path: root/cmd/mist/gui.go

/*
    This file is part of go-ethereum

    go-ethereum 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 3 of the License, or
    (at your option) any later version.

    go-ethereum 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 go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @authors
 *  Jeffrey Wilcke <i@jev.io>
 */
package main

import "C"

import (
    "encoding/json"
    "fmt"
    "math/big"
    "path"
    "runtime"
    "sort"
    "time"

    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/eth"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/logger"
    "github.com/ethereum/go-ethereum/ui/qt/qwhisper"
    "github.com/ethereum/go-ethereum/xeth"
    "github.com/obscuren/qml"
)

var guilogger = logger.NewLogger("GUI")

type ServEv byte

const (
    setup ServEv = iota
    update
)

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

    // The public Ethereum library
    uiLib   *UiLib
    whisper *qwhisper.Whisper

    txDb *ethdb.LDBDatabase

    open bool

    xeth *xeth.XEth

    Session string

    plugins map[string]plugin
}

// Create GUI, but doesn't start it
func NewWindow(ethereum *eth.Ethereum) *Gui {
    db, err := ethdb.NewLDBDatabase(path.Join(ethereum.DataDir, "tx_database"))
    if err != nil {
        panic(err)
    }

    xeth := xeth.New(ethereum, nil)
    gui := &Gui{eth: ethereum,
        txDb:          db,
        xeth:          xeth,
        open:          false,
        plugins:       make(map[string]plugin),
        serviceEvents: make(chan ServEv, 1),
    }
    data, _ := common.ReadAllFile(path.Join(ethereum.DataDir, "plugins.json"))
    json.Unmarshal([]byte(data), &gui.plugins)

    return gui
}

func (gui *Gui) Start(assetPath, libPath string) {
    defer gui.txDb.Close()

    guilogger.Infoln("Starting GUI")

    go gui.service()

    // Register ethereum functions
    qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
        Init: func(p *xeth.Block, obj qml.Object) { p.Number = 0; p.Hash = "" },
    }, {
        Init: func(p *xeth.Transaction, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
    }, {
        Init: func(p *xeth.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, libPath)
    gui.whisper = qwhisper.New(gui.eth.Whisper())

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

    win, err := gui.showWallet(context)
    if err != nil {
        guilogger.Errorln("asset not found: you can set an alternative asset path on the command line using option 'asset_path'", err)

        panic(err)
    }

    gui.open = true
    win.Show()

    win.Wait()
    gui.open = false
}

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

    guilogger.Infoln("Stopped")
}

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

    gui.createWindow(component)

    return gui.win, nil
}

func (gui *Gui) GenerateKey() {
    _, err := gui.eth.AccountManager().NewAccount("hurr")
    if err != nil {
        // TODO: UI feedback?
    }
}

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 {
    gui.win = comp.CreateWindow(nil)
    gui.uiLib.win = gui.win

    return gui.win
}

func (gui *Gui) setInitialChain(ancientBlocks bool) {
    sBlk := gui.eth.ChainManager().LastBlockHash()
    blk := gui.eth.ChainManager().GetBlock(sBlk)
    for ; blk != nil; blk = gui.eth.ChainManager().GetBlock(sBlk) {
        sBlk = blk.ParentHash()
        gui.processBlock(blk, true)
    }
}

func (gui *Gui) loadAddressBook() {
    /*
        view := gui.getObjectByName("infoView")
        nameReg := gui.xeth.World().Config().Get("NameReg")
        if nameReg != nil {
            it := nameReg.Trie().Iterator()
            for it.Next() {
                if it.Key[0] != 0 {
                    view.Call("addAddress", struct{ Name, Address string }{string(it.Key), common.Bytes2Hex(it.Value)})
                }

            }
        }
    */
}

func (self *Gui) loadMergedMiningOptions() {
    /*
        view := self.getObjectByName("mergedMiningModel")

        mergeMining := self.xeth.World().Config().Get("MergeMining")
        if mergeMining != nil {
            i := 0
            it := mergeMining.Trie().Iterator()
            for it.Next() {
                view.Call("addMergedMiningOption", struct {
                    Checked       bool
                    Name, Address string
                    Id, ItemId    int
                }{false, string(it.Key), common.Bytes2Hex(it.Value), 0, i})

                i++

            }
        }
    */
}

func (gui *Gui) insertTransaction(window string, tx *types.Transaction) {
    var inout string
    if gui.eth.AccountManager().HasAccount(tx.From()) {
        inout = "send"
    } else {
        inout = "recv"
    }

    var (
        ptx  = xeth.NewTx(tx)
        send = common.Bytes2Hex(tx.From())
        rec  = common.Bytes2Hex(tx.To())
    )
    ptx.Sender = send
    ptx.Address = rec

    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.NewIterator()
    for it.Next() {
        tx := types.NewTransactionFromBytes(it.Value())

        gui.insertTransaction("post", tx)

    }
    it.Release()
}

func (gui *Gui) processBlock(block *types.Block, initial bool) {
    name := common.Bytes2Hex(block.Coinbase())
    b := xeth.NewBlock(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 := common.CurrencyToString(new(big.Int).Abs(common.BigCopy(unconfirmedFunds)))
        str = fmt.Sprintf("%v (%s %v)", common.CurrencyToString(amount), pos, val)
    } else {
        str = fmt.Sprintf("%v", common.CurrencyToString(amount))
    }

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

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

func (gui *Gui) SendCommand(cmd ServEv) {
    gui.serviceEvents <- cmd
}

func (gui *Gui) service() {
    for ev := range gui.serviceEvents {
        switch ev {
        case setup:
            go gui.setup()
        case update:
            go gui.update()
        }
    }
}

func (gui *Gui) setup() {
    for gui.win == nil {
        time.Sleep(time.Millisecond * 200)
    }

    for _, plugin := range gui.plugins {
        guilogger.Infoln("Loading plugin ", plugin.Name)
        gui.win.Root().Call("addPlugin", plugin.Path, "")
    }

    go func() {
        go gui.setInitialChain(false)
        gui.loadAddressBook()
        gui.loadMergedMiningOptions()
        gui.setPeerInfo()
    }()

    gui.whisper.SetView(gui.getObjectByName("whisperView"))

    gui.SendCommand(update)
}

// Simple go routine function that updates the list of peers in the GUI
func (gui *Gui) update() {
    peerUpdateTicker := time.NewTicker(5 * time.Second)
    generalUpdateTicker := time.NewTicker(500 * time.Millisecond)
    statsUpdateTicker := time.NewTicker(5 * time.Second)

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

    events := gui.eth.EventMux().Subscribe(
        core.ChainEvent{},
        core.TxPreEvent{},
        core.TxPostEvent{},
    )

    defer events.Unsubscribe()
    for {
        select {
        case ev, isopen := <-events.Chan():
            if !isopen {
                return
            }
            switch ev := ev.(type) {
            case core.ChainEvent:
                gui.processBlock(ev.Block, false)
            case core.TxPreEvent:
                gui.insertTransaction("pre", ev.Tx)

            case core.TxPostEvent:
                gui.getObjectByName("pendingTxView").Call("removeTx", xeth.NewTx(ev.Tx))
            }

        case <-peerUpdateTicker.C:
            gui.setPeerInfo()

        case <-generalUpdateTicker.C:
            statusText := "#" + gui.eth.ChainManager().CurrentBlock().Number().String()
            lastBlockLabel.Set("text", statusText)
            //miningLabel.Set("text", strconv.FormatInt(gui.uiLib.Miner().HashRate(), 10))
        case <-statsUpdateTicker.C:
            gui.setStatsPane()
        }
    }
}

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

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

eth %d (p2p = %d)

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

Alloc:      %d
Heap Alloc: %d

CGNext:     %x
NumGC:      %d
`, Version, runtime.Version(),
        eth.ProtocolVersion, 2,
        runtime.NumCPU, runtime.NumGoroutine(), runtime.NumCgoCall(),
        memStats.Alloc, memStats.HeapAlloc,
        memStats.NextGC, memStats.NumGC,
    ))
}

type qmlpeer struct{ Addr, NodeID, Name, Caps string }

type peersByID []*qmlpeer

func (s peersByID) Len() int           { return len(s) }
func (s peersByID) Less(i, j int) bool { return s[i].NodeID < s[j].NodeID }
func (s peersByID) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }

func (gui *Gui) setPeerInfo() {
    peers := gui.eth.Peers()
    qpeers := make(peersByID, len(peers))
    for i, p := range peers {
        qpeers[i] = &qmlpeer{
            NodeID: p.ID().String(),
            Addr:   p.RemoteAddr().String(),
            Name:   p.Name(),
            Caps:   fmt.Sprint(p.Caps()),
        }
    }
    // we need to sort the peers because they jump around randomly
    // otherwise. order returned by eth.Peers is random because they
    // are taken from a map.
    sort.Sort(qpeers)

    gui.win.Root().Call("setPeerCounters", fmt.Sprintf("%d / %d", len(peers), gui.eth.MaxPeers()))
    gui.win.Root().Call("clearPeers")
    for _, p := range qpeers {
        gui.win.Root().Call("addPeer", p)
    }
}

/*
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
}
*/
/*
    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))
    }
*/