Merge pull request #150 from fjl/develop

Merge eth-go repo into go-ethereum

1 files changed, 142 insertions, 0 deletions

diff --git a/cmd/mist/ext_app.go b/cmd/mist/ext_app.go
new file mode 100644
index 000000000..7680106f0
--- /dev/null
+++ b/cmd/mist/ext_app.go
@@ -0,0 +1,142 @@
+// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
+//
+// This library 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 2.1 of the License, or (at your option) any later version.
+//
+// This library 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 this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+// MA 02110-1301  USA
+
+package main
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/ethchain"
+	"github.com/ethereum/go-ethereum/ethpipe"
+	"github.com/ethereum/go-ethereum/ethstate"
+	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/javascript"
+	"github.com/ethereum/go-ethereum/ui/qt"
+	"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
+
+	events          event.Subscription
+	watcherQuitChan chan bool
+
+	filters map[string]*ethchain.Filter
+
+	container AppContainer
+	lib       *UiLib
+}
+
+func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
+	return &ExtApplication{
+		JSPipe:          ethpipe.NewJSPipe(lib.eth),
+		eth:             lib.eth,
+		watcherQuitChan: make(chan bool),
+		filters:         make(map[string]*ethchain.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 {
+		logger.Errorln(err)
+		return
+	}
+
+	// Subscribe to events
+	mux := app.lib.eth.EventMux()
+	app.events = mux.Subscribe(ethchain.NewBlockEvent{}, ethstate.Messages(nil))
+
+	// 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 ethchain.NewBlockEvent:
+			app.container.NewBlock(ev.Block)
+
+		case ethstate.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)
+}
+
+func (self *ExtApplication) GetMessages(object map[string]interface{}) string {
+	filter := qt.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)
+}