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package ethui
import (
"bufio"
"encoding/hex"
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethutil"
"github.com/niemeyer/qml"
"strings"
"time"
)
// Block interface exposed to QML
type Block struct {
Number int
Hash string
}
type Tx struct {
Value, Hash, Address string
}
func NewTxFromTransaction(tx *ethchain.Transaction) *Tx {
hash := hex.EncodeToString(tx.Hash())
sender := hex.EncodeToString(tx.Recipient)
return &Tx{Hash: hash[:4], Value: tx.Value.String(), Address: sender}
}
// Creates a new QML Block from a chain block
func NewBlockFromBlock(block *ethchain.Block) *Block {
info := block.BlockInfo()
hash := hex.EncodeToString(block.Hash())
return &Block{Number: int(info.Number), Hash: hash}
}
type Gui struct {
// The main application window
win *qml.Window
// QML Engine
engine *qml.Engine
component *qml.Common
// The ethereum interface
eth *eth.Ethereum
// The public Ethereum library
lib *EthLib
}
// Create GUI, but doesn't start it
func New(ethereum *eth.Ethereum) *Gui {
lib := &EthLib{blockManager: ethereum.BlockManager, blockChain: ethereum.BlockManager.BlockChain(), txPool: ethereum.TxPool}
data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
keyRing := ethutil.NewValueFromBytes(data)
addr := keyRing.Get(1).Bytes()
ethereum.BlockManager.WatchAddr(addr)
return &Gui{eth: ethereum, lib: lib}
}
func (ui *Gui) Start() {
// Register ethereum functions
qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
Init: func(p *Block, obj qml.Object) { p.Number = 0; p.Hash = "" },
}, {
Init: func(p *Tx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
}})
ethutil.Config.Log.Infoln("[GUI] Starting GUI")
// Create a new QML engine
ui.engine = qml.NewEngine()
// Load the main QML interface
component, err := ui.engine.LoadFile("wallet.qml")
if err != nil {
panic(err)
}
ui.engine.LoadFile("transactions.qml")
ui.win = component.CreateWindow(nil)
context := ui.engine.Context()
// Expose the eth library and the ui library to QML
context.SetVar("eth", ui.lib)
context.SetVar("ui", &UiLib{engine: ui.engine, eth: ui.eth})
// Register the ui as a block processor
ui.eth.BlockManager.SecondaryBlockProcessor = ui
ui.eth.TxPool.SecondaryProcessor = ui
// Add the ui as a log system so we can log directly to the UGI
ethutil.Config.Log.AddLogSystem(ui)
// Loads previous blocks
go ui.setInitialBlockChain()
go ui.updatePeers()
ui.win.Show()
ui.win.Wait()
}
func (ui *Gui) setInitialBlockChain() {
// Load previous 10 blocks
chain := ui.eth.BlockManager.BlockChain().GetChain(ui.eth.BlockManager.BlockChain().CurrentBlock.Hash(), 10)
for _, block := range chain {
ui.ProcessBlock(block)
}
}
func (ui *Gui) ProcessBlock(block *ethchain.Block) {
ui.win.Root().Call("addBlock", NewBlockFromBlock(block))
}
func (ui *Gui) ProcessTransaction(tx *ethchain.Transaction) {
ui.win.Root().Call("addTx", NewTxFromTransaction(tx))
}
// Logging functions that log directly to the GUI interface
func (ui *Gui) Println(v ...interface{}) {
str := strings.TrimRight(fmt.Sprintln(v...), "\n")
lines := strings.Split(str, "\n")
for _, line := range lines {
ui.win.Root().Call("addLog", line)
}
}
func (ui *Gui) Printf(format string, v ...interface{}) {
str := strings.TrimRight(fmt.Sprintf(format, v...), "\n")
lines := strings.Split(str, "\n")
for _, line := range lines {
ui.win.Root().Call("addLog", line)
}
}
// Simple go routine function that updates the list of peers in the GUI
func (ui *Gui) updatePeers() {
for {
ui.win.Root().Call("setPeers", fmt.Sprintf("%d / %d", ui.eth.Peers().Len(), ui.eth.MaxPeers))
time.Sleep(1 * time.Second)
}
}
// UI Library that has some basic functionality exposed
type UiLib struct {
engine *qml.Engine
eth *eth.Ethereum
connected bool
}
// Opens a QML file (external application)
func (ui *UiLib) Open(path string) {
component, err := ui.engine.LoadFile(path[7:])
if err != nil {
ethutil.Config.Log.Debugln(err)
}
win := component.CreateWindow(nil)
go func() {
win.Show()
win.Wait()
}()
}
func (ui *UiLib) Connect() {
if !ui.connected {
ui.eth.Start()
}
}
func (ui *UiLib) ConnectToPeer(addr string) {
ui.eth.ConnectToPeer(addr)
}
type Tester struct {
root qml.Object
}
func (t *Tester) Compile(area qml.Object) {
fmt.Println(area)
ethutil.Config.Log.Infoln("[TESTER] Compiling")
code := area.String("text")
scanner := bufio.NewScanner(strings.NewReader(code))
scanner.Split(bufio.ScanLines)
var lines []string
for scanner.Scan() {
lines = append(lines, scanner.Text())
}
}
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