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package ethrepl
import (
"bufio"
"fmt"
"io"
"os"
"path"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/ethlog"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/javascript"
)
var logger = ethlog.NewLogger("REPL")
type Repl interface {
Start()
Stop()
}
type JSRepl struct {
re *javascript.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: javascript.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)
}
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