   {protocol.Handshaking.ToClient, "ToClient", "Handshaking"},
+			"StatusToServer":        {protocol.Status.ToServer, "ToServer", "Status"},
+			"StatusToClient":        {protocol.Status.ToClient, "ToClient", "Status"},
+			"LoginToServer":         {protocol.Login.ToServer, "ToServer", "Login"},
+			"LoginToClient":         {protocol.Login.ToClient, "ToClient", "Login"},
+			"ConfigurationToServer": {protocol.Configuration.ToServer, "ToServer", "Configuration"},
+			"ConfigurationToClient": {protocol.Configuration.ToClient, "ToClient", "Configuration"},
+			"PlayToServer":          {protocol.Play.ToServer, "ToServer", "Play"},
+			"PlayToClient":          {protocol.Play.ToClient, "ToClient", "Play"},
+		}
+		for prefix, types := range prefixTypeMap {
+			for k, v := range types.Types.Types {
+				if k != "packet" {
+					continue
+				}
+				packetIds := v.([]any)[1].([]any)[0].(map[string]any)["type"].([]any)[1].(map[string]any)["mappings"].(map[string]any)
+				packetIdsStrings := AssertAndConvertMapValues[string](packetIds)
+				packetIdsRev := ReverseMap(packetIdsStrings)
+				v := v.([]any)[1].([]any)[1].(map[string]any)["type"].([]any)[1].(map[string]any)["fields"].(map[string]any)
+				for k2, v2 := range v {
+					v2 := v2.(string)
+					var typeName string
+					if strings.HasPrefix(v2, "packet_common") {
+						typeName = CamelCase(v2)
+					} else if v2 == "void" {
+						typeName = "struct{}"
+					} else {
+						typeName = prefix + CamelCase(v2)
+					}
+					packetInfos = append(packetInfos, PacketInfo{
+						TName:            typeName,
+						Name:             k2,
+						Direction:        types.Direction,
+						State:            types.State,
+						PacketId:         packetIdsRev[k2],
+						ProtocolVersion:  strconv.Itoa(versionData.Version),
+						MinecraftVersion: version,
+					})
+				}
+			}
 		}
-	err = PrintToFile(f, w)
-	if err != nil {
-		return
 	}
-	_, err = w.Write([]byte(helperAppend))
 	return
 }
+
+func GeneratePacketInfoFile(versions []string) (err error) {
+	var packetInfos []PacketInfo
+	packetInfos, err = CollectPacketInfo(versions)
+	if err != nil {
+		return
+	}
+
+	f := NewFile("proto_generated")
+	imports := []string{"reflect", "github.com/admin-else/strom/proto_base"}
+	for _, v := range versions {
+		vUnderscore := strings.ReplaceAll(v, ".", "_")
+		imports = append(imports, "github.com/admin-else/strom/proto_generated/v"+vUnderscore)
+	}
+	AppendDecl(f, Import(imports...))
+
+	var packetInfoExprs []ast.Expr
+	for _, p := range packetInfos {
+		vUnderscore := "v" + strings.ReplaceAll(p.MinecraftVersion, ".", "_")
+		typeName := p.TName
+		var typeExpr ast.Expr
+		if typeName == "struct{}" {
+			typeExpr = &ast.StructType{Fields: &ast.FieldList{}}
+		} else if strings.HasPrefix(typeName, "proto_base.") {
+			typeExpr = Selector("proto_base", strings.TrimPrefix(typeName, "proto_base."))
+		} else {
+			typeExpr = Selector(vUnderscore, typeName)
+		}
+
+		packetId, _ := strconv.ParseInt(p.PacketId, 0, 32)
+		protocolVersion, _ := strconv.Atoi(p.ProtocolVersion)
+
+		packetInfoExprs = append(packetInfoExprs, CompLit(Selector("proto_base", "PacketInfo"), []ast.Expr{
+			KeyValueExpr(Ident("Type"), Call(Selector("reflect", "TypeOf"), CompLit(typeExpr, nil))),
+			KeyValueExpr(Ident("Name"), StrLit(p.Name)),
+			KeyValueExpr(Ident("Direction"), Selector("proto_base", p.Direction)),
+			KeyValueExpr(Ident("State"), Selector("proto_base", p.State)),
+			KeyValueExpr(Ident("PacketId"), NumLit(int(packetId))),
+			KeyValueExpr(Ident("ProtocolVersion"), NumLit(protocolVersion)),
+		}))
+	}
+	AppendDecl(f, VarValues("Packets", CompLit(Slice(Selector("proto_base", "PacketInfo")), packetInfoExprs)))
+	out, err := os.Create("proto_generated/packet_info.go")
+	if err != nil {
+		return
+	}
+	defer out.Close()
+
+	return PrintToFile(f, out)
+}

proto_generator/main.go

@@ -197,7 +197,7 @@ func FixPointerReceivers(e ast.Expr) (td ast.Expr, ret ast.Expr) {
 	return
 }
 
-func (g *Generator) GenerateTypes(prefix string, types Types) error {
+func (g *Generator) GenerateTypes(prefix string, types Types) (err error) {
 	g.CurrentlyGeneratingTypes = types
 	g.CurrentlyGeneratingTypesPrefix = prefix
 	for _, k := range OrderedKeys(types.Types) {
@@ -207,13 +207,13 @@ func (g *Generator) GenerateTypes(prefix string, types Types) error {
 		}
 
 		g.Depth = 0
-		e, err := g.VisitType(v)
-		if errors.Is(err, ToDoError) {
+		e, err2 := g.VisitType(v)
+		if errors.Is(err2, ToDoError) {
 			e = Selector("proto_base", "ToDo")
-			err = nil
+			err2 = nil
 		}
-		if err != nil {
-			return err
+		if err2 != nil {
+			return err2
 		}
 		if e == nil { // This is for types we implement ourselves
 			continue
@@ -229,11 +229,11 @@ func (g *Generator) GenerateTypes(prefix string, types Types) error {
 		rets := []NameAndType{{"err", Ident("error")}}
 		decodeFunction := NewFuncWithReceiver("Decode", "ret", Pointer(Ident(tName)), args, rets)
 		g.Depth = 0
-		s, err := g.VisitDecoder(retExpr, v, tName)
-		if err != nil {
+		s, err2 := g.VisitDecoder(retExpr, v, tName)
+		if err2 != nil {
 			s = ToDoStmts
-			if !errors.Is(err, ToDoError) {
-				fmt.Println("failed to make decoder for", k, err)
+			if !errors.Is(err2, ToDoError) {
+				fmt.Println("failed to make decoder for", k, err2)
 			}
 		}
 		decodeFunction.Body = NewBlock(append(s, Return()))
@@ -243,18 +243,18 @@ func (g *Generator) GenerateTypes(prefix string, types Types) error {
 		rets = []NameAndType{{"err", Ident("error")}}
 		encodeFunction := NewFuncWithReceiver("Encode", "ret", Pointer(Ident(tName)), args, rets)
 		g.Depth = 0
-		s, err = g.VisitEncoder(retExpr, v, tName)
-		if err != nil {
+		s, err2 = g.VisitEncoder(retExpr, v, tName)
+		if err2 != nil {
 			s = ToDoStmts
-			if !errors.Is(err, ToDoError) {
-				fmt.Println("failed to make encoder for", k, err)
+			if !errors.Is(err2, ToDoError) {
+				fmt.Println("failed to make encoder for", k, err2)
 			}
 		}
 		encodeFunction.Body = NewBlock(append(s, Return()))
 		AppendDecl(g.File, encodeFunction)
 
 	}
-	return nil
+	return
 }
 
 func (g *Generator) GenerateState(prefix string, state State) (err error) {
@@ -331,12 +331,6 @@ func generateVersion(v string) (err error) {
 	if err != nil {
 		return
 	}
-	helperF, err := os.Create("proto_generated/v" + vUnderscore + "/helpers.go")
-	if err != nil {
-		return
-	}
-	defer f.Close()
-	err = GenerateHelpers(v, helperF)
 	return
 }
 
@@ -349,12 +343,6 @@ func GenerateVersions(versions []string) (err error) {
 	if err != nil {
 		return
 	}
-	f, err := os.Create("proto_generated/version_switcher.go")
-	if err != nil {
-		return
-	}
-	defer f.Close()
-	err = GenerateVersionSwitcher(versions, f)
 	for _, version := range versions {
 		fmt.Println("generating", version)
 		err = generateVersion(version)
@@ -362,7 +350,7 @@ func GenerateVersions(versions []string) (err error) {
 			return
 		}
 	}
-	return
+	return GeneratePacketInfoFile(versions)
 }
 
 func main() {

proto_generator/printer.go

@@ -8,13 +8,12 @@ import (
 	"io"
 )
 
-func NewStruct() *ast.StructType {
+func NewStruct() (s *ast.StructType) {
 	return &ast.StructType{
 		Fields: &ast.FieldList{
 			List: []*ast.Field{},
 		},
 	}
-
 }
 
 func AddFieldToStruct(s *ast.StructType, fieldName string, t ast.Expr) {
@@ -48,7 +47,7 @@ func Import(path ...string) ast.Decl {
 	}
 }
 
-func Ident(name string) *ast.Ident {
+func Ident(name string) (id *ast.Ident) {
 	return ast.NewIdent(name)
 }
 
@@ -56,6 +55,18 @@ func VarStmt(name string, t ast.Expr) *ast.DeclStmt {
 	return &ast.DeclStmt{Decl: Var(name, t)}
 }
 
+func VarValues(name string, v ...ast.Expr) ast.Decl {
+	return &ast.GenDecl{
+		Tok: token.VAR,
+		Specs: []ast.Spec{
+			&ast.ValueSpec{
+				Names:  []*ast.Ident{Ident(name)},
+				Values: v,
+			},
+		},
+	}
+}
+
 func Var(name string, t ast.Expr) ast.Decl {
 	return &ast.GenDecl{
 		Tok: token.VAR,
@@ -72,7 +83,7 @@ func Var(name string, t ast.Expr) ast.Decl {
 	}
 }
 
-func Slice(elementType ast.Expr) ast.Expr {
+func Slice(elementType ast.Expr) (e ast.Expr) {
 	return &ast.ArrayType{
 		Len: nil, // nil Length means it's a slice, not an array
 		Elt: elementType,
@@ -116,34 +127,34 @@ func TypeDecl(name string, t ast.Expr) ast.Decl {
 	}
 }
 
-func Selector(x, sel string) ast.Expr {
+func Selector(x, sel string) (e ast.Expr) {
 	return &ast.SelectorExpr{
 		X:   Ident(x),
 		Sel: Ident(sel),
 	}
 }
 
-func SelectorExprAndStr(x ast.Expr, sel string) ast.Expr {
+func SelectorExprAndStr(x ast.Expr, sel string) (e ast.Expr) {
 	return &ast.SelectorExpr{
 		X:   x,
 		Sel: Ident(sel),
 	}
 }
 
-func Pointer(elementType ast.Expr) ast.Expr {
+func Pointer(elementType ast.Expr) (e ast.Expr) {
 	return &ast.StarExpr{
 		X: elementType,
 	}
 }
 
-func Call(fn ast.Expr, args ...ast.Expr) *ast.CallExpr {
+func Call(fn ast.Expr, args ...ast.Expr) (e *ast.CallExpr) {
 	return &ast.CallExpr{
 		Fun:  fn,
 		Args: args,
 	}
 }
 
-func Assign121(lhs, rhs ast.Expr) *ast.AssignStmt {
+func Assign121(lhs, rhs ast.Expr) (s *ast.AssignStmt) {
 	return &ast.AssignStmt{
 		Lhs: []ast.Expr{lhs},
 		Tok: token.ASSIGN,
@@ -151,7 +162,7 @@ func Assign121(lhs, rhs ast.Expr) *ast.AssignStmt {
 	}
 }
 
-func Assign(lhs, rhs []ast.Expr) *ast.AssignStmt {
+func Assign(lhs, rhs []ast.Expr) (s *ast.AssignStmt) {
 	return &ast.AssignStmt{
 		Lhs: lhs,
 		Tok: token.ASSIGN,
@@ -159,7 +170,7 @@ func Assign(lhs, rhs []ast.Expr) *ast.AssignStmt {
 	}
 }
 
-func Define(lhs, rhs []ast.Expr) *ast.AssignStmt {
+func Define(lhs, rhs []ast.Expr) (s *ast.AssignStmt) {
 	return &ast.AssignStmt{
 		Lhs: lhs,
 		Tok: token.DEFINE,
@@ -167,7 +178,7 @@ func Define(lhs, rhs []ast.Expr) *ast.AssignStmt {
 	}
 }
 
-func Define121(lhs, rhs ast.Expr) *ast.AssignStmt {
+func Define121(lhs, rhs ast.Expr) (s *ast.AssignStmt) {
 	return &ast.AssignStmt{
 		Lhs: []ast.Expr{lhs},
 		Tok: token.DEFINE,

proto_generator/utils.go

@@ -9,7 +9,8 @@ import (
 
 var boundaries = []rune{' ', '_', '-', '.', ',', ';', ':', '(', ')', '[', ']', '{', '}'}
 
-func CamelCase(s string) (ret string) {
+func CamelCase(s string) string {
+	ret := ""
 	atWordBoundary := true
 	for _, c := range s {
 		if slices.Contains(boundaries, c) {
@@ -22,7 +23,7 @@ func CamelCase(s string) (ret string) {
 		atWordBoundary = false
 		ret += string(c)
 	}
-	return
+	return ret
 }
 
 func OrderedKeys[Map map[K]V, K cmp.Ordered, V any](m Map) []K {
@@ -32,12 +33,20 @@ func OrderedKeys[Map map[K]V, K cmp.Ordered, V any](m Map) []K {
 	return keys
 }
 
-func ReverseMap[M map[K]V, K cmp.Ordered, V cmp.Ordered](m M) (ret map[V]K) {
-	ret = map[V]K{}
+func AssertAndConvertMapValues[T any, M map[K]any, K cmp.Ordered](m M) map[K]T {
+	ret := map[K]T{}
+	for k, v := range m {
+		ret[k] = v.(T)
+	}
+	return ret
+}
+
+func ReverseMap[M map[K]V, K cmp.Ordered, V cmp.Ordered](m M) map[V]K {
+	ret := map[V]K{}
 	for k, v := range m {
 		ret[v] = k
 	}
-	return
+	return ret
 }
 
 func must(err error) {
@@ -46,9 +55,10 @@ func must(err error) {
 	}
 }
 
-func PopFront[T any](s []T) (front T, rest []T, ok bool) {
+func PopFront[T any](s []T) (T, []T, bool) {
 	if len(s) == 0 {
-		return front, s, false
+		var zero T
+		return zero, s, false
 	}
 	return s[0], s[1:], true
 }

proto_generator/version_swticher.go

@@ -1,143 +0,0 @@
-package main
-
-import (
-	"go/ast"
-	"io"
-	"strings"
-)
-
-func GeneratePacketIdentifierToType(versions []string) (decl ast.Decl) {
-	var s []ast.Stmt
-	for _, version := range versions {
-		s = append(s, Case(Exprs(StrLit(version)), Stmts(
-			Assign121(Ident("t"), Call(SelectorExprAndStr(Ident("v"+strings.ReplaceAll(version, ".", "_")), "PacketIdentifierToType"), Ident("d"), Ident("s"), Ident("i"))),
-		)))
-	}
-	s = append(s, Case(nil, Stmts()))
-	fn := NewFunc("PacketIdentifierToType", []NameAndType{
-		{"v", Ident("string")},
-		{"d", Ident("proto_base.Direction")},
-		{"s", Ident("proto_base.State")},
-		{"i", Ident("string")},
-	}, []NameAndType{
-		{"t", Ident("any")},
-	})
-	fn.Body = NewBlockEllipsis(SwitchStmt(Ident("v"), NewBlock(s)), Return())
-	decl = fn
-	return
-}
-
-/*
-func PacketIdentifierToType(v string, d proto_base.Direction, s proto_base.State, i string) (t any) {
-	switch v {
-	case "1.21.8":
-		t = v1_21_8.PacketIdentifierToType(d, s, i)
-	default:
-
-	}
-	return
-}
-
-func TypeToPacketIdentifier(v string, d proto_base.Direction, s proto_base.State, t any) (i string) {
-	switch v {
-	case "1.21.8":
-		i = v1_21_8.TypeToPacketIdentifier(d, s, t)
-	}
-	return
-}
-
-func DecodePacket(v string, d proto_base.Direction, s proto_base.State, r io.Reader) (packet any, err error) {
-	switch v {
-	case "1.21.8":
-		packet, err = v1_21_8.DecodePacket(d, s, r)
-	}
-	return
-}
-
-func EncodePacket(v string, d proto_base.Direction, s proto_base.State, i string, p any, w io.Writer) (err error) {
-	switch v {
-	case "1.21.8":
-		err = v1_21_8.EncodePacket(d, s, i, p, w)
-
-	}
-	return
-}
-
-*/
-
-func GenerateTypeToPacketIdentifier(versions []string) (decl ast.Decl) {
-	var s []ast.Stmt
-	for _, version := range versions {
-		s = append(s, Case(Exprs(StrLit(version)), Stmts(
-			Assign121(Ident("i"), Call(SelectorExprAndStr(Ident("v"+strings.ReplaceAll(version, ".", "_")), "TypeToPacketIdentifier"), Ident("d"), Ident("s"), Ident("t"))),
-		)))
-	}
-	fn := NewFunc("TypeToPacketIdentifier", []NameAndType{
-		{"v", Ident("string")},
-		{"d", Ident("proto_base.Direction")},
-		{"s", Ident("proto_base.State")},
-		{"t", Ident("any")},
-	}, []NameAndType{
-		{"i", Ident("string")},
-	})
-	fn.Body = NewBlockEllipsis(SwitchStmt(Ident("v"), NewBlock(s)), Return())
-	decl = fn
-	return
-}
-
-func GenerateDecodePacket(versions []string) (decl ast.Decl) {
-	var s []ast.Stmt
-	for _, version := range versions {
-		s = append(s, Case(Exprs(StrLit(version)), Stmts(
-			Assign([]ast.Expr{Ident("packet"), Ident("err")}, []ast.Expr{Call(SelectorExprAndStr(Ident("v"+strings.ReplaceAll(version, ".", "_")), "DecodePacket"), Ident("d"), Ident("s"), Ident("r"))}),
-		)))
-	}
-	fn := NewFunc("DecodePacket", []NameAndType{
-		{"v", Ident("string")},
-		{"d", Ident("proto_base.Direction")},
-		{"s", Ident("proto_base.State")},
-		{"r", Ident("io.Reader")},
-	}, []NameAndType{
-		{"packet", Ident("any")},
-		{"err", Ident("error")},
-	})
-	fn.Body = NewBlockEllipsis(SwitchStmt(Ident("v"), NewBlock(s)), Return())
-	decl = fn
-	return
-}
-
-func GenerateEncodePacket(versions []string) (decl ast.Decl) {
-	var s []ast.Stmt
-	for _, version := range versions {
-		s = append(s, Case(Exprs(StrLit(version)), Stmts(
-			Assign121(Ident("err"), Call(SelectorExprAndStr(Ident("v"+strings.ReplaceAll(version, ".", "_")), "EncodePacket"), Ident("d"), Ident("s"), Ident("i"), Ident("p"), Ident("w"))),
-		)))
-	}
-	fn := NewFunc("EncodePacket", []NameAndType{
-		{"v", Ident("string")},
-		{"d", Ident("proto_base.Direction")},
-		{"s", Ident("proto_base.State")},
-		{"i", Ident("string")},
-		{"p", Ident("any")},
-		{"w", Ident("io.Writer")},
-	}, []NameAndType{
-		{"err", Ident("error")},
-	})
-	fn.Body = NewBlockEllipsis(SwitchStmt(Ident("v"), NewBlock(s)), Return())
-	decl = fn
-	return
-}
-
-func GenerateVersionSwitcher(versions []string, printTo io.Writer) (err error) {
-	f := NewFile("proto_generated")
-	importPaths := []string{"io", "github.com/admin-else/strom/proto_base"}
-	for _, version := range versions {
-		importPaths = append(importPaths, "github.com/admin-else/strom/proto_generated/v"+strings.ReplaceAll(version, ".", "_"))
-	}
-	AppendDecl(f, Import(importPaths...))
-	AppendDecl(f, GeneratePacketIdentifierToType(versions))
-	AppendDecl(f, GenerateTypeToPacketIdentifier(versions))
-	AppendDecl(f, GenerateDecodePacket(versions))
-	AppendDecl(f, GenerateEncodePacket(versions))
-	return PrintToFile(f, printTo)
-}