/
slack_hook.go
434 lines (351 loc) · 10.9 KB
/
slack_hook.go
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package slack_webhook
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"net/url"
"strconv"
"strings"
"github.com/pkg/errors"
"github.com/slack-go/slack"
)
const SlackAPIEndpoint = "https://slack.com/api"
type Handler struct {
token string
Identity BasicIdentity
}
//HookMessage SlackにIncommingWebhook経由のMessage送信形式
type Message struct {
TS string `json:"ts,omitempty"`
Channel string `json:"channel"`
Type string `json:"type,omitempty"`
Text string `json:"text,omitempty"`
Blocks []BlockBase `json:"blocks,omitempty"`
Attachments []Attachment `json:"attachments,omitempty"`
LinkNames bool `json:"link_names,omitempty"`
Username string `json:"username,omitempty"`
User string `json:"user,omitempty"`
AsUser bool `json:"as_user,omitempty"`
Parse string `json:"parse,omitempty"`
ThreadTimestamp string `json:"thread_ts,omitempty"`
ReplyBroadcast bool `json:"reply_broadcast,omitempty"`
UnfurlLinks bool `json:"unfurl_links"`
UnfurlMedia bool `json:"unfurl_media"`
IconURL string `json:"icon_url,omitempty"`
IconEmoji string `json:"icon_emoji,omitempty"`
}
// Attachment contains all the information for an attachment
type Attachment struct {
Color string `json:"color,omitempty"`
Fallback string `json:"fallback,omitempty"`
CallbackID string `json:"callback_id,omitempty"`
ID int `json:"id,omitempty"`
AuthorID string `json:"author_id,omitempty"`
AuthorName string `json:"author_name,omitempty"`
AuthorSubname string `json:"author_subname,omitempty"`
AuthorLink string `json:"author_link,omitempty"`
AuthorIcon string `json:"author_icon,omitempty"`
Title string `json:"title,omitempty"`
TitleLink string `json:"title_link,omitempty"`
Pretext string `json:"pretext,omitempty"`
Text string `json:"text,omitempty"`
ImageURL string `json:"image_url,omitempty"`
ThumbURL string `json:"thumb_url,omitempty"`
ServiceName string `json:"service_name,omitempty"`
ServiceIcon string `json:"service_icon,omitempty"`
FromURL string `json:"from_url,omitempty"`
OriginalURL string `json:"original_url,omitempty"`
Fields []slack.AttachmentField `json:"fields,omitempty"`
Actions []slack.AttachmentAction `json:"actions,omitempty"`
MarkdownIn []string `json:"mrkdwn_in,omitempty"`
Footer string `json:"footer,omitempty"`
FooterIcon string `json:"footer_icon,omitempty"`
Ts json.Number `json:"ts,omitempty"`
}
type GetConversationHistoryParameters struct {
ChannelID string `json:"channel"`
Cursor string `json:"cursor,omitempty"`
Inclusive bool `json:"inclusive,omitempty"`
Latest string `json:"latest,omitempty"`
Limit int `json:"limit,omitempty"`
Oldest string `json:"oldest,omitempty"`
}
type FilesRemoteAddParameters struct {
Title string
FileType string
ExternalID string
ExternalURL string
IndexableFileContents io.Reader
PreviewImage io.Reader
File io.Reader
}
type File struct {
FileName string
Reader io.Reader
FileType string
InitialComment string
ThreadTimestamp string
}
type UnfURLs map[string]UnfURL
type UnfURLsParameters struct {
Channel string `json:"channel"`
TimeStamp string `json:"ts"`
UnfURLs UnfURLs `json:"unfurls"`
Source string `json:"source,omitempty"`
UnfUrlID string `json:"unfurl_id,omitempty"`
UserAuthBlocks []BlockBase `json:"user_auth_blocks,omitempty"`
UserAuthRequired bool `json:"user_auth_required,omitempty"`
}
type UnfURL struct {
HideColor bool `json:"hide_color"`
Blocks []BlockBase `json:"blocks"`
}
func New(token string) *Handler {
var handler = &Handler{token: token}
identity, _ := handler.AuthTest()
handler.Identity = *identity
return handler
}
func (s *Handler) send(jsondataBytes []byte, method string) (string, error) {
var req *http.Request
switch method {
case "update":
req, _ = http.NewRequest("POST", SlackAPIEndpoint+"/chat.update", bytes.NewBuffer(jsondataBytes))
case "delete":
req, _ = http.NewRequest("POST", SlackAPIEndpoint+"/chat.delete", bytes.NewBuffer(jsondataBytes))
case "send":
req, _ = http.NewRequest("POST", SlackAPIEndpoint+"/chat.postMessage", bytes.NewBuffer(jsondataBytes))
}
req.Header.Set("Authorization", "Bearer "+s.token)
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", fmt.Errorf("MessageSendError(Slack): %w", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", fmt.Errorf("readall: %w", err)
}
if resp.StatusCode != 200 {
return "", fmt.Errorf("failed send slack: body: %s", body)
}
var r struct {
OK bool `json:"ok"`
TS string `json:"ts"`
}
err = json.Unmarshal(body, &r)
if err != nil {
return "", fmt.Errorf("unmarshal: %w", err)
}
if !r.OK {
return "", fmt.Errorf("failed send slack: body: %s", body)
}
return r.TS, nil
}
//Send json形式で指定したURLにPOSTする。
func (s *Handler) Send(message Message) (string, error) {
jsonDataBytes, _ := json.Marshal(message)
return s.send(jsonDataBytes, "send")
}
func (s *Handler) Update(message Message) (string, error) {
jsonDataBytes, _ := json.Marshal(message)
return s.send(jsonDataBytes, "update")
}
func (s Handler) Remove(channel, ts string) (string, error) {
type RemoveMessage struct {
Channel string `json:"channel"`
TS string `json:"ts"`
}
var removeMessage = &RemoveMessage{
Channel: channel,
TS: ts,
}
jsonDataBytes, _ := json.Marshal(removeMessage)
return s.send(jsonDataBytes, "delete")
}
func (s *Handler) GetMessages(channelID, timestamp string, limit int) ([]Message, error) {
var requestAttr = url.Values{}
requestAttr.Set("channel", channelID)
requestAttr.Set("latest", timestamp)
requestAttr.Set("limit", strconv.Itoa(limit))
requestAttr.Set("inclusive", "true")
var hasMore = true
var messages = []Message{}
var cursor string
// get all messages while Slack sends "has_more" message
for hasMore {
if len(messages) >= limit {
break
}
requestAttr.Set("cursor", cursor)
req, _ := http.NewRequest("GET", SlackAPIEndpoint+"/conversations.history?"+requestAttr.Encode(), nil)
req.Header.Set("Authorization", "Bearer "+s.token)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, fmt.Errorf("MessageSendError(Slack): %w", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("readall: %w", err)
}
if resp.StatusCode != 200 {
return nil, fmt.Errorf("failed send slack: body: %s", body)
}
var r struct {
OK bool `json:"ok"`
Messages []Message `json:"messages"`
HasMore bool `json:"has_more"`
ResponseMeta struct {
NextCursor string `json:"next_cursor"`
} `json:"response_metadata"`
}
err = json.Unmarshal(body, &r)
if err != nil {
return nil, fmt.Errorf("unmarshal: %w", err)
}
if !r.OK {
return nil, fmt.Errorf("failed send slack: body: %s", body)
}
if err != nil {
return nil, err
}
messages = append(messages, r.Messages...)
hasMore = r.HasMore
cursor = r.ResponseMeta.NextCursor
}
return messages, nil
}
func (s *Handler) GetMessage(channelID, timestamp string) (*Message, error) {
msgs, err := s.GetMessages(channelID, timestamp, 1)
if len(msgs) < 1 {
return nil, errors.Wrap(err, "NotFound")
}
return &msgs[0], err
}
func (s *Handler) FilesUpload(file File, channels ...string) (*slack.File, error) {
var body = new(bytes.Buffer)
var mw = multipart.NewWriter(body)
if file.FileName != "" {
pw, err := mw.CreateFormField("filename")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtFileName")
}
pw.Write([]byte(file.FileName))
}
if file.FileType != "" {
pw, err := mw.CreateFormField("filetype")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtFileType")
}
pw.Write([]byte(file.FileType))
}
if file.InitialComment != "" {
pw, err := mw.CreateFormField("initial_comment")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtInitialComment")
}
pw.Write([]byte(file.InitialComment))
}
if len(channels) > 0 {
pw, err := mw.CreateFormField("channels")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtInitialComment")
}
pw.Write([]byte(strings.Join(channels, ",")))
}
if file.ThreadTimestamp != "" {
pw, err := mw.CreateFormField("thread_ts")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtThreadTimestamp")
}
pw.Write([]byte(file.ThreadTimestamp))
}
pw, err := mw.CreateFormField("content")
if err != nil {
return nil, errors.Wrap(err, "CreatingPartAtFile")
}
io.Copy(pw, file.Reader)
mw.Close()
var req *http.Request
var reqURI = fmt.Sprintf("%s/files.upload", SlackAPIEndpoint)
req, err = http.NewRequest("POST", reqURI, body)
if err != nil {
return nil, errors.Wrap(err, "Requrst")
}
req.Header.Set("Authorization", "Bearer "+s.token)
req.Header.Set("Content-Type", mw.FormDataContentType())
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, errors.Wrap(err, "Sending")
}
defer resp.Body.Close()
type responseAttrType struct {
OK bool `json:"ok"`
Error string `json:"error"`
File slack.File `json:"file"`
}
var responseAttr responseAttrType
err = func() error {
defer func() {
err := recover()
if err != nil {
log.Printf("Panic in Decoding JSON: %v\n", err)
}
}()
return json.NewDecoder(resp.Body).Decode(&responseAttr)
}()
if err != nil {
return &responseAttr.File, errors.Wrap(err, "DecodingJSON")
}
if !responseAttr.OK {
return &responseAttr.File, errors.New("SlackAPIError: " + responseAttr.Error)
}
return &responseAttr.File, nil
}
func (s *Handler) ChatUnfURL(parameters UnfURLsParameters) error {
var body = new(bytes.Buffer)
err := json.NewEncoder(body).Encode(parameters)
if err != nil {
return errors.Wrap(err, "JsonEncode")
}
var reqURI = fmt.Sprintf("%s/chat.unfurl", SlackAPIEndpoint)
req, err := http.NewRequest("POST", reqURI, body)
if err != nil {
return errors.Wrap(err, "Requrst")
}
req.Header.Set("Authorization", "Bearer "+s.token)
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return errors.Wrap(err, "Request")
}
type responseAttrType struct {
OK bool `json:"ok"`
Error string `json:"error"`
}
var responseAttr responseAttrType
err = func() error {
defer func() {
err := recover()
if err != nil {
log.Printf("Error At Json Decoding: %v", err)
}
}()
return json.NewDecoder(resp.Body).Decode(&responseAttr)
}()
if err != nil {
return errors.Wrap(err, "JsonDecode")
}
if !responseAttr.OK {
return errors.New(fmt.Sprintf("ErrorAtUnfurlAPI: %s", responseAttr.Error))
}
return nil
}