a simple slack weather bot

it’s been really hot in Los Angeles recently, and i realised i was switching back to my web browser from the Slack app to find out the current temperature downstairs an awful lot before leaving the office.

i realised that a /weather command would far more efficient. say hello to slack-weather-bot.

a simple golang backend that take a request for /weather?zip=NNNNN and then posts a quick one-liner of current conditions back to you on Slack. enjoy.

https://github.com/rickt/slack-weather-bot

package slackweatherbot
import (
owm "github.com/briandowns/openweathermap"
"golang.org/x/net/context"
"google.golang.org/appengine"
"google.golang.org/appengine/log"
"google.golang.org/appengine/urlfetch"
"net/http"
"os"
"strconv"
"text/template"
)
const (
weatherTemplate = `It's currently {{.Main.Temp}} °F ({{range .Weather}} {{.Description}} {{end}}) `
)
// get the current weather conditions from openweather
func getCurrent(zip int, units, lang string, ctx context.Context) *owm.CurrentWeatherData {
// create a urlfetch http client because we're in appengine and can't use net/http default
cl := urlfetch.Client(ctx)
// establish connection to openweather API
cc, err := owm.NewCurrent(units, lang, owm.WithHttpClient(cl))
if err != nil {
log.Errorf(ctx, "ERROR handler() during owm.NewCurrent: %s", err)
return nil
}
cc.CurrentByZip(zip, "US")
return cc
}
// redirect requests to / to /weather
func handler_redirect(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "/weather", 302)
}
// handle requests to /weather
// currently supports parameter of ?zip=NNNNNN or no zip parameter, in which case DEFAULT_ZIP is used
func handler_weather(w http.ResponseWriter, r *http.Request) {
// create an appengine context so we can log
ctx := appengine.NewContext(r)
// check the parameters
zip := r.URL.Query().Get("zip")
switch zip {
// if no zip parameter given, get the DEFAULT_ZIP from our env vars
case "":
zip = os.Getenv("DEFAULT_ZIP")
}
// convert the zip string to an int because that's what openweather wants
var zipint int
zipint, err := strconv.Atoi(zip)
if err != nil {
log.Errorf(ctx, "ERROR handler_weather() zip conversion problem: %s", err)
return
}
// get the current weather data
wd := getCurrent(zipint, os.Getenv("UNITS"), os.Getenv("LANG"), ctx)
// make the template
tmpl, err := template.New("weather").Parse(weatherTemplate)
if err != nil {
log.Errorf(ctx, "ERROR handler_weather() during template.New: %s", err)
return
}
// execute the template
err = tmpl.Execute(w, wd)
if err != nil {
log.Errorf(ctx, "ERROR handler_weather() during template.Execute: %s", err)
return
}
// we're done here
return
}
// because we're in appengine, there is no main()
func init() {
http.HandleFunc("/", handler_redirect)
http.HandleFunc("/weather", handler_weather)
}
// EOF

view raw
slackweatherbot.go
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Slack Translation Bot

stable release of Slack Translator Bot.

http://github.com/rickt/slack-translator-bot

what is Slack Translator Bot? the [as-is demo] code gets you get a couple of Slack /slash commands that let you translate from English to Japanese, and vice-versa.

below screenshot shows example response to a Slack user wanting to translate “the rain in spain falls mainly on the plane” by typing:

image

within slack:

image

TL;DR/HOW-TO

  • you get a google translate api key
  • you deploy a go backend app to Google Appengine that responds to
  • a couple of custom Slack /slash commands that you create in Slack
  • you profit

http://gist-it.appspot.com/https://github.com/rickt/slack-translator-bot/blob/master/slacktranslatorbot.go

rickt/slack-translator-bot

Slack Team Directory Bot

stable release of Slack Team Directory Bot.

http://github.com/rickt/slack-team-directory-bot

what is Slack Team Directory Bot? you get a Slack /slash command that lets you search your Slack Team Directory quick as a flash.

below screenshot shows example response to a Slack trying to find someone in your accounting department by typing:

image

within slack:

image

TL;DR/HOW-TO

  • you deploy a go backend app to Google Appengine that responds to…
  • a custom Slack /slash command that you create in Slack

http://gist-it.appspot.com/http://github.com/rickt/slack-team-directory-bot/blob/master/slackteamdirectorybot.go
rickt/slack-team-directory-bot

Slack Timebot

stable release of Slack Timebot.

https://github.com/rickt/timebot-simple

what is Slack Timebot? at work, i very often have to know what time it is in the following regions:

  • PST
  • UTC
  • JST

so i wrote a mini go backend app that i threw into a free Google Appengine app and so now i can get the time instantly by using any of these new Slack /slash commands:

  • /time (PST)
  • /utctime (UTC)
  • /japantime (JST)

TL;DR/HOW-TO

  • you deploy a go backend app to Google Appengine that responds to
  • a couple of custom Slack /slash commands that you create in Slack

http://gist-it.appspot.com/http://github.com/rickt/timebot-simple/blob/master/timebot-simple.go