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package main
import (
"bufio"
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethpub"
"github.com/ethereum/eth-go/ethutil"
"github.com/obscuren/otto"
"io"
"os"
"path"
)
type Repl interface {
Start()
Stop()
}
type JSRepl struct {
re *JSRE
prompt string
history *os.File
running bool
}
func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
hist, err := os.OpenFile(path.Join(ethutil.Config.ExecPath, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm)
if err != nil {
panic(err)
}
return &JSRepl{re: NewJSRE(ethereum), prompt: "> ", history: hist}
}
func (self *JSRepl) Start() {
if !self.running {
self.running = true
logger.Infoln("init JS Console")
reader := bufio.NewReader(self.history)
for {
line, err := reader.ReadString('\n')
if err != nil && err == io.EOF {
break
} else if err != nil {
fmt.Println("error reading history", err)
break
}
addHistory(line[:len(line)-1])
}
self.read()
}
}
func (self *JSRepl) Stop() {
if self.running {
self.running = false
self.re.Stop()
logger.Infoln("exit JS Console")
self.history.Close()
}
}
func (self *JSRepl) parseInput(code string) {
defer func() {
if r := recover(); r != nil {
fmt.Println("[native] error", r)
}
}()
value, err := self.re.Run(code)
if err != nil {
fmt.Println(err)
return
}
self.PrintValue(value)
}
// The JSEthereum object attempts to wrap the PEthereum object and returns
// meaningful javascript objects
type JSBlock struct {
*ethpub.PBlock
eth *JSEthereum
}
func (self *JSBlock) GetTransaction(hash string) otto.Value {
return self.eth.toVal(self.PBlock.GetTransaction(hash))
}
type JSEthereum struct {
*ethpub.PEthereum
vm *otto.Otto
}
func (self *JSEthereum) GetBlock(hash string) otto.Value {
return self.toVal(&JSBlock{self.PEthereum.GetBlock(hash), self})
}
func (self *JSEthereum) GetPeers() otto.Value {
return self.toVal(self.PEthereum.GetPeers())
}
func (self *JSEthereum) GetKey() otto.Value {
return self.toVal(self.PEthereum.GetKey())
}
func (self *JSEthereum) GetStateObject(addr string) otto.Value {
return self.toVal(self.PEthereum.GetStateObject(addr))
}
func (self *JSEthereum) GetStateKeyVals(addr string) otto.Value {
return self.toVal(self.PEthereum.GetStateObject(addr).StateKeyVal(false))
}
func (self *JSEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) otto.Value {
r, err := self.PEthereum.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
if err != nil {
fmt.Println(err)
return otto.UndefinedValue()
}
return self.toVal(r)
}
func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, scriptStr string) otto.Value {
r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, scriptStr)
if err != nil {
fmt.Println(err)
return otto.UndefinedValue()
}
return self.toVal(r)
}
func (self *JSEthereum) toVal(v interface{}) otto.Value {
result, err := self.vm.ToValue(v)
if err != nil {
fmt.Println("Value unknown:", err)
return otto.UndefinedValue()
}
return result
}
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