rough weather fetcher

bot/bot.go

@@ -4,6 +4,7 @@ package bot
 import (
 	"fmt"
 	"github.com/mattermost/mattermost-server/v5/model"
+	"net/http"
 	"os"
 	"os/signal"
 	"regexp"
@@ -71,7 +72,7 @@ func (b *Bot) Main() int {
 
 	// Lets create a bot channel for logging debug messages into
 	b.CreateBotDebuggingChannelIfNeeded()
-	msg := fmt.Sprintf("_**%s** has started up_\n\nrunning on version %s", b.BotName, b.Version)
+	msg := fmt.Sprintf("_**%s** (version `%s`) is now starting up", b.BotName, b.Version)
 	b.SendMsgToDebuggingChannel(msg, "")
 
 	// Lets start listening to some channels via the websocket!
@@ -229,6 +230,38 @@ func (b *Bot) Shutdown() {
 	syscall.Kill(syscall.Getpid(), syscall.SIGINT)
 }
 
+func (b *Bot) HandleWeatherRequest(channelid string, postid string, message string) {
+	msg := fmt.Sprintf("weather request received: `%s`", message)
+	b.SendMsgToChannel(msg, postid, channelid)
+
+	r := regexp.MustCompile(`metar\s+([A-Za-z]{4})`)
+	loc := r.FindString(message)
+	if loc == "" {
+		b.SendMsgToChannel("error, sorry", postid, channelid)
+	}
+
+	token := os.Getenv("METAR_API_TOKEN")
+	url := fmt.Sprintf("https://avwx.rest/api/metar/%s?options=&airport=true&reporting=true&format=json&onfail=cache", loc)
+
+	msg = fmt.Sprintf("calculated url: `%s`", url)
+	b.SendMsgToChannel(msg, postid, channelid)
+
+	client := http.Client{
+		Timeout: 5 * time.Second,
+	}
+	req, err := http.NewRequest("GET", url, nil)
+	req.Header.Add("Authorization", `Token `+token)
+	resp, err := client.Do(req)
+
+	if err != nil {
+		b.SendMsgToChannel(fmt.Sprintf("weather fetch error: %s", err), postid, channelid)
+		return
+	}
+
+	b.SendMsgToChannel(fmt.Sprintf("weather %s: %s", loc, resp), postid, channelid)
+
+}
+
 func (b *Bot) HandleMsgFromChannel(event *model.WebSocketEvent) {
 
 	post := model.PostFromJson(strings.NewReader(event.Data["post"].(string)))
@@ -237,6 +270,10 @@ func (b *Bot) HandleMsgFromChannel(event *model.WebSocketEvent) {
 	}
 
 	//pretty.Print(post)
+	if matched, _ := regexp.MatchString(`(?:^|\W)metar(?:$|\W)`, post.Message); matched {
+		b.HandleWeatherRequest(post.ChannelId, post.Id, post.Message)
+		return
+	}
 
 	if matched, _ := regexp.MatchString(`(?:^|\W)alive(?:$|\W)`, post.Message); matched {
 		b.SendMsgToChannel("yes I'm running", post.Id, post.ChannelId)