forked from jshiffer/go-xmpp
336 lines
9.0 KiB
Go
336 lines
9.0 KiB
Go
package main
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/*
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xmpp_chat_client is a demo client that connect on an XMPP server to chat with other members
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*/
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import (
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"context"
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"encoding/xml"
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"errors"
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"flag"
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"fmt"
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"github.com/awesome-gocui/gocui"
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"github.com/spf13/pflag"
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"github.com/spf13/viper"
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"gosrc.io/xmpp"
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"gosrc.io/xmpp/stanza"
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"log"
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"os"
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"path"
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"strconv"
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"strings"
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"time"
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)
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const (
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infoFormat = "====== "
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// Default configuration
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defaultConfigFilePath = "./"
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configFileName = "config"
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configType = "yaml"
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logStanzasOn = "logger_on"
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logFilePath = "logfile_path"
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// Keys in config
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serverAddressKey = "full_address"
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clientJid = "jid"
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clientPass = "pass"
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configContactSep = ";"
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)
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var (
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CorrespChan = make(chan string, 1)
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textChan = make(chan string, 5)
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rawTextChan = make(chan string, 5)
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killChan = make(chan error, 1)
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errChan = make(chan error)
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rosterChan = make(chan struct{})
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logger *log.Logger
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disconnectErr = errors.New("disconnecting client")
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)
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type config struct {
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Server map[string]string `mapstructure:"server"`
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Client map[string]string `mapstructure:"client"`
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Contacts string `string:"contact"`
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LogStanzas map[string]string `mapstructure:"logstanzas"`
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}
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func main() {
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// ============================================================
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// Parse the flag with the config directory path as argument
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flag.String("c", defaultConfigFilePath, "Provide a path to the directory that contains the configuration"+
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" file you want to use. Config file should be named \"config\" and be of YAML format..")
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pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
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pflag.Parse()
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// ==========================
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// Read configuration
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c := readConfig()
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//================================
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// Setup logger
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on, err := strconv.ParseBool(c.LogStanzas[logStanzasOn])
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if err != nil {
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log.Panicln(err)
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}
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if on {
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f, err := os.OpenFile(path.Join(c.LogStanzas[logFilePath], "logs.txt"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
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if err != nil {
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log.Panicln(err)
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}
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logger = log.New(f, "", log.Lshortfile|log.Ldate|log.Ltime)
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logger.SetOutput(f)
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defer f.Close()
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}
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// ==========================
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// Create TUI
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g, err := gocui.NewGui(gocui.OutputNormal, true)
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if err != nil {
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log.Panicln(err)
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}
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defer g.Close()
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g.Highlight = true
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g.Cursor = true
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g.SelFgColor = gocui.ColorGreen
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g.SetManagerFunc(layout)
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setKeyBindings(g)
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// ==========================
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// Run TUI
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go func() {
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errChan <- g.MainLoop()
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}()
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// ==========================
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// Start XMPP client
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go startClient(g, c)
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select {
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case err := <-errChan:
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if err == gocui.ErrQuit {
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log.Println("Closing client.")
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} else {
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log.Panicln(err)
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}
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}
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}
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func startClient(g *gocui.Gui, config *config) {
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// ==========================
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// Client setup
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clientCfg := xmpp.Config{
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TransportConfiguration: xmpp.TransportConfiguration{
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Address: config.Server[serverAddressKey],
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},
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Jid: config.Client[clientJid],
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Credential: xmpp.Password(config.Client[clientPass]),
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Insecure: true}
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var client *xmpp.Client
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var err error
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router := xmpp.NewRouter()
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handlerWithGui := func(_ xmpp.Sender, p stanza.Packet) {
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msg, ok := p.(stanza.Message)
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if logger != nil {
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logger.Println(msg)
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}
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v, err := g.View(chatLogWindow)
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if !ok {
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fmt.Fprintf(v, "%sIgnoring packet: %T\n", infoFormat, p)
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return
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}
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if err != nil {
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return
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}
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g.Update(func(g *gocui.Gui) error {
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if msg.Error.Code != 0 {
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_, err := fmt.Fprintf(v, "Error from server : %s : %s \n", msg.Error.Reason, msg.XMLName.Space)
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return err
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}
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if len(strings.TrimSpace(msg.Body)) != 0 {
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_, err := fmt.Fprintf(v, "%s : %s \n", msg.From, msg.Body)
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return err
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}
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return nil
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})
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}
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router.HandleFunc("message", handlerWithGui)
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if client, err = xmpp.NewClient(clientCfg, router, errorHandler); err != nil {
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log.Panicln(fmt.Sprintf("Could not create a new client ! %s", err))
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}
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// ==========================
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// Client connection
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if err = client.Connect(); err != nil {
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msg := fmt.Sprintf("%sXMPP connection failed: %s", infoFormat, err)
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g.Update(func(g *gocui.Gui) error {
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v, err := g.View(chatLogWindow)
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fmt.Fprintf(v, msg)
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return err
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})
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fmt.Println("Failed to connect to server. Exiting...")
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errChan <- servConnFail
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return
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}
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// ==========================
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// Start working
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updateRosterFromConfig(g, config)
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// Sending the default contact in a channel. Default value is the first contact in the list from the config.
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viewState.currentContact = strings.Split(config.Contacts, configContactSep)[0]
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// Informing user of the default contact
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clw, _ := g.View(chatLogWindow)
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fmt.Fprintf(clw, infoFormat+"Now sending messages to "+viewState.currentContact+" in a private conversation\n")
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CorrespChan <- viewState.currentContact
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startMessaging(client, config, g)
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}
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func startMessaging(client xmpp.Sender, config *config, g *gocui.Gui) {
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var text string
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var correspondent string
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for {
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select {
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case err := <-killChan:
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if err == disconnectErr {
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sc := client.(xmpp.StreamClient)
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sc.Disconnect()
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} else {
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logger.Println(err)
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}
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return
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case text = <-textChan:
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reply := stanza.Message{Attrs: stanza.Attrs{To: correspondent, From: config.Client[clientJid], Type: stanza.MessageTypeChat}, Body: text}
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if logger != nil {
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raw, _ := xml.Marshal(reply)
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logger.Println(string(raw))
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}
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err := client.Send(reply)
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if err != nil {
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fmt.Printf("There was a problem sending the message : %v", reply)
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return
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}
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case text = <-rawTextChan:
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if logger != nil {
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logger.Println(text)
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}
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err := client.SendRaw(text)
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if err != nil {
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fmt.Printf("There was a problem sending the message : %v", text)
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return
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}
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case crrsp := <-CorrespChan:
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correspondent = crrsp
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case <-rosterChan:
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askForRoster(client, g, config)
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}
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}
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}
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// Only reads and parses the configuration
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func readConfig() *config {
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viper.SetConfigName(configFileName) // name of config file (without extension)
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viper.BindPFlags(pflag.CommandLine)
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viper.AddConfigPath(viper.GetString("c")) // path to look for the config file in
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err := viper.ReadInConfig() // Find and read the config file
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if err := viper.ReadInConfig(); err != nil {
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if _, ok := err.(viper.ConfigFileNotFoundError); ok {
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log.Fatalf("%s %s", err, "Please make sure you give a path to the directory of the config and not to the config itself.")
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} else {
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log.Panicln(err)
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}
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}
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viper.SetConfigType(configType)
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var config config
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err = viper.Unmarshal(&config)
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if err != nil {
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panic(fmt.Errorf("Unable to decode Config: %s \n", err))
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}
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// Check if we have contacts to message
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if len(strings.TrimSpace(config.Contacts)) == 0 {
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log.Panicln("You appear to have no contacts to message !")
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}
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// Check logging
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config.LogStanzas[logFilePath] = path.Clean(config.LogStanzas[logFilePath])
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on, err := strconv.ParseBool(config.LogStanzas[logStanzasOn])
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if err != nil {
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log.Panicln(err)
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}
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if d, e := isDirectory(config.LogStanzas[logFilePath]); (e != nil || !d) && on {
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log.Panicln("The log file path could not be found or is not a directory.")
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}
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return &config
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}
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// If an error occurs, this is used to kill the client
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func errorHandler(err error) {
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killChan <- err
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}
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// Read the client roster from the config. This does not check with the server that the roster is correct.
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// If user tries to send a message to someone not registered with the server, the server will return an error.
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func updateRosterFromConfig(g *gocui.Gui, config *config) {
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viewState.contacts = append(strings.Split(config.Contacts, configContactSep), backFromContacts)
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}
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// Updates the menu panel of the view with the current user's roster, by asking the server.
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func askForRoster(client xmpp.Sender, g *gocui.Gui, config *config) {
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// Craft a roster request
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req := stanza.NewIQ(stanza.Attrs{From: config.Client[clientJid], Type: stanza.IQTypeGet})
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req.RosterItems()
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if logger != nil {
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m, _ := xml.Marshal(req)
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logger.Println(string(m))
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}
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ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
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// Send the roster request to the server
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c, err := client.SendIQ(ctx, req)
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if err != nil {
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logger.Panicln(err)
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}
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// Sending a IQ has a channel spawned to process the response once we receive it.
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// In order not to block the client, we spawn a goroutine to update the TUI once the server has responded.
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go func() {
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serverResp := <-c
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if logger != nil {
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m, _ := xml.Marshal(serverResp)
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logger.Println(string(m))
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}
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// Update contacts with the response from the server
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chlw, _ := g.View(chatLogWindow)
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if rosterItems, ok := serverResp.Payload.(*stanza.RosterItems); ok {
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viewState.contacts = []string{}
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for _, item := range rosterItems.Items {
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viewState.contacts = append(viewState.contacts, item.Jid)
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}
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viewState.contacts = append(viewState.contacts, backFromContacts)
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fmt.Fprintln(chlw, infoFormat+"Contacts list updated !")
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return
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}
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fmt.Fprintln(chlw, infoFormat+"Failed to update contact list !")
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}()
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}
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func isDirectory(path string) (bool, error) {
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fileInfo, err := os.Stat(path)
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if err != nil {
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return false, err
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}
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return fileInfo.IsDir(), err
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}
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