get LStates into goroutines

server/cmd/main.go

@@ -74,7 +74,6 @@ type gameWorldServer struct {
 	db             db.DB
 	msgRouterMutex sync.Mutex
 	msgRouter      map[string]func(*proto.ClientMessage) error
-	Gateway        *witch.Gateway
 	scripts        map[int]*witch.ScriptContext
 	scriptsMutex   sync.RWMutex
 }
@@ -105,17 +104,14 @@ func newServer() (*gameWorldServer, error) {
 }
 
 func (s *gameWorldServer) verbHandler(verb, rest string, sender, target db.Object) error {
-	/*
-		So right here is a problem: we are definitely making >1 LuaState per
-		goroutine. Top priority before anything else is getting a goroutine made
-		for the script contexts
-	*/
+	// I think i should rethink this. sc should maybe be permanent and then they re-create LStates
 	s.scriptsMutex.RLock()
 	sc, ok := s.scripts[target.ID]
 	s.scriptsMutex.RUnlock()
+	var err error
 
-	if !ok || sc.NeedsRefresh(target) {
-		sc, err := witch.NewScriptContext(target)
+	if !ok {
+		sc, err = witch.NewScriptContext()
 		if err != nil {
 			return err
 		}
@@ -125,7 +121,16 @@ func (s *gameWorldServer) verbHandler(verb, rest string, sender, target db.Objec
 		s.scriptsMutex.Unlock()
 	}
 
-	return sc.Handle(verb, rest, sender, target)
+	vc := witch.VerbContext{
+		Verb:   verb,
+		Rest:   rest,
+		Sender: sender,
+		Target: target,
+	}
+
+	sc.Handle(vc)
+
+	return nil
 }
 
 func (s *gameWorldServer) HandleCmd(verb, rest string, sender *db.Object) {
@@ -187,10 +192,10 @@ func (s *gameWorldServer) Commands(stream proto.GameWorld_CommandsServer) error
 		affected, err := s.db.Earshot(*avatar)
 
 		for _, o := range affected {
-			err = s.Gateway.VerbHandler(cmd.Verb, cmd.Rest, *avatar, o)
+			err = s.verbHandler(cmd.Verb, cmd.Rest, *avatar, o)
 		}
 
-		s.HandleCmd(cmd.Verb, cmd.Rest, avatar)
+		//s.HandleCmd(cmd.Verb, cmd.Rest, avatar)
 
 		/*
 
@@ -355,7 +360,7 @@ func (s *gameWorldServer) HandleSay(sender *db.Object, msg string) error {
 	// TODO figure out pointer shit
 
 	for _, h := range heard {
-		s.Gateway.VerbHandler("hears", msg, sender, &h)
+		s.verbHandler("hears", msg, *sender, h)
 		// TODO once we have a script engine, deliver the HEARS event
 		for _, sess := range as {
 			if sess.AccountID == h.OwnerID {

server/witch/header.go

@@ -1,13 +1,16 @@
 package witch
 
 import (
+	"log"
+
 	"github.com/vilmibm/hermeticum/server/db"
 	lua "github.com/yuin/gopher-lua"
 )
 
 func hasWrapper(obj db.Object) func(*lua.LState) int {
 	return func(ls *lua.LState) int {
-		//lv := ls.ToTable(1)
+		lv := ls.ToTable(1)
+		log.Println(lv)
 		return 0
 	}
 }

server/witch/witch.go

@@ -1,6 +1,8 @@
 package witch
 
 import (
+	"log"
+
 	"github.com/vilmibm/hermeticum/server/db"
 	lua "github.com/yuin/gopher-lua"
 )
@@ -13,17 +15,6 @@ import (
 
 */
 
-type ScriptContext struct {
-	script   string
-	l        *lua.LState
-	incoming chan string
-	// TODO whatever is needed to support calling a Go API
-}
-
-func (sc *ScriptContext) NeedsRefresh(obj db.Object) bool {
-	return sc.script != obj.Script
-}
-
 // TODO using a dummy script for now
 
 const dummyScript = `
@@ -60,21 +51,51 @@ end)
 // 	 - do i inject from Go or prepend some Lua code?
 // TODO figure out how the Lua code can affect Go and thus the database
 
-func NewScriptContext(obj db.Object) (*ScriptContext, error) {
-	l := lua.NewState()
-
-	l.SetGlobal("has", l.NewFunction(hasWrapper(obj)))
-	l.SetGlobal("_handlers", l.NewTable())
-
-	//if err := l.DoString(obj.Script); err != nil {
-	if err := l.DoString(dummyScript); err != nil {
-		return nil, err
-	}
-
-	return &ScriptContext{}, nil
+type VerbContext struct {
+	Verb   string
+	Rest   string
+	Sender db.Object
+	Target db.Object
 }
 
-func (sc *ScriptContext) Handle(verb, rest string, sender, target db.Object) error {
-	// TODO call _handle function from the Lstate
-	return nil
+type ScriptContext struct {
+	script   string
+	incoming chan VerbContext
+}
+
+func NewScriptContext() (*ScriptContext, error) {
+	sc := &ScriptContext{}
+	sc.incoming = make(chan VerbContext)
+
+	go func() {
+		var l *lua.LState
+		var err error
+		var vc VerbContext
+		for {
+			vc = <-sc.incoming
+			//if vc.Target.Script != sc.script {
+			if dummyScript != sc.script {
+				//sc.script = vc.Target.Script
+				sc.script = dummyScript
+				l = lua.NewState()
+				l.SetGlobal("has", l.NewFunction(hasWrapper(vc.Target)))
+				l.SetGlobal("hears", l.NewFunction(hearsWrapper(vc.Target)))
+				l.SetGlobal("_handlers", l.NewTable())
+				// TODO other setup
+				//if err := l.DoString(obj.Script); err != nil {
+				if err = l.DoString(dummyScript); err != nil {
+					log.Printf("error parsing script %s: %s", dummyScript, err.Error())
+				}
+			}
+
+			// TODO actually trigger the Lua script
+		}
+	}()
+
+	return sc, nil
+}
+
+func (sc *ScriptContext) Handle(vc VerbContext) {
+	log.Printf("%#v %#v", sc, vc)
+	sc.incoming <- vc
 }