1 files changed, 454 insertions, 0 deletions
diff --git a/cmd/console/js.go b/cmd/console/js.go
new file mode 100644
index 000000000..20052ed2d
--- /dev/null
+++ b/cmd/console/js.go
@@ -0,0 +1,454 @@
+// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+// MA 02110-1301  USA
+
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"math/big"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"strings"
+
+	"encoding/json"
+
+	"sort"
+
+	"github.com/codegangsta/cli"
+	"github.com/ethereum/go-ethereum/cmd/utils"
+	"github.com/ethereum/go-ethereum/common/docserver"
+	re "github.com/ethereum/go-ethereum/jsre"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/rpc/api"
+	"github.com/ethereum/go-ethereum/rpc/codec"
+	"github.com/ethereum/go-ethereum/rpc/comms"
+	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/peterh/liner"
+	"github.com/robertkrimen/otto"
+)
+
+type prompter interface {
+	AppendHistory(string)
+	Prompt(p string) (string, error)
+	PasswordPrompt(p string) (string, error)
+}
+
+type dumbterm struct{ r *bufio.Reader }
+
+func (r dumbterm) Prompt(p string) (string, error) {
+	fmt.Print(p)
+	line, err := r.r.ReadString('\n')
+	return strings.TrimSuffix(line, "\n"), err
+}
+
+func (r dumbterm) PasswordPrompt(p string) (string, error) {
+	fmt.Println("!! Unsupported terminal, password will echo.")
+	fmt.Print(p)
+	input, err := bufio.NewReader(os.Stdin).ReadString('\n')
+	fmt.Println()
+	return input, err
+}
+
+func (r dumbterm) AppendHistory(string) {}
+
+type jsre struct {
+	re      *re.JSRE
+	wait    chan *big.Int
+	ps1     string
+	atexit  func()
+	datadir string
+	prompter
+}
+
+var (
+	loadedModulesMethods map[string][]string
+)
+
+func loadAutoCompletion(js *jsre, ipcpath string) {
+	modules, err := js.suportedApis(ipcpath)
+	if err != nil {
+		utils.Fatalf("Unable to determine supported modules - %v", err)
+	}
+
+	loadedModulesMethods = make(map[string][]string)
+	for module, _ := range modules {
+		loadedModulesMethods[module] = api.AutoCompletion[module]
+	}
+}
+
+func keywordCompleter(line string) []string {
+	results := make([]string, 0)
+
+	if strings.Contains(line, ".") {
+		elements := strings.Split(line, ".")
+		if len(elements) == 2 {
+			module := elements[0]
+			partialMethod := elements[1]
+			if methods, found := loadedModulesMethods[module]; found {
+				for _, method := range methods {
+					if strings.HasPrefix(method, partialMethod) { // e.g. debug.se
+						results = append(results, module+"."+method)
+					}
+				}
+			}
+		}
+	} else {
+		for module, methods := range loadedModulesMethods {
+			if line == module { // user typed in full module name, show all methods
+				for _, method := range methods {
+					results = append(results, module+"."+method)
+				}
+			} else if strings.HasPrefix(module, line) { // partial method name, e.g. admi
+				results = append(results, module)
+			}
+		}
+	}
+	return results
+}
+
+func apiWordCompleter(line string, pos int) (head string, completions []string, tail string) {
+	if len(line) == 0 {
+		return "", nil, ""
+	}
+
+	i := 0
+	for i = pos - 1; i > 0; i-- {
+		if line[i] == '.' || (line[i] >= 'a' && line[i] <= 'z') || (line[i] >= 'A' && line[i] <= 'Z') {
+			continue
+		}
+		if i >= 3 && line[i] == '3' && line[i-3] == 'w' && line[i-2] == 'e' && line[i-1] == 'b' {
+			continue
+		}
+		i += 1
+		break
+	}
+
+	begin := line[:i]
+	keyword := line[i:pos]
+	end := line[pos:]
+
+	completionWords := keywordCompleter(keyword)
+	return begin, completionWords, end
+}
+
+func newJSRE(libPath, ipcpath string) *jsre {
+	js := &jsre{ps1: "> "}
+	js.wait = make(chan *big.Int)
+
+	// update state in separare forever blocks
+	js.re = re.New(libPath)
+	js.apiBindings(ipcpath)
+
+	if !liner.TerminalSupported() {
+		js.prompter = dumbterm{bufio.NewReader(os.Stdin)}
+	} else {
+		lr := liner.NewLiner()
+		js.withHistory(func(hist *os.File) { lr.ReadHistory(hist) })
+		lr.SetCtrlCAborts(true)
+		loadAutoCompletion(js, ipcpath)
+		lr.SetWordCompleter(apiWordCompleter)
+		lr.SetTabCompletionStyle(liner.TabPrints)
+		js.prompter = lr
+		js.atexit = func() {
+			js.withHistory(func(hist *os.File) { hist.Truncate(0); lr.WriteHistory(hist) })
+			lr.Close()
+			close(js.wait)
+		}
+	}
+	return js
+}
+
+func (js *jsre) apiBindings(ipcpath string) {
+	ethApi := rpc.NewEthereumApi(nil)
+	jeth := rpc.NewJeth(ethApi, js.re, ipcpath)
+
+	js.re.Set("jeth", struct{}{})
+	t, _ := js.re.Get("jeth")
+	jethObj := t.Object()
+	jethObj.Set("send", jeth.SendIpc)
+	jethObj.Set("sendAsync", jeth.SendIpc)
+
+	err := js.re.Compile("bignumber.js", re.BigNumber_JS)
+	if err != nil {
+		utils.Fatalf("Error loading bignumber.js: %v", err)
+	}
+
+	err = js.re.Compile("ethereum.js", re.Web3_JS)
+	if err != nil {
+		utils.Fatalf("Error loading web3.js: %v", err)
+	}
+
+	_, err = js.re.Eval("var web3 = require('web3');")
+	if err != nil {
+		utils.Fatalf("Error requiring web3: %v", err)
+	}
+
+	_, err = js.re.Eval("web3.setProvider(jeth)")
+	if err != nil {
+		utils.Fatalf("Error setting web3 provider: %v", err)
+	}
+
+	apis, err := js.suportedApis(ipcpath)
+	if err != nil {
+		utils.Fatalf("Unable to determine supported api's: %v", err)
+	}
+
+	// load only supported API's in javascript runtime
+	shortcuts := "var eth = web3.eth; "
+	for apiName, _ := range apis {
+		if apiName == api.Web3ApiName || apiName == api.EthApiName {
+			continue // manually mapped
+		}
+
+		if err = js.re.Compile(fmt.Sprintf("%s.js", apiName), api.Javascript(apiName)); err == nil {
+			shortcuts += fmt.Sprintf("var %s = web3.%s; ", apiName, apiName)
+		} else {
+			utils.Fatalf("Error loading %s.js: %v", apiName, err)
+		}
+	}
+
+	_, err = js.re.Eval(shortcuts)
+
+	if err != nil {
+		utils.Fatalf("Error setting namespaces: %v", err)
+	}
+
+	js.re.Eval(globalRegistrar + "registrar = GlobalRegistrar.at(\"" + globalRegistrarAddr + "\");")
+}
+
+var ds = docserver.New("/")
+
+/*
+func (self *jsre) ConfirmTransaction(tx string) bool {
+	if self.ethereum.NatSpec {
+		notice := natspec.GetNotice(self.xeth, tx, ds)
+		fmt.Println(notice)
+		answer, _ := self.Prompt("Confirm Transaction [y/n]")
+		return strings.HasPrefix(strings.Trim(answer, " "), "y")
+	} else {
+		return true
+	}
+}
+
+func (self *jsre) UnlockAccount(addr []byte) bool {
+	fmt.Printf("Please unlock account %x.\n", addr)
+	pass, err := self.PasswordPrompt("Passphrase: ")
+	if err != nil {
+		return false
+	}
+	// TODO: allow retry
+	if err := self.ethereum.AccountManager().Unlock(common.BytesToAddress(addr), pass); err != nil {
+		return false
+	} else {
+		fmt.Println("Account is now unlocked for this session.")
+		return true
+	}
+}
+*/
+
+func (self *jsre) exec(filename string) error {
+	if err := self.re.Exec(filename); err != nil {
+		self.re.Stop(false)
+		return fmt.Errorf("Javascript Error: %v", err)
+	}
+	self.re.Stop(true)
+	return nil
+}
+
+func (self *jsre) suportedApis(ipcpath string) (map[string]string, error) {
+	config := comms.IpcConfig{
+		Endpoint: ipcpath,
+	}
+
+	client, err := comms.NewIpcClient(config, codec.JSON)
+	if err != nil {
+		return nil, err
+	}
+
+	req := shared.Request{
+		Id:      1,
+		Jsonrpc: "2.0",
+		Method:  "modules",
+	}
+
+	err = client.Send(req)
+	if err != nil {
+		return nil, err
+	}
+
+	res, err := client.Recv()
+	if err != nil {
+		return nil, err
+	}
+
+	if sucRes, ok := res.(shared.SuccessResponse); ok {
+		data, _ := json.Marshal(sucRes.Result)
+		apis := make(map[string]string)
+		err = json.Unmarshal(data, &apis)
+		if err == nil {
+			return apis, nil
+		}
+	}
+
+	return nil, fmt.Errorf("Unable to determine supported API's")
+}
+
+// show summary of current geth instance
+func (self *jsre) welcome(ipcpath string) {
+	self.re.Eval(`console.log('instance: ' + web3.version.client);`)
+	self.re.Eval(`console.log(' datadir: ' + admin.datadir);`)
+	self.re.Eval(`console.log("coinbase: " + eth.coinbase);`)
+	self.re.Eval(`var lastBlockTimestamp = 1000 * eth.getBlock(eth.blockNumber).timestamp`)
+	self.re.Eval(`console.log("at block: " + eth.blockNumber + " (" + new Date(lastBlockTimestamp).toLocaleDateString()
+		+ " " + new Date(lastBlockTimestamp).toLocaleTimeString() + ")");`)
+
+	if modules, err := self.suportedApis(ipcpath); err == nil {
+		loadedModules := make([]string, 0)
+		for api, version := range modules {
+			loadedModules = append(loadedModules, fmt.Sprintf("%s:%s", api, version))
+		}
+		sort.Strings(loadedModules)
+
+		self.re.Eval(fmt.Sprintf("var modules = '%s';", strings.Join(loadedModules, " ")))
+		self.re.Eval(`console.log(" modules: " + modules);`)
+	}
+}
+
+func (self *jsre) batch(args cli.Args) {
+	statement := strings.Join(args, " ")
+	val, err := self.re.Run(statement)
+
+	if err != nil {
+		fmt.Printf("error: %v", err)
+	} else if val.IsDefined() && val.IsObject() {
+		obj, _ := self.re.Get("ret_result")
+		fmt.Printf("%v", obj)
+	} else if val.IsDefined() {
+		fmt.Printf("%v", val)
+	}
+
+	if self.atexit != nil {
+		self.atexit()
+	}
+
+	self.re.Stop(false)
+}
+
+func (self *jsre) interactive(ipcpath string) {
+	self.welcome(ipcpath)
+
+	// Read input lines.
+	prompt := make(chan string)
+	inputln := make(chan string)
+	go func() {
+		defer close(inputln)
+		for {
+			line, err := self.Prompt(<-prompt)
+			if err != nil {
+				return
+			}
+			inputln <- line
+		}
+	}()
+	// Wait for Ctrl-C, too.
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, os.Interrupt)
+
+	defer func() {
+		if self.atexit != nil {
+			self.atexit()
+		}
+		self.re.Stop(false)
+	}()
+	for {
+		prompt <- self.ps1
+		select {
+		case <-sig:
+			fmt.Println("caught interrupt, exiting")
+			return
+		case input, ok := <-inputln:
+			if !ok || indentCount <= 0 && input == "exit" {
+				return
+			}
+			if input == "" {
+				continue
+			}
+			str += input + "\n"
+			self.setIndent()
+			if indentCount <= 0 {
+				hist := str[:len(str)-1]
+				self.AppendHistory(hist)
+				self.parseInput(str)
+				str = ""
+			}
+		}
+	}
+}
+
+func (self *jsre) withHistory(op func(*os.File)) {
+	hist, err := os.OpenFile(filepath.Join(self.datadir, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm)
+	if err != nil {
+		fmt.Printf("unable to open history file: %v\n", err)
+		return
+	}
+	op(hist)
+	hist.Close()
+}
+
+func (self *jsre) parseInput(code string) {
+	defer func() {
+		if r := recover(); r != nil {
+			fmt.Println("[native] error", r)
+		}
+	}()
+	value, err := self.re.Run(code)
+	if err != nil {
+		if ottoErr, ok := err.(*otto.Error); ok {
+			fmt.Println(ottoErr.String())
+		} else {
+			fmt.Println(err)
+		}
+		return
+	}
+	self.printValue(value)
+}
+
+var indentCount = 0
+var str = ""
+
+func (self *jsre) setIndent() {
+	open := strings.Count(str, "{")
+	open += strings.Count(str, "(")
+	closed := strings.Count(str, "}")
+	closed += strings.Count(str, ")")
+	indentCount = open - closed
+	if indentCount <= 0 {
+		self.ps1 = "> "
+	} else {
+		self.ps1 = strings.Join(make([]string, indentCount*2), "..")
+		self.ps1 += " "
+	}
+}
+
+func (self *jsre) printValue(v interface{}) {
+	val, err := self.re.PrettyPrint(v)
+	if err == nil {
+		fmt.Printf("%v", val)
+	}
+}