Work on squads, some refactoring

Closes #14
See #8

lib/chatter/chatterinterface/chatterinterface.go

@@ -0,0 +1,24 @@
+// i2_bot – Instinct PokememBro Bot
+// Copyright (c) 2017 Vladimir "fat0troll" Hodakov
+
+package chatterinterface
+
+import (
+	"github.com/go-telegram-bot-api/telegram-bot-api"
+	"lab.pztrn.name/fat0troll/i2_bot/lib/dbmapping"
+)
+
+// ChatterInterface implements Chatter for importing via appcontext.
+type ChatterInterface interface {
+	Init()
+
+	GetOrCreateChat(update *tgbotapi.Update) (dbmapping.Chat, bool)
+	GetChatByID(chatID int64) (dbmapping.Chat, bool)
+	GetAllPrivateChats() ([]dbmapping.Chat, bool)
+	GetAllGroupChats() ([]dbmapping.Chat, bool)
+
+	UpdateChatTitle(chatRaw *dbmapping.Chat, newTitle string) (*dbmapping.Chat, bool)
+	UpdateChatTelegramID(update *tgbotapi.Update) (*dbmapping.Chat, bool)
+
+	GroupsList(update *tgbotapi.Update) string
+}