path: root/ethutil/natspec/natspec.go

package natspec

import (
    "github.com/obscuren/otto"
    "io/ioutil"
)

type NatSpec struct {
    jsvm *otto.Otto
}

func NewNATSpec(transaction string) (self *NatSpec, err error) {

    self = new(NatSpec)
    self.jsvm = otto.New()
    code, err := ioutil.ReadFile("natspec.js")
    if err != nil {
        return
    }

    _, err = self.jsvm.Run(string(code))
    if err != nil {
        return
    }
    _, err = self.jsvm.Run("var natspec = require('natspec');")
    if err != nil {
        return
    }

    self.jsvm.Run("var transaction = " + transaction + ";")

    return
}

func (self *NatSpec) SetDescription(desc string) (err error) {

    _, err = self.jsvm.Run("var expression = \"" + desc + "\";")
    return

}

func (self *NatSpec) SetABI(abi string) (err error) {

    _, err = self.jsvm.Run("var abi = " + abi + ";")
    return

}

func (self *NatSpec) SetMethod(method string) (err error) {

    _, err = self.jsvm.Run("var method = '" + method + "';")
    return

}

func (self *NatSpec) Parse() string {

    self.jsvm.Run("var call = {method: method,abi: abi,transaction: transaction};")
    value, err := self.jsvm.Run("natspec.evaluateExpression(expression, call);")
    if err != nil {
        return err.Error()
    }
    return value.String()

}