extract out protocol

modules/server/render.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"errors"
 	"fes/modules/config"
 	"io/fs"
 	"os"
@@ -16,8 +17,16 @@ type reqData struct {
 	params map[string]string
 }
 
-/* returns a string of rendered html */
-func render(luapath string, requestData reqData) ([]byte, error) {
+/* declarative sets in the page declaration */
+type DeclarativeSets struct {
+	protos struct {
+		http   bool
+		gemini bool
+	}
+}
+
+/* returns a string of rendered markup */
+func render(luapath string, requestData reqData, setBuffer *DeclarativeSets) ([]byte, error) {
 	L := lua.NewState()
 	defer L.Close()
 
@@ -160,5 +169,35 @@ func render(luapath string, requestData reqData) ([]byte, error) {
 		return []byte(s), nil
 	}
 
+	L.GetGlobal("require")
+	L.Push(lua.LString("std"))
+	L.Call(1, 1)
+
+	ret := L.Get(-1)
+	L.Pop(1)
+
+	tbl, ok := ret.(*lua.LTable)
+	if !ok {
+		return nil, errors.New("Could not determine protocol")
+	}
+
+	proto := tbl.RawGetString("proto")
+
+	protoTbl, ok := proto.(*lua.LTable)
+	if !ok {
+		return nil, errors.New("Could not determine protocol")
+	}
+
+	protoTbl.ForEach(func(key lua.LValue, value lua.LValue) {
+		if str, ok := value.(lua.LString); ok {
+			switch str.String() {
+			case "http":
+				setBuffer.protos.http = true
+			case "gemini":
+				setBuffer.protos.gemini = true
+			}
+		}
+	})
+
 	return []byte(""), nil
 }