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//Package tamtam implements TamTam Bot API.
//Official documentation: https://dev.tamtam.chat/
package tamtam
import (
"context"
"encoding/json"
"io/ioutil"
"log"
"net/http"
"net/url"
"strconv"
"time"
"github.com/neonxp/tamtam/schemes"
)
//Api implements main part of TamTam API
type Api struct {
Bots *bots
Chats *chats
Messages *messages
Subscriptions *subscriptions
Uploads *uploads
client *client
timeout int
pause int
}
// New TamTam Api object
func New(key string) *Api {
timeout := 30
u, _ := url.Parse("https://botapi.tamtam.chat/")
cl := newClient(key, "0.1.8", u, &http.Client{Timeout: time.Duration(timeout) * time.Second})
return &Api{
Bots: newBots(cl),
Chats: newChats(cl),
Uploads: newUploads(cl),
Messages: newMessages(cl),
Subscriptions: newSubscriptions(cl),
client: cl,
timeout: timeout,
pause: 1,
}
}
func (a *Api) bytesToProperUpdate(b []byte) schemes.UpdateInterface {
u := new(schemes.Update)
_ = json.Unmarshal(b, u)
switch u.GetUpdateType() {
case schemes.TypeMessageCallback:
upd := new(schemes.MessageCallbackUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeMessageCreated:
upd := new(schemes.MessageCreatedUpdate)
_ = json.Unmarshal(b, upd)
for _, att := range upd.Message.Body.RawAttachments {
upd.Message.Body.Attachments = append(upd.Message.Body.Attachments, a.bytesToProperAttachment(att))
}
return upd
case schemes.TypeMessageRemoved:
upd := new(schemes.MessageRemovedUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeMessageEdited:
upd := new(schemes.MessageEditedUpdate)
_ = json.Unmarshal(b, upd)
for _, att := range upd.Message.Body.RawAttachments {
upd.Message.Body.Attachments = append(upd.Message.Body.Attachments, a.bytesToProperAttachment(att))
}
return upd
case schemes.TypeBotAdded:
upd := new(schemes.BotAddedToChatUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeBotRemoved:
upd := new(schemes.BotRemovedFromChatUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeUserAdded:
upd := new(schemes.UserAddedToChatUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeUserRemoved:
upd := new(schemes.UserRemovedFromChatUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeBotStarted:
upd := new(schemes.BotStartedUpdate)
_ = json.Unmarshal(b, upd)
return upd
case schemes.TypeChatTitleChanged:
upd := new(schemes.ChatTitleChangedUpdate)
_ = json.Unmarshal(b, upd)
return upd
}
return nil
}
func (a *Api) bytesToProperAttachment(b []byte) schemes.AttachmentInterface {
attachment := new(schemes.Attachment)
_ = json.Unmarshal(b, attachment)
switch attachment.GetAttachmentType() {
case schemes.AttachmentAudio:
res := new(schemes.AudioAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentContact:
res := new(schemes.ContactAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentFile:
res := new(schemes.FileAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentImage:
res := new(schemes.PhotoAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentKeyboard:
res := new(schemes.InlineKeyboardAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentLocation:
res := new(schemes.LocationAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentShare:
res := new(schemes.ShareAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentSticker:
res := new(schemes.StickerAttachment)
_ = json.Unmarshal(b, res)
return res
case schemes.AttachmentVideo:
res := new(schemes.VideoAttachment)
_ = json.Unmarshal(b, res)
return res
}
return attachment
}
func (a *Api) getUpdates(limit int, timeout int, marker int, types []string) (*schemes.UpdateList, error) {
result := new(schemes.UpdateList)
values := url.Values{}
if limit > 0 {
values.Set("limit", strconv.Itoa(limit))
}
if timeout > 0 {
values.Set("timeout", strconv.Itoa(timeout))
}
if marker > 0 {
values.Set("marker", strconv.Itoa(marker))
}
if len(types) > 0 {
for _, t := range types {
values.Add("types", t)
}
}
body, err := a.client.request(http.MethodGet, "updates", values, nil)
if err != nil {
return result, err
}
defer func() {
if err := body.Close(); err != nil {
log.Println(err)
}
}()
jb, _ := ioutil.ReadAll(body)
return result, json.Unmarshal(jb, result)
}
//GetUpdates returns updates channel
func (a *Api) GetUpdates(ctx context.Context) chan schemes.UpdateInterface {
ch := make(chan schemes.UpdateInterface)
go func() {
for {
select {
case <-ctx.Done():
close(ch)
return
case <-time.After(time.Duration(a.pause) * time.Second):
var marker int
for {
upds, err := a.getUpdates(50, a.timeout, marker, []string{})
if err != nil {
log.Println(err)
break
}
if len(upds.Updates) == 0 {
break
}
for _, u := range upds.Updates {
ch <- a.bytesToProperUpdate(u)
}
marker = *upds.Marker
}
}
}
}()
return ch
}
//GetHandler returns http handler for webhooks
func (a *Api) GetHandler(updates chan interface{}) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
defer func() {
if err := r.Body.Close(); err != nil {
log.Println(err)
}
}()
b, _ := ioutil.ReadAll(r.Body)
updates <- a.bytesToProperUpdate(b)
}
}
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