otterbot.go

/*

otterbot - Illustrative Slack bot in Go

Copyright (c) 2015 RapidLoop

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

package main

import (
	"fmt"
	"log"
	"os"
	"strconv"
	"strings"
)

func main() {
	if len(os.Args) != 2 {
		fmt.Fprintf(os.Stderr, "usage: otterbot slack-bot-token\n")
		os.Exit(1)
	}

	// start a websocket-based Real Time API session
	ws, id := slackConnect(os.Args[1])
	fmt.Println("otterbot ready, ^C exits")

	for {
		// read each incoming message
		m, err := getMessage(ws)
		if err != nil {
			log.Fatal(err)
		}

		// see if we're mentioned
		if m.Type == "message" && strings.HasPrefix(m.Text, "<@"+id+">") {
			// if so try to parse if
			parts := strings.Fields(m.Text)
			if len(parts) == 3 && parts[1] == "info" {
				// looks good, get the quote and reply with the result
				go func(m Message) {
					m.Text = getInfo(parts[2])
					postMessage(ws, m)
				}(m)
				// NOTE: the Message object is copied, this is intentional
			} else {
				// huh?
				m.Text = fmt.Sprintf("sorry, that does not compute\n")
				postMessage(ws, m)
			}
		}
	}
}

// Get the quote via Yahoo. You should replace this method to something
// relevant to your team!
/*func getInfo(sym string) string {
	sym = strings.ToUpper(sym)
	url := fmt.Sprintf("http://download.finance.yahoo.com/d/quotes.csv?s=%s&f=nsl1op&e=.csv", sym)
	resp, err := http.Get(url)
	if err != nil {
		return fmt.Sprintf("error: %v", err)
	}
	rows, err := csv.NewReader(resp.Body).ReadAll()
	if err != nil {
		return fmt.Sprintf("error: %v", err)
	}
	if len(rows) >= 1 && len(rows[0]) == 5 {
		return fmt.Sprintf("%s (%s) is trading at $%s", rows[0][0], rows[0][1], rows[0][2])
	}
	return fmt.Sprintf("unknown response format (symbol was \"%s\")", sym)
}
*/

// getting info from: http://www.otter-world.com/sea-otter/
func getInfo(topic string) string {
	checkTopics := strings.ToLower(topic)

	switch checkTopics {
	case "types":
		otterSpecies := []string{
			"Sea Otter",
			"African Clawless Otter",
			"European Otter",
			"Giant Otter",
			"Northern River Otter",
		}
		return strings.Join(otterSpecies, ", ")
	case "seaotter":
		return "The Sea Otter has a small round face that is absolutely adorable. Just about everyone that seems them has a comment in that regard to make. They can be up to 100 pounds so they are the heaviest of all species."
	case "montereybay":
		loc := location{36.8007, 121.9473}
		return "Monterey Bay is located at " + strconv.FormatFloat(loc.n, 'f', -1, 64) + "° N, " + strconv.FormatFloat(loc.w, 'f', -1, 64) + "° W"
	default:
		return "current options are: \"info types\" or \"info SeaOtter\" or \"MontereyBay\"!"
	}
}

type location struct {
	n, w float64
}