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session.go
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session.go
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package botmeans
import (
"fmt"
"github.com/go-telegram-bot-api/telegram-bot-api"
"github.com/jinzhu/gorm"
"strings"
"time"
)
//SessionBase passes core session identifiers
type SessionBase struct {
TelegramUserID int64 `sql:"index"`
TelegramUserName string `sql:"index"`
TelegramChatID int64 `sql:"index"`
hasCome bool
hasLeft bool
}
//Session represents the user in chat.
type Session struct {
SessionBase
ID int64 `sql:"index;unique"`
UserData string `sql:"type:jsonb"`
db *gorm.DB
FirstName string
LastName string
ChatName string
CreatedAt time.Time
isNew bool
}
//IsNew should return true if the session has not been saved yet
func (session *Session) IsNew() bool {
return session.isNew
}
//HasLeft returns true if the user has gone from chat
func (session *Session) HasLeft() bool {
return session.hasLeft
}
//HasCome returns true if the user has come to chat
func (session *Session) HasCome() bool {
return session.hasCome
}
//IsOneToOne should return true if the session represents one-to-one chat with bot
func (session *Session) IsOneToOne() bool {
return session.TelegramChatID == session.TelegramUserID
}
//ChatId returns chat id
func (session *Session) ChatId() int64 {
return session.TelegramChatID
}
func (session *Session) UserId() int64 {
return session.TelegramUserID
}
//SetData sets internal UserData field to JSON representation of given value
func (session *Session) SetData(value interface{}) {
if session.db != nil {
s := Session{}
if session.db.Where("id=?", session.ID).First(&s).Error == nil {
session.UserData = s.UserData
}
}
session.UserData = serialize(session.UserData, value)
session.Save()
}
//GetData extracts internal UserData field to given value
func (session *Session) GetData(value interface{}) {
deserialize(session.UserData, value)
}
//UserName returns name of the user of this session
func (session *Session) UserName() string {
s := strings.TrimSpace(session.FirstName + " " + session.LastName)
if s == "" {
s = session.TelegramUserName
}
return s
}
//ChatName returns name of the chat of this session
func (session *Session) ChatTitle() string {
return session.ChatName
}
func (session *Session) Id() int64 {
return session.ID
}
//Save saves the session to sql table
func (session *Session) Save() error {
if session.db != nil {
if err := session.db.Save(session).Error; err == nil {
session.isNew = false
return nil
} else {
return err
}
}
return fmt.Errorf("db not set")
}
//Locale returns the locale for this user
func (session *Session) Locale() string {
type Locale string
var lo Locale
session.GetData(&lo)
return string(lo)
}
func (session *Session) SetLocale(locale string) {
type Locale string
var lo Locale = Locale(locale)
session.SetData(lo)
}
//String represents the session as string
func (session *Session) String() string {
return fmt.Sprintf("UserID: %v, UserName: %v, ChatID: %v, New: %v, Come: %v, Left: %v, Data: %v, Name: %v %v, Locale: %v",
session.TelegramUserID,
session.TelegramUserName,
session.TelegramChatID,
session.isNew,
session.hasCome,
session.hasLeft,
session.UserData,
session.FirstName,
session.LastName,
session.Locale(),
)
}
//SessionInitDB creates sql table for Session
func SessionInitDB(db *gorm.DB) {
db.AutoMigrate(&Session{})
}
//SessionLoader creates the session and loads the data if the session exists
func SessionLoader(base SessionBase, db *gorm.DB, BotID int64, api *tgbotapi.BotAPI) (SessionInterface, error) {
TelegramUserID := base.TelegramUserID
TelegramUserName := base.TelegramUserName
TelegramChatID := base.TelegramChatID
if TelegramUserID == 0 && TelegramUserName == "" {
return nil, fmt.Errorf("Invalid session IDs")
}
//TODO!
if TelegramUserID == BotID {
return nil, fmt.Errorf("Cannot create the session for myself")
}
session := &Session{}
session.db = db
found := !db.Where("((telegram_user_id=? and telegram_user_id!=0) or (telegram_user_name=? and telegram_user_name!='')) and telegram_chat_id=?", TelegramUserID, TelegramUserName, TelegramChatID).
First(session).RecordNotFound()
err := fmt.Errorf("Unknown")
if api != nil && (!found || session.FirstName == "" && session.LastName == "") {
if chatMember, err := api.GetChatMember(tgbotapi.ChatConfigWithUser{TelegramChatID, "", int(TelegramUserID)}); err == nil {
session.FirstName = chatMember.User.FirstName
session.LastName = chatMember.User.LastName
}
}
if !found {
session.isNew = true
session.TelegramChatID = TelegramChatID
session.TelegramUserID = TelegramUserID
session.TelegramUserName = TelegramUserName
session.CreatedAt = time.Now()
if api != nil {
if chat, err := api.GetChat(tgbotapi.ChatConfig{ChatID: session.TelegramChatID}); err == nil {
session.ChatName = chat.Title
}
}
session.UserData = "{}"
err = nil
}
err = nil
session.hasLeft = base.hasLeft
session.hasCome = base.hasCome
session.TelegramUserID = base.TelegramUserID
session.TelegramUserName = base.TelegramUserName
return session, err
}
type NewSessionCreator func(chatId int64, username string) (SessionInterface, error)
//SessionInterface defines the user session
type SessionInterface interface {
ChatIdentifier
UserIdentifier
PersistentSaver
DataGetSetter
IsNew() bool
HasLeft() bool
HasCome() bool
Locale() string
UserName() string
Identifiable
SetLocale(string)
ChatTitle() string
IsOneToOne() bool
}