#23 Added NAVIGATE

pkg/stdlib/html/driver/browser/eval/eval.go

@@ -2,11 +2,11 @@ package eval
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
 	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/dom"
 	"github.com/mafredri/cdp/protocol/runtime"
 )
 
@@ -36,15 +36,82 @@ func Eval(client *cdp.Client, exp string, ret bool, async bool) (core.Value, err
 	}
 
 	if out.Result.Type != "undefined" {
-		var o interface{}
+		return values.Unmarshal(out.Result.Value)
+	}
 
-		err := json.Unmarshal(out.Result.Value, &o)
+	return Unmarshal(&out.Result)
+}
 
-		if err != nil {
-			return values.None, core.Error(core.ErrUnexpected, err.Error())
+func Property(
+	ctx context.Context,
+	client *cdp.Client,
+	id dom.NodeID,
+	propName string,
+) (core.Value, error) {
+	// get a ref to remote object representing the node
+	obj, err := client.DOM.ResolveNode(
+		ctx,
+		dom.NewResolveNodeArgs().
+			SetNodeID(id),
+	)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	if obj.Object.ObjectID == nil {
+		return values.None, core.Error(core.ErrNotFound, fmt.Sprintf("element %d", id))
+	}
+
+	defer client.Runtime.ReleaseObject(ctx, runtime.NewReleaseObjectArgs(*obj.Object.ObjectID))
+
+	res, err := client.Runtime.GetProperties(
+		ctx,
+		runtime.NewGetPropertiesArgs(*obj.Object.ObjectID),
+	)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	if res.ExceptionDetails != nil {
+		return values.None, res.ExceptionDetails
+	}
+
+	// all props
+	if propName == "" {
+		var arr *values.Array
+		arr = values.NewArray(len(res.Result))
+
+		for _, prop := range res.Result {
+			val, err := Unmarshal(prop.Value)
+
+			if err != nil {
+				return values.None, err
+			}
+
+			arr.Push(val)
 		}
 
-		return values.Parse(o), nil
+		return arr, nil
+	}
+
+	for _, prop := range res.Result {
+		if prop.Name == propName {
+			return Unmarshal(prop.Value)
+		}
+	}
+
+	return values.None, nil
+}
+
+func Unmarshal(obj *runtime.RemoteObject) (core.Value, error) {
+	if obj == nil {
+		return values.None, nil
+	}
+
+	if obj.Type != "undefined" {
+		return values.Unmarshal(obj.Value)
 	}
 
 	return values.None, nil