125 lines
2.6 KiB
Go
125 lines
2.6 KiB
Go
package main
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import (
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"encoding/json"
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"github.com/ethereum/eth-go/ethchain"
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"github.com/ethereum/eth-go/ethpipe"
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"github.com/ethereum/eth-go/ethstate"
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"github.com/ethereum/eth-go/event"
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"github.com/ethereum/go-ethereum/javascript"
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"gopkg.in/qml.v1"
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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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NewWatcher(chan bool)
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Messages(ethstate.Messages, string)
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Post(string, int)
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}
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type ExtApplication struct {
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*ethpipe.JSPipe
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eth ethchain.EthManager
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events event.Subscription
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watcherQuitChan chan bool
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filters map[string]*ethchain.Filter
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container AppContainer
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lib *UiLib
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}
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func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
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return &ExtApplication{
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JSPipe: ethpipe.NewJSPipe(lib.eth),
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eth: lib.eth,
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watcherQuitChan: make(chan bool),
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filters: make(map[string]*ethchain.Filter),
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container: container,
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lib: lib,
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}
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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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logger.Errorln(err)
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return
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}
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// Subscribe to events
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mux := app.lib.eth.EventMux()
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app.events = mux.Subscribe(ethchain.NewBlockEvent{}, ethstate.Messages(nil))
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// Call the main loop
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go app.mainLoop()
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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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app.events.Unsubscribe()
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// Kill the main loop
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app.watcherQuitChan <- true
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app.container.Destroy()
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}
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func (app *ExtApplication) mainLoop() {
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for ev := range app.events.Chan() {
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switch ev := ev.(type) {
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case ethchain.NewBlockEvent:
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app.container.NewBlock(ev.Block)
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case ethstate.Messages:
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for id, filter := range app.filters {
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msgs := filter.FilterMessages(ev)
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if len(msgs) > 0 {
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app.container.Messages(msgs, id)
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}
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}
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}
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}
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}
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func (self *ExtApplication) Watch(filterOptions map[string]interface{}, identifier string) {
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self.filters[identifier] = ethchain.NewFilterFromMap(filterOptions, self.eth)
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}
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func (self *ExtApplication) GetMessages(object map[string]interface{}) string {
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filter := ethchain.NewFilterFromMap(object, self.eth)
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messages := filter.Find()
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var msgs []javascript.JSMessage
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for _, m := range messages {
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msgs = append(msgs, javascript.NewJSMessage(m))
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}
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b, err := json.Marshal(msgs)
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if err != nil {
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return "{\"error\":" + err.Error() + "}"
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}
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return string(b)
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}
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