path: root/mist/gui.go

package main

import "C"

import (
    "bytes"
    "encoding/json"
    "fmt"
    "math/big"
    "path"
    "runtime"
    "strconv"
    "strings"
    "time"

    "github.com/ethereum/eth-go"
    "github.com/ethereum/eth-go/ethchain"
    "github.com/ethereum/eth-go/ethdb"
    "github.com/ethereum/eth-go/ethlog"
    "github.com/ethereum/eth-go/ethminer"
    "github.com/ethereum/eth-go/ethpipe"
    "github.com/ethereum/eth-go/ethreact"
    "github.com/ethereum/eth-go/ethutil"
    "github.com/ethereum/eth-go/ethwire"
    "gopkg.in/qml.v1"
)

/*
func LoadExtension(path string) (uintptr, error) {
    lib, err := ffi.NewLibrary(path)
    if err != nil {
        return 0, err
    }

    so, err := lib.Fct("sharedObject", ffi.Pointer, nil)
    if err != nil {
        return 0, err
    }

    ptr := so()

        err = lib.Close()
        if err != nil {
            return 0, err
        }

    return ptr.Interface().(uintptr), nil
}
*/

var logger = ethlog.NewLogger("GUI")

type Gui struct {
    // The main application window
    win *qml.Window
    // QML Engine
    engine    *qml.Engine
    component *qml.Common
    qmlDone   bool
    // The ethereum interface
    eth *eth.Ethereum

    // The public Ethereum library
    uiLib *UiLib

    txDb *ethdb.LDBDatabase

    logLevel ethlog.LogLevel
    open     bool

    pipe *ethpipe.JSPipe

    Session        string
    clientIdentity *ethwire.SimpleClientIdentity
    config         *ethutil.ConfigManager

    plugins map[string]plugin

    miner  *ethminer.Miner
    stdLog ethlog.LogSystem
}

// Create GUI, but doesn't start it
func NewWindow(ethereum *eth.Ethereum, config *ethutil.ConfigManager, clientIdentity *ethwire.SimpleClientIdentity, session string, logLevel int) *Gui {
    db, err := ethdb.NewLDBDatabase("tx_database")
    if err != nil {
        panic(err)
    }

    pipe := ethpipe.NewJSPipe(ethereum)
    gui := &Gui{eth: ethereum, txDb: db, pipe: pipe, logLevel: ethlog.LogLevel(logLevel), Session: session, open: false, clientIdentity: clientIdentity, config: config, plugins: make(map[string]plugin)}
    data, _ := ethutil.ReadAllFile(path.Join(ethutil.Config.ExecPath, "plugins.json"))
    json.Unmarshal([]byte(data), &gui.plugins)

    return gui
}

func (gui *Gui) Start(assetPath string) {

    defer gui.txDb.Close()

    // Register ethereum functions
    qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
        Init: func(p *ethpipe.JSBlock, obj qml.Object) { p.Number = 0; p.Hash = "" },
    }, {
        Init: func(p *ethpipe.JSTransaction, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
    }, {
        Init: func(p *ethpipe.KeyVal, obj qml.Object) { p.Key = ""; p.Value = "" },
    }})
    // Create a new QML engine
    gui.engine = qml.NewEngine()
    context := gui.engine.Context()
    gui.uiLib = NewUiLib(gui.engine, gui.eth, assetPath)

    // Expose the eth library and the ui library to QML
    context.SetVar("gui", gui)
    context.SetVar("eth", gui.uiLib)

    /*
        vec, errr := LoadExtension("/Users/jeffrey/Desktop/build-libqmltest-Desktop_Qt_5_2_1_clang_64bit-Debug/liblibqmltest_debug.dylib")
        fmt.Printf("Fetched vec with addr: %#x\n", vec)
        if errr != nil {
            fmt.Println(errr)
        } else {
            context.SetVar("vec", (unsafe.Pointer)(vec))
        }
    */

    // Load the main QML interface
    data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))

    var win *qml.Window
    var err error
    var addlog = false
    if len(data) == 0 {
        win, err = gui.showKeyImport(context)
    } else {
        win, err = gui.showWallet(context)
        addlog = true
    }
    if err != nil {
        logger.Errorln("asset not found: you can set an alternative asset path on the command line using option 'asset_path'", err)

        panic(err)
    }

    logger.Infoln("Starting GUI")
    gui.open = true
    win.Show()

    // only add the gui logger after window is shown otherwise slider wont be shown
    if addlog {
        ethlog.AddLogSystem(gui)
    }
    win.Wait()

    // need to silence gui logger after window closed otherwise logsystem hangs (but do not save loglevel)
    gui.logLevel = ethlog.Silence
    gui.open = false
}

func (gui *Gui) Stop() {
    if gui.open {
        gui.logLevel = ethlog.Silence
        gui.open = false
        gui.win.Hide()
    }

    gui.uiLib.jsEngine.Stop()

    logger.Infoln("Stopped")
}

func (gui *Gui) showWallet(context *qml.Context) (*qml.Window, error) {
    component, err := gui.engine.LoadFile(gui.uiLib.AssetPath("qml/wallet.qml"))
    if err != nil {
        return nil, err
    }

    gui.win = gui.createWindow(component)

    gui.update()

    return gui.win, nil
}

// The done handler will be called by QML when all views have been loaded
func (gui *Gui) Done() {
    gui.qmlDone = true
}

func (gui *Gui) ImportKey(filePath string) {
}

func (gui *Gui) showKeyImport(context *qml.Context) (*qml.Window, error) {
    context.SetVar("lib", gui)
    component, err := gui.engine.LoadFile(gui.uiLib.AssetPath("qml/first_run.qml"))
    if err != nil {
        return nil, err
    }
    return gui.createWindow(component), nil
}

func (gui *Gui) createWindow(comp qml.Object) *qml.Window {
    win := comp.CreateWindow(nil)

    gui.win = win
    gui.uiLib.win = win

    return gui.win
}

func (gui *Gui) ImportAndSetPrivKey(secret string) bool {
    err := gui.eth.KeyManager().InitFromString(gui.Session, 0, secret)
    if err != nil {
        logger.Errorln("unable to import: ", err)
        return false
    }
    logger.Errorln("successfully imported: ", err)
    return true
}

func (gui *Gui) CreateAndSetPrivKey() (string, string, string, string) {
    err := gui.eth.KeyManager().Init(gui.Session, 0, true)
    if err != nil {
        logger.Errorln("unable to create key: ", err)
        return "", "", "", ""
    }
    return gui.eth.KeyManager().KeyPair().AsStrings()
}

func (gui *Gui) setInitialBlockChain() {
    sBlk := gui.eth.BlockChain().LastBlockHash
    blk := gui.eth.BlockChain().GetBlock(sBlk)
    for ; blk != nil; blk = gui.eth.BlockChain().GetBlock(sBlk) {
        sBlk = blk.PrevHash
        addr := gui.address()

        // Loop through all transactions to see if we missed any while being offline
        for _, tx := range blk.Transactions() {
            if bytes.Compare(tx.Sender(), addr) == 0 || bytes.Compare(tx.Recipient, addr) == 0 {
                if ok, _ := gui.txDb.Get(tx.Hash()); ok == nil {
                    gui.txDb.Put(tx.Hash(), tx.RlpEncode())
                }

            }
        }

        gui.processBlock(blk, true)
    }
}

type address struct {
    Name, Address string
}

func (gui *Gui) loadAddressBook() {
    view := gui.getObjectByName("infoView")
    view.Call("clearAddress")

    nameReg := gui.pipe.World().Config().Get("NameReg")
    if nameReg != nil {
        nameReg.EachStorage(func(name string, value *ethutil.Value) {
            if name[0] != 0 {
                value.Decode()

                view.Call("addAddress", struct{ Name, Address string }{name, ethutil.Bytes2Hex(value.Bytes())})
            }
        })
    }
}

func (gui *Gui) insertTransaction(window string, tx *ethchain.Transaction) {
    nameReg := ethpipe.New(gui.eth).World().Config().Get("NameReg")
    addr := gui.address()

    var inout string
    if bytes.Compare(tx.Sender(), addr) == 0 {
        inout = "send"
    } else {
        inout = "recv"
    }

    var (
        ptx  = ethpipe.NewJSTx(tx)
        send = nameReg.Storage(tx.Sender())
        rec  = nameReg.Storage(tx.Recipient)
        s, r string
    )

    if tx.CreatesContract() {
        rec = nameReg.Storage(tx.CreationAddress())
    }

    if send.Len() != 0 {
        s = strings.Trim(send.Str(), "\x00")
    } else {
        s = ethutil.Bytes2Hex(tx.Sender())
    }
    if rec.Len() != 0 {
        r = strings.Trim(rec.Str(), "\x00")
    } else {
        if tx.CreatesContract() {
            r = ethutil.Bytes2Hex(tx.CreationAddress())
        } else {
            r = ethutil.Bytes2Hex(tx.Recipient)
        }
    }
    ptx.Sender = s
    ptx.Address = r

    if window == "post" {
        //gui.getObjectByName("transactionView").Call("addTx", ptx, inout)
    } else {
        gui.getObjectByName("pendingTxView").Call("addTx", ptx, inout)
    }
}

func (gui *Gui) readPreviousTransactions() {
    it := gui.txDb.Db().NewIterator(nil, nil)
    for it.Next() {
        tx := ethchain.NewTransactionFromBytes(it.Value())

        gui.insertTransaction("post", tx)

    }
    it.Release()
}

func (gui *Gui) processBlock(block *ethchain.Block, initial bool) {
    name := strings.Trim(gui.pipe.World().Config().Get("NameReg").Storage(block.Coinbase).Str(), "\x00")
    b := ethpipe.NewJSBlock(block)
    b.Name = name

    gui.getObjectByName("chainView").Call("addBlock", b, initial)
}

func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) {
    var str string
    if unconfirmedFunds != nil {
        pos := "+"
        if unconfirmedFunds.Cmp(big.NewInt(0)) < 0 {
            pos = "-"
        }
        val := ethutil.CurrencyToString(new(big.Int).Abs(ethutil.BigCopy(unconfirmedFunds)))
        str = fmt.Sprintf("%v (%s %v)", ethutil.CurrencyToString(amount), pos, val)
    } else {
        str = fmt.Sprintf("%v", ethutil.CurrencyToString(amount))
    }

    gui.win.Root().Call("setWalletValue", str)
}

func (self *Gui) getObjectByName(objectName string) qml.Object {
    return self.win.Root().ObjectByName(objectName)
}

// Simple go routine function that updates the list of peers in the GUI
func (gui *Gui) update() {
    // We have to wait for qml to be done loading all the windows.
    for !gui.qmlDone {
        time.Sleep(500 * time.Millisecond)
    }

    go func() {
        go gui.setInitialBlockChain()
        gui.loadAddressBook()
        gui.setPeerInfo()
        gui.readPreviousTransactions()
    }()

    for _, plugin := range gui.plugins {
        logger.Infoln("Loading plugin ", plugin.Name)

        gui.win.Root().Call("addPlugin", plugin.Path, "")
    }

    var (
        blockChan     = make(chan ethreact.Event, 100)
        txChan        = make(chan ethreact.Event, 100)
        objectChan    = make(chan ethreact.Event, 100)
        peerChan      = make(chan ethreact.Event, 100)
        chainSyncChan = make(chan ethreact.Event, 100)
        miningChan    = make(chan ethreact.Event, 100)
    )

    peerUpdateTicker := time.NewTicker(5 * time.Second)
    generalUpdateTicker := time.NewTicker(500 * time.Millisecond)
    statsUpdateTicker := time.NewTicker(5 * time.Second)

    state := gui.eth.StateManager().TransState()

    unconfirmedFunds := new(big.Int)
    gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(state.GetAccount(gui.address()).Balance)))

    lastBlockLabel := gui.getObjectByName("lastBlockLabel")
    miningLabel := gui.getObjectByName("miningLabel")

    go func() {
        for {
            select {
            case b := <-blockChan:
                block := b.Resource.(*ethchain.Block)
                gui.processBlock(block, false)
                if bytes.Compare(block.Coinbase, gui.address()) == 0 {
                    gui.setWalletValue(gui.eth.StateManager().CurrentState().GetAccount(gui.address()).Balance, nil)
                }
            case txMsg := <-txChan:
                tx := txMsg.Resource.(*ethchain.Transaction)

                if txMsg.Name == "newTx:pre" {
                    object := state.GetAccount(gui.address())

                    if bytes.Compare(tx.Sender(), gui.address()) == 0 {
                        unconfirmedFunds.Sub(unconfirmedFunds, tx.Value)
                    } else if bytes.Compare(tx.Recipient, gui.address()) == 0 {
                        unconfirmedFunds.Add(unconfirmedFunds, tx.Value)
                    }

                    gui.setWalletValue(object.Balance, unconfirmedFunds)

                    gui.insertTransaction("pre", tx)
                } else {
                    object := state.GetAccount(gui.address())
                    if bytes.Compare(tx.Sender(), gui.address()) == 0 {
                        object.SubAmount(tx.Value)

                        //gui.getObjectByName("transactionView").Call("addTx", ethpipe.NewJSTx(tx), "send")
                        gui.txDb.Put(tx.Hash(), tx.RlpEncode())
                    } else if bytes.Compare(tx.Recipient, gui.address()) == 0 {
                        object.AddAmount(tx.Value)

                        //gui.getObjectByName("transactionView").Call("addTx", ethpipe.NewJSTx(tx), "recv")
                        gui.txDb.Put(tx.Hash(), tx.RlpEncode())
                    }

                    gui.setWalletValue(object.Balance, nil)

                    state.UpdateStateObject(object)
                }

            case <-objectChan:
                gui.loadAddressBook()
            case <-peerChan:
                gui.setPeerInfo()
            case <-peerUpdateTicker.C:
                gui.setPeerInfo()
            case msg := <-miningChan:
                if msg.Name == "miner:start" {
                    gui.miner = msg.Resource.(*ethminer.Miner)
                } else {
                    gui.miner = nil
                }
            case <-generalUpdateTicker.C:
                statusText := "#" + gui.eth.BlockChain().CurrentBlock.Number.String()
                lastBlockLabel.Set("text", statusText)

                if gui.miner != nil {
                    pow := gui.miner.GetPow()
                    miningLabel.Set("text", "Mining @ "+strconv.FormatInt(pow.GetHashrate(), 10)+"Khash")
                }

                blockLength := gui.eth.BlockPool().BlocksProcessed
                chainLength := gui.eth.BlockPool().ChainLength

                var (
                    pct      float64 = 1.0 / float64(chainLength) * float64(blockLength)
                    dlWidget         = gui.win.Root().ObjectByName("downloadIndicator")
                )
                if pct < 1.0 {
                    dlWidget.Set("visible", true)
                    dlWidget.Set("value", pct)
                } else {
                    dlWidget.Set("visible", false)
                }

            case <-statsUpdateTicker.C:
                gui.setStatsPane()
            }
        }
    }()

    reactor := gui.eth.Reactor()

    reactor.Subscribe("newBlock", blockChan)
    reactor.Subscribe("newTx:pre", txChan)
    reactor.Subscribe("newTx:post", txChan)
    reactor.Subscribe("chainSync", chainSyncChan)
    reactor.Subscribe("miner:start", miningChan)
    reactor.Subscribe("miner:stop", miningChan)

    nameReg := gui.pipe.World().Config().Get("NameReg")
    reactor.Subscribe("object:"+string(nameReg.Address()), objectChan)

    reactor.Subscribe("peerList", peerChan)
}

func (gui *Gui) setStatsPane() {
    var memStats runtime.MemStats
    runtime.ReadMemStats(&memStats)

    statsPane := gui.getObjectByName("statsPane")
    statsPane.Set("text", fmt.Sprintf(`###### Mist 0.6.5 (%s) #######

eth %d (p2p = %d)

CPU:        # %d
Goroutines: # %d
CGoCalls:   # %d

Alloc:      %d
Heap Alloc: %d

CGNext:     %x
NumGC:      %d
`, runtime.Version(),
        eth.ProtocolVersion, eth.P2PVersion,
        runtime.NumCPU, runtime.NumGoroutine(), runtime.NumCgoCall(),
        memStats.Alloc, memStats.HeapAlloc,
        memStats.NextGC, memStats.NumGC,
    ))
}

func (gui *Gui) setPeerInfo() {
    gui.win.Root().Call("setPeers", fmt.Sprintf("%d / %d", gui.eth.PeerCount(), gui.eth.MaxPeers))

    gui.win.Root().Call("resetPeers")
    for _, peer := range gui.pipe.Peers() {
        gui.win.Root().Call("addPeer", peer)
    }
}

func (gui *Gui) privateKey() string {
    return ethutil.Bytes2Hex(gui.eth.KeyManager().PrivateKey())
}

func (gui *Gui) address() []byte {
    return gui.eth.KeyManager().Address()
}