libcwtch-go/lib.go

package cwtch
//package main

import "C"
import (
	"crypto/rand"
	"cwtch.im/cwtch/app"
	"cwtch.im/cwtch/event"
	"cwtch.im/cwtch/peer"
	"encoding/json"
	"fmt"

	"encoding/base64"
	"git.openprivacy.ca/openprivacy/connectivity/tor"
	"git.openprivacy.ca/openprivacy/log"
	mrand "math/rand"
	"os"
	"path"
	"path/filepath"
	"time"
)

var application app.Application
var acnQueue event.Queue
var contactEventsQueue event.Queue

//export c_StartCwtch
func c_StartCwtch(dir_c *C.char, len C.int, tor_c *C.char, torLen C.int) {
	dir := C.GoStringN(dir_c, len)
	tor := C.GoStringN(tor_c, torLen)
	StartCwtch(dir, tor)
}

func StartCwtch(appDir string, torPath string) {
	//go func (appDir string, torPath string) {
		log.SetLevel(log.LevelDebug)

		log.Infof("Loading Cwtch Directory %v and tor path: %v", appDir, torPath)

		mrand.Seed(int64(time.Now().Nanosecond()))
		port := mrand.Intn(1000) + 9600
		controlPort := port + 1

		// generate a random password (actually random, stored in memory, for the control port)
		key := make([]byte, 64)
		_, err := rand.Read(key)
		if err != nil {
			panic(err)
		}

		log.Infof("making directory %v", appDir)
		os.MkdirAll(path.Join(appDir, "/.tor", "tor"), 0700)
		tor.NewTorrc().WithSocksPort(port).WithOnionTrafficOnly().WithControlPort(controlPort).WithHashedPassword(base64.StdEncoding.EncodeToString(key)).Build(filepath.Join(appDir, ".tor", "tor", "torrc"))
		acn, err := tor.NewTorACNWithAuth(path.Join(appDir, "/.tor"), torPath, controlPort, tor.HashedPasswordAuthenticator{base64.StdEncoding.EncodeToString(key)})
		if err != nil {
			log.Errorf("\nError connecting to Tor: %v\n", err)
		}
		//acn.WaitTillBootstrapped()

		newApp := app.NewApp(acn, appDir)
		acnQueue = event.NewQueue()
		newApp.GetPrimaryBus().Subscribe(event.ACNStatus, acnQueue)
		peer.DefaultEventsToHandle = []event.Type{
			event.EncryptedGroupMessage,
			event.NewMessageFromPeer,
			event.PeerAcknowledgement,
			event.NewGroupInvite,
			event.PeerError,
			event.SendMessageToGroupError,
			event.NewGetValMessageFromPeer,
			event.PeerStateChange,
		}
		newApp.LoadProfiles("be gay do crime")
		newApp.LaunchPeers()
		application = newApp
	//}(appDir, torPath)
}

//export c_ACNEvents
func c_ACNEvents() *C.char {
	return C.CString(ACNEvents())
}

func ACNEvents() string {
	select {
	case myevent := <- acnQueue.OutChan():
		return fmt.Sprintf("%v", myevent)
	default:
		return ""
	}
}

//export c_GetProfiles
func c_GetProfiles() *C.char {
	return C.CString(GetProfiles())
}

func GetProfiles() string {
	profiles := application.ListPeers()
	jsonBytes,_ := json.Marshal(profiles)
	return string(jsonBytes)
}


type Contact struct {
	Name string `json:"name"`
	Onion string `json:"onion"`
	Status string `json:"status"`
}

//export c_GetContacts
func c_GetContacts(onion_ptr *C.char, onion_len C.int) *C.char {
	return C.CString(GetContacts(C.GoStringN(onion_ptr, onion_len)))
}

func GetContacts(onion string)string {
	log.Infof("Get Contacts for %v", onion)
	mypeer := application.GetPeer(onion)

	contactEventsQueue = event.NewQueue()
	application.GetEventBus(onion).Subscribe(event.PeerStateChange, contactEventsQueue)

	var contacts []Contact
	for _,contact := range mypeer.GetContacts() {
		contactInfo := mypeer.GetContact(contact)
		log.Infof("contactInfo %v", contactInfo)
		contacts = append(contacts, Contact{Name: contactInfo.Name, Onion: contactInfo.Onion, Status: contactInfo.State})
	}

	bytes,_ := json.Marshal(contacts)
	return string(bytes)
}



//export c_SelectProfile
func c_SelectProfile(onion_ptr *C.char, onion_len C.int) *C.char {
	return C.CString(SelectProfile(C.GoStringN(onion_ptr, onion_len)))
}

func SelectProfile(onion string) string {
	log.Infof("Select Profile: %v", onion)
	contactEventsQueue = event.NewQueue()
	application.GetEventBus(onion).Subscribe(event.PeerStateChange, contactEventsQueue)
	return ""
}

//export c_ContactEvents
func c_ContactEvents() *C.char {
	return C.CString(ContactEvents())
}

func ContactEvents() string {
	select {
	case myevent := <- contactEventsQueue.OutChan():
		return fmt.Sprintf("%v", myevent)
	default:
		return ""
	}
}

//export c_NumMessages
func c_NumMessages(profile_ptr *C.char, profile_len C.int, handle_ptr *C.char, handle_len C.int) (n C.int) {
	profile := C.GoStringN(profile_ptr, profile_len)
	handle := C.GoStringN(handle_ptr, handle_len)
	return C.int(NumMessages(profile, handle))
}

func NumMessages(profile, handle string) (n int) {
	n = len(application.GetPeer(profile).GetContact(handle).Timeline.Messages)
	log.Infof("NumMessagse(%s, %s) = %d", profile, handle, n)
	return
}

//export c_GetMessage
func c_GetMessage(profile_ptr *C.char, profile_len C.int, handle_ptr *C.char, handle_len C.int, message_index C.int) *C.char {
	profile := C.GoStringN(profile_ptr, profile_len)
	handle := C.GoStringN(handle_ptr, handle_len)
	return C.CString(GetMessage(profile, handle, int(message_index)))
}

func GetMessage(profile, handle string, message_index int) string {
	message := application.GetPeer(profile).GetContact(handle).Timeline.Messages[message_index]
	bytes,_ := json.Marshal(message)
	log.Infof("GetMessage(%s, %s, %d) = %s", profile, handle, message_index, string(bytes))
	return string(bytes)
}

// Leave as is, needed by ffi
//func main() {}