Enable replies on Twitter and Telegram

By default, when a product is available, a notification is sent. When that same
product is not available, a reply is sent to the original message. With tons of
notifications, replies might be seen as flooding. This commit adds an option to
explicitly enable replies on Twitter and Telegram notifiers. By default, reply
messages are disabled.

Signed-off-by: Julien Riou <julien@riou.xyz>

README.md

@@ -131,10 +131,12 @@ Options:
     * `access_token`: authentication token generated for your Twitter account
     * `access_token_secret`: authentication token secret generated for your Twitter account
     * `hashtags`: list of key/value used to append hashtags to each tweet. Key is the pattern to match in the product name, value is the string to append to the tweet. For example, `{"twitter": {"hashtags": [{"rtx 3090": "#nvidia #rtx3090"}]}}` will detect `rtx 3090` to append `#nvidia #rtx3090` at the end of the tweet.
+    * `enable_replies`: reply to original message when product is not available anymore
 * `telegram` (optional):
     * `channel_name`: send message to a channel (ex: `@channel`)
     * `chat_id`: send message to a chat (ex: `1234`)
     * `token`: key returned by BotFather
+    * `enable_replies`: reply to original message when product is not available anymore
 * `include_regex` (optional): include products with a name matching this regexp
 * `exclude_regex` (optional): exclude products with a name matching this regexp
 * `browser_address` (optional): set headless browser address (ex: `http://127.0.0.1:9222`)

config.go

@@ -25,13 +25,15 @@ type TwitterConfig struct {
 	AccessToken       string              `json:"access_token"`
 	AccessTokenSecret string              `json:"access_token_secret"`
 	Hashtags          []map[string]string `json:"hashtags"`
+	EnableReplies     bool                `json:"enable_replies"`
 }
 
 // TelegramConfig to store Telegram API key
 type TelegramConfig struct {
-	Token       string `json:"token"`
-	ChatID      int64  `json:"chat_id"`
-	ChannelName string `json:"channel_name"`
+	Token         string `json:"token"`
+	ChatID        int64  `json:"chat_id"`
+	ChannelName   string `json:"channel_name"`
+	EnableReplies bool   `json:"enable_replies"`
 }
 
 // ApiConfig to store HTTP API configuration

notifier_telegram.go

@@ -19,11 +19,11 @@ type TelegramMessage struct {
 
 // TelegramNotifier to manage notifications to Twitter
 type TelegramNotifier struct {
-	db          *gorm.DB
-	bot         *telegram.BotAPI
-	chatID      int64
-	channelName string
-	timeout     int
+	db            *gorm.DB
+	bot           *telegram.BotAPI
+	chatID        int64
+	channelName   string
+	enableReplies bool
 }
 
 // NewTelegramNotifier to create a Notifier with Telegram capabilities
@@ -42,10 +42,11 @@ func NewTelegramNotifier(config *TelegramConfig, db *gorm.DB) (*TelegramNotifier
 	log.Debugf("connected to telegram as %s", bot.Self.UserName)
 
 	return &TelegramNotifier{
-		db:          db,
-		bot:         bot,
-		chatID:      config.ChatID,
-		channelName: config.ChannelName,
+		db:            db,
+		bot:           bot,
+		chatID:        config.ChatID,
+		channelName:   config.ChannelName,
+		enableReplies: config.EnableReplies,
 	}, nil
 }
 
@@ -92,15 +93,17 @@ func (n *TelegramNotifier) NotifyWhenNotAvailable(productURL string, duration ti
 		return nil
 	}
 
-	// format message
-	text := fmt.Sprintf("And it's gone (%s)", duration)
+	if n.enableReplies {
+		// format message
+		text := fmt.Sprintf("And it's gone (%s)", duration)
 
-	// send reply on telegram
-	_, err := n.sendMessage(text, m.MessageID)
-	if err != nil {
-		return fmt.Errorf("failed to reply on telegram: %s", err)
+		// send reply on telegram
+		_, err := n.sendMessage(text, m.MessageID)
+		if err != nil {
+			return fmt.Errorf("failed to reply on telegram: %s", err)
+		}
+		log.Infof("reply to telegram message %d sent", m.MessageID)
 	}
-	log.Infof("reply to telegram message %d sent", m.MessageID)
 
 	// remove message from database
 	trx = n.db.Unscoped().Delete(&m)

notifier_twitter.go

@@ -26,10 +26,11 @@ type Tweet struct {
 
 // TwitterNotifier to manage notifications to Twitter
 type TwitterNotifier struct {
-	db          *gorm.DB
-	client      *twitter.Client
-	user        *twitter.User
-	hashtagsMap []map[string]string
+	db            *gorm.DB
+	client        *twitter.Client
+	user          *twitter.User
+	hashtagsMap   []map[string]string
+	enableReplies bool
 }
 
 // NewTwitterNotifier creates a TwitterNotifier
@@ -57,7 +58,7 @@ func NewTwitterNotifier(c *TwitterConfig, db *gorm.DB) (*TwitterNotifier, error)
 	}
 	log.Debugf("connected to twitter as @%s", user.ScreenName)
 
-	return &TwitterNotifier{client: client, user: user, hashtagsMap: c.Hashtags, db: db}, nil
+	return &TwitterNotifier{client: client, user: user, hashtagsMap: c.Hashtags, db: db, enableReplies: c.EnableReplies}, nil
 }
 
 // create a brand new tweet
@@ -147,15 +148,17 @@ func (c *TwitterNotifier) NotifyWhenNotAvailable(productURL string, duration tim
 		return nil
 	}
 
-	// format message
-	message := fmt.Sprintf("And it's gone (%s)", duration)
+	if c.enableReplies {
+		// format message
+		message := fmt.Sprintf("And it's gone (%s)", duration)
 
-	// close thread on twitter
-	_, err := c.replyToTweet(tweet.TweetID, message)
-	if err != nil {
-		return fmt.Errorf("failed to create reply tweet: %s", err)
+		// close thread on twitter
+		_, err := c.replyToTweet(tweet.TweetID, message)
+		if err != nil {
+			return fmt.Errorf("failed to create reply tweet: %s", err)
+		}
+		log.Infof("reply to tweet %d sent", tweet.TweetID)
 	}
-	log.Infof("reply to tweet %d sent", tweet.TweetID)
 
 	// remove tweet from database
 	trx = c.db.Unscoped().Delete(&tweet)