path: root/cmd/mist/html_container.go

package main

import (
    "encoding/json"
    "errors"
    "fmt"
    "io/ioutil"
    "net/url"
    "os"
    "path"
    "path/filepath"

    "github.com/ethereum/go-ethereum/ethchain"
    "github.com/ethereum/go-ethereum/ethpipe"
    "github.com/ethereum/go-ethereum/ethstate"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/javascript"
    "github.com/howeyc/fsnotify"
    "gopkg.in/qml.v1"
)

type HtmlApplication struct {
    win     *qml.Window
    webView qml.Object
    engine  *qml.Engine
    lib     *UiLib
    path    string
    watcher *fsnotify.Watcher
}

func NewHtmlApplication(path string, lib *UiLib) *HtmlApplication {
    engine := qml.NewEngine()

    return &HtmlApplication{engine: engine, lib: lib, path: path}

}

func (app *HtmlApplication) Create() error {
    component, err := app.engine.LoadFile(app.lib.AssetPath("qml/webapp.qml"))
    if err != nil {
        return err
    }

    if filepath.Ext(app.path) == "eth" {
        return errors.New("Ethereum package not yet supported")

        // TODO
        //ethutil.OpenPackage(app.path)
    }

    win := component.CreateWindow(nil)
    win.Set("url", app.path)
    webView := win.ObjectByName("webView")

    app.win = win
    app.webView = webView

    return nil
}

func (app *HtmlApplication) RootFolder() string {
    folder, err := url.Parse(app.path)
    if err != nil {
        return ""
    }
    return path.Dir(ethutil.WindonizePath(folder.RequestURI()))
}
func (app *HtmlApplication) RecursiveFolders() []os.FileInfo {
    files, _ := ioutil.ReadDir(app.RootFolder())
    var folders []os.FileInfo
    for _, file := range files {
        if file.IsDir() {
            folders = append(folders, file)
        }
    }
    return folders
}

func (app *HtmlApplication) NewWatcher(quitChan chan bool) {
    var err error

    app.watcher, err = fsnotify.NewWatcher()
    if err != nil {
        logger.Infoln("Could not create new auto-reload watcher:", err)
        return
    }
    err = app.watcher.Watch(app.RootFolder())
    if err != nil {
        logger.Infoln("Could not start auto-reload watcher:", err)
        return
    }
    for _, folder := range app.RecursiveFolders() {
        fullPath := app.RootFolder() + "/" + folder.Name()
        app.watcher.Watch(fullPath)
    }

    go func() {
    out:
        for {
            select {
            case <-quitChan:
                app.watcher.Close()
                break out
            case <-app.watcher.Event:
                //logger.Debugln("Got event:", ev)
                app.webView.Call("reload")
            case err := <-app.watcher.Error:
                // TODO: Do something here
                logger.Infoln("Watcher error:", err)
            }
        }
    }()

}

func (app *HtmlApplication) Engine() *qml.Engine {
    return app.engine
}

func (app *HtmlApplication) Window() *qml.Window {
    return app.win
}

func (app *HtmlApplication) NewBlock(block *ethchain.Block) {
    b := &ethpipe.JSBlock{Number: int(block.BlockInfo().Number), Hash: ethutil.Bytes2Hex(block.Hash())}
    app.webView.Call("onNewBlockCb", b)
}

func (self *HtmlApplication) Messages(messages ethstate.Messages, id string) {
    var msgs []javascript.JSMessage
    for _, m := range messages {
        msgs = append(msgs, javascript.NewJSMessage(m))
    }

    b, _ := json.Marshal(msgs)

    self.webView.Call("onWatchedCb", string(b), id)
}

func (app *HtmlApplication) Destroy() {
    app.engine.Destroy()
}

func (app *HtmlApplication) Post(data string, seed int) {
    fmt.Println("about to call 'post'")
    app.webView.Call("post", seed, data)
}