2020-05-14 20:48:41 +00:00
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package sms
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import (
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2020-05-15 14:22:23 +00:00
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"fmt"
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"net/http"
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"regexp"
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"strings"
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twilio "github.com/kevinburke/twilio-go"
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"github.com/rs/zerolog/log"
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2020-05-14 20:48:41 +00:00
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"github.com/velour/catbase/bot"
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"github.com/velour/catbase/bot/msg"
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"github.com/velour/catbase/config"
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)
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2020-05-15 14:22:23 +00:00
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var plugin *SMSPlugin
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2020-05-14 20:48:41 +00:00
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type SMSPlugin struct {
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b bot.Bot
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c *config.Config
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}
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func New(b bot.Bot) *SMSPlugin {
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if plugin != nil {
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return plugin
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}
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plugin = &SMSPlugin{
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b: b,
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c: b.Config(),
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}
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plugin.setup()
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plugin.registerWeb()
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b.Register(plugin, bot.Message, plugin.message)
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b.Register(plugin, bot.Help, plugin.help)
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return plugin
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}
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func (p *SMSPlugin) checkNumber(num string) (string, error) {
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expectedLen := 10
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if len(num) != expectedLen {
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return num, fmt.Errorf("invalid number length: %d, expected %d", len(num), expectedLen)
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}
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return num, nil
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}
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2020-05-17 14:49:38 +00:00
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var regRegex = regexp.MustCompile(`(?i)my sms number is (\d+)`)
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var sendRegex = regexp.MustCompile(`(?i)send sms to\s(?P<name>\S+)\s(?P<body>.+)`)
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// Send will send a text to a registered user, who
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func (p *SMSPlugin) Send(who, message string) error {
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num, err := p.get(who)
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if err != nil {
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return fmt.Errorf("unknown user: %s: %w", who, err)
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}
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sid := p.c.Get("TWILIOSID", "")
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token := p.c.Get("TWILIOTOKEN", "")
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myNum := p.c.Get("TWILIONUMBER", "")
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client := twilio.NewClient(sid, token, nil)
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_, err = client.Messages.SendMessage(myNum, num, message, nil)
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return err
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}
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func (p *SMSPlugin) message(c bot.Connector, kind bot.Kind, message msg.Message, args ...interface{}) bool {
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ch, chName := message.Channel, message.ChannelName
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body := strings.TrimSpace(message.Body)
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who := message.User.Name
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log.Debug().Bytes("body", []byte(body)).Msgf("body: '%s', match: %v, %#v", body, sendRegex.MatchString(body), sendRegex.FindStringSubmatch(body))
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if strings.ToLower(body) == "delete my sms" {
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if err := p.delete(who); err != nil {
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p.b.Send(c, bot.Message, ch, "Something went wrong.")
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return true
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}
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p.b.Send(c, bot.Message, ch, "Okay.")
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return true
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}
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2020-05-17 14:49:38 +00:00
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if sendRegex.MatchString(body) {
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subs := sendRegex.FindStringSubmatch(body)
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if len(subs) != 3 {
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("I didn't send the message. Your request makes no sense."))
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return true
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}
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user, body := subs[1], fmt.Sprintf("#%s: %s", chName, subs[2])
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err := p.Send(user, body)
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if err != nil {
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("I didn't send the message, %s", err))
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return true
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}
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p.b.Send(c, bot.Message, ch, "I sent a message to them.")
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return true
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}
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2020-05-17 14:49:38 +00:00
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if regRegex.MatchString(body) {
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subs := regRegex.FindStringSubmatch(body)
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if subs == nil || len(subs) != 2 {
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("if you're trying to register a number, give me a "+
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"message of the format: `%s`", regRegex))
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return true
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}
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num, err := p.checkNumber(subs[1])
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if err != nil {
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("That number didn't make sense to me: %s", err))
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return true
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}
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me := p.b.WhoAmI()
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m := fmt.Sprintf("Hello from %s. You are registered for reminders and you can chat with the channel "+
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"by talking to this number", me)
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err = p.add(who, num)
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if err != nil {
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log.Error().Err(err).Msgf("error adding user")
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("I didn't send the message, %s", err))
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return true
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}
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err = p.Send(who, m)
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if err != nil {
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log.Error().Err(err).Msgf("error sending to user")
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if err := p.delete(who); err != nil {
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log.Error().Err(err).Msgf("error deleting user")
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}
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p.b.Send(c, bot.Message, ch, fmt.Sprintf("I didn't send the message, %s", err))
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return true
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}
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p.b.Send(c, bot.Message, ch, "I sent a message to them.")
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return true
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}
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return false
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}
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func (p *SMSPlugin) help(c bot.Connector, kind bot.Kind, message msg.Message, args ...interface{}) bool {
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ch := message.Channel
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m := fmt.Sprintf("You can register your number with: `%s`", regRegex)
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m += fmt.Sprintf("\nYou can send a message to a user with: `%s`", sendRegex)
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m += "\nYou can deregister with: `delete my sms`"
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m += fmt.Sprintf("\nAll messages sent to %s will come to the channel.",
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p.c.Get("TWILIONUMBER", "unknown"))
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m += "\nAll reminders with registered users will be sent to their SMS number."
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p.b.Send(c, bot.Message, ch, m)
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return true
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}
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func (p *SMSPlugin) registerWeb() {
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http.HandleFunc("/sms/new", p.receive)
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}
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func (p *SMSPlugin) receive(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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w.WriteHeader(405)
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fmt.Fprintf(w, "Incorrect HTTP method")
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return
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}
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if err := r.ParseForm(); err != nil {
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log.Error().Err(err).Msgf("could not parse incoming SMS")
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return
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}
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body := r.PostFormValue("Body")
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number := strings.TrimPrefix(r.PostFormValue("From"), "+1")
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from, err := p.getByNumber(number)
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if err != nil {
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log.Debug().Err(err).Msgf("could not find user")
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from = number
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}
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m := fmt.Sprintf("SMS From %s: %s", from, body)
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chs := p.c.GetArray("channels", []string{})
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log.Debug().Msgf("%s to %v", m, chs)
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for _, ch := range chs {
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p.b.Send(p.b.DefaultConnector(), bot.Message, ch, m)
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}
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}
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func (p *SMSPlugin) add(who, num string) error {
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tx, err := p.b.DB().Beginx()
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if err != nil {
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return err
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}
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_, err = tx.Exec(`insert or replace into sms (who, num) values (?, ?)`, who, num)
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if err != nil {
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return err
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}
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err = tx.Commit()
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return err
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}
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func (p *SMSPlugin) delete(who string) error {
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tx, err := p.b.DB().Beginx()
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if err != nil {
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return err
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}
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_, err = tx.Exec(`delete from sms where who=?`, who)
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if err != nil {
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return err
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}
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err = tx.Commit()
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return err
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}
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func (p *SMSPlugin) get(who string) (string, error) {
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num := ""
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err := p.b.DB().Get(&num, `select num from sms where who=?`, who)
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return num, err
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}
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func (p *SMSPlugin) getByNumber(num string) (string, error) {
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who := ""
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err := p.b.DB().Get(&who, `select who from sms where num=?`, num)
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return who, err
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}
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func (p *SMSPlugin) setup() {
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_, err := p.b.DB().Exec(`create table if not exists sms (
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who string primary key,
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num string
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)`)
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if err != nil {
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log.Fatal().Err(err).Msgf("could not create sms table")
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}
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2020-05-15 14:22:23 +00:00
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}
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