path: root/cmd/mist/ext_app.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 (
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/event"
    "github.com/ethereum/go-ethereum/ui/qt"
    "github.com/ethereum/go-ethereum/xeth"
    "github.com/obscuren/qml"
)

type AppContainer interface {
    Create() error
    Destroy()

    Window() *qml.Window
    Engine() *qml.Engine

    NewBlock(*types.Block)
    NewWatcher(chan bool)
    Post(string, int)
}

type ExtApplication struct {
    *xeth.XEth
    eth core.Backend

    events          event.Subscription
    watcherQuitChan chan bool

    filters map[string]*core.Filter

    container AppContainer
    lib       *UiLib
}

func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
    return &ExtApplication{
        XEth:            xeth.New(lib.eth),
        eth:             lib.eth,
        watcherQuitChan: make(chan bool),
        filters:         make(map[string]*core.Filter),
        container:       container,
        lib:             lib,
    }
}

func (app *ExtApplication) run() {
    // Set the "eth" api on to the containers context
    context := app.container.Engine().Context()
    context.SetVar("eth", app)
    context.SetVar("ui", app.lib)

    err := app.container.Create()
    if err != nil {
        guilogger.Errorln(err)
        return
    }

    // Call the main loop
    go app.mainLoop()

    app.container.NewWatcher(app.watcherQuitChan)

    win := app.container.Window()
    win.Show()
    win.Wait()

    app.stop()
}

func (app *ExtApplication) stop() {
    app.events.Unsubscribe()

    // Kill the main loop
    app.watcherQuitChan <- true

    app.container.Destroy()
}

func (app *ExtApplication) mainLoop() {
    for ev := range app.events.Chan() {
        switch ev := ev.(type) {
        case core.NewBlockEvent:
            app.container.NewBlock(ev.Block)

            /* TODO remove
            case state.Messages:
                for id, filter := range app.filters {
                    msgs := filter.FilterMessages(ev)
                    if len(msgs) > 0 {
                        app.container.Messages(msgs, id)
                    }
                }
            */
        }
    }
}

func (self *ExtApplication) Watch(filterOptions map[string]interface{}, identifier string) {
    self.filters[identifier] = qt.NewFilterFromMap(filterOptions, self.eth)
}