welcome.go

package welcome

import (
	"fmt"

	"github.com/nlopes/slack"
	"github.com/ubclaunchpad/rocket/bot"
	"github.com/ubclaunchpad/rocket/cmd"
)

// Plugin stores the bot that is used to access the Slack API.
type Plugin struct {
	Bot *bot.Bot
}

// New reutrns a new instance of the WelcomePlugin
func New(b *bot.Bot) *Plugin {
	return &Plugin{
		Bot: b,
	}
}

// Start starts the welcome plugin.
func (wp *Plugin) Start() error {
	wp.Bot.Log.Info("Running WelcomePlugin")
	return nil
}

// Commands returns an empty list of commands, because this plugin has no
// commands.
func (wp *Plugin) Commands() []*cmd.Command {
	return []*cmd.Command{}
}

// EventHandlers returns a map from event type to event handler.
func (wp *Plugin) EventHandlers() map[string]bot.EventHandler {
	return map[string]bot.EventHandler{
		"team_join": wp.handleTeamJoin,
	}
}

// handleTeamJoin welcomes a user to our Slack when they join be messaging
// them in the general channel.
func (wp *Plugin) handleTeamJoin(evt slack.RTMEvent) {
	user := evt.Data.(*slack.TeamJoinEvent).User
	userMention := cmd.ToMention(user.ID)

	// Post a welcome message in #general
	msg := fmt.Sprintf("Welcome to the team, %s! :rocket:", userMention)
	noParams := slack.PostMessageParameters{}
	wp.Bot.API.PostMessage("general", msg, noParams)

	// Send the user a private message asking them to update their info
	msg = fmt.Sprintf("Hi %s, please update your profile information with "+
		"the `set` command:\n"+
		"`@rocket set github={myGitHubUsername} position={a fun position} "+
		"major={myUBCMajor}`\n"+
		"If you need help using Rocket commands, try `@rocket help`", userMention)
	_, _, channelID, err := wp.Bot.API.OpenIMChannel(user.ID)
	if err != nil {
		// If this fails it's not the end of the world - just log an error
		wp.Bot.Log.WithError(err).Errorf(
			"failed to send %s a private message", user.Name)
		return
	}
	wp.Bot.API.PostMessage(channelID, msg, noParams)

}