Initial Commit

Signed-off-by: Sid Sun <[email protected]>

.gitignore

@@ -0,0 +1,8 @@
+out
+.idea/
+.vscode
+*.env
+*.iml
+*.DS_Store
+vendor/
+*.out

Makefile

@@ -0,0 +1,13 @@
+ALL_PACKAGES=$(shell go list ./... | grep -v "vendor")
+
+fmt:
+	go fmt $(ALL_PACKAGES)
+
+vet:
+	go vet $(ALL_PACKAGES)
+
+tidy:
+	go mod tidy
+
+serve: fmt vet
+	env $(cat dev.env | xargs) go run cmd/*.go

cmd/config/botConfig.go

@@ -0,0 +1,11 @@
+package config
+
+// BotConfig contains the config for creating a new bot
+type BotConfig struct {
+	tkn string
+}
+
+// Token returns the bot token
+func (b BotConfig) Token() string {
+	return b.tkn
+}

cmd/config/config.go

@@ -0,0 +1,26 @@
+package config
+
+import (
+	"os"
+)
+
+// Config contains all the neccessary configurations
+type Config struct {
+	Bot         BotConfig
+	environment string
+}
+
+// GetEnv returns the current developemnt environment
+func (c Config) GetEnv() string {
+	return c.environment
+}
+
+// Load reads all config from env to config
+func Load() Config {
+	return Config{
+		environment: os.Getenv("APP_ENV"),
+		Bot: BotConfig{
+			tkn: os.Getenv("API_TOKEN"),
+		},
+	}
+}

cmd/const.go

@@ -0,0 +1,5 @@
+package main
+
+const (
+	dev = "dev"
+)

cmd/logger.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"go.uber.org/zap"
+)
+
+var logger *zap.Logger
+
+func initLogger(env string) {
+	var err error
+
+	if env == dev {
+		logger, err = zap.NewDevelopmentConfig().Build()
+	} else {
+		logger, err = zap.NewProductionConfig().Build()
+	}
+
+	if err != nil {
+		panic(err)
+	}
+}

cmd/main.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"github.com/sid-sun/sample-bot/cmd/config"
+	"github.com/sid-sun/sample-bot/pkg/bot"
+)
+
+func main() {
+	cfg := config.Load()
+	initLogger(cfg.GetEnv())
+	bot.StartBot(cfg, logger)
+}

go.mod

@@ -0,0 +1,9 @@
+module github.com/sid-sun/sample-bot
+
+go 1.13
+
+require (
+	github.com/go-telegram-bot-api/telegram-bot-api v4.6.4+incompatible
+	github.com/technoweenie/multipartstreamer v1.0.1 // indirect
+	go.uber.org/zap v1.15.0
+)

go.sum

@@ -0,0 +1,59 @@
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pkg/bot/handlers/repeat/const.go

@@ -0,0 +1,3 @@
+package repeat
+
+const handler = "Repeat"

pkg/bot/handlers/repeat/repeat.go

@@ -0,0 +1,22 @@
+package repeat
+
+import (
+	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
+	"go.uber.org/zap"
+)
+
+// Handler handles all repeat requests
+func Handler(bot *tgbotapi.BotAPI, update tgbotapi.Update, logger *zap.Logger) {
+	logger.Info("[Repeat] [Attempt]")
+
+	msg := tgbotapi.NewMessage(update.Message.Chat.ID, update.Message.Text)
+	msg.ReplyToMessageID = update.Message.MessageID
+
+	_, err := bot.Send(msg)
+	if err != nil {
+		logger.Sugar().Errorf("[%s] [%s] %s", handler, "Send", err.Error())
+		return
+	}
+
+	logger.Info("[Repeat] [Success]")
+}

pkg/bot/router/router.go

@@ -0,0 +1,55 @@
+package router
+
+import (
+	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
+	"github.com/sid-sun/sample-bot/cmd/config"
+	"github.com/sid-sun/sample-bot/pkg/bot/handlers/repeat"
+	"go.uber.org/zap"
+)
+
+type updates struct {
+	ch     tgbotapi.UpdatesChannel
+	bot    *tgbotapi.BotAPI
+	logger *zap.Logger
+}
+
+// ListenAndServe starts listens on the update channel and handles routing the update to handlers
+func (u updates) ListenAndServe() {
+	for update := range u.ch {
+		update := update
+		go func() {
+			if update.Message == nil {
+				return
+			}
+			repeat.Handler(u.bot, update, u.logger)
+		}()
+	}
+}
+
+type bot struct {
+	bot    *tgbotapi.BotAPI
+	logger *zap.Logger
+}
+
+// NewUpdateChan creates a new channel to get update
+func (b bot) NewUpdateChan() updates {
+	u := tgbotapi.NewUpdate(0)
+	u.Timeout = 60
+	ch, err := b.bot.GetUpdatesChan(u)
+	if err != nil {
+		panic(err)
+	}
+	return updates{ch: ch, bot: b.bot, logger: b.logger}
+}
+
+// New returns a new instance of the router
+func New(cfg config.BotConfig, logger *zap.Logger) bot {
+	b, err := tgbotapi.NewBotAPI(cfg.Token())
+	if err != nil {
+		panic(err)
+	}
+	return bot{
+		bot:    b,
+		logger: logger,
+	}
+}

pkg/bot/server.go

@@ -0,0 +1,15 @@
+package bot
+
+import (
+	"github.com/sid-sun/sample-bot/cmd/config"
+	"github.com/sid-sun/sample-bot/pkg/bot/router"
+	"go.uber.org/zap"
+)
+
+// StartBot starts the bot, inits all the requited submodules and routine for shutdown
+func StartBot(cfg config.Config, logger *zap.Logger) {
+	ch := router.New(cfg.Bot, logger).NewUpdateChan()
+
+	logger.Info("[StartBot] Started Bot")
+	ch.ListenAndServe()
+}