forked from cerc-io/plugeth
133 lines
2.8 KiB
Go
133 lines
2.8 KiB
Go
package main
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import (
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"fmt"
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"github.com/ethereum/eth-go/ethchain"
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"github.com/ethereum/eth-go/ethpub"
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"github.com/ethereum/eth-go/ethutil"
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"github.com/go-qml/qml"
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)
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type AppContainer interface {
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Create() error
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Destroy()
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Window() *qml.Window
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Engine() *qml.Engine
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NewBlock(*ethchain.Block)
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ObjectChanged(*ethchain.StateObject)
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StorageChanged(*ethchain.StorageState)
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NewWatcher(chan bool)
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}
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type ExtApplication struct {
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*ethpub.PEthereum
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blockChan chan ethutil.React
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changeChan chan ethutil.React
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quitChan chan bool
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watcherQuitChan chan bool
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container AppContainer
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lib *UiLib
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registeredEvents []string
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}
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func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
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app := &ExtApplication{
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ethpub.NewPEthereum(lib.eth),
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make(chan ethutil.React, 1),
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make(chan ethutil.React, 1),
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make(chan bool),
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make(chan bool),
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container,
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lib,
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nil,
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}
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return app
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}
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func (app *ExtApplication) run() {
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// Set the "eth" api on to the containers context
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context := app.container.Engine().Context()
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context.SetVar("eth", app)
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context.SetVar("ui", app.lib)
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err := app.container.Create()
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if err != nil {
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fmt.Println(err)
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return
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}
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// Call the main loop
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go app.mainLoop()
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// Subscribe to events
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reactor := app.lib.eth.Reactor()
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reactor.Subscribe("newBlock", app.blockChan)
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app.container.NewWatcher(app.watcherQuitChan)
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win := app.container.Window()
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win.Show()
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win.Wait()
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app.stop()
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}
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func (app *ExtApplication) stop() {
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// Clean up
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reactor := app.lib.eth.Reactor()
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reactor.Unsubscribe("newBlock", app.blockChan)
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for _, event := range app.registeredEvents {
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reactor.Unsubscribe(event, app.changeChan)
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}
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// Kill the main loop
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app.quitChan <- true
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app.watcherQuitChan <- true
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close(app.blockChan)
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close(app.quitChan)
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close(app.changeChan)
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app.container.Destroy()
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}
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func (app *ExtApplication) mainLoop() {
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out:
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for {
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select {
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case <-app.quitChan:
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break out
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case block := <-app.blockChan:
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if block, ok := block.Resource.(*ethchain.Block); ok {
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app.container.NewBlock(block)
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}
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case object := <-app.changeChan:
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if stateObject, ok := object.Resource.(*ethchain.StateObject); ok {
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app.container.ObjectChanged(stateObject)
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} else if storageObject, ok := object.Resource.(*ethchain.StorageState); ok {
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app.container.StorageChanged(storageObject)
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}
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}
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}
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}
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func (app *ExtApplication) Watch(addr, storageAddr string) {
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var event string
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if len(storageAddr) == 0 {
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event = "object:" + string(ethutil.Hex2Bytes(addr))
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app.lib.eth.Reactor().Subscribe(event, app.changeChan)
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} else {
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event = "storage:" + string(ethutil.Hex2Bytes(addr)) + ":" + string(ethutil.Hex2Bytes(storageAddr))
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app.lib.eth.Reactor().Subscribe(event, app.changeChan)
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}
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app.registeredEvents = append(app.registeredEvents, event)
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}
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