From 66a5e4e3109eb111c743332849491dc85e181d09 Mon Sep 17 00:00:00 2001
From: Maxim Lebedev <git@toby3d.ru>
Date: Fri, 22 Dec 2017 19:45:07 +0500
Subject: [PATCH] :sparkles: Added some bot helpers

For this moment - checkers is message/reply/forwards from/to/about bot
---
 helpers_bot.go | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 helpers_bot.go

diff --git a/helpers_bot.go b/helpers_bot.go
new file mode 100644
index 0000000..c8ae183
--- /dev/null
+++ b/helpers_bot.go
@@ -0,0 +1,78 @@
+package telegram
+
+import (
+	"fmt"
+	"strings"
+)
+
+func (bot *Bot) IsMessageFromMe(msg *Message) bool {
+	return msg.From.ID == bot.Self.ID
+}
+
+func (bot *Bot) IsForwardFromMe(msg *Message) bool {
+	return msg.IsForward() &&
+		msg.ForwardFrom.ID == bot.Self.ID
+}
+
+func (bot *Bot) IsReplyToMe(msg *Message) bool {
+	if msg.Chat.IsPrivate() {
+		return true
+	}
+
+	return msg.IsReply() &&
+		bot.IsMessageFromMe(msg.ReplyToMessage)
+}
+
+func (bot *Bot) IsCommandToMe(msg *Message) bool {
+	if msg.Chat.IsPrivate() {
+		return msg.IsCommand()
+	}
+
+	return msg.IsCommand() &&
+		strings.HasSuffix(
+			strings.ToLower(msg.Command()),
+			strings.ToLower(fmt.Sprint("@", bot.Self.Username)),
+		)
+}
+
+func (bot *Bot) IsMessageMentionsMe(msg *Message) bool {
+	if msg.Entities == nil ||
+		len(msg.Entities) <= 0 {
+		return false
+	}
+
+	for _, entity := range msg.Entities {
+		if entity.Type != EntityMention ||
+			entity.User == nil {
+			continue
+		}
+
+		if entity.User.ID == bot.Self.ID {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (bot *Bot) IsForwardMentionsMe(msg *Message) bool {
+	return msg.IsForward() &&
+		bot.IsMessageMentionsMe(msg)
+}
+
+func (bot *Bot) IsReplyMentionsMe(msg *Message) bool {
+	return msg.IsReply() &&
+		bot.IsMessageMentionsMe(msg.ReplyToMessage)
+}
+
+func (bot *Bot) IsMessageToMe(msg *Message) bool {
+	switch {
+	case msg.Chat.IsPrivate(),
+		bot.IsCommandToMe(msg),
+		bot.IsReplyToMe(msg),
+		bot.IsMessageMentionsMe(msg):
+		return true
+	default:
+		return false
+	}
+}