Implement SendTextToTelegram function

.env.template

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+TELEGRAM_BOT_TOKEN=
+TELEGRAM_CHAT_ID=

.gitignore

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+.env

go.mod

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+module gitlab.com/ekzyis/stackernews_rss-to-tg
+
+go 1.20
+
+require (
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/namsral/flag v1.7.4-pre // indirect
+)

go.sum

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+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/namsral/flag v1.7.4-pre h1:b2ScHhoCUkbsq0d2C15Mv+VU8bl8hAXV8arnWiOHNZs=
+github.com/namsral/flag v1.7.4-pre/go.mod h1:OXldTctbM6SWH1K899kPZcf65KxJiD7MsceFUpB5yDo=

main.go

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+package main
+
+func main() {
+}

tg.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/joho/godotenv"
+	"github.com/namsral/flag"
+)
+
+var (
+	ChatId   int
+	BotToken string
+)
+
+func init() {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("error loading .env file")
+	}
+	flag.IntVar(&ChatId, "TELEGRAM_CHAT_ID", 0, "Chat id of telegram channel")
+	flag.StringVar(&BotToken, "TELEGRAM_BOT_TOKEN", "", "Telegram bot token")
+	flag.Parse()
+	if ChatId == 0 {
+		log.Fatal("TELEGRAM_CHAT_ID not set")
+	}
+	if BotToken == "" {
+		log.Fatal("TELEGRAM_BOT_TOKEN not set")
+	}
+}
+
+func SendTextToTelegram(text string) {
+	url := fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage?chat_id=%d&text=%s", BotToken, ChatId, text)
+	resp, err := http.Get(url)
+	if err != nil {
+		err = fmt.Errorf("error during GET %s: %w", url, err)
+		log.Println(err)
+		return
+	}
+	defer resp.Body.Close()
+	log.Printf("GET %s: %d\n", url, resp.StatusCode)
+}