1 files changed, 103 insertions, 0 deletions
diff --git a/javascript/javascript_runtime.go b/javascript/javascript_runtime.go
new file mode 100644
index 000000000..0a137f72a
--- /dev/null
+++ b/javascript/javascript_runtime.go
@@ -0,0 +1,103 @@
+package javascript
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/xeth"
+	"github.com/obscuren/otto"
+)
+
+var jsrelogger = logger.NewLogger("JSRE")
+
+type JSRE struct {
+	Vm   *otto.Otto
+	xeth *xeth.XEth
+
+	objectCb map[string][]otto.Value
+}
+
+func (jsre *JSRE) LoadExtFile(path string) {
+	result, err := ioutil.ReadFile(path)
+	if err == nil {
+		jsre.Vm.Run(result)
+	} else {
+		jsrelogger.Infoln("Could not load file:", path)
+	}
+}
+
+func (jsre *JSRE) LoadIntFile(file string) {
+	assetPath := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist", "assets", "ext")
+	jsre.LoadExtFile(path.Join(assetPath, file))
+}
+
+func NewJSRE(xeth *xeth.XEth) *JSRE {
+	re := &JSRE{
+		otto.New(),
+		xeth,
+		make(map[string][]otto.Value),
+	}
+
+	// Init the JS lib
+	re.Vm.Run(jsLib)
+
+	// Load extra javascript files
+	re.LoadIntFile("bignumber.min.js")
+
+	re.Bind("eth", &JSEthereum{re.xeth, re.Vm})
+
+	re.initStdFuncs()
+
+	jsrelogger.Infoln("started")
+
+	return re
+}
+
+func (self *JSRE) Bind(name string, v interface{}) {
+	self.Vm.Set(name, v)
+}
+
+func (self *JSRE) Run(code string) (otto.Value, error) {
+	return self.Vm.Run(code)
+}
+
+func (self *JSRE) initStdFuncs() {
+	t, _ := self.Vm.Get("eth")
+	eth := t.Object()
+	eth.Set("require", self.require)
+}
+
+func (self *JSRE) Require(file string) error {
+	if len(filepath.Ext(file)) == 0 {
+		file += ".js"
+	}
+
+	fh, err := os.Open(file)
+	if err != nil {
+		return err
+	}
+
+	content, _ := ioutil.ReadAll(fh)
+	self.Run("exports = {};(function() {" + string(content) + "})();")
+
+	return nil
+}
+
+func (self *JSRE) require(call otto.FunctionCall) otto.Value {
+	file, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.UndefinedValue()
+	}
+	if err := self.Require(file); err != nil {
+		fmt.Println("err:", err)
+		return otto.UndefinedValue()
+	}
+
+	t, _ := self.Vm.Get("exports")
+
+	return t
+}