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package main
import (
"encoding/json"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethpipe"
"github.com/ethereum/eth-go/ethreact"
"github.com/ethereum/eth-go/ethstate"
"github.com/ethereum/go-ethereum/javascript"
"gopkg.in/qml.v1"
)
type AppContainer interface {
Create() error
Destroy()
Window() *qml.Window
Engine() *qml.Engine
NewBlock(*ethchain.Block)
NewWatcher(chan bool)
Messages(ethstate.Messages, string)
Post(string, int)
}
type ExtApplication struct {
*ethpipe.JSPipe
eth ethchain.EthManager
blockChan chan ethreact.Event
messageChan chan ethreact.Event
quitChan chan bool
watcherQuitChan chan bool
filters map[string]*ethchain.Filter
container AppContainer
lib *UiLib
}
func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
app := &ExtApplication{
ethpipe.NewJSPipe(lib.eth),
lib.eth,
make(chan ethreact.Event, 100),
make(chan ethreact.Event, 100),
make(chan bool),
make(chan bool),
make(map[string]*ethchain.Filter),
container,
lib,
}
return app
}
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 {
logger.Errorln(err)
return
}
// Call the main loop
go app.mainLoop()
// Subscribe to events
reactor := app.lib.eth.Reactor()
reactor.Subscribe("newBlock", app.blockChan)
reactor.Subscribe("messages", app.messageChan)
app.container.NewWatcher(app.watcherQuitChan)
win := app.container.Window()
win.Show()
win.Wait()
app.stop()
}
func (app *ExtApplication) stop() {
// Clean up
reactor := app.lib.eth.Reactor()
reactor.Unsubscribe("newBlock", app.blockChan)
// Kill the main loop
app.quitChan <- true
app.watcherQuitChan <- true
close(app.blockChan)
close(app.quitChan)
app.container.Destroy()
}
func (app *ExtApplication) mainLoop() {
out:
for {
select {
case <-app.quitChan:
break out
case block := <-app.blockChan:
if block, ok := block.Resource.(*ethchain.Block); ok {
app.container.NewBlock(block)
}
case msg := <-app.messageChan:
if messages, ok := msg.Resource.(ethstate.Messages); ok {
for id, filter := range app.filters {
msgs := filter.FilterMessages(messages)
if len(msgs) > 0 {
app.container.Messages(msgs, id)
}
}
}
}
}
}
func (self *ExtApplication) Watch(filterOptions map[string]interface{}, identifier string) {
self.filters[identifier] = ethchain.NewFilterFromMap(filterOptions, self.eth)
}
func (self *ExtApplication) GetMessages(object map[string]interface{}) string {
filter := ethchain.NewFilterFromMap(object, self.eth)
messages := filter.Find()
var msgs []javascript.JSMessage
for _, m := range messages {
msgs = append(msgs, javascript.NewJSMessage(m))
}
b, err := json.Marshal(msgs)
if err != nil {
return "{\"error\":" + err.Error() + "}"
}
return string(b)
}
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