Feat(Initial): Initial Go codebase

backend/internal/telegrampackage/main.go

@@ -0,0 +1,52 @@
+package telegrampackage
+
+import (
+	"fmt"
+	"math/rand"
+	"strings"
+	"time"
+
+	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
+	"gorm.io/gorm"
+)
+
+type TelegramHandlerFunction func(shortCode string, text string) (handled bool, responseText *string)
+
+type Env struct {
+	DB               *gorm.DB
+	TelegramAPIKey   string
+	HandlerFunctions []TelegramHandlerFunction
+}
+
+func NewEnv(db *gorm.DB, telegramAPIKey string, handlerFunctions []TelegramHandlerFunction) *Env {
+	var env Env
+	env.DB = db
+	env.TelegramAPIKey = telegramAPIKey
+	env.HandlerFunctions = handlerFunctions
+	// Example handler function
+	_ = env.telegramHandlerExample
+
+	// Seed random
+	rand.Seed(time.Now().UnixNano())
+
+	// Start listening job
+	go env.TelegramListenAndGen()
+
+	return &env
+}
+
+func (env *Env) AddTelegramHandlerFunc(handlerFunction TelegramHandlerFunction) {
+	env.HandlerFunctions = append(env.HandlerFunctions, handlerFunction)
+}
+
+// Not used normally. Shown here as example only
+func (env *Env) telegramHandlerExample(shortCode string, text string) (bool, *string) {
+	commandSplitted := ParseTelegramBotCommand(text)
+	if len(commandSplitted) > 0 && commandSplitted[0] == "/command" {
+		responseText := fmt.Sprintf("Your short code is %s.\n\nYour message is %s", shortCode, text)
+		responseText = responseText + fmt.Sprintf("\n\nYour parameters are: %s", strings.Join(commandSplitted[1:], "\n - "))
+		responseText = "<code>" + tgbotapi.EscapeText("HTML", responseText) + "</code>"
+		return true, &responseText
+	}
+	return false, nil
+}